6
FOR THE USER
This is how your heat pump works
The heat pump Greenline HT Plus represents a new generation of heat pumps from IVT Industrier. The heat pump 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 collects a few degrees of the stored solar energy. The heat is 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.
The heat pump collects stored solar energy
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 boiling
point changes when the pressure
changes. However, the boiling point of
the refrigerant is as low as approxima-
tely -40ºC at atmospheric pressure.
Consequently, it is also suitable for
low heat source temperatures.
Note
Rock heat
Soil heat
Lake heat
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 of the refrigerant.
4. Compressor
Increases the pressure 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 refrige-
rant in the sidebar to the right.
See the detailed description of the technologies used in the heat pump on
the next page.
Technology in and around the heat pump
This is how your heat pump works
