|
Last Updated: Sunday, October 02, 2011 |
|
Ground Source Heat Pump (GSHP) or Geothermal Heat Pump – Standard heat pumps rely on outside air as a heat sink or source. A ground source heat pump uses the stable temperature of the earth as the source or sink. This allows them to operate much more efficiently. In the summer, the condenser is rejecting heat to the 70 deg F earth instead of the 100+ deg F air. In the winter the unit draws heat from the 65 deg F earth instead of the cold outdoor air. Link: Geothermal Heat Pump Consortium Site Follow the flow diagram and chart below. In the HEATING Mode note the hot temperature coming off the compressor providing warm air to the house. After the expansion valve the Freon temperature drops and is able to pick up heat from the warm fluid returning from the earth loop. The warmer fluid is compressed again and the cycle continues. The graph shows that the unit will run in high speed (constant temp out from the compressor) and low speed (compressor cycles on and off). The outdoor temp (Tout) ran 16 – 37 degrees F. |
|
Heating Mode |
|
Air Temp: 90-105 degF |
