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3 pages in length. The writer briefly discusses geothermal heat pump efficiency and air conditioner SEER ratings. Bibliography lists 2 sources.
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3 pages (~225 words per page)
File: LM1_TLCheatpump.rtf
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external air supplies, they "rely on the stable, even heat of the earth to provide heating, air conditioning and, in most cases, hot water" (California Energy Commission, 2006). The
fundamental components of the growing technology of geothermal heat pump operation begin with the condenser in outdoor units and an evaporative coil for those systems used indoors. Refrigerant is
the amalgam responsible for distributing heat from one place to another within the unit, turning into a high-pressure and high temperature liquid when compressed; expansion makes it become a gas
with low pressure and low temperature characteristics that allow it to absorb heat. Winter use finds the conventional heat pump drawing out heat from external (outdoor) air back inside
to circulate inside and redistribute via ducts (California Energy Commission, 2006). The misconception that cold air is a poor source of heat is partially why the geothermal heat pump is
not readily understood for its efficiency. Unless the temperature is below -200 degrees Fahrenheit, cold air has the capacity to carry heat as it is drawn into a heat
pump system; however, the colder it gets outside, the harder a conventional heat pump must work to maintain the comfortable temperatures desired inside. Geothermal heat pumps, by comparison, do
not use outside air to create heat but rather that which is produced by the earth itself. Seasonal temperature fluctuations do not pose a struggle for geothermal heat pumps
to maintain a comfortable inside climate because the heat given off not far down under the earths crust remains mostly constant (from 45-75 degrees Fahrenheit depending upon latitude) which effectively
stabilizes geothermal functioning (California Energy Commission, 2006). Ever been inside a cave in the summer? The air underground is a constant, cooler temperature than the air outside.
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