Comprehensive evaluation model combined with genetic algorithm for the study on the performance of ORC system with zeotropic mixture

被引：0
|
作者：
Dang Y. [1 ]
Mo C. [1 ]
Shi K. [1 ]
Fang Y. [1 ]
Zhang Z. [1 ]
Li Z. [1 ]
机构：
[1] College of Mechanical Engineering, Guangxi University, Guangxi, Nanning
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 05期
关键词：
AHP-sum-product method; comprehensive evaluation; organic Rankine cycle; zeotropic mixtures;
D O I：
10.11949/0438-1157.20221492
中图分类号：
学科分类号：
摘要：
The system uses R601a/R600 as the working fluid to recover industrial waste heat. It uses the thermodynamic performance (output power Wnet, thermal efficiency ηth and exergy efficiency εex), economic performance (investment cost payback period ICPP, heat exchanger area per unit power output APR), and environmental impact (emissions of CO2 equivalent ECE, environmental exergy cost Exc) as evaluation indicators, and the weights of different evaluation indicators are determined by the AHP-sum-product method and combined with the genetic algorithm to conduct comprehensive analysis and optimization of the system. The results show that when the weight of the objective functions of the comprehensive evaluation index F1 is in the following order: environmental impact > economic performance > thermodynamic performance. When the mass fraction ratio of R601a/R600 is 0.33%/99.67% and the evaporation temperature is 137.2℃, Wnet, ηth, εex, APR, ICPP, ECE and Exc are 62.9 kW, 15.8%, 48.7%, 4.3 m2/kW, 6.6 a, 25.0 t, and 4.0 W, respectively. The ECE and Exc obtained are reduced by 45.9% and 57.0%, respectively, compared with those obtained by TOPSIS based on balanced weight. This shows that F1 pays more attention to environmental impact, and can give more reference plans for actual projects according to different weights, which is more instructive than traditional TOPSIS. © 2023 Chemical Industry Press. All rights reserved.
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页码：1884 / 1895
页数：11
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