Theoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston

Abstract Vapor‐compression refrigeration systems are widely used in refrigeration equipment. Theoretically, the process is typically divided into two isobaric processes: an adiabatic isentropic compression process and adiabatic isentropic throttling process. The refrigeration compressor is the main...

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Autores principales:	Yu Hu, Weiqing Xu, Teng Ren, Maolin Cai, Bo Yang, Yan Shi
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	COP heat transfer index isothermal compression vapor‐compression refrigeration Technology T Science Q
Acceso en línea:	https://doaj.org/article/96ed58eb038f4f61886ee4e531b7d02b
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spelling	oai:doaj.org-article:96ed58eb038f4f61886ee4e531b7d02b2021-12-02T05:24:30ZTheoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston2050-050510.1002/ese3.984https://doaj.org/article/96ed58eb038f4f61886ee4e531b7d02b2021-12-01T00:00:00Zhttps://doi.org/10.1002/ese3.984https://doaj.org/toc/2050-0505Abstract Vapor‐compression refrigeration systems are widely used in refrigeration equipment. Theoretically, the process is typically divided into two isobaric processes: an adiabatic isentropic compression process and adiabatic isentropic throttling process. The refrigeration compressor is the main energy‐consuming component in vapor‐compression refrigeration systems. However, this device has a large energy loss and low overall efficiency in the adiabatic isentropic compression process. In this study, a modified vapor‐compression refrigeration cycle with an isothermal piston is proposed to realize near‐isothermal compression of a refrigerator to significantly reduce the energy loss in the compression process and improve the system performance. A real‐gas compression process model is established, and the heat transfer index Hex is set. By changing the heat transfer index Hex, the performances of the vapor‐compression refrigeration system under ideal and real compression conditions are compared and analyzed. Compared with a traditional vapor‐compression refrigeration system, the coefficient of performance of the compressor with an isothermal compression process is increased by approximately 17%. The results also demonstrate that the lower the evaporation temperature Te and higher the condensation temperature Tc, the greater the optimization effect of the isothermal compression.Yu HuWeiqing XuTeng RenMaolin CaiBo YangYan ShiWileyarticleCOPheat transfer indexisothermal compressionvapor‐compression refrigerationTechnologyTScienceQENEnergy Science & Engineering, Vol 9, Iss 12, Pp 2321-2332 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	COP heat transfer index isothermal compression vapor‐compression refrigeration Technology T Science Q
spellingShingle	COP heat transfer index isothermal compression vapor‐compression refrigeration Technology T Science Q Yu Hu Weiqing Xu Teng Ren Maolin Cai Bo Yang Yan Shi Theoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston
description	Abstract Vapor‐compression refrigeration systems are widely used in refrigeration equipment. Theoretically, the process is typically divided into two isobaric processes: an adiabatic isentropic compression process and adiabatic isentropic throttling process. The refrigeration compressor is the main energy‐consuming component in vapor‐compression refrigeration systems. However, this device has a large energy loss and low overall efficiency in the adiabatic isentropic compression process. In this study, a modified vapor‐compression refrigeration cycle with an isothermal piston is proposed to realize near‐isothermal compression of a refrigerator to significantly reduce the energy loss in the compression process and improve the system performance. A real‐gas compression process model is established, and the heat transfer index Hex is set. By changing the heat transfer index Hex, the performances of the vapor‐compression refrigeration system under ideal and real compression conditions are compared and analyzed. Compared with a traditional vapor‐compression refrigeration system, the coefficient of performance of the compressor with an isothermal compression process is increased by approximately 17%. The results also demonstrate that the lower the evaporation temperature Te and higher the condensation temperature Tc, the greater the optimization effect of the isothermal compression.
format	article
author	Yu Hu Weiqing Xu Teng Ren Maolin Cai Bo Yang Yan Shi
author_facet	Yu Hu Weiqing Xu Teng Ren Maolin Cai Bo Yang Yan Shi
author_sort	Yu Hu
title	Theoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston
title_short	Theoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston
title_full	Theoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston
title_fullStr	Theoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston
title_full_unstemmed	Theoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston
title_sort	theoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/96ed58eb038f4f61886ee4e531b7d02b
work_keys_str_mv	AT yuhu theoreticalstudyontheapplicationofisothermalcompressiontechnologyinvaporcompressionrefrigerationsystemswithanisothermalpiston AT weiqingxu theoreticalstudyontheapplicationofisothermalcompressiontechnologyinvaporcompressionrefrigerationsystemswithanisothermalpiston AT tengren theoreticalstudyontheapplicationofisothermalcompressiontechnologyinvaporcompressionrefrigerationsystemswithanisothermalpiston AT maolincai theoreticalstudyontheapplicationofisothermalcompressiontechnologyinvaporcompressionrefrigerationsystemswithanisothermalpiston AT boyang theoreticalstudyontheapplicationofisothermalcompressiontechnologyinvaporcompressionrefrigerationsystemswithanisothermalpiston AT yanshi theoreticalstudyontheapplicationofisothermalcompressiontechnologyinvaporcompressionrefrigerationsystemswithanisothermalpiston
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Theoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston

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