Experimental energy and exergy analyses of ship refrigeration system operated by frequency inverter at varying sea water temperatures

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dc.authorid0000-0002-3260-2992
dc.authorid0000-0002-1070-1754
dc.contributor.authorYilmaz, Oktay
dc.contributor.authorBayar, Haydar
dc.contributor.authorBashan, Veysi
dc.contributor.authorYigit, Kenan
dc.date.accessioned2026-02-12T21:05:17Z
dc.date.available2026-02-12T21:05:17Z
dc.date.issued2022
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractShip refrigeration compressors are sized to provide required capacity under extreme atmospheric and sea water temperatures, as well as full load and pulldown rates. Refrigeration compressors usually operate at 50-60 Hz in on/off mode at partial load in cold and temperate sea waters. The most efficient way to meet variable cooling demands is to change refrigerant mass flow by adjusting compressor speed. This paper is based on experimental investigation of ship cold storage refrigeration system on laboratory scale. Compressor is driven by inverter, and condenser is water-cooled type just like on ships. The refrigeration compressor has a power range of 600-1000 W and a maximum power of 1500 W. The system's refrigeration capacity ranges from 500 to 1350 W, with a maximum capacity of 2000 W. Experimental results were subjected to energy and exergy analyses. At 60 Hz, exergy efficiencies of compressor, condenser, expansion valve, and cold storage are 37.9%, 91.1%, 86.2%, and 69.8%, at - 5 degrees C cold storage and 18 degrees C water temperatures. In the same order, they contributed 73.2%, 7.6%, 10.4%, and 7% to wasted power. When water temperature increased from 18 to 35 degrees C at - 5 degrees C storage temperature and 50 Hz, coefficient of performance (COP) decreased by 55.2%. Despite compressor's thermodynamic irreversibility decreasing, combined electrical-mechanical efficiency deteriorated as frequency decreased. When compressor frequency was reduced from 60 to 40 Hz at - 5 degrees C cold storage and 18 degrees C water temperatures, COP increased by 13.9%.
dc.description.sponsorshipYildiz Technical University Scientific Research Projects Coordination Unit [2015-10-02-KAP02]
dc.description.sponsorshipThis work has been supported by Yildiz Technical University Scientific Research Projects Coordination Unit under Project Number 2015-10-02-KAP02. We also would like to thank Mr. Doan Tupta, Hakan Bakr, Kenan Ar, Huseyin, and smet for their assistance in building the experimental setup.
dc.identifier.doi10.1007/s40430-022-03439-5
dc.identifier.issn1678-5878
dc.identifier.issn1806-3691
dc.identifier.issue4
dc.identifier.scopus2-s2.0-85126550568
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1007/s40430-022-03439-5
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6870
dc.identifier.volume44
dc.identifier.wosWOS:000768234600002
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer Heidelberg
dc.relation.ispartofJournal of The Brazilian Society of Mechanical Sciences and Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260212
dc.subjectMarine refrigeration
dc.subjectEnergy analysis
dc.subjectExergy analysis
dc.subjectCoefficient of performance
dc.subjectVariable speed compressor
dc.subjectSea water temperature
dc.titleExperimental energy and exergy analyses of ship refrigeration system operated by frequency inverter at varying sea water temperatures
dc.typeArticle

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