Auxiliary power supply mode and water draw profile effects on the performance of thermosyphonic solar heaters with heat exchanger

Rakopoulos, CD

dc.contributor.author	Rakopoulos, CD	en
dc.date.accessioned	2014-03-01T01:39:35Z
dc.date.available	2014-03-01T01:39:35Z
dc.date.issued	1989	en
dc.identifier.issn	0741983X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/22893
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-38249025273&partnerID=40&md5=f271d7b40882007955c441394936a91b	en
dc.title	Auxiliary power supply mode and water draw profile effects on the performance of thermosyphonic solar heaters with heat exchanger	en
heal.type	journalArticle	en
heal.publicationDate	1989	en
heal.abstract	The purpose of the present work is to investigate the influence of auxiliary (electrical) power supply mode and load pattern (water draw profile) on the operating performance of a solar domestic thermosyphon with heat exchanger (indirect heating). To achieve this, a detailed theoretical model for such a system was developed. To check its validity, experimental work was carried out for the system under both no-draw and hot water withdrawal conditions. The agreement between theoretical and experimental results was very good. The analysis is then extended in order to study the methods of supplying auxiliary energy (inside the storage tank, in series or in a mixed way) to meet the loald requirements for a certain temperature hot water setting as well as hot water draw profile patterns. For this simulation a typical sequence of hourly values of solar radiation and ambient temperatures, based on meteorological data, are used (sunny, partly cloudy, hot, cold days, etc.). The results presented in terms of various performance parameters indicate the best method for maximizing the solar energy gain, and so minimizing the auxiliary power supply. © 1989.	en
heal.journalName	Solar and Wind Technology	en
dc.identifier.volume	6	en
dc.identifier.issue	5	en
dc.identifier.spage	595	en
dc.identifier.epage	604	en