Development of binary refrigeration system using CO2 refrigerant for convenience store

From environmental point of view, natural refrigerants, whose Global Warming Potential (hereinafter GWP) is lower than commonly used refrigerants, have been considered in several industrial sectors. Refrigerated display cabinet that are installed in supermarkets and other small food stores such as C...

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Autores principales:	Yukio YAMAGUCHI, Kenji AMAGAI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	refrigeration trans-critical cascade system carbon dioxide co2 thermodynamics coefficient of performance (cop) Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/32a48af777fd43e38853e6942dab558e
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spelling	oai:doaj.org-article:32a48af777fd43e38853e6942dab558e2021-11-26T06:58:33ZDevelopment of binary refrigeration system using CO2 refrigerant for convenience store2187-974510.1299/mej.16-00169https://doaj.org/article/32a48af777fd43e38853e6942dab558e2016-11-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/6/3_16-00169/_pdf/-char/enhttps://doaj.org/toc/2187-9745From environmental point of view, natural refrigerants, whose Global Warming Potential (hereinafter GWP) is lower than commonly used refrigerants, have been considered in several industrial sectors. Refrigerated display cabinet that are installed in supermarkets and other small food stores such as Convenience Stores (hereinafter CVS) are commonly equipped with direct expansion refrigeration system using high GWP refrigerants such as HFC404A and HFC410A. Leakage rate and market stock of such high GWP refrigerants are the cause of global warming as a direct impact. Thus, natural refrigerants are considered as sustainable alternative refrigerants. Carbon dioxide (hereinafter CO2) is the most likely alternative refrigerant in the retail refrigeration sector because of non-toxicity and non-flammability. Furthermore, the efficiency level of refrigeration systems contribute to global warming as indirect impact. In these days, several refrigeration systems using CO2 refrigerant have been developed and installed in supermarket and CVS. New refrigeration systems using binary (cascade) cycle of CO2-CO2 refrigerant is developed for the refrigerated cabinets. In the early development, HFC404A refrigerant single cycle system and HFC-CO2 refrigerants cascade cycle system were usually used because the COP of CO2 refrigerant was low at high ambient temperature. Nevertheless, relatively high COP system could be constructed by optimizing the binary cycle using CO2-CO2 refrigerant. In this study, details of the system design and performance optimizations of the CO2-CO2 binary cycle will be discussed. Data of developed binary CO2-CO2 cycle system was compared with the data of current single HFC cycle and single CO2 cycle systems. As a result, it was confirmed that the energy efficiency of binary CO2-CO2 cycle became competitive to the current single HFC cycle. Moreover, some technical issues for enhancement of COP of CO2-CO2 binary cycle will be discussed in the literature.Yukio YAMAGUCHIKenji AMAGAIThe Japan Society of Mechanical Engineersarticlerefrigerationtrans-criticalcascade systemcarbon dioxideco2thermodynamicscoefficient of performance (cop)Mechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 6, Pp 16-00169-16-00169 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	refrigeration trans-critical cascade system carbon dioxide co2 thermodynamics coefficient of performance (cop) Mechanical engineering and machinery TJ1-1570
spellingShingle	refrigeration trans-critical cascade system carbon dioxide co2 thermodynamics coefficient of performance (cop) Mechanical engineering and machinery TJ1-1570 Yukio YAMAGUCHI Kenji AMAGAI Development of binary refrigeration system using CO2 refrigerant for convenience store
description	From environmental point of view, natural refrigerants, whose Global Warming Potential (hereinafter GWP) is lower than commonly used refrigerants, have been considered in several industrial sectors. Refrigerated display cabinet that are installed in supermarkets and other small food stores such as Convenience Stores (hereinafter CVS) are commonly equipped with direct expansion refrigeration system using high GWP refrigerants such as HFC404A and HFC410A. Leakage rate and market stock of such high GWP refrigerants are the cause of global warming as a direct impact. Thus, natural refrigerants are considered as sustainable alternative refrigerants. Carbon dioxide (hereinafter CO2) is the most likely alternative refrigerant in the retail refrigeration sector because of non-toxicity and non-flammability. Furthermore, the efficiency level of refrigeration systems contribute to global warming as indirect impact. In these days, several refrigeration systems using CO2 refrigerant have been developed and installed in supermarket and CVS. New refrigeration systems using binary (cascade) cycle of CO2-CO2 refrigerant is developed for the refrigerated cabinets. In the early development, HFC404A refrigerant single cycle system and HFC-CO2 refrigerants cascade cycle system were usually used because the COP of CO2 refrigerant was low at high ambient temperature. Nevertheless, relatively high COP system could be constructed by optimizing the binary cycle using CO2-CO2 refrigerant. In this study, details of the system design and performance optimizations of the CO2-CO2 binary cycle will be discussed. Data of developed binary CO2-CO2 cycle system was compared with the data of current single HFC cycle and single CO2 cycle systems. As a result, it was confirmed that the energy efficiency of binary CO2-CO2 cycle became competitive to the current single HFC cycle. Moreover, some technical issues for enhancement of COP of CO2-CO2 binary cycle will be discussed in the literature.
format	article
author	Yukio YAMAGUCHI Kenji AMAGAI
author_facet	Yukio YAMAGUCHI Kenji AMAGAI
author_sort	Yukio YAMAGUCHI
title	Development of binary refrigeration system using CO2 refrigerant for convenience store
title_short	Development of binary refrigeration system using CO2 refrigerant for convenience store
title_full	Development of binary refrigeration system using CO2 refrigerant for convenience store
title_fullStr	Development of binary refrigeration system using CO2 refrigerant for convenience store
title_full_unstemmed	Development of binary refrigeration system using CO2 refrigerant for convenience store
title_sort	development of binary refrigeration system using co2 refrigerant for convenience store
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/32a48af777fd43e38853e6942dab558e
work_keys_str_mv	AT yukioyamaguchi developmentofbinaryrefrigerationsystemusingco2refrigerantforconveniencestore AT kenjiamagai developmentofbinaryrefrigerationsystemusingco2refrigerantforconveniencestore
_version_	1718409709905510400

Development of binary refrigeration system using CO2 refrigerant for convenience store

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