R404A直接接触凝结制冷循环的性能分析

发布时间：2019-06-22 16:58

【摘要】：提出R404A直接接触凝结换热的制冷循环,分析R404A直接接触凝结制冷循环的热力性能,并与常规双级压缩制冷循环的性能进行对比。得出结论:在一定的冷凝温度、蒸发温度和过冷液体的过冷度下,直接接触凝结制冷循环存在最佳的饱和液体温度,并在此最佳的饱和液体温度下,获得最优的性能和最小的冷凝热负荷,随着过冷液体的过冷度增大和蒸发温度升高,直接接触凝结制冷循环的性能系数增加、冷凝热负荷减少,获得最优性能的最佳饱和液体温度值提高。过冷液体的过冷度为25℃时,直接接触凝结制冷循环的最佳性能系数较双级压缩制冷循环的最佳性能系数提高6.2%。直接接触凝结制冷循环的最小冷凝热负荷较双级压缩制冷循环的最小冷凝热负荷减小1.8%。
[Abstract]:The refrigeration cycle of R404A direct contact condensation heat transfer is proposed. The thermodynamic performance of R404A direct contact condensation refrigeration cycle is analyzed and compared with that of conventional two-stage compression refrigeration cycle. It is concluded that there is the best saturated liquid temperature in the direct contact condensation refrigeration cycle under certain condensation temperature, evaporation temperature and undercooling degree of subcooled liquid, and at this optimal saturated liquid temperature, the optimal performance and minimum condensation heat load are obtained. with the increase of supercooling degree and evaporation temperature of supercooled liquid, the performance coefficient of direct contact condensation refrigeration cycle increases and the condensation heat load decreases. The optimum temperature value of saturated liquid with the optimal performance is improved. When the undercooling degree of supercooled liquid is 25 鈩，

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