Ground/Water Type Heat Pumps

Ground/Water Type Heat Pumps Principle

This heat pump works on a different principle compared to the other types. The base of this heat pump is a plastic pipe, called ground collector and several hundred metres long, with non-freezing liquid circulating inside. By circulating in the ground collector, the liquid heats up by several degrees as the temperature from a certain depth is stable around 4°C. The method of heated liquid processing is similar as with the other heat pump types. The liquid flows to the heat pump exchanger where it cools - it is deprived of the thermal increment - and the cooled liquid goes back to the collector to get heated up again. Such cycle repeats constantly.

Low-potential energy can be deprived from the ground using horizontal plane collector or from vertical drill. For water/water and ground/water heat pumps, there is a rule valid in our climatic and economic conditions. This rule recommends that we install the heat pump power to 70% of the building’s thermal loss. The rest of the loss is covered by an auxiliary source of heat, typically electrical boiler, during the lowest temperatures (in the order of several days in the heating season).

From our experience we know that installing the heat pump to 100% of the thermal loss would mean a dramatic increase of the investment costs, bringing almost no savings on further operational costs along. That is why we design systems that are perfect compromise between investment and operational costs.


Disadvantages
  • higher investment expenses (drill)
  • extensive land work (collector)
Advantages
  • stable heating power
  • savings up to 70% of the expenses
  • long-time lifetime
  • absolutely silent operation
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