Environmental issues have attracted greater concerns, leading to more efforts being devoted to industrial waste heat and renewable energy utilization fields. The reverse electrodialysis heat engine is an emerging method to improve the efficiency of industrial processes by recovering waste heat to generate electricity. Besides, it can also be used to harvest low-grade heat in the renewable energy field, such as solar power, geothermal and ocean thermal energy. Its predominating advantage is to harvest low-grade heat with temperatures below 100 °C, which other power generation techniques can hardly utilize. However, the low efficiency of heat to salinity gradient power conversion and poor property of conventional solution has constrained its application. A cycle using unconventional working fluid LiBr solution is developed and experimentally validated to study the heat to salinity gradient power conversion. Influences of the condensation temperature, generation temperature, temperature of reverse electrodialysis cells, and charge concentration were investigated through energy and exergy analysis. The generation process is divided into two sub-stages during the analysis, namely the solution preheat stage and the solution separation stage. It is concluded that an increase in the energy consumption in the solution separation stage and a decrease in the energy consumption in the solution preheat stage can enhance both the energy and exergy efficiencies of the system. The maximum energy efficiency of 6.05% and exergy efficiency of 56.55% are obtained at respective conditions. Moreover, recovering 49.22% condensate heat for solution preheating would increase the energy efficiency by 173.74% at the basic working condition.

环境问题引起了更大的关注，导致更多的精力投入到工业余热和可再生能源利用领域。反电渗析热机是一种通过回收废热发电来提高工业过程效率的新兴方法。此外，还可用于太阳能、地热、海洋热能等可再生能源领域的低品位热能的采集。它的主要优势是收集温度低于 100°C 的低级热量，这是其他发电技术几乎无法利用的。然而，热盐梯度功率转换效率低和常规解决方案性能差限制了其应用。开发了一种使用非常规工作液溴化锂溶液的循环，并通过实验验证，以研究热盐度梯度功率转换。通过能量和火用分析研究了冷凝温度、发生温度、反电渗析池温度和电荷浓度的影响。在分析过程中，生成过程分为两个子阶段，即溶液预热阶段和溶液分离阶段。结论是，增加溶液分离阶段的能量消耗和减少溶液预热阶段的能量消耗可以提高系统的能量和火用效率。在各自的条件下获得了 6.05% 的最大能量效率和 56.55% 的火用效率。此外，恢复49。