A refrigeration system was developed which combines a basic vapor compression refrigeration
cycle with an ejector cooling cycle. The ejector cooling cycle is driven by the waste
heat from the condenser in the vapor compression refrigeration cycle. The additional
cooling capacity from the ejector cycle is directly input into the evaporator of the vapor
compression refrigeration cycle. The governing equations are derived based on energy and
mass conservation in each component including the compressor, ejector, generator,
booster and heat exchangers. The system performance is first analyzed for the on-design
conditions. The results show that the COP is improved by 9.1% for R22 system. The
system is then compared with a basic refrigeration system for variations of five important
variables. The systemanalysis shows that this refrigeration system can effectively improve
the COP by the ejector cycle with the refrigerant which has high compressor discharge
temperature.