This paper aims to provide a performance examination of combining power and refrigeration system, which consists of an Organic Rankine Cycle driven Vapor Compression Cycle from waste heat source. The following working fluids R123, R11, and R113 were assessed from thermodynamic and economic standpoints. The numerical model of the system is developed under Engineering Equation Solver software. Thermal and exergy efficiencies of the combined system are selected to establish the thermodynamic analysis. The economic evaluation was based on three indicators, namely net earnings, payback period, and levelized cost of energy. In order to examine the trade-off between thermodynamic and economic performance, a multi-objective optimization supported by a decision-making process is investigated. Moreover, a parametric study is carried out to determine the effect of several parameters such as boiler and condenser temperatures and mass flow rate on the system performance. The optimized results indicate that the highest energy and exergy efficiencies using R123 as working fluid are over 1.02 and 0.53 respectively, while the payback period is 6.3 years. Additionally, the levelized cost of energy is 0.06 $/kWh at heat source temperature of 150 °C, condenser temperature of 25 °C and turbine inlet pressure of 2 MPa.

本文旨在提供一种动力和制冷组合系统的性能测试，该系统由来自废热源的有机朗肯循环驱动的蒸汽压缩循环组成。以下工作流体 R123、R11 和 R113 从热力学和经济角度进行了评估。该系统的数值模型是在工程方程求解软件下开发的。选择组合系统的热效率和火用效率来建立热力学分析。经济评价基于三个指标，即净利润、投资回收期和能源平准化成本。为了检查热力学和经济性能之间的权衡，研究了由决策过程支持的多目标优化。而且，进行参数研究以确定几个参数（例如锅炉和冷凝器温度以及质量流量）对系统性能的影响。优化结果表明，使用R123作为工质的最高能效和火用效率分别超过1.02和0.53，投资回收期为6.3年。此外，在热源温度为 150 °C、冷凝器温度为 25 °C 和涡轮进口压力为 2 MPa 时，能源的平准化成本为 0.06 美元/千瓦时。