The effect of the intermediate fluid-flow rate on the system performance in the closed circuit applications of the solar collector

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dc.contributor.authorYildizhan, Hasan
dc.contributor.authorCheema, Taqi Ahmad
dc.contributor.authorSivrioglu, Mecit
dc.date.accessioned2025-01-06T17:30:16Z
dc.date.available2025-01-06T17:30:16Z
dc.date.issued2021
dc.description.abstractSolar collector water heating system use solar thermal energy to provide hot water for domestic and industrial use. These systems are operated either as open-loop or closed-loop flow circuit. The former loop systems are not recommended for the cold climates having water freezing problem. Although previous studies on solar collectors have used closed-loop operation with water as the working fluid. However, it must have high boiling and low freezing points for the colder regions and thus arises the need for antifreeze mixtures of water. Another solution the same problem is the use of heat transfer oil as intermediate working fluids. In the present study, the energy and exergy analysis of a boiler supported vacuum tube solar collector system working with closed-loop in different working fluid-flow rates have been performed and evaluated. Heat transfer oil has been used as an intermediate working fluid in the closed loop system at different flow rates of 0.277 kg/s, 0.383 kg/s, and 0.494 kg/s. The results show that the collector temperature difference as well as the outlet temperature decrease. However, the collector inlet temperature increases by increasing the flow rate. Moreover, with the increase in flow rate, it was ascertained that the energy and exergy efficiency of the system and the collectors increase. The main finding of the present study is that the intermediate fluid used in the closed-circuit operation of the solar collectors has a direct effect on the energy and exergy efficiency of the system. © 2021 Society of Thermal Engineers of Serbia Published by the Vin?a Institute of Nuclear Sciences, Belgrade, Serbia. This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions
dc.identifier.doi10.2298/TSCI191130472Y
dc.identifier.endpage1191
dc.identifier.issn0354-9836
dc.identifier.issue2 Part A
dc.identifier.scopus2-s2.0-85103490193
dc.identifier.scopusqualityQ3
dc.identifier.startpage1181
dc.identifier.urihttps://doi.org/10.2298/TSCI191130472Y
dc.identifier.urihttps://hdl.handle.net/20.500.14669/1560
dc.identifier.volume25
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSerbian Society of Heat Transfer Engineers
dc.relation.ispartofThermal Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241211
dc.subjectclosed-loop vacuum tube solar collector
dc.subjectenergy and exergy analysis
dc.subjectheat transfer oil
dc.titleThe effect of the intermediate fluid-flow rate on the system performance in the closed circuit applications of the solar collector
dc.typeArticle

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