The present work aim is performance improvement of an integrated geothermal system by proposing the integration of organic Rankine flash cycle (ORFC) with the Proton exchange membrane fuel cell (PEMFC) and waste heat recovery from condensers using thermoelectric generator (TEG) modules. To achieve this goal, a novel integrated system is proposed, thermodynamically modeled, investigated, and compared with the conventional system. To assess the performance of proposed system, thermodynamic and economic evaluations are performed. The results indicate that R123 as working fluid, has the best performance for the conventional and proposed systems. The findings demonstrate that with employing TEG modules an increase of 2.7% and 2.8%, for the first and second law efficiencies can be obtained respectively. Additionally, the results of parametric analysis indicate that however the geothermal fluid temperature increment decreases the first and second law efficiencies of the system, it leads to the net output power enhancement. Also, enhancement of the flash vessel pressure ratio increases the first and second law efficiency as well. Additionally, the simple payback method showed that a payback time between 1.25 years and 25 years according to the TEG modules cost can be achieved.

本工作目标是通过提出有机朗肯闪速循环（ORFC）与质子交换膜燃料电池（PEMFC）的集成以及使用热电发电机（TEG）模块从冷凝器回收废热的方法，来改善集成地热系统的性能。为了实现这一目标，提出了一种新颖的集成系统，对其进行了热力学建模，研究并与常规系统进行了比较。为了评估所提出系统的性能，进行了热力学和经济评估。结果表明，R123作为工作流体，对于常规和建议系统具有最佳性能。研究结果表明，通过使用TEG模块，第一定律和第二定律效率分别提高了2.7％和2.8％。另外，参数分析的结果表明，然而，地热流体温度的升高会降低系统的第一定律和第二定律效率，从而导致净输出功率的增加。而且，闪蒸容器压力比的增加也提高了第一定律和第二定律效率。此外，简单的投资回收期方法表明，根据TEG模块成本，投资回收期可在1.25年至25年之间。