Natural and Active Cooling - Cooling with heat pumps

A heat pump is not only an extremely environmentally friendly heating system, but also very versatile in its application. In addition to its primary task of supplying heat to residential buildings, it is also able to cool them during the warm months. There are basically two methods of cooling: passive and active cooling.
 

Passive cooling with heat pumps

Passive cooling ("natural cooling") works in combination with a brine-water or water-water heat pump. In the brine/water heat pump, the brine liquid extracts the heat from the heating circuit via a heat exchanger and dissipates it to the outside. With the water-water heat pump, the groundwater takes over this task. The natural ambient temperature is used for cooling. Except for control and circulation pump, the heat pump is switched off. The compressor is not in operation and therefore does not draw electricity. This makes "natural cooling" a particularly energy-saving and cost-effective method of cooling buildings.

Convenient cooling effect without noise disturbance

With the aid of passive cooling, the room temperature can be lowered by about three degrees Celsius. The additional effort during installation is low and no disturbing noises occur during operation. Passive cooling is possible with ground collectors as well as with ground probes, whereby ground probes provide a higher power.

If system owners want to cool the rooms with their heat pump, they only need an NC box. It is a completely pre-assembled unit that combines all the necessary components. Installation by a specialist is quick and uncomplicated.

A living room with sea view symbolises the advantages of natural and active cooling

Temperature-controlled rooms thanks to natural cooling

Active cooling with heat pumps

Active cooling simply reverses the function of the heat pump. For this purpose, the cooling circuit is rotated internally or the primary and secondary connections are switched externally. Like in a refrigerator, the heat pump then actively generates the cool air. With this method, the compressor remains in operation and the heat pump can provide a higher cooling capacity compared to passive cooling.

Extracted heat can be used in different ways

Active cooling can be achieved with both a ground source and an air source heat pump. Fan coils or underfloor or wall surface heating systems are suitable as cooling surfaces. The heat extracted from the rooms can either be returned to the heat source or used for DHW heating. In this way, the heating and cooling functions of a heat pump are combined extremely effectively.