Where is more details on Geothermal heat pumps – Working principle and costs?”
Geothermal heat pumps that are also often referred to as the earth-coupled, water-source, or ground source heat pumps have been in use for almost 70 years now, starting from 1940s. These pumps use the moderate temperature in the ground for both heating and cooling. The temperature below the earth’s surface remains at a relatively constant temperature throughout the whole year, usually in range between 45°F(7°C) to 75°F(21°C), which means that during the winter ground temperature is warmer than the air, and therefore is used for heating, and during the summer the ground temperature is colder compared to air, and is therefore used for cooling. How do geothermal heat pumps work? Their working principle is much simpler than many people think it is, and geothermal heat pumps basically have the same working principle like air conditioners or refrigerators, by using the transfer of heat. To put it as simple as possible geothermal heat pumps can transfer heat from a cool space to a warm space,
See link and text below: http://renewableenergyarticles.blogspot.com/2009/12/geothermal-heat-pumps-working-principle.html Geothermal heat pumps – Working principle and costs >> Wednesday, December 2, 2009 Geothermal heat pumps that are also often referred to as the earth-coupled, water-source, or ground source heat pumps have been in use for almost 70 years now, starting from 1940s. These pumps use the moderate temperature in the ground for both heating and cooling. The temperature below the earth’s surface remains at a relatively constant temperature throughout the whole year, usually in range between 45°F(7°C) to 75°F(21°C), which means that during the winter ground temperature is warmer than the air, and therefore is used for heating, and during the summer the ground temperature is colder compared to air, and is therefore used for cooling. How do geothermal h
