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Influence of hydraulics and control of thermal storage in solar assisted heat pump combisystems
Dalarna University, School of Technology and Business Studies, Energy Technology. Department of Energy Technology, KTH. (SERC)ORCID iD: 0000-0002-3201-8518
Dalarna University, School of Technology and Business Studies, Energy Technology. (SERC)
2014 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 48, 946-955 p.Article in journal (Refereed) Published
Abstract [en]

This paper studies the influence of hydraulics and control of thermal storage in systems combined with solar thermal and heat pump for the production of warm water and space heating in dwellings. A reference air source heat pump system with flat plate collectors connected to a combistore was defined and modeled together with the IEA SHC Task 44 / HPP Annex 38 (T44A38) “Solar and Heat Pump Systems” boundary conditions of Strasbourg climate and SFH45 building. Three and four pipe connections as well as use of internal and external heat exchangers for DHW preparation were investigated as well as sensor height for charging of the DHW zone in the store. The temperature in this zone was varied to ensure the same DHW comfort was achieved in all cases. The results show that the four pipe connection results in 9% improvement in SPF compared to three pipe and that the external heat exchanger for DHW preparation leads to a 2% improvement compared to the reference case. Additionally the sensor height for charging the DHW zone of the store should not be too low, otherwise system performance is adversely affected

Place, publisher, year, edition, pages
2014. Vol. 48, 946-955 p.
Keyword [en]
solar combisystems; heat pump; water storage; hydraulics and control
National Category
Energy Systems
Research subject
Energy, Forests and Built Environments
Identifiers
URN: urn:nbn:se:du-14008DOI: 10.1016/j.egypro.2014.02.108ISI: 000345410700107OAI: oai:DiVA.org:du-14008DiVA: diva2:712996
Conference
SHC 2013, International Conference on Solar Heating and Cooling for Buildings and Industry, September 23-25, 2013, Freiburg, Germany
Funder
EU, FP7, Seventh Framework Programme
Available from: 2014-04-17 Created: 2014-04-17 Last updated: 2017-12-05Bibliographically approved

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