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The Energy and Cost Savings of Geothermal HVAC and Solar Water Heating Systems. Spencer Revenson. Geothermal HVAC Operation. Similar to conventional heat pump…except Use the ground as a heat sink or heat source rather than air Air: wrong temperature during demand
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The Energy and Cost Savings of Geothermal HVACand Solar Water Heating Systems Spencer Revenson
Geothermal HVAC Operation • Similar to conventional heat pump…except • Use the ground as a heat sink or heat source rather than air • Air: wrong temperature during demand • Cold when we want heat, hot when we want cool • Ground: constant temperature all year • Trade energy throughout the year • Fossil fuels and electric heat are one time use • Space Conditioning or Water Heating
Geothermal HVAC Installation Cost: 85% more than air-source heat pump How not to do it:
Geothermal HVAC Installation Less impacting methods available
Solar Water Heating • As we know… • Drainback Retrofit: + • Addition to current equipment • Freeze and overheating protection
Real Potential -Geothermal • $1935 in fuel oil costs for heating • $500 per summer for air conditioning • $2500/ton geothermal(U.S. DOE) =$7500 • 40% improvement vs. A/C(GHPC) = $200 • 41% improvement vs. Oil(GHPC) = $800 • $1000 per year energy savings • 7.5 year payback
Real Potential for average homes Cost Savings of Geothermal HVAC Cost Savings of Solar Water Heating $400 per year $1000 per year