MnCl_2/CaCl_2-NH_3再吸附系统的制冷性能

Performance of MnCl_2/CaCl_2-NH_3 resorption refrigeration system

利用膨胀硫化石墨为基质研制了固化混合吸附剂,并搭建了低品位热能驱动的MnCl_2/CaCl_2-NH_3为工质对的再吸附制冷系统。对该系统进行实验研究,结果表明:160℃热源温度为制冷性能系数(COP)的拐点温度,最大制冷功率为2.98kW。当热源温度高于160℃时,系统显热负荷增大,继续加热高温床会降低制冷效率。当制冷温度为15℃时,系统COP为0.284~0.396;单位质量吸附剂的制冷功率(SCP)为100.3~338.8W·kg^(-1)。SCP随热源温度的升高而逐渐升高。

The solid composite sorbents based on the matrix of expanded natural graphite treated with sulfuric acid are developed,and a MnCl2/CaCl2-N H 3 resorption refrigeration system driven by low-grade thermal energy is established and experimentally investigated.Results indicate that 1 6 0 ℃ heat source temperature is the inflection temperature of coefficient of performance for refrigeration (COP),and a maximum cooling power of 2.9 8 kW is achieved.When the heating temperature is higher than 1 6 0 ℃ , sensible heat load of the system increases which means keeping heating high temperature salt (H TS)sorption bed will reduce the overall refrigeration efficiency.For refrigeration temperature of 1 5 ℃ ,COP of the system ranges from 0.2 8 4 to 0.3 9 6 while specific cooling power (SCP)ranges from 1 0 0.3 to 3 3 8.8 W · kg - 1.SCP increases with the increment of heat source temperature.