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Use este identificador para citar o ir al link de este elemento: http://hdl.handle.net/1843/77301
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Campo DCValorIdioma
dc.creatorDavi Severo Lopespt_BR
dc.creatorWillian Moreira Duartept_BR
dc.creatorLuiz Machadopt_BR
dc.creatorBeatriz de Almeida Ferreira Bambirra Alvespt_BR
dc.creatorRaphael Nunes de Oliveirapt_BR
dc.date.accessioned2024-10-08T15:24:39Z-
dc.date.available2024-10-08T15:24:39Z-
dc.date.issued2023-
dc.citation.issue27pt_BR
dc.citation.spage1pt_BR
dc.citation.epage10pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/77301-
dc.description.resumoIn regions with less assistance and without electrification, the absence of refrigeration systems for storing vaccines, medicines and foodstuffs was evident during the Covid-19 pandemic. To supply these demands, an alternative, in line with sustainable prerogatives, would be the use of a conventional vapor compression refrigerator operating with electricity generated in a photovoltaic panel (PVC). The objective of this work was the experimental determination of the overall coefficient of performance (COP) of a commercial refrigerator with a volume of 79 L associated with a photovoltaic panel with a power of 320 W and an efficiency of 19%. In addition to these components, the experimental bench had an MPPT charge controller, an AC-DC converter with 90% efficiency and two electric batteries with unit loads of 45 Ah. To obtain the refrigerator COP, an electrical resistor was placed into internal compartment. The resistor was supplied with electric current by a variable voltage source, which provided a dissipated power of 30 W to 70 W. In addition to this rate of internal heat generation, the input of energy from the environment to the interior of the refrigerator was obtained with the help of heat transfer correlations for natural convection and thermal radiation. These correlations and the corresponding energy balances were subsidized with values of temperature obtained by calibrated K-type thermocouples installed on the internal walls and on the coil of the refrigerator evaporator. A data acquisition system was used to record the internal temperatures and the environment. Compressor energy consumption was recorded by an energy meter, which was also connected to the data acquisition system. The results of 35 experimental tests revealed that the cooling capacity of the machine ranged from 75 W to 137 W, for which the corresponding COP values associated with the refrigeration cycle ranged from 1.05 to 1.40, while the values of the global COP ranged from 0.17 to 0.24. The energy performance of the solar refrigerator was less than that relative to standard operation, whose reference COP provided by the manufacturer is 1.45. The reason for this significant drop in efficiency was due to the combined efficiencies of the PVC, inverter, and electrical components in the system. However, the PVC refrigerator proved to be viable for use in areas without electrification, mainly in regions with high availability of solar energy.pt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentPROPLAN - PRO-REITORIA DE PLANEJAMENTOpt_BR
dc.publisher.departmentPROPOS - PRO-REITORIA DE POS-GRADUACAOpt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofCongresso Brasileiro de Engenharia Mecânica-
dc.rightsAcesso Abertopt_BR
dc.subjectRefrigeratorpt_BR
dc.subjectCOPpt_BR
dc.subjectPhotovoltaic panelpt_BR
dc.subjectSolar energypt_BR
dc.subjectRenewable energypt_BR
dc.subject.otherEngenharia mecânicapt_BR
dc.subject.otherEnergia solarpt_BR
dc.subject.otherEnergia renovávelpt_BR
dc.titleExperimental study and analysis of the energy performance of a vapor compression refrigerator powered by solar photovoltaic energy for regions without electrificationpt_BR
dc.typeArtigo de Eventopt_BR
dc.url.externahttps://eventos.abcm.org.br/cobem2023/pt_BR
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