Performance of R-22 Alternative Refrigerants in a System With Cross-Flow and Counter-Flow Heat Exchangers (NISTIR 5945)

Published

January 1, 1997

Author(s)

M H. Kim, Piotr A. Domanski, David Didion

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.

Citation

NIST Interagency/Internal Report (NISTIR) - 5945

Report Number

5945

NIST Pub Series

NIST Interagency/Internal Report (NISTIR)

Pub Type

NIST Pubs

Download Paper

https://doi.org/10.6028/NIST.IR.5945

Local Download

Keywords

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

Citation

Kim, M. , Domanski, P. and Didion, D. (1997), Performance of R-22 Alternative Refrigerants in a System With Cross-Flow and Counter-Flow Heat Exchangers (NISTIR 5945), NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.5945, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910467 (Accessed October 22, 2025)