一种新型双效吸收式系统与喷射器及喷射增强压缩制冷循环耦合构型的热力学分析

Abstract In this research, the performance of four novel cascaded refrigeration systems that can provide efficient cooling at lower temperatures along with the reduction of power consumption is investigated. The traditional Double Effect Absorption Refrigeration Cycle cascaded with the conventional Vapor Compression Refrigeration system (VCR) can solve the limitations faced by the standalone cycles. However, these conventional systems have difficulties in utilizing high waste heat recovery and consume high compressor power. Acknowledging their limitations, in our present study, the Double Effect Absorption Refrigeration cycles (Series and Parallel configuration) incorporated with a Refrigerant Heat Exchanger are combined with an advanced ejector integrated VCR to develop advanced Ejector-Double Effect Absorption Cycle (E-DAC (Series), E-DAC (Parallel)) and Ejector Injection-Double Effect Absorption Cycle (EI-DAC (Series), EI-DAC (Parallel)) using LiBr/H 2 O and R41 as the working fluid. The systems are evaluated by assessing the 1st and 2nd law efficiency, with different parameters like required generator load, total input power, and exergy destruction rate. The results indicate that the four suggested systems outperform the traditional cascaded cycles. Among these four combinations, the EI-DAC (Parallel) configuration shows superior performance, with COP improvement of approximately 18% and 14% compared to the conventional Compression Double Effect Absorption Cycle (series and parallel configurations), respectively. The results also point out these system’s sensitivity to different factors like evaporator temperature, entrainment ratio, and ejector’s pressure drop. Moreover, the exergy performance of EI-DAC(Parallel) is roughly 16.7% higher than that of C-DAC(Parallel) and 17.5% higher than that of C-DAC(Series).