An Experimental Investigation of Ternary Refrigerant Blends Performance Proposed as Substitutes for CFC-12

In this paper, the performance of various concentrat~ons, of the proposed blends, as alternatives to CFC-12_, are evaluated under different operating conditions from thermal capacity, as well as coefficient of performance point of view. Other cycle characteristics, such as pressure ratio, system pressures, temperatures and compressor power are also discussed. This has been accomplished with the help of a fully instrumented br~ne/water vapor-compression experimental rig. Results obtained after extensive detailed experimental work, indicated that the performance of the proposed blends, has a strong dependency on the blends concentrations. Furthermore, the proposed blends appear to have superior performance over CFC-12, in both refrigeration and air conditioning applicat~ons. On the other hand, it has been observed that the proposed blends experience slightly higher pressures than CFC-12.