Simultaneous production of domestic hot water and space cooling with a heat pump in a Swedish Passive House
2012 (English)In: Proceedings of the 25th International Conference on Efficiency, Cost, Optimization and Simulation of Energy Conversion Systems and Processes, ECOS 2012, 2012, Vol. 7, 251-260 p.Conference paper (Refereed)
Passive Houses have gained popularity the last ten years as a way of improving the energy efficiency in the housing stock. During the cold winter in Sweden, space heating is at times needed but a Passive House is limited to a maximum use of energy for space heating. The challenge of avoiding space heating during the cold wint er climate in Sweden has pushed the design of a Passive House in a direction where problems with excessive indoor temperatures might occur summertime. This paper evaluates a comfort cooling strategy for reaching comfortable indoor climate summertime while maintaining good energy efficiency. The strategy is to use the free cooling from a heat pump while producing domestic hot water. A literature study on heat pumps for simultaneous heating and cooling (HPS) was made in order to make assumptions of the cooling and heating capacities of the HPS for the building simulations. The effect this free cooling has on the indoor climate was thereafter simulated with IDA Indoor Climate and Energy. The building model is based on an actual Passive House in the district of Lambohov in Linköping, Sweden, where continuous logging of temperatures are available. Without comfort cooling, the simulations show excessive temperatures summertime, which is consistent with field measurements from the actual house. Further, the simulation results demonstrate a substantial removal (60-80 %) of excessive indoor temperatures summertime with the cooling strategy implemented.
Place, publisher, year, edition, pages
2012. Vol. 7, 251-260 p.
Passive House, Comfort cooling, Building Simulation, Heat pump
IdentifiersURN: urn:nbn:se:kth:diva-143417ScopusID: 2-s2.0-84896520310ISBN: 978-886655322-9OAI: oai:DiVA.org:kth-143417DiVA: diva2:706602
25th International Conference on Efficiency, Cost, Optimization and Simulation of Energy Conversion Systems and Processes, ECOS 2012, Perugia, Italy, 26 June 2012 through 29 June 2012
QC 201403212014-03-212014-03-212015-05-07Bibliographically approved