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If there is no dry cooler or any regeneration unit available, the heat pump can be limited in storing cooling inside the BTES system. This option is suboptimal because the heat pump is a preferable production unit. If the heat pump is limited, it won’t deliver anymore heating to the building, resulting in a lower heating contribution of the heat pump and a higher contribution of the boiler.
A dry cooler or any other regeneration unit can be used to release the excess cooling to the ambient air instead of storing it in the BTES system. In this case, the heat pump sort of works like an Air Source Heat Pump (ASHP) instead of a Ground Source Heat Pump (GSHP).
A dry cooler is used to release the excess heat stored in the BTES system when there is no cooling demand.
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