This Is How Your Heat Pump Works; Technology In And Around The Heat Pump - IVT Greenline HT Plus C Assembly, Commissioning And Maintenance Manual

This is how your heat pump works

This is how your heat pump works
The heat pump collects stored solar energy
The heat pump HT Plus has been manufactured for easy and reliable use as well as to provide your house with inexpensive
and environment friendly heating. The easiest way to describe how a heat pump works is to say it works like a refrigerator,
however, the other way round. In a refrigerator heat is moved from the inside to the outside. In a heat pump, heat stored in
the ground, rock or water, is moved into the house. The heat pump reclaims the stored solar energy, which is then led into
the house via a hose. The temperature is then increased in the heat pump and the heat is distributed to the house's heating
system.
Bedrock heat

Technology in and around the heat pump

The heat pump consists of four main parts:
1. Evaporator
Evaporates the refrigerant to gas and at the same time transfers the
heat from the heat transfer fl uid to the refrigerant circuit.
2. Condenser
Condenses the gas to fl uid again and transfers the heat to the heating
system.
3. Expansion valve
Lowers the pressure and temperature of the refrigerant
4. Compressor
Increases the pressure and temperature of the refrigerant
These four main parts are linked in three circuits. A refrigerant circulates
in the heat pump, which in some parts of the circuit is in a liquid state and
in other parts in a gas state. Read more about the properties of the refriger-
ant in the sidebar to the right.
The heat pump is a unit of the indirect system type, which is pressure
tested and test operated from the factory.
See the detailed description of the technologies used in the heat pump on
the next page.
Ground heat
6
Lake water heat
Note
Boiling point in relation to the
pressure:
The boiling point of different liquids
varies with pressure, the higher the
pressure, the higher the boiling point.
For example, water boils at +100ºC
at normal pressure. Double the pres-
sure and water boils at +120ºC. Half
the pressure and water then boils at
+80ºC. The refrigerant in the heat
pump acts in the same way, the boil-
ing point changes when the pressure
changes. However, the boiling point of
the refrigerant is as low as approxi-
mately -40ºC at atmospheric pressure.
Consequently, it is also suitable for
low heat source temperatures.