05 Jun '14, 4pm

GREEN BUILDING 101: Eco-Power and Energy Efficiency

You are making the common error of confusing geothermal power with geothermal heat pumps. Geothermal power is based on using steam (212oF) coming from the earth. There are limited locations where this is viable. Geothermal heat pumps use heat pumps to extract heat energy from the ground at normal ground temperatures (30oF-60oF). The geothermal heat pumps have long vertical or horizontal pipes in the ground to assist the collection of heat from the ground in heating mode, or the rejection of heat to the ground in cooling mode. In heating mode the heat pumps take this low level energy from the ground and condense the heat, increasing the temperature to the point (100oF-110oF) where it is useful for heating homes and businesses. The heat pump’s compressors do use electricity to condense the heat, but there is a mechanical advantage of 3:1 or 4:1 over using electricity directl...

Full article: http://inhabitat.com/green-building-101-eco-power-and-ene...

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