- published: 02 Dec 2014
- views: 94911
Geothermal gradient is the rate of increasing temperature with respect to increasing depth in the Earth's interior. Away from tectonic plate boundaries, it is about 25 °C per km of depth (1 °F per 70 feet of depth) near the surface in most of the world. Strictly speaking, geo-thermal necessarily refers to the Earth but the concept may be applied to other planets. A line tracing the gradient through the planetary body is called a geotherm on Earth and other terrestrial planets. On the Moon it is called a selenotherm.
The Earth's internal heat comes from a combination of residual heat from planetary accretion, heat produced through radioactive decay, and possibly heat from other sources. The major heat-producing isotopes in the Earth are potassium-40, uranium-238, uranium-235, and thorium-232. At the center of the planet, the temperature may be up to 7,000 K and the pressure could reach 360 GPa(3.6 million atm). Because much of the heat is provided by radioactive decay, scientists believe that early in Earth history, before isotopes with short half-lives had been depleted, Earth's heat production would have been much higher. Heat production was twice that of present-day at approximately 3 billion years ago, resulting in larger temperature gradients within the Earth, larger rates of mantle convection and plate tectonics, allowing the production of igneous rocks such as komatiites that are not formed anymore today.
Geothermal drilling is the process of creating boreholes in the earth to extract the earth's heat. Geothermal Exploration is the exploration of the subsurface in search of viable active geothermal regions with the goal of building a geothermal power plant, where hot fluids drive turbines to create electricity. Exploration methods include a broad range of disciplines including geology, geophysics, geochemistry and engineering. Geothermal regions with adequate heat flow to fuel power plants are found in rift zones, subduction zones and mantle plumes. Hot spots are characterized by four geothermal elements. An active region will have: Heat Source - Shallow magmatic body, decaying radioactive elements or ambient heat from high pressures Reservoir - Collection of hot rocks from which heat ca...
This Old House plumbing and heating expert Richard Trethewey explains how to capture the heat buried deep in the ground. Click here to SUBSCRIBE to the official This Old House YouTube channel: http://www.youtube.com/subscription_center?add_user=thisoldhouse How to Install Weather-Sensitive Heating Controls: https://www.youtube.com/watch?v=NIsvYXdeM2g&list;=PLkJADc1qDrr_0NxtmzECiOWkr5de82kXV&index;=27 How to Maintain an Electric Water Heater: https://www.youtube.com/watch?v=cTPSoUKiKRs&list;=PLkJADc1qDrr_0NxtmzECiOWkr5de82kXV&index;=79 How to Flush a Water Heater: https://www.youtube.com/watch?v=PjwENIksoWE&index;=211&list;=PLkJADc1qDrr_0NxtmzECiOWkr5de82kXV Follow This Old House: Facebook: https://www.facebook.com/ThisOldHouse Twitter: https://twitter.com/thisoldhouse Pinterest: http://ww...
More at http://www.drillyourownwell.com From the Drill Your Own Well Series. This video shows the techniques used by commercial well drillers to install geothermal vertical loops. It is useful when trying to drill your own well to know how the pros do it. This shows how a commercial drilling rig operates.
See how we can generate clean, renewable energy from hot water sources deep beneath the Earth's surface. The video highlights the basic principles at work in geothermal energy production, and illustrates three different ways the Earth's heat can be converted into electricity. Transcript: http://energy.gov/eere/videos/energy-101-geothermal-energy --- Subscribe to Energy for regular content: http://goo.gl/Ga5lP Like Energy on Facebook: https://www.facebook.com/energygov Follow Energy on Twitter: https://twitter.com/ENERGY
The following edit was recommended by DOE's Office of Energy Efficiency and Renewable Energy's Geothermal Technologies Office: At :58, “During the winter, the air is usually cooler than the temperature below ground. The solution circulates in a loop underground and absorbs the Earth's heat. This heat is brought to the surface and transferred to a heat pump. T̶h̶e̶ ̶h̶e̶a̶t̶ ̶p̶u̶m̶p̶ ̶w̶a̶r̶m̶s̶ ̶t̶h̶e̶ ̶a̶i̶r̶ ̶a̶n̶d̶ ̶y̶o̶u̶r̶ ̶r̶e̶g̶u̶l̶a̶r̶ ̶h̶e̶a̶t̶i̶n̶g̶ ̶s̶y̶s̶t̶e̶m̶ ̶w̶a̶r̶m̶s̶ ̶t̶h̶e̶ ̶a̶i̶r̶ ̶s̶o̶m̶e̶ ̶m̶o̶r̶e̶ ̶t̶o̶ ̶a̶ ̶c̶o̶m̶f̶o̶r̶t̶a̶b̶l̶e̶ ̶t̶e̶m̶p̶e̶r̶a̶t̶u̶r̶e̶.̶ ̶F̶i̶n̶a̶l̶l̶y̶ Ducts circulate the air to the various rooms.” --- An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building ...
I'm trying to figure out some low energy alternative way to have air conditioning. My off grid power system can't keep up with a conventional unit so I figured I would try this.
Geothermal Energy Options - How It Works Geothermal Energy Options is a full service geothermal heating and cooling company. We engineer, design and install residential and commercial systems and specialize in direct exchange geothermal. We are certified by BPI, IGSHPA, NYSERDA and part of Central Hudson's Trade Allies and The Connecticut Clean Energy Fund. All of our employees are trained and certified in every phase of the geothermal process. It is our goal to supply our clients with well designed, well installed geothermal heating systems, sensible solar products, wind power as well as emerging energy saving technology. Use of this technology can help eliminate or reduce America's dependency on foreign oil, and fossil fuel products. With a range of equipment to suit as many needs as...
Geothermal Pond Loop Installation on existing house in Louisville, KY from Geothermal by Design. Call 502.216.8300 or visit us online at www.geothermalbydesign.com for more information.
If you own a fridge you own the same technology used in a geothermal heating system. It's called a heat pump and its job is to pump heat from one place to another. In the fridge's case it pumps the heat out of the fridge to keep it cool. In a ground source heat pump's case it pumps the latent heat in the ground into your home. Get a more detailed explanation and get to see both a residential and a commercial scale example of this energy efficient technology that takes advantage of the Earth's constant temperature. Read our blogs, check out our podcasts and check even more extras at http://www.greenenergyfutures.ca/episode/06/geothermal-101
homemade Geothermal for off grid air conditioning with solar.