Analyzing the efficiency of a heat pump assisted drain water heat recovery system that uses a vertical inline heat exchanger
2014 (English)In: Sustainable Energy Technologies and Assessments, ISSN 2213-1388, E-ISSN 2213-1396, Vol. 8, 109-119 p.Article in journal (Refereed) Published
The purpose of the present study is to accumulate knowledge on how a drain water heat recovery system using a vertical inline heat exchanger and a heat pump performs under different drain water flow profile scenarios. Investigating how the intermittent behavior of the drain water influences the performance for this type of system is important because it gives insight on how the system will perform in a real life situation. The scenarios investigated are two 24. h drain water flow rate schedules and one shorter schedule representing a three minute shower.The results from the present paper add to the knowledge on how this type of heat recovery system performs in a setting similar to a multi-family building and how sizing influences the performance. The investigation shows that a heat recovery system of this type has the possibility to recover a large portion of the available heat if it has been sized to match the drain water profile. Sizing of the heat pump is important for the system performance; sizing of the storage tank is also important but not as critical.
Place, publisher, year, edition, pages
2014. Vol. 8, 109-119 p.
Coiled heat exchanger, Drain water heat recovery, Falling film heat exchanger, Heat pump heat recovery
IdentifiersURN: urn:nbn:se:kth:diva-148780DOI: 10.1016/j.seta.2014.08.003ScopusID: 2-s2.0-84907169290OAI: oai:DiVA.org:kth-148780DiVA: diva2:737050
QC 20150317. Updated from accepted to published.2014-08-112014-08-112015-03-17Bibliographically approved