VAPOR COMPRESSION AND ADSORPTION HYBRID REFRIGERATION UTILIZING CO{sub}2 AND COMPARE WITH R134a BASED COMPRESSION REFRIGERATION SYSTEM

摘要

In this article, we have described a novel hybrid refrigeration system that is (i) compact, (ii) free of toxic and environmentally-harmful substances, and (iii) high coefficient of performance, and combines symbiotically the processes of mechanical vapor compression and solid vapor adsorption, where carbon dioxide (CO{sub}2) is used as the refrigerant and functional activated carbon (type Maxsorb III) is for adsorbent. The present simulation results show that the proposed system can attain large cooling power at high coefficient of performance (COP). The performance results of the hybrid system are also compared with R134a based vapor compression refrigeration system and found that the COP of hybrid cycle is approximately two times higher for the same cooling capacity. This proposed hybrid system is targeted for automobile air-conditioning and the adsorption system of the hybrid system is powered by the exhaust heat from the automobile engine.