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Performance of R-22 Alternative Refrigerants in a System With Cross-Flow and Counter-Flow Heat Exchangers.


pdf icon Performance of R-22 Alternative Refrigerants in a System With Cross-Flow and Counter-Flow Heat Exchangers. (348 K)
Kim, M. H.; Domanski, P. A.; Didion, D. A.

NISTIR 5945; 31 p. January 1997.

Sponsor:

Department of Energy, Washington, DC

Available from:

National Technical Information Service
Order number: PB97-138259

Keywords:

air conditioning; heat pumps; heat transfer; refrigerants; refrigeration; thermodynamics

Abstract:

This report presents results of performance tests of R-22 and four alternative fluids, R-134a, R-32/134a (30/70), R-407C, and R-410A, at operating conditions typical for a residential heat pump. The study was performed in an experimental breadboard water-to-water heat pump in which a water/ethylene glycol mixture was used as the heat-transfer fluid. The heat exchangers representing the indoor and outdoor coils were counter-flow and cross-flow, respectively. The cooling tests were conducted for all five fluids, and the heating tests were run for R-22 and R-407C. The report presents test results for the system and data characterizing the performance of the heat exchangers and compressor. The zeotropic mixtures, R-32/134a and R-407A had similar performance characteristics as R-22. At tests performed at the same capacity, R-410A had the highest Coefficient of Performance.