Irreversibility Analysis of R407C, R404A, and R134A as an Alternatives of R22 in Vapor Compression Chiller under Cycling Conditions

IF 0.9 Q4 THERMODYNAMICS

International Journal of Thermodynamics Pub Date : 2021-02-28 DOI:10.5541/IJOT.797614

Ayad Khudhair Al-Nadawi

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.

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R407C、R404A和R134A作为R22替代品在循环条件下的不可逆性分析

本文利用R22、R407C、R404A和R-134A作为工质的蒸汽压缩制冷机系统的实验数据进行了不可逆性分析。系统在循环工况下运行，使水在蒸发器中循环，每十分钟记录一次数据。在不同的水温和环境温度下进行了实验研究，找出了导致能量劣化的参数。研究结果表明，在高水流量条件下，总不可逆性增大。此外，高环境温度增加了系统的不可逆性。R134A和R407C在循环条件下的不可逆性分析方面是R22的良好替代品。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Thermodynamics THERMODYNAMICS-

CiteScore

1.50

自引率

12.50%

发文量

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.