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What is
Renewable Heating and Cooling?

Renewable heating and cooling is the technology that uses one of the free or nearly-free renewable energy resources, such as geothermal, solar or biomass, for the generation of heating and/or cooling for a home, business, industry or industrial process.

What is
Geothermal Heating and Cooling?

Geothermal heating and cooling is the technology that uses the free and available heat from the earth to provide heating and/or cooling for a home, business, industry or industrial process.

What are Geothermal Heat Pumps?

Geothermal heat pumps, also known as the ground source heat pumps, are highly efficient renewable energy technologies that is gaining wide acceptance for both residential and commercial buildings. 

Geothermal heat pumps are used for space heating and cooling, as well as water heating. Its great advantage is that it works by concentrating naturally existing heat, rather than by producing heat through combustion of fossil fuels.

The technology relies on the fact that the Earth (beneath the surface) remains at a relatively constant temperature throughout the year, warmer than the air above it during the winter and cooler in the summer - very similar to a cave. 

The geothermal heat pump takes advantage of this by transferring heat stored in the Earth or in ground water into a building during the winter, and transferring it out of the building and back into the ground during the summer. The ground acts as a "heat source" in winter and a "heat sink" in summer.

The system includes three principal components:

"Earth Coupled"

Another term used to describe homes and buildings using geothermal heat pumps is that they are "Earth coupled" in that they are using the Earth as a heat source (in winter) and a heat sink in the summer.  The Earth coupled system uses a series of pipes, commonly called a "loop" which is buried in the ground near the building to be heated or cooled.  The loop can be buried either vertically or horizontally. It circulates a fluid (water, or a mixture of water and antifreeze) that absorbs heat from, or gives heat to, the surrounding soil, depending on whether the ambient air is colder or warmer than the soil.

Heat Pump Subsystem

For heating, a geothermal heat pump removes the heat from the fluid in the Earth connection, concentrates it, and then transfers it to the building. For cooling, the process is reversed.

Heat Distribution Subsystem

Conventional ductwork is generally used to distribute heated or cooled air from the geothermal heat pump throughout the building.

Residential Hot Water

In addition to space conditioning, geothermal heat pumps can be used to provide domestic hot water when the system is operating. Many residential systems are now equipped with desuperheaters that transfer excess heat from the geothermal heat pump's compressor to the house's hot water tank. A desuperheater provides no hot water during the spring and fall when the geothermal heat pump system is not operating; however, because the geothermal heat pump is so much more efficient than other means of water heating, manufacturers are beginning to offer "full demand" systems that use a separate heat exchanger to meet all of a household's hot water needs. These units cost-effectively provide hot water as quickly as any competing system.


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Absorption Chillers Adsorption Chillers  Ammonia Chillers  Brayton Cycle  *  Carbon Emissions 

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We support the Renewable Energy Institute and the American Energy Plan by donating a portion of our profits to the Renewable Energy Institute in their efforts to reduce fossil fuel use through renewable energy and their goals to end fossil fuel pollution by reducing/eliminating Carbon Emissions, Carbon Dioxide Emissions and Greenhouse Gas Emissions.

The Renewable Energy Institute is "Changing The Way The World Makes and Uses Energy by Providing Research & Development, Funding and Resources That Creates Sustainable Energy via 'Carbon Free Energy,' 'Clean Power Generation' and 'Pollution Free Power' Through Expanding the use of Renewable Energy Technologies."


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