Exergy Analysis of an Ejector Cooling System by Modified Gouy–Stodola Equation

IF 0.8 Q4 THERMODYNAMICS

International Journal of Air-conditioning and Refrigeration Pub Date : 2021-09-01 DOI:10.1142/s2010132521500279

G. Sachdeva, B. Sharma

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引用次数: 1

Abstract

In this paper, exergy destruction analysis of a heat-assisted ejector cooling system has been carried out using a modified Gouy–Stodola equation. The modified Gouy–Stodola equation provides a more accurate and realistic irreversibility analysis of the system than the conventional Gouy–Stodola formulation. The coefficient of structural bond (CSB) analysis has also been executed to find the component whose operating variables affect the system’s total irreversibility at the most. Exergy analysis revealed that the maximum exergy loss happens in the ejector followed by the generator and condenser. The model predicted 40.84% of total irreversibility in the ejector at the designed conditions. However, total exergy destruction is found to be the most sensitive to the evaporator temperature. The CSB value of 12.97 is obtained in the evaporator using the modified exergy method. The generator appears to be the second sensitive component with the CSB value of 2.42, followed by the condenser with the CSB value of 1.628. The coefficient of performance of the system is found to be 0.18 at the designed conditions. The refrigerant R1234yf is considered in the system.

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用修正的Gouy-Stodola方程分析喷射器冷却系统的火用

本文采用修正的Gouy-Stodola方程对热辅助喷射器冷却系统进行了火用破坏分析。修正后的Gouy-Stodola方程比传统的Gouy-Stodola公式对系统的不可逆性分析更准确、更现实。通过结构键系数(coefficient of structural bond, CSB)分析，找出其运行变量对系统总不可逆性影响最大的组分。火用分析表明，火用损失最大的是喷射器，其次是发电机和冷凝器。该模型预测了设计条件下喷射器总不可逆性的40.84%。然而，发现总火用破坏对蒸发器温度最敏感。采用改进的火用法，蒸发器的CSB值为12.97。发电机似乎是第二个敏感部件，CSB值为2.42，其次是冷凝器，CSB值为1.628。在设计条件下，系统的性能系数为0.18。系统考虑制冷剂为R1234yf。

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 Air-conditioning and Refrigeration THERMODYNAMICS-

CiteScore

2.70

自引率

10.00%

发文量

期刊介绍： As the only international journal in the field of air-conditioning and refrigeration in Asia, IJACR reports researches on the equipments for controlling indoor environment and cooling/refrigeration. It includes broad range of applications and underlying theories including fluid dynamics, thermodynamics, heat transfer, and nano/bio-related technologies. In addition, it covers future energy technologies, such as fuel cell, wind turbine, solar cell/heat, geothermal energy and etc.