Influence of hydraulics and control of thermal storage in solar assisted heat pump combisystems
2014 (English)In: Energy Procedia Volume 48: Proceedings of the 2nd International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2013), Elsevier, 2014, 946-955 p.Conference paper (Refereed)
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
Elsevier, 2014. 946-955 p.
, Energy Procedia, ISSN 1876-6102 ; 48
Heat pump, Hydraulics and control, Solar combisystems, Water storage
IdentifiersURN: urn:nbn:se:kth:diva-145467DOI: 10.1016/j.egypro.2014.02.108ISI: 000345410700107ScopusID: 2-s2.0-84898934376OAI: oai:DiVA.org:kth-145467DiVA: diva2:718759
2nd International Conference on Solar Heating and Cooling for Buildings and Industry, SHC 2013; Freiburg; Germany; 23 September 2013 through 25 September 2013
QC 201405222014-05-222014-05-212015-10-05Bibliographically approved