- published: 05 Dec 2012
- views: 13603
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Second Law of Thermodynamics
The second law of thermodynamics is an expression of the universal principle of entropy, stating that the entropy of an isolated system which is not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium; and that the entropy change dS of a system undergoing any infinitesimal reversible process is given by δq / T, where δq is the heat supplied to the system and T is the absolute temperature of The second law of thermodynamics
The second law of thermodynamics comes in more than one form, but let's state in a way that makes it obviously true, based on what you've observed from simply being alive.
The second law states that heat flows naturally from regions of higher temperature to regions of lower temperature, but that it will not flow naturally the other way.
Heat can be made to flow from a colder region to a hotter region, which is exactly what happens in an air conditioner, but heat only does this when it is forced. On the other hand, heat flows from hot to cold spontaneously.
Heat engines
We'll move on to look at heat engines, which are devices that use heat to do work. A basic heat engine consists of a gas confined by a piston in a cylinder. If the gas is heated, it expands, moving the piston. This wouldn't be a particularly practical engine, though, because once the gas reaches equilibrium the motion would stop. A practical engine goes through cycles; the piston has to move back and forth. Once the gas is heated, moving the piston up, it can be cooled and the piston will move back down. A cycle of heating and cooling will move the piston up and down.
A necessary component of a heat engine, then, is that two temperatures are involved. At one stage the system is heated, at another it is cooled.
In a full cycle of a heat engine, three things happen:
1.Heat is added. This is at a relatively high temperature, so the heat can be called QH.
2.Some of the energy from that input heat is used to perform work (W).
3.The rest of the heat is removed at a relatively cold temperature (QC).
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- published: 30 Apr 2010
- views: 117510
This is maybe the simplest heat engine that you can make. It is terribly inefficient, but it works! You only need a few parts in order to put it together.
- published: 30 Mar 2015
- views: 8209
''Creativity is inventing, experimenting, growing, taking risks, breaking rules, making mistakes and having fun.'' A video assignment given by lecturer to have more understandings about thermodynamics and having fun at the same time! Never stop learning and never stop having fun! :D
- published: 06 May 2014
- views: 5247
Video of a homemade heat engine that a student in my conceptual physics course constructed for as a "with honors" project.
- published: 14 Jan 2010
- views: 286578
Here is a little engine that demonstrates a magnetic property known as the Curie Effect.
Normal magnets and also materials which are attracted to magnets (such as iron and nickel) are referred to as ferro-magnetic. The French scientist Pierre Curie discovered that ferro-magnetic materials have a critical temperature, at which they lose their ferro-magnetic behaviour. For example if you heat a piece of iron to 770 degrees Centigrade, which is its Curie Point, the piece of iron loses its ferro-magnetism and is no longer attracted to a magnet. However once the piece of iron cools down to below the Curie Point, it regains its ferro-magnetic behaviour.
This little heat engine uses the Curie Effect. A small piece of aluminium wire is suspended from a brass bolt - neither of these two metals are ferro-magnetic. However at the end of the aluminium wire is a little loop of nickel alloy wire, which is ferro-magnetic, and which has a very low Curie Point.
Normally the loop of nickel alloy is attracted by the strong neodymium magnet, which is placed at one side. So the default position of the aluminium wire is at an angle of about 45 degrees, attracted by the neodymium magnet, although the wire is not long enough for the loop of nickel alloy to actually make contact with the magnet.
However when you then light the candle, the little motor comes to life. While the loop of nickel alloy is pulled towards the magnet, it will be in the flame from the candle, and will be heated. Once the loop of wire reaches the Curie Point, it loses its ferro-magnetic properties, in other words it is no longer attracted to the neodymium magnet, and the wire now reverts to hanging straight down.
The loop of nickel alloy is now out of the candle flame, and starts to cool down. As soon as it falls below the Curie Point, it regains its ferro-magnetic properties, and is then attracted to the magnet again. However now the nickel alloy wire is back in the flame and starts to heat up again, and the whole process starts all over again!
- published: 20 Mar 2014
- views: 127665
Sunflower heat engine made from a coffee bag - running in sunlight and how-it-works. The demonstrations in sunlight include a comparison with the petals blackened.
Support RimstarOrg on Patreon https://www.patreon.com/user?u=680159
Subscribe for new videos every week http://www.youtube.com/user/rimstarorg?sub_confirmation=1
Go to the main channel page here https://youtube.com/rimstarorg
See also:
How to Make Sunflower Heat Engine using Coffee Bag
https://www.youtube.com/watch?v=m9i3VVd9ISk&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h
Corona Motor (v2) or Electrostatic Motor/Atmospheric Motor
https://www.youtube.com/watch?v=hpvHRHs7o7I&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h
Ball Bearing Motor - How to Make/How it Works
https://www.youtube.com/watch?v=DjKhggNJGls&list;=PLFsZmHTZL-zmfXxstlxuJgRE9bOGobEVu
Here's my webpage all about this sunflower heat engine:
http://rimstar.org/science_electronics_projects/sunflower_heat_engine_with_coffee_bag.htm
Inspired by Blade's Sunflower heat engine https://www.youtube.com/watch?v=4ukwkiUOEs8. The use of water glasses was inspired by Lidmotor's video https://www.youtube.com/watch?v=5eruZktfZ5o.
Follow behind-the-scenes on:
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Facebook https://www.facebook.com/rimstarorg
http://rimstar.org
Essence - music by audionautix.com
- published: 28 Aug 2015
- views: 6883
Introduction to the Carnot heat engine and the Rankine cycle. Made by faculty at the University of Colorado Boulder, Department of Chemical and Biological Engineering.
Check out our Thermodynamics playlists: https://www.youtube.com/user/LearnChemE/playlists?shelf_id=11&view;=50&sort;=dd
Are you using a textbook? Check out our website for videos organized by topic and by chapter: http://www.learncheme.com/screencasts/thermodynamics
- published: 15 Mar 2012
- views: 14480
These three things use input WORK to move heat from cold to hot (which is NOT the way the heat would like to go).
- published: 06 Dec 2012
- views: 31131
In thermodynamics, a heat engine is a system that performs the conversion of heat or thermal energy to mechanical work. It does this by bringing a working substance from a high temperature state to a lower temperature state. A heat "source" generates thermal energy that brings the working substance to the high temperature state. The working substance generates work in the "working body" of the engine while transferring heat to the colder "sink" until it reaches a low temperature state. During this process some of the thermal energy is converted into work by exploiting the properties of the working substance. The working substance can be any system with a non-zero heat capacity, but it usually is a gas or liquid.
In general an engine converts energy to mechanical work. Heat engines distinguish themselves from other types of engines by the fact that their efficiency is fundamentally limited by Carnot's theorem. Although this efficiency limitation can be a drawback, an advantage of heat engines is that most forms of energy can be easily converted to heat by processes like exothermic reactions (such as combustion), absorption of light or energetic particles, friction, dissipation and resistance. Since the heat source that supplies thermal energy to the engine can thus be powered by virtually any kind of energy, heat engines are very versatile and have a wide range of applicability.
This page contains text from Wikipedia, the Free Encyclopedia -
http://en.wikipedia.org/wiki/Heat_engine
This article is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License, which means that you can copy and modify it as long as the entire work (including additions) remains under this license.
This article is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License, which means that you can copy and modify it as long as the entire work (including additions) remains under this license.
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12:23A Heat Engine Can Use Heat to do Work. But It Can't Be Perfectly Efficient! | Doc Physics
A Heat Engine Can Use Heat to do Work. But It Can't Be Perfectly Efficient! | Doc PhysicsA Heat Engine Can Use Heat to do Work. But It Can't Be Perfectly Efficient! | Doc Physics
Hero's engine - so simple! -
4:37Heat Engines And Second Law Of Thermodynamics
Heat Engines And Second Law Of ThermodynamicsHeat Engines And Second Law Of Thermodynamics
Follow us at: https://plus.google.com/+tutorvista/ Check us out at http://physics.tutorvista.com/thermodynamics/second-law-of-thermodynamics.html Second Law of Thermodynamics The second law of thermodynamics is an expression of the universal principle of entropy, stating that the entropy of an isolated system which is not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium; and that the entropy change dS of a system undergoing any infinitesimal reversible process is given by δq / T, where δq is the heat supplied to the system and T is the absolute temperature of The second law of thermodynamics The second law of thermodynamics comes in more than one form, but let's state in a way that makes it obviously true, based on what you've observed from simply being alive. The second law states that heat flows naturally from regions of higher temperature to regions of lower temperature, but that it will not flow naturally the other way. Heat can be made to flow from a colder region to a hotter region, which is exactly what happens in an air conditioner, but heat only does this when it is forced. On the other hand, heat flows from hot to cold spontaneously. Heat engines We'll move on to look at heat engines, which are devices that use heat to do work. A basic heat engine consists of a gas confined by a piston in a cylinder. If the gas is heated, it expands, moving the piston. This wouldn't be a particularly practical engine, though, because once the gas reaches equilibrium the motion would stop. A practical engine goes through cycles; the piston has to move back and forth. Once the gas is heated, moving the piston up, it can be cooled and the piston will move back down. A cycle of heating and cooling will move the piston up and down. A necessary component of a heat engine, then, is that two temperatures are involved. At one stage the system is heated, at another it is cooled. In a full cycle of a heat engine, three things happen: 1.Heat is added. This is at a relatively high temperature, so the heat can be called QH. 2.Some of the energy from that input heat is used to perform work (W). 3.The rest of the heat is removed at a relatively cold temperature (QC). Please like our facebook page http://www.facebook.com/tutorvista -
71:27XI_91.Heat Engine
XI_91.Heat Engine -
4:07Very Simple Heat Engine
Very Simple Heat EngineVery Simple Heat Engine
This is maybe the simplest heat engine that you can make. It is terribly inefficient, but it works! You only need a few parts in order to put it together. -
11:38Thermodynamics (Physics) Lesson 4 Heat Engines
Thermodynamics (Physics) Lesson 4 Heat EnginesThermodynamics (Physics) Lesson 4 Heat Engines
-
4:52Simple Heat Engine
Simple Heat EngineSimple Heat Engine
''Creativity is inventing, experimenting, growing, taking risks, breaking rules, making mistakes and having fun.'' A video assignment given by lecturer to have more understandings about thermodynamics and having fun at the same time! Never stop learning and never stop having fun! :D -
0:38Simple Heat Engine
Simple Heat EngineSimple Heat Engine
Video of a homemade heat engine that a student in my conceptual physics course constructed for as a "with honors" project. -
2:15Curie Point Magnetic Heat Engine
Curie Point Magnetic Heat EngineCurie Point Magnetic Heat Engine
Here is a little engine that demonstrates a magnetic property known as the Curie Effect. Normal magnets and also materials which are attracted to magnets (such as iron and nickel) are referred to as ferro-magnetic. The French scientist Pierre Curie discovered that ferro-magnetic materials have a critical temperature, at which they lose their ferro-magnetic behaviour. For example if you heat a piece of iron to 770 degrees Centigrade, which is its Curie Point, the piece of iron loses its ferro-magnetism and is no longer attracted to a magnet. However once the piece of iron cools down to below the Curie Point, it regains its ferro-magnetic behaviour. This little heat engine uses the Curie Effect. A small piece of aluminium wire is suspended from a brass bolt - neither of these two metals are ferro-magnetic. However at the end of the aluminium wire is a little loop of nickel alloy wire, which is ferro-magnetic, and which has a very low Curie Point. Normally the loop of nickel alloy is attracted by the strong neodymium magnet, which is placed at one side. So the default position of the aluminium wire is at an angle of about 45 degrees, attracted by the neodymium magnet, although the wire is not long enough for the loop of nickel alloy to actually make contact with the magnet. However when you then light the candle, the little motor comes to life. While the loop of nickel alloy is pulled towards the magnet, it will be in the flame from the candle, and will be heated. Once the loop of wire reaches the Curie Point, it loses its ferro-magnetic properties, in other words it is no longer attracted to the neodymium magnet, and the wire now reverts to hanging straight down. The loop of nickel alloy is now out of the candle flame, and starts to cool down. As soon as it falls below the Curie Point, it regains its ferro-magnetic properties, and is then attracted to the magnet again. However now the nickel alloy wire is back in the flame and starts to heat up again, and the whole process starts all over again! -
2:44Sunflower Heat Engine in Sunlight/How it Works
Sunflower Heat Engine in Sunlight/How it WorksSunflower Heat Engine in Sunlight/How it Works
Sunflower heat engine made from a coffee bag - running in sunlight and how-it-works. The demonstrations in sunlight include a comparison with the petals blackened. Support RimstarOrg on Patreon https://www.patreon.com/user?u=680159 Subscribe for new videos every week http://www.youtube.com/user/rimstarorg?sub_confirmation=1 Go to the main channel page here https://youtube.com/rimstarorg See also: How to Make Sunflower Heat Engine using Coffee Bag https://www.youtube.com/watch?v=m9i3VVd9ISk&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h Corona Motor (v2) or Electrostatic Motor/Atmospheric Motor https://www.youtube.com/watch?v=hpvHRHs7o7I&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h Ball Bearing Motor - How to Make/How it Works https://www.youtube.com/watch?v=DjKhggNJGls&list;=PLFsZmHTZL-zmfXxstlxuJgRE9bOGobEVu Here's my webpage all about this sunflower heat engine: http://rimstar.org/science_electronics_projects/sunflower_heat_engine_with_coffee_bag.htm Inspired by Blade's Sunflower heat engine https://www.youtube.com/watch?v=4ukwkiUOEs8. The use of water glasses was inspired by Lidmotor's video https://www.youtube.com/watch?v=5eruZktfZ5o. Follow behind-the-scenes on: Twitter https://twitter.com/#!/RimStarz Google+ https://plus.google.com/116395125136223897621 Facebook https://www.facebook.com/rimstarorg http://rimstar.org Essence - music by audionautix.com -
6:19Heat Engine Introduction
Heat Engine IntroductionHeat Engine Introduction
Introduction to the Carnot heat engine and the Rankine cycle. Made by faculty at the University of Colorado Boulder, Department of Chemical and Biological Engineering. Check out our Thermodynamics playlists: https://www.youtube.com/user/LearnChemE/playlists?shelf_id=11&view;=50&sort;=dd Are you using a textbook? Check out our website for videos organized by topic and by chapter: http://www.learncheme.com/screencasts/thermodynamics -
10:31Physics Thermodynamics part 14 (Heat Engine) CBSE class 11
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11Physics Thermodynamics part 14 (Heat Engine) CBSE class 11
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11 -
15:55Anti-Heat Engines: Refrigerators, Air Conditioners, and Heat Pumps | Doc Physics
Anti-Heat Engines: Refrigerators, Air Conditioners, and Heat Pumps | Doc PhysicsAnti-Heat Engines: Refrigerators, Air Conditioners, and Heat Pumps | Doc Physics
These three things use input WORK to move heat from cold to hot (which is NOT the way the heat would like to go). -
5:47The Rubber Band Heat Engine
The Rubber Band Heat EngineThe Rubber Band Heat Engine
This is a demonstration called the rubber band heat engine. As the name suggests, you take rubber bands, apply heat to them and they do work for you... just not terribly much of it. But its interesting nonetheless. Video posted for use under Creative Commons Licence - by-nc-sa -
3:10How to Make Sunflower Heat Engine using Coffee Bag
How to Make Sunflower Heat Engine using Coffee BagHow to Make Sunflower Heat Engine using Coffee Bag
How to make a sunflower heat engine using a coffee bag. This one is an unbalanced motor with petals that straighten and curl. Support RimstarOrg on Patreon https://www.patreon.com/user?u=680159 Subscribe for new videos every week http://www.youtube.com/user/rimstarorg?sub_confirmation=1 Go to the main channel page here https://youtube.com/rimstarorg See also: Sunflower Heat Engine Demos/How it Works https://www.youtube.com/watch?v=7yfsx71Cr3c&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h How to Make Corona Motor (v2) aka Electrostatic Motor/Atmospheric Motor https://www.youtube.com/watch?v=9uEjXsX1F14&list;=PL36D7ABECE2AC9666 How to Make Wireless Transmission of Electricity/Joule Thief https://www.youtube.com/watch?v=31Rxi8JMIys&list;=PLFsZmHTZL-zmfXxstlxuJgRE9bOGobEVu Here's my webpage all about this sunflower heat engine: http://rimstar.org/science_electronics_projects/sunflower_heat_engine_with_coffee_bag.htm Inspired by Blade's Sunflower heat engine https://www.youtube.com/watch?v=4ukwkiUOEs8. The use of water glasses was inspired by Lidmotor's video https://www.youtube.com/watch?v=5eruZktfZ5o. Follow behind-the-scenes on: Twitter https://twitter.com/#!/RimStarz Google+ https://plus.google.com/116395125136223897621 Facebook https://www.facebook.com/rimstarorg http://rimstar.org Essence - music by audionautix.com
- Adiabatic process
- Air cycle machine
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-
A Heat Engine Can Use Heat to do Work. But It Can't Be Perfectly Efficient! | Doc Physics
Hero's engine - so simple! -
Heat Engines And Second Law Of Thermodynamics
Follow us at: https://plus.google.com/+tutorvista/ Check us out at http://physics.tutorvista.com/thermodynamics/second-law-of-thermodynamics.html Second Law of Thermodynamics The second law of thermodynamics is an expression of the universal principle of entropy, stating that the entropy of an isolated system which is not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium; and that the entropy change dS of a system undergoing any infinitesimal reversible process is given by δq / T, where δq is the heat supplied to the system and T is the absolute temperature of The second law of thermodynamics The second law of thermodynamics comes in more than one form, but let's state in a way that makes it obviously true, based on what you've observed from sim... -
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Very Simple Heat Engine
This is maybe the simplest heat engine that you can make. It is terribly inefficient, but it works! You only need a few parts in order to put it together. -
Thermodynamics (Physics) Lesson 4 Heat Engines
-
Simple Heat Engine
''Creativity is inventing, experimenting, growing, taking risks, breaking rules, making mistakes and having fun.'' A video assignment given by lecturer to have more understandings about thermodynamics and having fun at the same time! Never stop learning and never stop having fun! :D -
Simple Heat Engine
Video of a homemade heat engine that a student in my conceptual physics course constructed for as a "with honors" project. -
Curie Point Magnetic Heat Engine
Here is a little engine that demonstrates a magnetic property known as the Curie Effect. Normal magnets and also materials which are attracted to magnets (such as iron and nickel) are referred to as ferro-magnetic. The French scientist Pierre Curie discovered that ferro-magnetic materials have a critical temperature, at which they lose their ferro-magnetic behaviour. For example if you heat a piece of iron to 770 degrees Centigrade, which is its Curie Point, the piece of iron loses its ferro-magnetism and is no longer attracted to a magnet. However once the piece of iron cools down to below the Curie Point, it regains its ferro-magnetic behaviour. This little heat engine uses the Curie Effect. A small piece of aluminium wire is suspended from a brass bolt - neither of these two metal... -
Sunflower Heat Engine in Sunlight/How it Works
Sunflower heat engine made from a coffee bag - running in sunlight and how-it-works. The demonstrations in sunlight include a comparison with the petals blackened. Support RimstarOrg on Patreon https://www.patreon.com/user?u=680159 Subscribe for new videos every week http://www.youtube.com/user/rimstarorg?sub_confirmation=1 Go to the main channel page here https://youtube.com/rimstarorg See also: How to Make Sunflower Heat Engine using Coffee Bag https://www.youtube.com/watch?v=m9i3VVd9ISk&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h Corona Motor (v2) or Electrostatic Motor/Atmospheric Motor https://www.youtube.com/watch?v=hpvHRHs7o7I&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h Ball Bearing Motor - How to Make/How it Works https://www.youtube.com/watch?v=DjKhggNJGls&list;=PLFsZmHTZL-zmfXxstlx... -
Heat Engine Introduction
Introduction to the Carnot heat engine and the Rankine cycle. Made by faculty at the University of Colorado Boulder, Department of Chemical and Biological Engineering. Check out our Thermodynamics playlists: https://www.youtube.com/user/LearnChemE/playlists?shelf_id=11&view;=50&sort;=dd Are you using a textbook? Check out our website for videos organized by topic and by chapter: http://www.learncheme.com/screencasts/thermodynamics -
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11 -
Anti-Heat Engines: Refrigerators, Air Conditioners, and Heat Pumps | Doc Physics
These three things use input WORK to move heat from cold to hot (which is NOT the way the heat would like to go). -
The Rubber Band Heat Engine
This is a demonstration called the rubber band heat engine. As the name suggests, you take rubber bands, apply heat to them and they do work for you... just not terribly much of it. But its interesting nonetheless. Video posted for use under Creative Commons Licence - by-nc-sa -
How to Make Sunflower Heat Engine using Coffee Bag
How to make a sunflower heat engine using a coffee bag. This one is an unbalanced motor with petals that straighten and curl. Support RimstarOrg on Patreon https://www.patreon.com/user?u=680159 Subscribe for new videos every week http://www.youtube.com/user/rimstarorg?sub_confirmation=1 Go to the main channel page here https://youtube.com/rimstarorg See also: Sunflower Heat Engine Demos/How it Works https://www.youtube.com/watch?v=7yfsx71Cr3c&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h How to Make Corona Motor (v2) aka Electrostatic Motor/Atmospheric Motor https://www.youtube.com/watch?v=9uEjXsX1F14&list;=PL36D7ABECE2AC9666 How to Make Wireless Transmission of Electricity/Joule Thief https://www.youtube.com/watch?v=31Rxi8JMIys&list;=PLFsZmHTZL-zmfXxstlxuJgRE9bOGobEVu Here's my webpage al... -
Heat Engine
Donate here: http://www.aklectures.com/donate.php Website video link: http://www.aklectures.com/lecture/heat-engine Facebook link: https://www.facebook.com/aklectures Website link: http://www.aklectures.com -
Animation - How stirling engine works.
This is a video animation which explains about the working of a stirling engine. The major components and its working is explained in this animation. Please read the entire article and the video animation to learn about the amazingly designed engine. The Stirling engine is a type of heat engine, its design and efficiency makes it unique. It was invented by Mr. Robert Stirling in 1816. How Stirling engine works video from our own YouTube channel is embedded below, it's a Stirling engine animation video clearly explaining its working. Components of Stirling engine: 1. Rotating disc 2. Engine cylinder 3. Displacer piston 4. Power piston 5. Kerosene or Alcohol burner 6. Links (connecting rotating disc and pistons) Basic working principle for Stirling engine: This engine works with the b... -
WHE - Waste Heat Engine (water lubricated steam powered)
Harry shows off the WHE at the Steam Automobile Club of America meet 2010. Cyclone Power Technologies Waste Heat Engine (WHE, pronounced "we") recaptures heat from external sources to create steam which powers the engine. The WHE models are designed to run a grid-tied or primary electric power generator while producing ZERO Emissions. The WHE is designed to run on heat as low as 500ºF from many different external sources of "wasted" heat such as: * Commercial or small-scale industrial ovens or furnaces * Landfill and industrial gas flares * Engine exhaust -- from vehicles or power generators * Biomass combustion -- dry, vegetative waste materials -
How to make a very Simple heat engine
How to make a very Simple heat engine -
Free Energy Nitinol Heat Machines invented in the early 1970
http://www.overunity.com/12491/air-temp-nitinol This video is about Nitinol memory metal engines that are basically Stirling heat engines and work on a very low temperature difference. This technology can be easily scaled up into the KWatts range and drive a power generator to generate 50 or 60 HZ AC power. If you use solar power via Fresnell lenses to heat the hot water bath you can convert this heat energy into mechanical motion energy and then use a generator to generate 120 Volts 60 Hz AC or 230 Volts 50 Hz AC power. Too bad the oil industry killed this invention also as it did also kill the electric cars ! In this report it is said, that 1 KWatts would require 600 US$ investment for the engine and that it is cheaper than PV and Nuclear power and this was in the 1970s. With todays all... -
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Heat of your hand Stirling Engine
This ultra low temperature-differential Stirling Engine will actually run on the heat of your hand! Place this beautiful precision engine on any warm surface and within a few minutes it's chugging away. The engine runs whenever the temperatures of the top and bottom plates differ by more than about 10 degrees Celsius. Its upper black aluminum plate actually absorbs enough heat in direct sunshine to run on solar power. You can also try a cup of hot coffee, or even your computer monitor! By placing the engine on some ice cubes, it is even possible to drive the engine by the heat of the surrounding air in the room. This is a great thermodynamic demonstration of air pressure change due to alternate heating and cooling. The main chamber has perspex sides, which allow you to see what is happeni... -
Cyclone Waste Heat Engine
http://www.EngineeringTV.com The Cyclone Waste Heat Engine (WHE) is a self-starting engine that operates in a low pressure, low temperature range. This feature allows the engine to run on waste heat emanating from an external source, such as the exhaust from an internal (or external) combustion engine, or the direct burning of biomass (i.e., processing garbage into methane would not be required). The Waste Heat Engine is also designed to run efficiently on solar heat without the installation of costly photovoltaic panels. Commercial applications for the engine include boosting the power and efficiency of large gasoline or diesel-powered generators. When installed to the exhaust system of an engine that can generate over 1000 degrees of heat, the WHE could materially increase overall... -
Nitinol Heat Engine Version 01
For a much better version of this video, click this link for part 2: https://www.youtube.com/watch?v=7a5HJB1-1s4 In part 2 I also give a video response to the negative comments I received in part 1, including the notion that this was simply a waterwheel. How to build and assemble a simple Nitinol Heat Engine. Nitinol, a Shape Shifting Memory Metal Alloy that can produce mechanical energy by simply using a 40 degree temperature variation.
A Heat Engine Can Use Heat to do Work. But It Can't Be Perfectly Efficient! | Doc Physics
- Order: Reorder
- Duration: 12:23
- Updated: 05 Dec 2012
- views: 13603
Hero's engine - so simple!
Hero's engine - so simple!
wn.com/A Heat Engine Can Use Heat To Do Work. But It Can't Be Perfectly Efficient | Doc Physics
Heat Engines And Second Law Of Thermodynamics
- Order: Reorder
- Duration: 4:37
- Updated: 30 Apr 2010
- views: 117510
Follow us at: https://plus.google.com/+tutorvista/
Check us out at http://physics.tutorvista.com/thermodynamics/second-law-of-thermodynamics.html
Second Law ...
Follow us at: https://plus.google.com/+tutorvista/
Check us out at http://physics.tutorvista.com/thermodynamics/second-law-of-thermodynamics.html
Second Law of Thermodynamics
The second law of thermodynamics is an expression of the universal principle of entropy, stating that the entropy of an isolated system which is not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium; and that the entropy change dS of a system undergoing any infinitesimal reversible process is given by δq / T, where δq is the heat supplied to the system and T is the absolute temperature of The second law of thermodynamics
The second law of thermodynamics comes in more than one form, but let's state in a way that makes it obviously true, based on what you've observed from simply being alive.
The second law states that heat flows naturally from regions of higher temperature to regions of lower temperature, but that it will not flow naturally the other way.
Heat can be made to flow from a colder region to a hotter region, which is exactly what happens in an air conditioner, but heat only does this when it is forced. On the other hand, heat flows from hot to cold spontaneously.
Heat engines
We'll move on to look at heat engines, which are devices that use heat to do work. A basic heat engine consists of a gas confined by a piston in a cylinder. If the gas is heated, it expands, moving the piston. This wouldn't be a particularly practical engine, though, because once the gas reaches equilibrium the motion would stop. A practical engine goes through cycles; the piston has to move back and forth. Once the gas is heated, moving the piston up, it can be cooled and the piston will move back down. A cycle of heating and cooling will move the piston up and down.
A necessary component of a heat engine, then, is that two temperatures are involved. At one stage the system is heated, at another it is cooled.
In a full cycle of a heat engine, three things happen:
1.Heat is added. This is at a relatively high temperature, so the heat can be called QH.
2.Some of the energy from that input heat is used to perform work (W).
3.The rest of the heat is removed at a relatively cold temperature (QC).
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wn.com/Heat Engines And Second Law Of Thermodynamics
Follow us at: https://plus.google.com/+tutorvista/
Check us out at http://physics.tutorvista.com/thermodynamics/second-law-of-thermodynamics.html
Second Law of Thermodynamics
The second law of thermodynamics is an expression of the universal principle of entropy, stating that the entropy of an isolated system which is not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium; and that the entropy change dS of a system undergoing any infinitesimal reversible process is given by δq / T, where δq is the heat supplied to the system and T is the absolute temperature of The second law of thermodynamics
The second law of thermodynamics comes in more than one form, but let's state in a way that makes it obviously true, based on what you've observed from simply being alive.
The second law states that heat flows naturally from regions of higher temperature to regions of lower temperature, but that it will not flow naturally the other way.
Heat can be made to flow from a colder region to a hotter region, which is exactly what happens in an air conditioner, but heat only does this when it is forced. On the other hand, heat flows from hot to cold spontaneously.
Heat engines
We'll move on to look at heat engines, which are devices that use heat to do work. A basic heat engine consists of a gas confined by a piston in a cylinder. If the gas is heated, it expands, moving the piston. This wouldn't be a particularly practical engine, though, because once the gas reaches equilibrium the motion would stop. A practical engine goes through cycles; the piston has to move back and forth. Once the gas is heated, moving the piston up, it can be cooled and the piston will move back down. A cycle of heating and cooling will move the piston up and down.
A necessary component of a heat engine, then, is that two temperatures are involved. At one stage the system is heated, at another it is cooled.
In a full cycle of a heat engine, three things happen:
1.Heat is added. This is at a relatively high temperature, so the heat can be called QH.
2.Some of the energy from that input heat is used to perform work (W).
3.The rest of the heat is removed at a relatively cold temperature (QC).
Please like our facebook page
http://www.facebook.com/tutorvista
- published: 30 Apr 2010
- views: 117510
XI_91.Heat Engine
- Order: Reorder
- Duration: 71:27
- Updated: 11 Jan 2013
- views: 17694
Physics, Class XI Chapter :Thermodynamics Topic : Heat Engine Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hindi.
Physics, Class XI Chapter :Thermodynamics Topic : Heat Engine Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hindi.
wn.com/Xi 91.Heat Engine
Very Simple Heat Engine
- Order: Reorder
- Duration: 4:07
- Updated: 30 Mar 2015
- views: 8209
This is maybe the simplest heat engine that you can make. It is terribly inefficient, but it works! You only need a few parts in order to put it together.
This is maybe the simplest heat engine that you can make. It is terribly inefficient, but it works! You only need a few parts in order to put it together.
wn.com/Very Simple Heat Engine
This is maybe the simplest heat engine that you can make. It is terribly inefficient, but it works! You only need a few parts in order to put it together.
- published: 30 Mar 2015
- views: 8209
Thermodynamics (Physics) Lesson 4 Heat Engines
- Order: Reorder
- Duration: 11:38
- Updated: 04 Feb 2012
- views: 12532
- published: 04 Feb 2012
- views: 12532
Simple Heat Engine
- Order: Reorder
- Duration: 4:52
- Updated: 06 May 2014
- views: 5247
''Creativity is inventing, experimenting, growing, taking risks, breaking rules, making mistakes and having fun.'' A video assignment given by lecturer to have ...
''Creativity is inventing, experimenting, growing, taking risks, breaking rules, making mistakes and having fun.'' A video assignment given by lecturer to have more understandings about thermodynamics and having fun at the same time! Never stop learning and never stop having fun! :D
wn.com/Simple Heat Engine
''Creativity is inventing, experimenting, growing, taking risks, breaking rules, making mistakes and having fun.'' A video assignment given by lecturer to have more understandings about thermodynamics and having fun at the same time! Never stop learning and never stop having fun! :D
- published: 06 May 2014
- views: 5247
Simple Heat Engine
- Order: Reorder
- Duration: 0:38
- Updated: 14 Jan 2010
- views: 286578
Video of a homemade heat engine that a student in my conceptual physics course constructed for as a "with honors" project.
Video of a homemade heat engine that a student in my conceptual physics course constructed for as a "with honors" project.
wn.com/Simple Heat Engine
Video of a homemade heat engine that a student in my conceptual physics course constructed for as a "with honors" project.
- published: 14 Jan 2010
- views: 286578
Curie Point Magnetic Heat Engine
- Order: Reorder
- Duration: 2:15
- Updated: 20 Mar 2014
- views: 127665
Here is a little engine that demonstrates a magnetic property known as the Curie Effect.
Normal magnets and also materials which are attracted to magnets (su...
Here is a little engine that demonstrates a magnetic property known as the Curie Effect.
Normal magnets and also materials which are attracted to magnets (such as iron and nickel) are referred to as ferro-magnetic. The French scientist Pierre Curie discovered that ferro-magnetic materials have a critical temperature, at which they lose their ferro-magnetic behaviour. For example if you heat a piece of iron to 770 degrees Centigrade, which is its Curie Point, the piece of iron loses its ferro-magnetism and is no longer attracted to a magnet. However once the piece of iron cools down to below the Curie Point, it regains its ferro-magnetic behaviour.
This little heat engine uses the Curie Effect. A small piece of aluminium wire is suspended from a brass bolt - neither of these two metals are ferro-magnetic. However at the end of the aluminium wire is a little loop of nickel alloy wire, which is ferro-magnetic, and which has a very low Curie Point.
Normally the loop of nickel alloy is attracted by the strong neodymium magnet, which is placed at one side. So the default position of the aluminium wire is at an angle of about 45 degrees, attracted by the neodymium magnet, although the wire is not long enough for the loop of nickel alloy to actually make contact with the magnet.
However when you then light the candle, the little motor comes to life. While the loop of nickel alloy is pulled towards the magnet, it will be in the flame from the candle, and will be heated. Once the loop of wire reaches the Curie Point, it loses its ferro-magnetic properties, in other words it is no longer attracted to the neodymium magnet, and the wire now reverts to hanging straight down.
The loop of nickel alloy is now out of the candle flame, and starts to cool down. As soon as it falls below the Curie Point, it regains its ferro-magnetic properties, and is then attracted to the magnet again. However now the nickel alloy wire is back in the flame and starts to heat up again, and the whole process starts all over again!
wn.com/Curie Point Magnetic Heat Engine
Here is a little engine that demonstrates a magnetic property known as the Curie Effect.
Normal magnets and also materials which are attracted to magnets (such as iron and nickel) are referred to as ferro-magnetic. The French scientist Pierre Curie discovered that ferro-magnetic materials have a critical temperature, at which they lose their ferro-magnetic behaviour. For example if you heat a piece of iron to 770 degrees Centigrade, which is its Curie Point, the piece of iron loses its ferro-magnetism and is no longer attracted to a magnet. However once the piece of iron cools down to below the Curie Point, it regains its ferro-magnetic behaviour.
This little heat engine uses the Curie Effect. A small piece of aluminium wire is suspended from a brass bolt - neither of these two metals are ferro-magnetic. However at the end of the aluminium wire is a little loop of nickel alloy wire, which is ferro-magnetic, and which has a very low Curie Point.
Normally the loop of nickel alloy is attracted by the strong neodymium magnet, which is placed at one side. So the default position of the aluminium wire is at an angle of about 45 degrees, attracted by the neodymium magnet, although the wire is not long enough for the loop of nickel alloy to actually make contact with the magnet.
However when you then light the candle, the little motor comes to life. While the loop of nickel alloy is pulled towards the magnet, it will be in the flame from the candle, and will be heated. Once the loop of wire reaches the Curie Point, it loses its ferro-magnetic properties, in other words it is no longer attracted to the neodymium magnet, and the wire now reverts to hanging straight down.
The loop of nickel alloy is now out of the candle flame, and starts to cool down. As soon as it falls below the Curie Point, it regains its ferro-magnetic properties, and is then attracted to the magnet again. However now the nickel alloy wire is back in the flame and starts to heat up again, and the whole process starts all over again!
- published: 20 Mar 2014
- views: 127665
Sunflower Heat Engine in Sunlight/How it Works
- Order: Reorder
- Duration: 2:44
- Updated: 28 Aug 2015
- views: 6883
Sunflower heat engine made from a coffee bag - running in sunlight and how-it-works. The demonstrations in sunlight include a comparison with the petals blacken...
Sunflower heat engine made from a coffee bag - running in sunlight and how-it-works. The demonstrations in sunlight include a comparison with the petals blackened.
Support RimstarOrg on Patreon https://www.patreon.com/user?u=680159
Subscribe for new videos every week http://www.youtube.com/user/rimstarorg?sub_confirmation=1
Go to the main channel page here https://youtube.com/rimstarorg
See also:
How to Make Sunflower Heat Engine using Coffee Bag
https://www.youtube.com/watch?v=m9i3VVd9ISk&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h
Corona Motor (v2) or Electrostatic Motor/Atmospheric Motor
https://www.youtube.com/watch?v=hpvHRHs7o7I&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h
Ball Bearing Motor - How to Make/How it Works
https://www.youtube.com/watch?v=DjKhggNJGls&list;=PLFsZmHTZL-zmfXxstlxuJgRE9bOGobEVu
Here's my webpage all about this sunflower heat engine:
http://rimstar.org/science_electronics_projects/sunflower_heat_engine_with_coffee_bag.htm
Inspired by Blade's Sunflower heat engine https://www.youtube.com/watch?v=4ukwkiUOEs8. The use of water glasses was inspired by Lidmotor's video https://www.youtube.com/watch?v=5eruZktfZ5o.
Follow behind-the-scenes on:
Twitter https://twitter.com/#!/RimStarz
Google+ https://plus.google.com/116395125136223897621
Facebook https://www.facebook.com/rimstarorg
http://rimstar.org
Essence - music by audionautix.com
wn.com/Sunflower Heat Engine In Sunlight How It Works
Sunflower heat engine made from a coffee bag - running in sunlight and how-it-works. The demonstrations in sunlight include a comparison with the petals blackened.
Support RimstarOrg on Patreon https://www.patreon.com/user?u=680159
Subscribe for new videos every week http://www.youtube.com/user/rimstarorg?sub_confirmation=1
Go to the main channel page here https://youtube.com/rimstarorg
See also:
How to Make Sunflower Heat Engine using Coffee Bag
https://www.youtube.com/watch?v=m9i3VVd9ISk&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h
Corona Motor (v2) or Electrostatic Motor/Atmospheric Motor
https://www.youtube.com/watch?v=hpvHRHs7o7I&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h
Ball Bearing Motor - How to Make/How it Works
https://www.youtube.com/watch?v=DjKhggNJGls&list;=PLFsZmHTZL-zmfXxstlxuJgRE9bOGobEVu
Here's my webpage all about this sunflower heat engine:
http://rimstar.org/science_electronics_projects/sunflower_heat_engine_with_coffee_bag.htm
Inspired by Blade's Sunflower heat engine https://www.youtube.com/watch?v=4ukwkiUOEs8. The use of water glasses was inspired by Lidmotor's video https://www.youtube.com/watch?v=5eruZktfZ5o.
Follow behind-the-scenes on:
Twitter https://twitter.com/#!/RimStarz
Google+ https://plus.google.com/116395125136223897621
Facebook https://www.facebook.com/rimstarorg
http://rimstar.org
Essence - music by audionautix.com
- published: 28 Aug 2015
- views: 6883
Heat Engine Introduction
- Order: Reorder
- Duration: 6:19
- Updated: 15 Mar 2012
- views: 14480
Introduction to the Carnot heat engine and the Rankine cycle. Made by faculty at the University of Colorado Boulder, Department of Chemical and Biological Engin...
Introduction to the Carnot heat engine and the Rankine cycle. Made by faculty at the University of Colorado Boulder, Department of Chemical and Biological Engineering.
Check out our Thermodynamics playlists: https://www.youtube.com/user/LearnChemE/playlists?shelf_id=11&view;=50&sort;=dd
Are you using a textbook? Check out our website for videos organized by topic and by chapter: http://www.learncheme.com/screencasts/thermodynamics
wn.com/Heat Engine Introduction
Introduction to the Carnot heat engine and the Rankine cycle. Made by faculty at the University of Colorado Boulder, Department of Chemical and Biological Engineering.
Check out our Thermodynamics playlists: https://www.youtube.com/user/LearnChemE/playlists?shelf_id=11&view;=50&sort;=dd
Are you using a textbook? Check out our website for videos organized by topic and by chapter: http://www.learncheme.com/screencasts/thermodynamics
- published: 15 Mar 2012
- views: 14480
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11
- Order: Reorder
- Duration: 10:31
- Updated: 22 Apr 2012
- views: 13225
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11
wn.com/Physics Thermodynamics Part 14 (Heat Engine) Cbse Class 11
Anti-Heat Engines: Refrigerators, Air Conditioners, and Heat Pumps | Doc Physics
- Order: Reorder
- Duration: 15:55
- Updated: 06 Dec 2012
- views: 31131
These three things use input WORK to move heat from cold to hot (which is NOT the way the heat would like to go).
These three things use input WORK to move heat from cold to hot (which is NOT the way the heat would like to go).
wn.com/Anti Heat Engines Refrigerators, Air Conditioners, And Heat Pumps | Doc Physics
These three things use input WORK to move heat from cold to hot (which is NOT the way the heat would like to go).
- published: 06 Dec 2012
- views: 31131
The Rubber Band Heat Engine
- Order: Reorder
- Duration: 5:47
- Updated: 06 Sep 2008
- views: 106416
This is a demonstration called the rubber band heat engine. As the name suggests, you take rubber bands, apply heat to them and they do work for you... just not...
This is a demonstration called the rubber band heat engine. As the name suggests, you take rubber bands, apply heat to them and they do work for you... just not terribly much of it. But its interesting nonetheless.
Video posted for use under Creative Commons Licence - by-nc-sa
wn.com/The Rubber Band Heat Engine
This is a demonstration called the rubber band heat engine. As the name suggests, you take rubber bands, apply heat to them and they do work for you... just not terribly much of it. But its interesting nonetheless.
Video posted for use under Creative Commons Licence - by-nc-sa
- published: 06 Sep 2008
- views: 106416
How to Make Sunflower Heat Engine using Coffee Bag
- Order: Reorder
- Duration: 3:10
- Updated: 21 Aug 2015
- views: 11801
How to make a sunflower heat engine using a coffee bag. This one is an unbalanced motor with petals that straighten and curl.
Support RimstarOrg on Patreon htt...
How to make a sunflower heat engine using a coffee bag. This one is an unbalanced motor with petals that straighten and curl.
Support RimstarOrg on Patreon https://www.patreon.com/user?u=680159
Subscribe for new videos every week http://www.youtube.com/user/rimstarorg?sub_confirmation=1
Go to the main channel page here https://youtube.com/rimstarorg
See also:
Sunflower Heat Engine Demos/How it Works
https://www.youtube.com/watch?v=7yfsx71Cr3c&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h
How to Make Corona Motor (v2) aka Electrostatic Motor/Atmospheric Motor
https://www.youtube.com/watch?v=9uEjXsX1F14&list;=PL36D7ABECE2AC9666
How to Make Wireless Transmission of Electricity/Joule Thief
https://www.youtube.com/watch?v=31Rxi8JMIys&list;=PLFsZmHTZL-zmfXxstlxuJgRE9bOGobEVu
Here's my webpage all about this sunflower heat engine:
http://rimstar.org/science_electronics_projects/sunflower_heat_engine_with_coffee_bag.htm
Inspired by Blade's Sunflower heat engine https://www.youtube.com/watch?v=4ukwkiUOEs8. The use of water glasses was inspired by Lidmotor's video https://www.youtube.com/watch?v=5eruZktfZ5o.
Follow behind-the-scenes on:
Twitter https://twitter.com/#!/RimStarz
Google+ https://plus.google.com/116395125136223897621
Facebook https://www.facebook.com/rimstarorg
http://rimstar.org
Essence - music by audionautix.com
wn.com/How To Make Sunflower Heat Engine Using Coffee Bag
How to make a sunflower heat engine using a coffee bag. This one is an unbalanced motor with petals that straighten and curl.
Support RimstarOrg on Patreon https://www.patreon.com/user?u=680159
Subscribe for new videos every week http://www.youtube.com/user/rimstarorg?sub_confirmation=1
Go to the main channel page here https://youtube.com/rimstarorg
See also:
Sunflower Heat Engine Demos/How it Works
https://www.youtube.com/watch?v=7yfsx71Cr3c&list;=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h
How to Make Corona Motor (v2) aka Electrostatic Motor/Atmospheric Motor
https://www.youtube.com/watch?v=9uEjXsX1F14&list;=PL36D7ABECE2AC9666
How to Make Wireless Transmission of Electricity/Joule Thief
https://www.youtube.com/watch?v=31Rxi8JMIys&list;=PLFsZmHTZL-zmfXxstlxuJgRE9bOGobEVu
Here's my webpage all about this sunflower heat engine:
http://rimstar.org/science_electronics_projects/sunflower_heat_engine_with_coffee_bag.htm
Inspired by Blade's Sunflower heat engine https://www.youtube.com/watch?v=4ukwkiUOEs8. The use of water glasses was inspired by Lidmotor's video https://www.youtube.com/watch?v=5eruZktfZ5o.
Follow behind-the-scenes on:
Twitter https://twitter.com/#!/RimStarz
Google+ https://plus.google.com/116395125136223897621
Facebook https://www.facebook.com/rimstarorg
http://rimstar.org
Essence - music by audionautix.com
- published: 21 Aug 2015
- views: 11801
Heat Engine
- Order: Reorder
- Duration: 9:39
- Updated: 08 Nov 2013
- views: 3494
Donate here: http://www.aklectures.com/donate.php
Website video link: http://www.aklectures.com/lecture/heat-engine
Facebook link: https://www.facebook.com/akle...
Donate here: http://www.aklectures.com/donate.php
Website video link: http://www.aklectures.com/lecture/heat-engine
Facebook link: https://www.facebook.com/aklectures
Website link: http://www.aklectures.com
wn.com/Heat Engine
Donate here: http://www.aklectures.com/donate.php
Website video link: http://www.aklectures.com/lecture/heat-engine
Facebook link: https://www.facebook.com/aklectures
Website link: http://www.aklectures.com
- published: 08 Nov 2013
- views: 3494
Animation - How stirling engine works.
- Order: Reorder
- Duration: 6:23
- Updated: 15 Jan 2014
- views: 52284
This is a video animation which explains about the working of a stirling engine. The major components and its working is explained in this animation.
Please r...
This is a video animation which explains about the working of a stirling engine. The major components and its working is explained in this animation.
Please read the entire article and the video animation to learn about the amazingly designed engine.
The Stirling engine is a type of heat engine, its design and efficiency makes it unique. It was invented by Mr. Robert Stirling in 1816.
How Stirling engine works video from our own YouTube channel is embedded below, it's a Stirling engine animation video clearly explaining its working.
Components of Stirling engine:
1. Rotating disc
2. Engine cylinder
3. Displacer piston
4. Power piston
5. Kerosene or Alcohol burner
6. Links (connecting rotating disc and pistons)
Basic working principle for Stirling engine:
This engine works with the basic principle of expansion and compression of gas when heated and cooled.
How Stirling engine works in detail:
1. Working of displacer piston.
As shown in the figure on the left side of the displacer piston, the air will be hot as kerosene burner is heating it and the right side of the displacer piston air is cold. The hotter region, as the air expands. It exerts a pressure on to the displacer piston resulting in it to move. When the displacer piston gets displaced, due to this the colder air at the left side gets pumped up to the right side through the clearance at top and bottom of the displacer piston (see the video animation). This cycle continuous and the displacer piston displaced the hot and the cold air continuously. The hot air moving to the rear (right) gets cooler and the cold air moving to the front (left) gets heated up. Thus the function of the displacer piston is to move the gas from both the ends (hot to cold and cold to hot)
2. Working of power piston.
The power piston moves and adjusts the internal gas volume as the displacer piston and gas moves. During this movement, it absorbs the power and gives it to the rotating disc. That's why it's called power piston.
3. How links and disc works.
The links and disc's works together with the displacer and power pistons. The displacer and power piston and independently connected to different links which are intern connected to the rotating disc.
4. Working of Kerosene or Alcohol burner.
Its function is to heat the air at the front end of the displacer piston.
You can also have a look at the below video to get a clarity on its working. Engineering and school students can make working model of Stirling engine as a part of their academic projects. It will be a great learning experience. If you want any help feel free to drop a comment to reach out to us.
More topics on Stirling engine like Stirling engine efficiency derivation, Stirling engine efficiency calculation will be published shortly.
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wn.com/Animation How Stirling Engine Works.
This is a video animation which explains about the working of a stirling engine. The major components and its working is explained in this animation.
Please read the entire article and the video animation to learn about the amazingly designed engine.
The Stirling engine is a type of heat engine, its design and efficiency makes it unique. It was invented by Mr. Robert Stirling in 1816.
How Stirling engine works video from our own YouTube channel is embedded below, it's a Stirling engine animation video clearly explaining its working.
Components of Stirling engine:
1. Rotating disc
2. Engine cylinder
3. Displacer piston
4. Power piston
5. Kerosene or Alcohol burner
6. Links (connecting rotating disc and pistons)
Basic working principle for Stirling engine:
This engine works with the basic principle of expansion and compression of gas when heated and cooled.
How Stirling engine works in detail:
1. Working of displacer piston.
As shown in the figure on the left side of the displacer piston, the air will be hot as kerosene burner is heating it and the right side of the displacer piston air is cold. The hotter region, as the air expands. It exerts a pressure on to the displacer piston resulting in it to move. When the displacer piston gets displaced, due to this the colder air at the left side gets pumped up to the right side through the clearance at top and bottom of the displacer piston (see the video animation). This cycle continuous and the displacer piston displaced the hot and the cold air continuously. The hot air moving to the rear (right) gets cooler and the cold air moving to the front (left) gets heated up. Thus the function of the displacer piston is to move the gas from both the ends (hot to cold and cold to hot)
2. Working of power piston.
The power piston moves and adjusts the internal gas volume as the displacer piston and gas moves. During this movement, it absorbs the power and gives it to the rotating disc. That's why it's called power piston.
3. How links and disc works.
The links and disc's works together with the displacer and power pistons. The displacer and power piston and independently connected to different links which are intern connected to the rotating disc.
4. Working of Kerosene or Alcohol burner.
Its function is to heat the air at the front end of the displacer piston.
You can also have a look at the below video to get a clarity on its working. Engineering and school students can make working model of Stirling engine as a part of their academic projects. It will be a great learning experience. If you want any help feel free to drop a comment to reach out to us.
More topics on Stirling engine like Stirling engine efficiency derivation, Stirling engine efficiency calculation will be published shortly.
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- published: 15 Jan 2014
- views: 52284
WHE - Waste Heat Engine (water lubricated steam powered)
- Order: Reorder
- Duration: 1:29
- Updated: 15 Nov 2010
- views: 58484
Harry shows off the WHE at the Steam Automobile Club of America meet 2010.
Cyclone Power Technologies Waste Heat Engine (WHE, pronounced "we") recaptures hea...
Harry shows off the WHE at the Steam Automobile Club of America meet 2010.
Cyclone Power Technologies Waste Heat Engine (WHE, pronounced "we") recaptures heat from external sources to create steam which powers the engine. The WHE models are designed to run a grid-tied or primary electric power generator while producing ZERO Emissions.
The WHE is designed to run on heat as low as 500ºF from many different external sources of "wasted" heat such as:
* Commercial or small-scale industrial ovens or furnaces
* Landfill and industrial gas flares
* Engine exhaust -- from vehicles or power generators
* Biomass combustion -- dry, vegetative waste materials
wn.com/Whe Waste Heat Engine (Water Lubricated Steam Powered)
Harry shows off the WHE at the Steam Automobile Club of America meet 2010.
Cyclone Power Technologies Waste Heat Engine (WHE, pronounced "we") recaptures heat from external sources to create steam which powers the engine. The WHE models are designed to run a grid-tied or primary electric power generator while producing ZERO Emissions.
The WHE is designed to run on heat as low as 500ºF from many different external sources of "wasted" heat such as:
* Commercial or small-scale industrial ovens or furnaces
* Landfill and industrial gas flares
* Engine exhaust -- from vehicles or power generators
* Biomass combustion -- dry, vegetative waste materials
- published: 15 Nov 2010
- views: 58484
How to make a very Simple heat engine
- Order: Reorder
- Duration: 3:16
- Updated: 04 Dec 2015
- views: 1074
How to make a very Simple heat engine
How to make a very Simple heat engine
wn.com/How To Make A Very Simple Heat Engine
Free Energy Nitinol Heat Machines invented in the early 1970
- Order: Reorder
- Duration: 14:34
- Updated: 19 Mar 2012
- views: 839517
http://www.overunity.com/12491/air-temp-nitinol
This video is about Nitinol memory metal engines that are basically Stirling heat engines and work on a very low...
http://www.overunity.com/12491/air-temp-nitinol
This video is about Nitinol memory metal engines that are basically Stirling heat engines and work on a very low temperature difference.
This technology can be easily scaled up into the KWatts range and drive a power generator to generate 50 or 60 HZ AC power. If you use solar power via Fresnell lenses to heat the hot water bath you can convert this heat energy into mechanical motion energy and then use a generator to generate 120 Volts 60 Hz AC or 230 Volts 50 Hz AC power.
Too bad the oil industry killed this invention also as it did also kill the electric cars !
In this report it is said, that 1 KWatts would require 600 US$ investment for the engine and that it is cheaper than PV and Nuclear power and this was in the 1970s. With todays alloy technology this price could be dropped dramatically and this would be a very cost effective technology.
Also Nickel and Titan metals are not rare metals and it would be
cheap to manufature without much maintainance...
but Big Oil killed this technology long ago... What a shame... !
Original video was found here:
http://www.youtube.com/watch?v=ZoAFc_DeWVQ
It was a major threat to the oil barons as is proved in this documentary. So where is all of this hidden technology now?
Prize winning 1982 CNN report by science editor Kevin Sanders:
http://www.warpeace.org/staticpages/index.php/sanders
His follow-up articles on Nitinol in Science Digest are here:
http://www.colorsproject.com/nitinol_articles_science_digest_1982_sanders.pdf
Update article on Nitinol Engines by Ridgeway Banks:
http://www.winstonbrill.com/bril001/html/article_index/articles1_50.html
Free Energy and Free Thinking
http://www.feandft.com/
Regards, Stefan.
Here some more keywords for the advertising ads :
HHO
Water
runs on water
save fuel
HHO car
watercar
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H2
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gas
fuel
Save
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Iphone
Android
Ipad
Ipod
travel
insurance
jewelry
makeup
jewels
watch
watches
shoes
fashion
shoe
price check
preisvergleich
shopping
shop
-~-~~-~~~-~~-~-
Please watch: "Free Energy Machine ? Scam ? from Witts.ws - QEG ? Scam ? inspired model ?"
➨ https://www.youtube.com/watch?v=Y1BInIh_mRQ
-~-~~-~~~-~~-~- Please watch: "OPV Solar Cell - DTU Organic Solarcell - Free Plastic Organic Solar Cells - first test"
➨ https://www.youtube.com/watch?v=EuhDTaLBGq0 Future Tech:: "FREE ENERGY DEVICE - AKULA Blue LED Light Generator"
➨ https://www.youtube.com/watch?v=6cSXYeGsO9o Akula FREE ENERGY DEVICE - Akula Lantern Circuit number 4
➨ https://www.youtube.com/watch?v=DnuXqnTlJNM -----------------------------------
Please watch: "Hydrogen compressed H2 and O2 gas separator split cell by Stefan Hartmann"
➨ https://www.youtube.com/watch?v=AikUjB2WXgs Please watch: "Orbo Webinar 2 - Steorn Orbo Ophone OCube and Powercell presentations"
➨ https://www.youtube.com/watch?v=hp_pbV9-Yvo ---------------
Shop Amazon - Contract Cell Phones & Service Plans
http://bit.ly/smartphone-offers
---------------------------------------------------
Try Audible and Get Two Free Audiobooks:
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------------------------------------------------------------
Join Amazon Prime Music. 30-day Free Trial !
http://bit.ly/amazon-prime-music-offer
wn.com/Free Energy Nitinol Heat Machines Invented In The Early 1970
http://www.overunity.com/12491/air-temp-nitinol
This video is about Nitinol memory metal engines that are basically Stirling heat engines and work on a very low temperature difference.
This technology can be easily scaled up into the KWatts range and drive a power generator to generate 50 or 60 HZ AC power. If you use solar power via Fresnell lenses to heat the hot water bath you can convert this heat energy into mechanical motion energy and then use a generator to generate 120 Volts 60 Hz AC or 230 Volts 50 Hz AC power.
Too bad the oil industry killed this invention also as it did also kill the electric cars !
In this report it is said, that 1 KWatts would require 600 US$ investment for the engine and that it is cheaper than PV and Nuclear power and this was in the 1970s. With todays alloy technology this price could be dropped dramatically and this would be a very cost effective technology.
Also Nickel and Titan metals are not rare metals and it would be
cheap to manufature without much maintainance...
but Big Oil killed this technology long ago... What a shame... !
Original video was found here:
http://www.youtube.com/watch?v=ZoAFc_DeWVQ
It was a major threat to the oil barons as is proved in this documentary. So where is all of this hidden technology now?
Prize winning 1982 CNN report by science editor Kevin Sanders:
http://www.warpeace.org/staticpages/index.php/sanders
His follow-up articles on Nitinol in Science Digest are here:
http://www.colorsproject.com/nitinol_articles_science_digest_1982_sanders.pdf
Update article on Nitinol Engines by Ridgeway Banks:
http://www.winstonbrill.com/bril001/html/article_index/articles1_50.html
Free Energy and Free Thinking
http://www.feandft.com/
Regards, Stefan.
Here some more keywords for the advertising ads :
HHO
Water
runs on water
save fuel
HHO car
watercar
water splitting
H2
O2
oxyhydrogen
hydroxy
gas
fuel
Save
environment
computer
gadgets
tablet pc
Iphone
Android
Ipad
Ipod
travel
insurance
jewelry
makeup
jewels
watch
watches
shoes
fashion
shoe
price check
preisvergleich
shopping
shop
-~-~~-~~~-~~-~-
Please watch: "Free Energy Machine ? Scam ? from Witts.ws - QEG ? Scam ? inspired model ?"
➨ https://www.youtube.com/watch?v=Y1BInIh_mRQ
-~-~~-~~~-~~-~- Please watch: "OPV Solar Cell - DTU Organic Solarcell - Free Plastic Organic Solar Cells - first test"
➨ https://www.youtube.com/watch?v=EuhDTaLBGq0 Future Tech:: "FREE ENERGY DEVICE - AKULA Blue LED Light Generator"
➨ https://www.youtube.com/watch?v=6cSXYeGsO9o Akula FREE ENERGY DEVICE - Akula Lantern Circuit number 4
➨ https://www.youtube.com/watch?v=DnuXqnTlJNM -----------------------------------
Please watch: "Hydrogen compressed H2 and O2 gas separator split cell by Stefan Hartmann"
➨ https://www.youtube.com/watch?v=AikUjB2WXgs Please watch: "Orbo Webinar 2 - Steorn Orbo Ophone OCube and Powercell presentations"
➨ https://www.youtube.com/watch?v=hp_pbV9-Yvo ---------------
Shop Amazon - Contract Cell Phones & Service Plans
http://bit.ly/smartphone-offers
---------------------------------------------------
Try Audible and Get Two Free Audiobooks:
http://bit.ly/audible-2free-audiobooks
------------------------------------------------------------
Join Amazon Prime Music. 30-day Free Trial !
http://bit.ly/amazon-prime-music-offer
- published: 19 Mar 2012
- views: 839517
XI-12-3 Heat Engine (2015) Pradeep Kshetrapal Physics
- Order: Reorder
- Duration: 73:37
- Updated: 19 Dec 2015
- views: 1111
Physics, Class XI Chapter :THERMODYNAMICS Topic: Heat Engine Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hindi.
Physics, Class XI Chapter :THERMODYNAMICS Topic: Heat Engine Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hindi.
wn.com/Xi 12 3 Heat Engine (2015) Pradeep Kshetrapal Physics
Heat of your hand Stirling Engine
- Order: Reorder
- Duration: 1:56
- Updated: 02 Mar 2012
- views: 413787
This ultra low temperature-differential Stirling Engine will actually run on the heat of your hand! Place this beautiful precision engine on any warm surface an...
This ultra low temperature-differential Stirling Engine will actually run on the heat of your hand! Place this beautiful precision engine on any warm surface and within a few minutes it's chugging away. The engine runs whenever the temperatures of the top and bottom plates differ by more than about 10 degrees Celsius. Its upper black aluminum plate actually absorbs enough heat in direct sunshine to run on solar power. You can also try a cup of hot coffee, or even your computer monitor! By placing the engine on some ice cubes, it is even possible to drive the engine by the heat of the surrounding air in the room.
This is a great thermodynamic demonstration of air pressure change due to alternate heating and cooling. The main chamber has perspex sides, which allow you to see what is happening inside. When the large foam displacer (it is not a piston) moves up, the air is then in contact with the lower (warmer) plate, and the air expands. This drives the small piston in the centre of the top plate upwards. The displacer then moves down, causing the air to now be in contact with the upper (colder) plate. The air now cools and contracts, which causes the small piston to move down. As long as there is a temperature differential of over 10 degrees, your Stirling Engine will keep going!
This is not a kit - it comes fully assembled and ready to go.
http://www.grand-illusions.com/acatalog/Heat_of_your_hand_Stirling_Engine.html
wn.com/Heat Of Your Hand Stirling Engine
This ultra low temperature-differential Stirling Engine will actually run on the heat of your hand! Place this beautiful precision engine on any warm surface and within a few minutes it's chugging away. The engine runs whenever the temperatures of the top and bottom plates differ by more than about 10 degrees Celsius. Its upper black aluminum plate actually absorbs enough heat in direct sunshine to run on solar power. You can also try a cup of hot coffee, or even your computer monitor! By placing the engine on some ice cubes, it is even possible to drive the engine by the heat of the surrounding air in the room.
This is a great thermodynamic demonstration of air pressure change due to alternate heating and cooling. The main chamber has perspex sides, which allow you to see what is happening inside. When the large foam displacer (it is not a piston) moves up, the air is then in contact with the lower (warmer) plate, and the air expands. This drives the small piston in the centre of the top plate upwards. The displacer then moves down, causing the air to now be in contact with the upper (colder) plate. The air now cools and contracts, which causes the small piston to move down. As long as there is a temperature differential of over 10 degrees, your Stirling Engine will keep going!
This is not a kit - it comes fully assembled and ready to go.
http://www.grand-illusions.com/acatalog/Heat_of_your_hand_Stirling_Engine.html
- published: 02 Mar 2012
- views: 413787
Cyclone Waste Heat Engine
- Order: Reorder
- Duration: 6:00
- Updated: 18 Mar 2011
- views: 19336
http://www.EngineeringTV.com
The Cyclone Waste Heat Engine (WHE) is a self-starting engine that operates in a low pressure, low temperature range. This feat...
http://www.EngineeringTV.com
The Cyclone Waste Heat Engine (WHE) is a self-starting engine that operates in a low pressure, low temperature range. This feature allows the engine to run on waste heat emanating from an external source, such as the exhaust from an internal (or external) combustion engine, or the direct burning of biomass (i.e., processing garbage into methane would not be required). The Waste Heat Engine is also designed to run efficiently on solar heat without the installation of costly photovoltaic panels. Commercial applications for the engine include boosting the power and efficiency of large gasoline or diesel-powered generators. When installed to the exhaust system of an engine that can generate over 1000 degrees of heat, the WHE could materially increase overall horsepower and reduce fuel consumption. Additionally, once installed, the Waste Heat Engine could serve as a stand-by generator should the primary system shut down. Another major commercial application includes solar-power generators for homes or businesses. By attaching inexpensive panels to a roof, enough heat can be produced to run the Waste Heat Engine. Cyclone believes that such a system could be installed at a price of approximately 20% of the cost of comparable photovoltaic panel systems, while also providing home owners with a back-up power supply. Excess electricity could be directed back to the power grid for electrical power credits.
Hosted by: Lee Teschler
Videography by: Curtis Ellzey
Edited by: Curtis Ellzey
wn.com/Cyclone Waste Heat Engine
http://www.EngineeringTV.com
The Cyclone Waste Heat Engine (WHE) is a self-starting engine that operates in a low pressure, low temperature range. This feature allows the engine to run on waste heat emanating from an external source, such as the exhaust from an internal (or external) combustion engine, or the direct burning of biomass (i.e., processing garbage into methane would not be required). The Waste Heat Engine is also designed to run efficiently on solar heat without the installation of costly photovoltaic panels. Commercial applications for the engine include boosting the power and efficiency of large gasoline or diesel-powered generators. When installed to the exhaust system of an engine that can generate over 1000 degrees of heat, the WHE could materially increase overall horsepower and reduce fuel consumption. Additionally, once installed, the Waste Heat Engine could serve as a stand-by generator should the primary system shut down. Another major commercial application includes solar-power generators for homes or businesses. By attaching inexpensive panels to a roof, enough heat can be produced to run the Waste Heat Engine. Cyclone believes that such a system could be installed at a price of approximately 20% of the cost of comparable photovoltaic panel systems, while also providing home owners with a back-up power supply. Excess electricity could be directed back to the power grid for electrical power credits.
Hosted by: Lee Teschler
Videography by: Curtis Ellzey
Edited by: Curtis Ellzey
- published: 18 Mar 2011
- views: 19336
Nitinol Heat Engine Version 01
- Order: Reorder
- Duration: 4:56
- Updated: 27 May 2013
- views: 66575
For a much better version of this video, click this link for part 2: https://www.youtube.com/watch?v=7a5HJB1-1s4
In part 2 I also give a video response to the n...
For a much better version of this video, click this link for part 2: https://www.youtube.com/watch?v=7a5HJB1-1s4
In part 2 I also give a video response to the negative comments I received in part 1, including the notion that this was simply a waterwheel.
How to build and assemble a simple Nitinol Heat Engine. Nitinol, a Shape Shifting Memory Metal Alloy that can produce mechanical energy by simply using a 40 degree temperature variation.
wn.com/Nitinol Heat Engine Version 01
For a much better version of this video, click this link for part 2: https://www.youtube.com/watch?v=7a5HJB1-1s4
In part 2 I also give a video response to the negative comments I received in part 1, including the notion that this was simply a waterwheel.
How to build and assemble a simple Nitinol Heat Engine. Nitinol, a Shape Shifting Memory Metal Alloy that can produce mechanical energy by simply using a 40 degree temperature variation.
- published: 27 May 2013
- views: 66575
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12:23
A Heat Engine Can Use Heat to do Work. But It Can't Be Perfectly Efficient! | Doc Physics
Hero's engine - so simple!
published: 05 Dec 2012
A Heat Engine Can Use Heat to do Work. But It Can't Be Perfectly Efficient! | Doc Physics
A Heat Engine Can Use Heat to do Work. But It Can't Be Perfectly Efficient! | Doc Physics
- Report rights infringement
- published: 05 Dec 2012
- views: 13603
4:37
Heat Engines And Second Law Of Thermodynamics
Follow us at: https://plus.google.com/+tutorvista/
Check us out at http://physics.tutorv...
published: 30 Apr 2010
Heat Engines And Second Law Of Thermodynamics
Heat Engines And Second Law Of Thermodynamics
- Report rights infringement
- published: 30 Apr 2010
- views: 117510
71:27
XI_91.Heat Engine
Physics, Class XI Chapter :Thermodynamics Topic : Heat Engine Classroom lecture by ...
published: 11 Jan 2013
XI_91.Heat Engine
XI_91.Heat Engine
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- published: 11 Jan 2013
- views: 17694
4:07
Very Simple Heat Engine
This is maybe the simplest heat engine that you can make. It is terribly inefficient, but ...
published: 30 Mar 2015
Very Simple Heat Engine
Very Simple Heat Engine
- Report rights infringement
- published: 30 Mar 2015
- views: 8209
11:38
Thermodynamics (Physics) Lesson 4 Heat Engines
published: 04 Feb 2012
Thermodynamics (Physics) Lesson 4 Heat Engines
Thermodynamics (Physics) Lesson 4 Heat Engines
- Report rights infringement
- published: 04 Feb 2012
- views: 12532
4:52
Simple Heat Engine
''Creativity is inventing, experimenting, growing, taking risks, breaking rules, making mi...
published: 06 May 2014
Simple Heat Engine
Simple Heat Engine
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- published: 06 May 2014
- views: 5247
0:38
Simple Heat Engine
Video of a homemade heat engine that a student in my conceptual physics course constructed...
published: 14 Jan 2010
Simple Heat Engine
Simple Heat Engine
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- published: 14 Jan 2010
- views: 286578
2:15
Curie Point Magnetic Heat Engine
Here is a little engine that demonstrates a magnetic property known as the Curie Effect.
...
published: 20 Mar 2014
Curie Point Magnetic Heat Engine
Curie Point Magnetic Heat Engine
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- published: 20 Mar 2014
- views: 127665
2:44
Sunflower Heat Engine in Sunlight/How it Works
Sunflower heat engine made from a coffee bag - running in sunlight and how-it-works. The d...
published: 28 Aug 2015
Sunflower Heat Engine in Sunlight/How it Works
Sunflower Heat Engine in Sunlight/How it Works
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- published: 28 Aug 2015
- views: 6883
6:19
Heat Engine Introduction
Introduction to the Carnot heat engine and the Rankine cycle. Made by faculty at the Unive...
published: 15 Mar 2012
Heat Engine Introduction
Heat Engine Introduction
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- published: 15 Mar 2012
- views: 14480
10:31
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11
published: 22 Apr 2012
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11
Physics Thermodynamics part 14 (Heat Engine) CBSE class 11
- Report rights infringement
- published: 22 Apr 2012
- views: 13225
15:55
Anti-Heat Engines: Refrigerators, Air Conditioners, and Heat Pumps | Doc Physics
These three things use input WORK to move heat from cold to hot (which is NOT the way the ...
published: 06 Dec 2012
Anti-Heat Engines: Refrigerators, Air Conditioners, and Heat Pumps | Doc Physics
Anti-Heat Engines: Refrigerators, Air Conditioners, and Heat Pumps | Doc Physics
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- published: 06 Dec 2012
- views: 31131
5:47
The Rubber Band Heat Engine
This is a demonstration called the rubber band heat engine. As the name suggests, you take...
published: 06 Sep 2008
The Rubber Band Heat Engine
The Rubber Band Heat Engine
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- published: 06 Sep 2008
- views: 106416
3:10
How to Make Sunflower Heat Engine using Coffee Bag
How to make a sunflower heat engine using a coffee bag. This one is an unbalanced motor wi...
published: 21 Aug 2015
How to Make Sunflower Heat Engine using Coffee Bag
How to Make Sunflower Heat Engine using Coffee Bag
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- published: 21 Aug 2015
- views: 11801
A Heat Engine Can Use Heat to do Work. But It Can...
Heat Engines And Second Law Of Thermodynamics...
XI_91.Heat Engine...
Very Simple Heat Engine...
Thermodynamics (Physics) Lesson 4 Heat Engines...
Simple Heat Engine...
Simple Heat Engine...
Curie Point Magnetic Heat Engine...
Sunflower Heat Engine in Sunlight/How it Works...
Heat Engine Introduction...
Physics Thermodynamics part 14 (Heat Engine) CBSE ...
Anti-Heat Engines: Refrigerators, Air Conditioner...
The Rubber Band Heat Engine...
How to Make Sunflower Heat Engine using Coffee Bag...
Heat Engine...
Animation - How stirling engine works....
WHE - Waste Heat Engine (water lubricated steam po...
How to make a very Simple heat engine...
Free Energy Nitinol Heat Machines invented in the ...
XI-12-3 Heat Engine (2015) Pradeep Kshetrapal Phys...
Heat of your hand Stirling Engine...
Cyclone Waste Heat Engine...
