geothermal heating / geothermal heat pumps

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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 - PowerPoint PPT Presentation

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Geothermal Heating / Geothermal Heat Pumps

Geothermal Heating / Geothermal Heat PumpsAllie PaccadolmiHow They WorkSplit System outdoor unit (condenser) and indoor unit (evaporator coil)Compressor changes gaseous refrigerant to high pressure gasRefrigerant cools and changes into a high temp gasLiquid refrigerant expands and turns into gas gas then absorbs heat from circulating air

AdvantagesTwice as efficient as the top-rated air conditionersEnergy costs are 30-70% lowerReduces greenhouse gas emissions equivalent to planting 750 trees

DisadvantagesInitial cost is high two to three times higher than a conventional heating/cooling systemOpen-loop systems bring in water from outside, can lead to clogging, mineral deposits, or corrosion of pipes

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

Compared to other Energy SourcesLasts longer abt 50 years longerNo gas lines no potential for leakage or fire

RestrictionsOpen-loop systems: need a large supply of clean water to be most efficientLimits use in coastal, lake, and river areas

FactsTakes 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 furnaces70% of energy used in a geothermal heat pump system is renewable energy from the groundWebsiteshttp://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