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The Energy and Cost Savings of Geothermal HVAC and Solar Water Heating Systems

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 HVAC and Solar Water Heating Systems

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  1. The Energy and Cost Savings of Geothermal HVACand Solar Water Heating Systems Spencer Revenson

  2. 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

  3. Geothermal HVAC Installation Cost: 85% more than air-source heat pump How not to do it:

  4. Geothermal HVAC Installation Less impacting methods available

  5. Solar Water Heating • As we know… • Drainback Retrofit: + • Addition to current equipment • Freeze and overheating protection

  6. Real Potential

  7. Real Potential

  8. Real Potential -Solar

  9. 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

  10. Real Potential for average homes Cost Savings of Geothermal HVAC Cost Savings of Solar Water Heating $400 per year $1000 per year

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