21 December 2007
Solar collectors may be used in combination with ground-source heat pumps in order to minimize the use of
electricity, and/or also if there is a need to increase the temperature in the brine or recharge the ground. The
latter might be the case if the borehole has become too short e.g. due to system changes or if it affected by other
boreholes in the vicinity. TRNSYS simulations have been conducted in order to analyse the advantages in
different systems for dwellings.