An experimental study on a novel defrosting method for cold room

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dc.authoridGuruf, Gursah/0000-0003-3602-8710
dc.authoridKARAGOZ, Mustafa/0000-0002-2595-9002
dc.contributor.authorAbdulla, Mahade Omran Ali
dc.contributor.authorDeniz, Emrah
dc.contributor.authorKaragoz, Mustafa
dc.contributor.authorGuruf, Gursah
dc.date.accessioned2024-09-29T15:54:59Z
dc.date.available2024-09-29T15:54:59Z
dc.date.issued2021
dc.departmentKarabük Üniversitesien_US
dc.description.abstractRefrigeration systems can be blocked by frost accumulating on the evaporator, when they operate at a temperature below the dew point of air and the freezing point of water. Therefore, a defrost process that consumes extra energy needs to be started from time to time. Conventional defrosting methods require energy and time to complete, which reduce the refrigeration efficiency and cause a temperature fluctuation in the storage room during the defrosting process. In this study, a new type of defrosting is used in order to reduce the energy needed for defrosting, improve refrigeration efficiency and decrease temperature fluctuations, which utilize the heat from the liquid refrigerant to defrost the evaporator using two evaporators and a four-way valve. When one of the evaporators cools the room, the other is used for sub-cooling the refrigerant before entering the cooler evaporator. The sub-cooling process provides defrosting of the second evaporator. When the cooler evaporator requires defrosting, the four-way valve reverses the cycle, and the second evaporator becomes cooler. The first evaporator then becomes the sub-cooler to be defrosted. A cold room with this concept was built and tested experimentally together with a conventional cooling system. Energy, exergy, economic and environmental (4E) analyses of both systems were made and the results were compared. The results show that the new method can perform the defrosting process using the energy dissipated from the sub-cooling refrigerant without using any external power source and improve refrigeration efficiency by 12%. Moreover, this new system does not interrupt the cooling process during defrosting process as the conventional systems do. Temperature fluctuations also decrease by about 60% following this method.en_US
dc.identifier.doi10.1016/j.applthermaleng.2021.116573
dc.identifier.issn1359-4311
dc.identifier.issn1873-5606
dc.identifier.scopus2-s2.0-85100406274en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.applthermaleng.2021.116573
dc.identifier.urihttps://hdl.handle.net/20.500.14619/4403
dc.identifier.volume188en_US
dc.identifier.wosWOS:000635628000010en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.relation.ispartofApplied Thermal Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDefrosting methoden_US
dc.subject4E analysis, cooling-storage roomen_US
dc.subjectEvaporatorsen_US
dc.subjectSub-coolingen_US
dc.subjectRefrigeration efficiencyen_US
dc.subjectLiquid refrigeranten_US
dc.titleAn experimental study on a novel defrosting method for cold roomen_US
dc.typeArticleen_US

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