Development of high-efficiency water sorption refrigerator using an inorganic salt-supported carbonaceous sorbent

为了提高水吸附式制冷机的制冷量，本文以吸附材料为研究对象，对高密度活性炭纤维（HDACF）和CaCl_2/HDACF复合吸附剂的制备工艺、吸附性能和强化传热性能进行了研究。实验结果表明，以酚醛纤维为原料，经热压成型、炭化和活化处理，可制得不同表观密度的HDACFs。采用溶液浸渍法制备的CaCl_2/HDACFs在较低的水蒸气压范围内具有上级吸水性能。HDACF可以与铝材料如细丝、丝网和细颗粒相结合。这些结果表明HDACF或CaCl_2/HDACF复合吸附剂是一种很有前途的高效水吸附制冷材料。

To improve a cold output from water sorption refrigerators, we focused on sorption materials, and examined HDACF(High-Density Activated Carbon Fiber) and/or CaCl_2/HDACF composite sorbent for preparation procedures, water sorption performances and heat transfer enhancement. Experimental results showed that HDACFs with various apparent densities could be obtained from phenolic fibers by a hot-briquetting, carbonization and activation treatments. CaCl_2/HDACFs, which were easily prepared by a solution impregnation method, have superior water sorption performance in the lower vapor pressure range. HDACF could be combined with aluminum materials such as fine wires, wire mesh and fine particles. These results indicated that HDACF or CaCl_2/HDACF composite sorbent would be promising materials for high efficiency water sorption refrigerators.