24 June 2014

BRINE-TO-WATER HEAT PUMPS EVALUATED FOR NORDIC CLIMATE AND THE SWEDISH MARKET


A comparative test of eight brine-to-water heat pumps sold on the Swedish market has been performed at SP Technical Research Institute of Sweden on behalf of the Swedish Energy Agency. The test included measurements of performance for space heating (EN14511 and EN14825) and for heating of domestic hot water (EN16147). Similar tests were performed in 1998 and in 2005. The results from these tests show that the performance of the heat pumps has improved since 1998 and 2005, but also that the spread is significant.
The seasonal coefficient of performance (SCOP) was calculated according to EN14825, which is the same measure that will be used in the eco-design and energy labelling directives for space heaters within the EU. A combined SCOP for alternating or simultaneous space and domestic hot water heating was also calculated by a method developed by SP. Results
show that climate, heat demand and type of heating system of the house all have an impact on the SCOP, showing that heat pumps should be chosen with regard to the house and its location.