A heat pump is a device that transfers heat energy from a source of heat to
a destination called a heat sink. Heat pumps are designed to move thermal
energy in the opposite direction of natural heat ow by absorbing heat from a
cold space and releasing it to a warmer one. A heat pump uses a small amount
of external power to do this,
When a heat pump is used for heating, it uses the same basic refrigeration-
type cycle used by an air conditioner or a refrigerator, but in the opposite
direction. This therefore releases heat into the conditioned space rather than
the ...
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