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A Water-to-Water Heat Pump Using Hydrocarbon and Hydrofluorocarbon Zeotropic Mixtures With and Without an Internal Heat Exchanger

Published

Author(s)

William V. Payne, Piotr A. Domanski, E A. Silk

Abstract

This investigation overviews the comprehensive results of the experimental study pertaining to flammable refrigerant alternatives in water-to-water heat pumps for building and home applications. In contrast to the comprehensive fluid survey of the initial study (NISTIR 6330, 1999), the present study emphasizes the performance of R32/290, R22, R290, and R22-REF (direct expansion case) in the cooling and heating modes. The vapor compression cycle used had an internal heat exchanger added. Fluid performance as a function of thermophysical properties and heat transfer characterisitics are addressed for each cycle configuration.The system charged with R32/290 had the closest performance to the R22 direct expansion system in the cooling mode. Furthermore, the internal heat exchange system performance exceeded that of the basic vapor compression cycle configuration. In the heating mode, R290 in the basic configuration had the closest approximation to the R22 direct expansion performance. The application of the internal heat exchanger degraded R290's performance.
Citation
NIST Interagency/Internal Report (NISTIR) - 6449
Report Number
6449

Keywords

COP, flammable refrigerants, water-to-water heat pump, zeotropic mixtures

Citation

Payne, W. , Domanski, P. and Silk, E. (2000), A Water-to-Water Heat Pump Using Hydrocarbon and Hydrofluorocarbon Zeotropic Mixtures With and Without an Internal Heat Exchanger, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.6449, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860803 (Accessed June 23, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created December 31, 1999, Updated October 12, 2021