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How it Works
A loop field
How it works in winter
How it works in summer
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A Closed loop Ground Source Loop
Field looks like this drawing underground. Typical boreholes
are 200' deep in a grid 15' apart. They are headered into a
manifold and brought into the building to the heat pump(s) which
circulate the heat in zones throughout the building. Radiant
heat or forced air heating or a hybrid of both can be used. |
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Water
or antifreeze solution is circulated through plastic pipes
buried beneath the earth's surface. During the winter, the fluid
absorbs heat from the earth which is about 50 degrees
year around and carries it through the system and into the
building. It's much more efficient to bring 50 degrees to
room temperature than to take outside air and heat or cool it to
room temperature.
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During
the summer, the system reverses itself to cool the building by
pulling heat from the building, carrying it through the system
and placing it in the ground..
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Heat pumps work like a refrigerator compressor,
transferring heat, not making heat or cold. That's why
it's so energy efficient.
In the late 1940's, Robert C. Webber, a cellar
inventor, was experimenting with his deep freezer. He dropped
the temperature in the freezer and touched the outlet pipe and
almost burned his hand.
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