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Geothermal Heating / Geothermal Heat Pumps

Geothermal Heating / Geothermal Heat Pumps. Allie Paccadolmi. How T hey Work. “Split System” – outdoor unit (condenser) and indoor unit (evaporator coil) Compressor  changes gaseous refrigerant to high pressure gas Refrigerant cools and changes into a high temp gas

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Geothermal Heating / Geothermal Heat Pumps

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  1. Geothermal Heating / Geothermal Heat Pumps Allie Paccadolmi

  2. How They Work • “Split System” – outdoor unit (condenser) and indoor unit (evaporator coil) • Compressor  changes gaseous refrigerant to high pressure gas • Refrigerant cools and changes into a high temp gas • Liquid refrigerant expands and turns into gas – gas then absorbs heat from circulating air

  3. Advantages • Twice as efficient as the top-rated air conditioners • Energy costs are 30-70% lower • Reduces greenhouse gas emissions equivalent to planting 750 trees

  4. Disadvantages • Initial cost is high  two to three times higher than a conventional heating/cooling system • Open-loop systems – bring in water from outside, can lead to clogging, mineral deposits, or corrosion of pipes

  5. Impact on the Environment? • Reduces greenhouse gas emissions • 5.9 million CO2 emissions cut • 1.6 million C emissions cut

  6. Compared to other Energy Sources • Lasts longer – abt50 years longer • No gas lines – no potential for leakage or fire

  7. Restrictions • Open-loop systems: need a large supply of clean water to be most efficient • Limits use in coastal, lake, and river areas

  8. Facts • Takes only 1 kW/hr for a geothermal heat pump to produce nearly 12,000 Btu of cooling or heating. (To produce the same number of Btus, a standard heat pump consumes 2.2 kilowatt-hours.) • 50% more efficient than the best gas furnaces • 70% of energy used in a geothermal heat pump system is renewable energy from the ground

  9. Websites • http://climatelab.org/Geothermal_Heat_Pumps • http://www.residential.carrier.com/products/geothermalheatpumps/index.shtml • http://www.consumerenergycenter.org/home/heating_cooling/geothermal.html • http://www.thisoldhouse.com/toh/article/0,,20162296,00.html

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