耦合吸附吸收制冷系统的实现及其特性

Realization and Performance of Refrigeration System Coupling Adsorption with Absorption

针对现有吸附制冷系统采用单组分工质作为吸附质导致系统的压力偏高或偏低 ,且吸附、吸收式制冷效率较低的状况 ,根据吸收式制冷和吸附式制冷的工作原理及特点 ,提出了耦合吸附吸收制冷的新技术 ;同时分别采用 13X分子筛、氯化钙和硅胶作为吸附剂 ,双组分工质氨 -水为制冷工质 ,在不同脱附温度和氨水含量下进行研究 .实验结果表明 ,与使用单组分工质 -水比较 ,系统性能系数可提高 2倍以上 ;由于将脱附蒸汽的冷凝过程设计成吸收过程 ,因而使系统在常压下运行成为可能 .

To overcome the low refrigeration coefficient in t he adsorption and absorption refrigeration cycles and to overcome the high vacuum or high pressure in the adsorption cycle resulted from the single-component working medium as the adsorbate,a new refrigeration cycle coupling adsorption with absorption was developed based on the principles and characteristics of adsorption and absorption cycles.In this new cycle,13X molecular sieve,calcium chloride and silica gel are respectively selected as adsorbents,and the binary components of NH 3 and H 2O are used as working mediums.The influences of desorption temperature and ammonia content on the coefficient of performance were also analyzed.The results show that,compared to the single-component working medium,the coefficient of performance of the binary coupling system is improved by more than 2 times,and that the novel refrigeration cycle can run in ambient pressure when the condensation process with vapor desorption is used as the absorption process.This work provides a theoretical basis for developing refrigerators with high efficiency and low cost.