- Author
- Kim, M. H. | Domanski, P. A. | Didion, D. A.
- Title
- Performance of R-22 Alternative Refrigerants in a System With Cross-Flow and Counter-Flow Heat Exchangers.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Sponsor
- Department of Energy, Washington, DC
- Report
- NISTIR 5945, January 1997, 31 p.
- Distribution
- Available from National Technical Information Service
- 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.