In the present work a comparative exergy analysis, multi-objective optimization, as well as extended environmental analysis of a geothermal-based power and refrigeration system, is carried out. Different arrangements with the ammonia-water refrigeration cycle, organic Rankine cycle (ORC), and thermoelectric generator (TEG) are investigated. The current work novelties are the presentation of a novel power-refrigeration system driven by a geothermal source and the employment of TEG units to recover geothermal energy, besides extended environmental assessment. The results of sensitivity analysis indicate that the highest net output work capacity is for the suggested system (configuration 3). Exergy analysis exhibits that in all cases, the absorber has the highest exergy destruction rate and one of the lowest exergy efficiency because it is the first component, which gains the heat from the geothermal source. The suggested system produces 495.2 kW net output power and the highest energy efficiency of 19.42%, which are 131.7 kW, and 3.84% higher than configuration 1(base system). Optimization results represent that in the optimum point, ${\dot{\mathrm{W}}}_{\mathrm{net}}$ shows about 33.3% improvement compared with the un-optimized condition. It is found that configuration 3 which consists of cogeneration with two loops of ammonia-water power cycle with refrigeration system along with an additional thermoelectric generator for enhanced waste heat recovery has the highest environmental footprints because of multiple components installed that would occupy more space, electricity, materials, and other resources for its construction, operation, maintenance, and end-of-life.

在目前的工作中，对基于地热的电力和制冷系统进行了比较火用分析、多目标优化以及扩展环境分析。研究了氨水制冷循环、有机朗肯循环 (ORC) 和热电发电机 (TEG) 的不同布置。目前的工作新颖之处在于介绍了一种由地热源驱动的新型电力制冷系统，以及使用 TEG 装置回收地热能，以及扩展的环境评估。敏感性分析的结果表明最高净输出工作能力是针对建议的系统（配置 3）。火用分析表明，在所有情况下，吸收器具有最高的火用破坏率和最低的火用效率之一，因为它是从地热源获取热量的第一部件。建议系统产生495.2 kW的净输出功率和19.42%的最高能效，为131.7 kW，比配置1（基础系统）高3.84%。优化结果表明，在最佳点，${\dot{\mathrm{宽}}}_{\mathrm{网}}$与未优化的条件相比，显示了大约 33.3% 的改进。发现配置 3 包括热电联产和制冷系统的两个氨水动力循环回路以及用于增强废热回收的附加热电发电机，其环境足迹最高，因为安装的多个组件将占用更多空间、电力、材料和其他资源用于其建造、运行、维护和报废。