Optimization of exergetic performance and payback period of organic rankine cycle integrated vapor compression refrigeration system based on exergy, economic, and environmental criteria

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-05-16 DOI:10.18186/thermal.1297571

Ashwni Goyal, A. F. Sherwani

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Abstract

In this paper, a multi-objective optimization study is carried out to determine the optimal exergetic performance (𝜂𝑒𝑥) and the payback period (PB) of the organic Rankine cycle (ORC) integrated vapor compression refrigeration (VCR) system based on exergy, economic, and environmental criteria using non-dominated sort genetic algorithm-II (NSGA-II). Moreover, a sensitivity analysis is carried out to improve the exergetic performance of the system. The working fluid, the pinch-point temperature difference of the ORC evaporator (ΔToep ), con-denser (ΔTpcond), and the VCR evaporator (ΔTpve), cooling water inlet temperature (Tcw1), chilled fluid temperature (Tcf2), and heat-source inlet temperature (Th1) are taken as the decision vari-ables. The results of this study indicate that butane is the most suitable working fluid for op-timal exergetic efficiency, 𝜂𝑒𝑥 (33.7%) and payback period, PB (4.9 years) of the system. The optimal values of other decision variables such as Th1, Tcw1, Tcf2, ΔToep , ΔTpve , and ΔTpcondare 378 K, 313 K, 276 K, 10 K, 5 K, and 5 K respectively.

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基于火用、经济和环境标准的有机朗肯循环集成蒸汽压缩制冷系统的火用性能和投资回收期优化

本文采用非支配排序遗传算法-ⅱ(nsga -ⅱ)对有机朗肯循环(ORC)一体化蒸汽压缩制冷(VCR)系统进行了多目标优化研究，以确定系统的最佳火用性能(𝜂𝑒≥)和投资回复期(PB)。此外，为了提高系统的火用性能，还进行了灵敏度分析。以工质、ORC蒸发器(ΔToep)、冷凝器(ΔTpcond)和VCR蒸发器(ΔTpve)的点温差、冷却水进口温度(Tcw1)、冷冻流体温度(Tcf2)和热源进口温度(Th1)为决策变量。研究结果表明，丁烷是系统最优火用效率𝜂𝑒(33.7%)和投资回收期PB(4.9年)最合适的工质。其他决策变量如Th1、Tcw1、Tcf2、ΔToep、ΔTpve、ΔTpcondare的最优值分别为378 K、313 K、276 K、10 K、5 K、5 K。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.