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2
About your heat pump
2.1
Principles of function
A heat pump utilises the free energy from the sun and that is found in a natural
heat source, such as rock, ground, ground water or air. The heat pump can be com-
Figure 1: The relationship between consumed electrical energy and free solar energy.
In order for the heat pump to be able to retrieve heating energy from the outdoor
air and transfer it to the heating system of the house, two separate liquid circuits
are required. The figure below shows the different circuits and how they work
Water
Expansion valve/
pressure drop
Enclosed
refrigerant
together in the transfer of heating energy.
pared to a reversed refrigerator; in a refrigerator heat
is transferred from the inside of the refrigerator to the
outside, whereas in a heat pump, the stored solar energy
that is stored in a heat source is transferred to the inside
of the house. The heat pump uses the solar energy in the
heat source and gives back two to three times more heat
energy than it uses in electrical energy. The heat pump is,
therefore, a very environmentally friendly and economical
way of heating a house.
Heating system
Condenser
Compressor/
pressure increasing
Fan
Outdoor air
Figure 2: Function principles of a heat pump.
VUBMI102
Heating system – is the circuit that con-
tains the water that transports the heat/
energy to the heating system and the
water heater.
Refrigerant circuit – is the closed circuit
that contains a chlorine and freon free
refrigerant that inside the heat pump,
transfers the retrieved heat energy to the
heating system through evaporation,
compression and condensation.
Air heat exchanger
DHP-AX – 7
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