Abstract:

A single-bed adsorption refrigeration experimental system with the working-pair of activated carbon-methyl alcohol was built.And investigations on the effect of desorption temperature and desorption time on the desorption amount of refrigerant in cylindrical adsorption tube were conducted.The desorption temperature was set at 84, 89 and 94℃, and the desorption was last for 4, 5, 6 and 7 h, respectively.The experimental results indicate that desorption temperature, desorption time and the desorption amount of refrigerant had significant effect on the refrigeration recycling performance of the adsorption refrigeration system.The minimum coefficient of performance(COP) of 0.053 was achieved when the heating resource temperature was maintained at 84℃ and the heating time was 4 h.The maximum COP of 0.19 was achieved when the desorption temperature was maintained at 94℃ and desorption time was 6 h.Consequently, 94℃ and 6 h were recommended as the optimal desorption temperature and desorption time.If the desorption time was continuously increased to be more than 6 h, the increasing rate of desorption amount would be less than that of energy consumption, then COP will consequently decrease.

Key words: adsorption refrigeration, activated carbon-methyl alcohol, desorption amount, COP, adsorption, desorption

摘要：

搭建了以活性炭-甲醇为工质对的单床吸附式制冷实验系统，对圆柱形吸附管内的吸附剂在不同解吸温度和不同解吸时间条件下的解吸量进行实验研究。解吸温度分别为84、89、94℃，解吸时间分别为4、5、6、7 h。实验结果表明，解吸温度、解吸时间和制冷剂的解吸量对吸附式制冷系统制冷循环性能有着重要影响。在热源温度为84℃加热时间4 h时，系统的制冷性能系数COP最小为0.053。系统在解吸温度为94℃，解吸时间为6 h时，系统的制冷性能系数COP最大为0.19，此时的解吸温度和解吸时间为最佳解吸温度和解吸时间。继续增加解吸时间，解吸量的增长率小于耗能的增长率，COP减小。

关键词: 吸附式制冷, 活性炭-甲醇, 解吸量, COP, 吸附, 解吸