In this paper, the performance of an organic Rankine cycle with a zeotropic mixture as a working fluid was evaluated using exergy-based methods: exergy, exergoeconomic, and exergoenvironmental analyses. The effect of system operation parameters and mixtures on the organic Rankine cycle’s performance was evaluated as well. The considered performances were the following: exergy efficiency, specific cost, and specific environmental effect of the net power generation. A multi-objective optimization approach was applied for parametric optimization. The approach was based on the particle swarm algorithm to find a set of Pareto optimal solutions. One final optimal solution was selected using a decision-making method. The optimization results indicated that the zeotropic mixture of cyclohexane/toluene had a higher thermodynamic and economic performance, while the benzene/toluene zeotropic mixture had the highest environmental performance. Finally, a comparative analysis of zeotropic mixtures and pure fluids was conducted. The organic Rankine cycle with the mixtures as working fluids showed significant improvement in energetic, economic, and environmental performances.

中文翻译：

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具有非共沸混合物的有机朗肯循环的基于火用的多目标优化

在本文中，使用基于火用的方法评估了以共沸混合物作为工作流体的有机朗肯循环的性能：火用、火用经济和火用环境分析。系统操作参数和混合物对有机朗肯循环性能的影响也进行了评估。考虑的性能如下：净发电的火用效率、特定成本和特定环境影响。多目标优化方法被应用于参数优化。该方法基于粒子群算法来寻找一组帕累托最优解。使用决策方法选择了一个最终的最佳解决方案。优化结果表明环己烷/甲苯共沸混合物具有较高的热力学和经济性能，而苯/甲苯共沸混合物的环保性能最高。最后，对共沸混合物和纯流体进行了比较分析。以混合物为工作流体的有机朗肯循环在能量、经济和环境性能方面表现出显着改善。