{"title":"Irreversibility Analysis of R407C, R404A, and R134A as an Alternatives of R22 in Vapor Compression Chiller under Cycling Conditions","authors":"Ayad Khudhair Al-Nadawi","doi":"10.5541/IJOT.797614","DOIUrl":null,"url":null,"abstract":"This paper presents irreversibility analysis using experimental data from vapor compression chiller system using R22, R407C, R404A and R-134A as working fluids. The system operated under cycling condition, which allowing the water to circulate in the evaporator and recording data every ten minutes. Further, the experimental study was conducted at different water and ambient temperature to identify the parameter that cause the energy deterioration. The findings show that the total irreversibility increases at high water mass flow rate. Additionally, high ambient temperature increase the irreversibility of the system. R134A and R407C are a good replacement for R22 in terms of irreversibility analysis during cycling condition.","PeriodicalId":14438,"journal":{"name":"International Journal of Thermodynamics","volume":" ","pages":""},"PeriodicalIF":0.9000,"publicationDate":"2021-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Thermodynamics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5541/IJOT.797614","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"THERMODYNAMICS","Score":null,"Total":0}
引用次数: 3
Abstract
This paper presents irreversibility analysis using experimental data from vapor compression chiller system using R22, R407C, R404A and R-134A as working fluids. The system operated under cycling condition, which allowing the water to circulate in the evaporator and recording data every ten minutes. Further, the experimental study was conducted at different water and ambient temperature to identify the parameter that cause the energy deterioration. The findings show that the total irreversibility increases at high water mass flow rate. Additionally, high ambient temperature increase the irreversibility of the system. R134A and R407C are a good replacement for R22 in terms of irreversibility analysis during cycling condition.
期刊介绍：
The purpose and scope of the International Journal of Thermodynamics is · to provide a forum for the publication of original theoretical and applied work in the field of thermodynamics as it relates to systems, states, processes, and both non-equilibrium and equilibrium phenomena at all temporal and spatial scales. · to provide a multidisciplinary and international platform for the dissemination to academia and industry of both scientific and engineering contributions, which touch upon a broad class of disciplines that are foundationally linked to thermodynamics and the methods and analyses derived there from. · to assess how both the first and particularly the second laws of thermodynamics touch upon these disciplines. · to highlight innovative & pioneer research in the field of thermodynamics in the following subjects (but not limited to the following, novel research in new areas are strongly suggested): o Entropy in thermodynamics and information theory. o Thermodynamics in process intensification. o Biothermodynamics (topics such as self-organization far from equilibrium etc.) o Thermodynamics of nonadditive systems. o Nonequilibrium thermal complex systems. o Sustainable design and thermodynamics. o Engineering thermodynamics. o Energy.
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