Experimental investigation of the performance of a solar-assisted ground-source heat pump system for greenhouse heating

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dc.contributor.authorOzgener, O
dc.contributor.authorHepbasli, A
dc.date.accessioned2019-10-27T18:58:39Z
dc.date.available2019-10-27T18:58:39Z
dc.date.issued2005
dc.departmentEge Üniversitesien_US
dc.description.abstractThe main objective of the present study is to investigate the performance characteristics of a solar-assisted ground-source heat pump system (SAGSHPS) for greenhouse heating with a 50 m vertical 1(1)/(4) in nominal diameter U-bend ground heat exchanger. This system was designed and installed in the Solar Energy Institute, Ege University, Izmir (568 degree days cooling, base: 22degreesC, 1226 degree days heating, base: 18degreesC), Turkey. Based upon the measurements made in the heating mode, the heat extraction rate from the soil is found to be, on average, 54.08 Wm(-1) of bore depth, while the required borehole length in meter per kW of heating capacity is obtained as 12.57. The entering water temperature to the unit ranges from 8.2 to 16.2degreesC, with an average value of 9.1degreesC. The greenhouse air is at a maximum day temperature of 25degreesC and night temperature of 14degreesC with a relative humidity of 40%. The heating coefficient of performance of the heat PUMP (COPHP) is about 2.13 at the end of a cloudy day, while it is about 2.84 at the end of sunny day and fluctuates between these values in other times. The COP values for the whole system are also obtained to be 5-15% lower than COPHP. Copyright (C) 2004 John Wiley Sons, Ltd.en_US
dc.identifier.doi10.1002/er.1049
dc.identifier.endpage231en_US
dc.identifier.issn0363-907X
dc.identifier.issn1099-114X
dc.identifier.issn0363-907Xen_US
dc.identifier.issn1099-114Xen_US
dc.identifier.issue3en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage217en_US
dc.identifier.urihttps://doi.org/10.1002/er.1049
dc.identifier.urihttps://hdl.handle.net/11454/37519
dc.identifier.volume29en_US
dc.identifier.wosWOS:000227072400002en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherWileyen_US
dc.relation.ispartofInternational Journal of Energy Researchen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectenergyen_US
dc.subjectground-source heat pumpen_US
dc.subjectgeothermal heat pumpen_US
dc.subjectgeothermal energyen_US
dc.subjectgreenhousesen_US
dc.subjectrenewable energyen_US
dc.subjectsustainable developmenten_US
dc.subjectTurkeyen_US
dc.titleExperimental investigation of the performance of a solar-assisted ground-source heat pump system for greenhouse heatingen_US
dc.typeArticleen_US

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