Simulation of A Self-Regenerated Absorption Cycle for High Efficiency, Using Ammonia-Water System

This research focuses on the“GAX CYCLE”（Generator-Absorber heat exchange cycle）， using ammonia-water for improving the efficiency of absorption cycles suited to this refrigerant and airsource heat pumps， with the main objective of clarifying the applicability of this by computer simulation。GAX CYCLE is a variation of the single effect cycle， with several changes in the heat transfer mode， namely LLE-> GHE-> GHE-> GAX。在每一个热量转移模式下。在不同的利率下，热量效率增加了。它被确认为，在两种吸收和吸收的结束时，温度对COP的总热量产生了更多的影响;它也被确认为，在发生器和吸收器之间的热量变化的量有一个强烈和积极的影响，因为从那时起，在整个周期的效率上有一个绵羊增加了在整个热量变化的总数量在同一时间或GAX热量交换过程中。它还发现了这样一种情况，即集中度在太宽的范围内可能会导致热平衡不匹配的结果，而且对GAX循环的有效性有很大的影响。

This research focuses on the "GAX CYCLE"(Generator-Absorber heat exchange cycle), using ammonia-water for improving the efficiency of absorption cycles suited to this refrigerant and airsource heat pumps, with the main objective of clarifying the applicability of this by computer simulation.The GAX CYCLE is a variation of the single effect cycle, with several changes in the heat transfer mode, namely LLE-> GHE-> GHE・AHE-> GAX. At each heat transfer mode. the heat efficiency increases at a different rate. It was confirmed that the temperatures at the end of both absorption and condensation are more influential to the COP than the evaporation temperature.It was also confirmed that the amount of heat exchanged between generator and absorber has a strong and positive influence on the overall cycle efficiency since there is a sheep increase in the total amount of heat exchanged at the onset or the GAX heat exchange process.Furthermore, it was also found that varying the concentration over too broad a range may result in a heat-balance mismatch, and is hence detrimental to the GAX cycle efficiency.