Investigations on the influence of aquifers on the ground temperature in ground-source heat pump operation

► A moving aquifer opposes the thermal drift involved by ground-source heat pumps. ► A model of the influence of the groundwater flow on the thermal drift was set up. ► A 4-zone formulation was identified for the analytical model solution. ► An application of the model is done on contiguous borefields of existing buildings. ► Saving were evaluated on costs of investments (up to 16%) or operation (up to 6%).