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为开发出一种适用于太阳能吸附制冷的高性能吸附剂,利用浸泡的方法制作了硅胶/氯化钙复合吸附剂,并对吸附剂的吸附性能进行了实验测试。结果表明:与硅胶相比,复合吸附剂不论是吸附量还是吸附速率都有大幅度提高,在相对湿度20%,吸附20min时,硅胶的吸附量为1.96g/100g吸附剂,而复合吸附剂的吸附量为8.08g/100g吸附剂。用制备的复合吸附剂制作一台小型吸附制冷机并进行测试,当热源温度为90℃,冷却水温度为35℃时,在整个循环周期内(15min),制冷功率为1.03kW,单位质量吸附剂的制冷功率(SCP)为128.3W/kg,COP为0.27,说明复合吸附剂用于太阳能吸附制冷机是可行的。
In order to develop a high-performance adsorbent suitable for solar adsorption refrigeration, a silica gel / calcium chloride composite adsorbent was prepared by immersion method, and the adsorption performance of the adsorbent was experimentally tested. The results showed that compared with silica gel, the adsorption capacity and adsorption rate of the composite adsorbent increased greatly. At 20% relative humidity and 20 min adsorption, the adsorption capacity of silica gel was 1.96g / 100g adsorbent, while the composite adsorbent The adsorption capacity was 8.08 g / 100 g adsorbent. A small adsorption refrigerator was prepared and tested with the prepared composite adsorbent. When the heat source temperature was 90 ℃ and the cooling water temperature was 35 ℃, the cooling power was 1.03kW during the whole cycle (15min) The cooling power (SCP) of the agent was 128.3W / kg and the COP was 0.27, which indicated that the composite adsorbent was feasible for solar adsorption refrigerator.