23 September 2011
Annex 32 in the Heat Pump Programme (HPP) of the International Energy Agency (IEA) on the application of multifunctional heat pumps for heating and cooling in low energy
houses with ten participating countries has been concluded in the end of 2010. Main working areas of Annex 32 have been the development of prototypes with extended functionality of cooling and partly dehumidification and the application of natural refrigerants. Furthermore, extensive field testing of marketable heat pumps in low energy houses has been a major research topic. The prototypes show promising lab-test and simulation results of integrated multifunctional heat pumps with substantial energy savings up to 50% compared to state-of-the-art
technologies. Field test results confirm generally reliable heat pump operation with good seasonal performance of about 4 for brine-to-water and 3 for air-to-water heat pumps, but also optimisation potentials were found. Final results have been documented in four reports, containing an umbrella report, a market overview with categorisation of multifunctional heat
pumps, a report on the prototypes including lab-test and system simulation and a report on the field results in Annex 32.