How Heat Pumps Work

How It Works

The heat pump uses air-source heat pump technology. A Heat Pump Is an electrical device that extracts heat from one place and transfers it to another. The heat pump transfers heat by circulating a refrigerant through a cycle of alternating evaporation and condensation. A compressor pumps the refrigerant between two heat exchanger coils. An outdoor unit has a coil in which the refrigerant is evaporated at low pressure and absorbs heat from its surroundings. The refrigerant is then compressed on its way to the indoor unit coil, where it condenses at high pressure. At this point, it releases the heat it absorbs earlier in the cycle. The process is illustrated by this diagram.

Given a heat pumps ability to absorb heat from the surrounding outside air, the System is extremely efficient producing as much as 5.45 kw of heating energy from just 1 kw of electricity supplied. This compares very favourably to other forms of heating as they produce only about 0.9 kw of energy for every 1 kw supplied see diagrams below.
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