Exergy analysis of refrigerator for a three steps freezing process

Temperature difference between the evaporator and the product during a freezing process is one of the sources of irreversibility. Application of three-steps evaporator temperature during the freezing course is expected to lower the irreversibility and improve energy efficiency of the system. The pur...

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Autores principales:	Paulus Sukusno, Radite Praeko Agus Setiawan, Yohanes Aris Purwanto, Armansyah Halomoan Tambunan
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2019
Materias:	stepping temperature freezer energy exergy cop Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/dabe217a053140989408c276affdbbf0
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spelling	oai:doaj.org-article:dabe217a053140989408c276affdbbf02021-11-04T15:51:56ZExergy analysis of refrigerator for a three steps freezing process2331-191610.1080/23311916.2019.1637621https://doaj.org/article/dabe217a053140989408c276affdbbf02019-01-01T00:00:00Zhttp://dx.doi.org/10.1080/23311916.2019.1637621https://doaj.org/toc/2331-1916Temperature difference between the evaporator and the product during a freezing process is one of the sources of irreversibility. Application of three-steps evaporator temperature during the freezing course is expected to lower the irreversibility and improve energy efficiency of the system. The purpose of this research is to analyze the energy and exergy efficiency of a refrigeration system with three-steps temperature for freezing process. The experiment was conducted using laboratory scale freezer equipped with three expansion valves to provide the required temperature level at each step. Thermodynamic properties of the refrigerant during the process were obtained by using Engineering Equation Solver (EES). The results show that freezing with three temperature steps gave total COP of 2.66, higher than COP of the fixed temperature process, which was 2.40. Exergy analysis shows that average irreversibility of the compressor with stepping temperature operation was higher than that of fixed temperature operation, which was mainly affected by the higher irreversibility during the first step of the stepping temperature operation. It is concluded that compressor work needs to be adjusted to the real work requirement by using an equipment such as inverter in order to take advantage of the stepping temperature operation in terms of more efficient use of power by the compressor.Paulus SukusnoRadite Praeko Agus SetiawanYohanes Aris PurwantoArmansyah Halomoan TambunanTaylor & Francis Grouparticlestepping temperaturefreezerenergyexergycopEngineering (General). Civil engineering (General)TA1-2040ENCogent Engineering, Vol 6, Iss 1 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	stepping temperature freezer energy exergy cop Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	stepping temperature freezer energy exergy cop Engineering (General). Civil engineering (General) TA1-2040 Paulus Sukusno Radite Praeko Agus Setiawan Yohanes Aris Purwanto Armansyah Halomoan Tambunan Exergy analysis of refrigerator for a three steps freezing process
description	Temperature difference between the evaporator and the product during a freezing process is one of the sources of irreversibility. Application of three-steps evaporator temperature during the freezing course is expected to lower the irreversibility and improve energy efficiency of the system. The purpose of this research is to analyze the energy and exergy efficiency of a refrigeration system with three-steps temperature for freezing process. The experiment was conducted using laboratory scale freezer equipped with three expansion valves to provide the required temperature level at each step. Thermodynamic properties of the refrigerant during the process were obtained by using Engineering Equation Solver (EES). The results show that freezing with three temperature steps gave total COP of 2.66, higher than COP of the fixed temperature process, which was 2.40. Exergy analysis shows that average irreversibility of the compressor with stepping temperature operation was higher than that of fixed temperature operation, which was mainly affected by the higher irreversibility during the first step of the stepping temperature operation. It is concluded that compressor work needs to be adjusted to the real work requirement by using an equipment such as inverter in order to take advantage of the stepping temperature operation in terms of more efficient use of power by the compressor.
format	article
author	Paulus Sukusno Radite Praeko Agus Setiawan Yohanes Aris Purwanto Armansyah Halomoan Tambunan
author_facet	Paulus Sukusno Radite Praeko Agus Setiawan Yohanes Aris Purwanto Armansyah Halomoan Tambunan
author_sort	Paulus Sukusno
title	Exergy analysis of refrigerator for a three steps freezing process
title_short	Exergy analysis of refrigerator for a three steps freezing process
title_full	Exergy analysis of refrigerator for a three steps freezing process
title_fullStr	Exergy analysis of refrigerator for a three steps freezing process
title_full_unstemmed	Exergy analysis of refrigerator for a three steps freezing process
title_sort	exergy analysis of refrigerator for a three steps freezing process
publisher	Taylor & Francis Group
publishDate	2019
url	https://doaj.org/article/dabe217a053140989408c276affdbbf0
work_keys_str_mv	AT paulussukusno exergyanalysisofrefrigeratorforathreestepsfreezingprocess AT raditepraekoagussetiawan exergyanalysisofrefrigeratorforathreestepsfreezingprocess AT yohanesarispurwanto exergyanalysisofrefrigeratorforathreestepsfreezingprocess AT armansyahhalomoantambunan exergyanalysisofrefrigeratorforathreestepsfreezingprocess
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Exergy analysis of refrigerator for a three steps freezing process

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