Exergy analysis of a compression-absorption cascade system for refrigeration

被引：39

作者：

Colorado, D. ^{[1
]}

Velazquez, V. M. ^{[2
]}

机构：

[1] Univ Veracruzana, Ctr Invest Recursos Energet & Sustentables, Coatzacoalcos 96535, Veracruz, Mexico

[2] Univ Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca 62209, Morelos, Mexico

来源：

INTERNATIONAL JOURNAL OF ENERGY RESEARCH | 2013年 / 37卷 / 14期

关键词：

irreversibilities; R134a; water lithium bromide; ammonium; ENERGY;

D O I：

10.1002/er.3012

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A compression-absorption cascade system for refrigeration is simulated with different working fluids. LiBr/H2O is used in the absorption cycle and ammonium, R134a and carbon dioxide are evaluated in the compression cycle. First and second laws of thermodynamic analysis were analyzed with the aim of finding the best working fluid performance and appropriate operation parameters. Coefficient of performance, exergetic efficiency, irreversibility of the main components of the system, total irreversibility of the system and improvement potential were estimated for each one of the systems proposed. The results showed that the highest irreversibilities occurred in the cascade heat exchanger using carbon dioxide or ammonium, but this value decreased by using R134a. The highest value of coefficient of performance is observed by the R134a-LiBr/H2O system when the minimum of irreversibility in the absorber and generator are reached within a range of generator temperature from 339 to 345K. Copyright (c) 2013 John Wiley & Sons, Ltd.

引用

页码：1851 / 1865

页数：15

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