Geothermal 101: Understanding the Mystery

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Geothermal 101: Understanding the Mystery

  1. 1. Geothermal Heat Pumps Geothermal 101 Understanding the Mystery 1 ECONAR Energy Systems
  2. 2. Geothermal Topics Geothermal Concepts  System Components  Moving Heat with Geothermal  Residential Case Study  2 ECONAR Energy Systems
  3. 3. The Basic Concept Geothermal Moves Heat Naturally 3 ECONAR Energy Systems
  4. 4. Geothermal Concepts Heat moves: From Warm To Cool 4 ECONAR Energy Systems
  5. 5. Geothermal Concepts  Geothermal uses the Earth’s natural heat as a renewable reliable energy source  It uses refrigeration technology  There is one system for heating and cooling 5 ECONAR Energy Systems
  6. 6. Geothermal Concepts  Earth’s surface temperature @ 8 feet remains constant at about 50°  Geothermal moves heat naturally  Fossil fuel systems create heat 6 ECONAR Energy Systems
  7. 7. Your Solar Collector 7 ECONAR Energy Systems
  8. 8. Geothermal Concepts Purpose of the Heat Pump: To provide a temperature difference • The temperature difference moves Btu’s • 8 ECONAR Energy Systems
  9. 9. Geothermal Concept Winter - Heating: Geothermal moves heat out of the Earth Summer - Cooling Geothermal moves heat into the Earth 9 ECONAR Energy Systems
  10. 10. Three Basic Components  1) The Earth  2) Geothermal Heat Pump  3) HVAC Distribution Systems 10 ECONAR Energy Systems
  11. 11. Moving Heat - The Geothermal Concept Key Components Geothermal Heat Pump Air Distribution System Geothermal Loop Field Intensify Removing Warm Air Heat from Heat the Earth Refrigerant to Air Water to Refrigerant Heat Exchanger Heat Exchanger 11 ECONAR Energy Systems
  12. 12. The Earth st Component The 1 12 ECONAR Energy Systems
  13. 13. Your Solar Collector 13 ECONAR Energy Systems
  14. 14. The Earth  Excellent solar collector  Natural renewal heat source  Easy to use as heat exchanger 14 ECONAR Energy Systems
  15. 15. Earth Heat Exchangers Two types:  Earth Loop / Pond Loop (closed)  Open Loop (well water) 15 ECONAR Energy Systems
  16. 16. 16 ECONAR Energy Systems
  17. 17. 17 ECONAR Energy Systems
  18. 18. 18 ECONAR Energy Systems
  19. 19. Earth Heat Exchanger: Horizontal Closed Loop Field Typical 6-Ton Horizontal System 19 ECONAR Energy Systems
  20. 20. Vertical Closed Loop 20 ECONAR Energy Systems
  21. 21. 21 ECONAR Energy Systems
  22. 22. Types of Heat Pumps Forced Air Heating & Cooling  Hydronic  Combination Forced Air &  Hydronic 22 ECONAR Energy Systems
  23. 23. 23 ECONAR Energy Systems
  24. 24. Inside the Heat Pump  Compressor  Refrigerant  Water Coil  Expansion Valve  Air Coil  Electronic Sensors & Controls 24 ECONAR Energy Systems
  25. 25. Moving Heat Naturally 50° Ground warms 32° Water warms 25° Refrigerant Refrigerant enters @ 25° Compressor Refrigerant leaves @ 160° 160° Refrigerant warms 70° Return Air to 100° Supply Air 25 ECONAR Energy Systems
  26. 26. Moving Heat - The Geothermal Concept Key Components Geothermal Heat Pump Air Distribution System Geothermal Loop Field Intensify Removing Warm Air Heat from Heat the Earth Refrigerant to Air Water to Refrigerant Heat Exchanger Heat Exchanger 26 ECONAR Energy Systems
  27. 27. A Review: The 3 Geothermal Components  Earth Heat Exchanger  Geothermal Heat Pump  HVAC Distribution System 27 ECONAR Energy Systems
  28. 28. Geothermal Advantages Economical: 50 % savings vs. Natural Gas  75 % savings vs. Propane Renewable Earth’s Surface – Solar Heated  Comfortable: Not a Drying Heat & Better A/C  Single Unit: Heat & Cooling  No Fossil Fuel: No Combustion, Safe  Low Maint. Located Inside, uses Ref. System  28 ECONAR Energy Systems
  29. 29. Geo 101 Summary Moving the Earth’s renewable heat  Heat will always move from Warm to Cool  Geothermal Heat Pumps:  - create the needed temperature difference to move Btu’s Single system for heating & cooling  29 ECONAR Energy Systems
  30. 30. Your Solar Collector 30 ECONAR Energy Systems
  31. 31. Case Study - Residential Typical Minnesota Home  3,000 SF  Annual Heating @ 100 MBTU  31 ECONAR Energy Systems
  32. 32. Residential Heating Costs Type of System Cost Geothermal $ 651 ( using $.080 per Kwh) 85% Nat. Gas $ 1,588 (using $1.35 / therm) 85% Propane $ 3,343 (using $ 2.60 / gal.) Electric $ 2,345 ( using $ .080 per Kwh) Annual Heating Usage @ 100 Mbtu 32 ECONAR Energy Systems
  33. 33. Case Study – Residential Clg. Annual Cooling Cost: Traditional A/C $ 200 Geothermal Cooling $ 140 Geo Savings $ 60 33 ECONAR Energy Systems
  34. 34. Case Study – Residential Annual Savings Summary Annual Geothermal Savings Compared to: Htg + Clg = Total Natural Gas $ 937 + $ 60 = $ 997 Propane $ 2,694 + $ 60 =$ 2,754 Electric $ 1,694 + $ 60 = $ 1,754 34 ECONAR Energy Systems
  35. 35. Your Solar Collector 35 ECONAR Energy Systems

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