【作者】 鲍帅阳； 杜垲； 储云霄； 武云龙； 鄂文汲；

【Author】 Bao Shuaiyang;Dukai;Chu Yunxiao;Wu Yunlong;E Wenji;School of energy and environment,Southeast University;

【机构】 东南大学能源与环境学院；

【摘要】 针对氨水吸收/压缩复合制冷循环的方式不同,结合Schulz氨水溶液状态方程,分别对压缩机处于系统高压区和低压区两种不同的组合方式进行了理论分析计算。分析了蒸发温度、热源温度、冷却水温度和中间压力对两种组合方式下压缩机当量热耗量和热源耗热量的影响,并与单级氨水吸收制冷循环的性能系数做了比较。结果表明,压缩机当量热耗量对循环性能的影响要低于热源耗热量的影响;压缩机处于系统高压区时循环的一次用能量要明显高于压缩机处于系统的低压区;在中间压力给定时,存在一个最佳热源温度,使得氨水吸收/压缩复合制冷循环的性能系数取得最大值;随任一温度参数变化时,压缩机处于高压区时的性能系数总会出现低于单级氨水吸收循环性能系数的临界点;而压缩机处于系统低压区时循环的性能系数要高于高压区循环和单级氨水吸收循环。更多还原

【Abstract】 Different compressor adding ways in the ammonia-water absorption/compression combined refrigeration(AWAC) cycle have different effects on the overall performance of the cycle.The theoretical analysis and calculations on two combination ways,namely,adding the compressor in high-pressure area and in lowpressure area,have been conducted respectively.The effect on the equivalent heat consumption in compression qCW,heat consumption in absorption qG and the system COP by several factors,including the evaporation temperature Te,heat-source temperature Th and as well as the cooling water temperature Tw are analyzed in two combination configurations above,and also compared with performance of the single-stage cycle.The results show that,the effect caused by the equivalent heat consumption in compression on COP is less than that by the heat consumption in absorption.Besides,it is obvious that compressor set in high-pressure area uses more energy than that of in low-pressure area.Under each certain value of intermediate pressure,there is an optimum heatsource temperature corresponding to the maximum COP of the AWAC cycle.With each temperature parameter changes,there always exits a critical point which the COP of compressor set in high-pressure area lower than single-stage ammonia-water absorption cycle.Moreover,compressor in low-pressure area is superior to that in high-pressure area and the single-stage cycle in the perspective of COP.更多还原