Ternary Zeotropic Mixture With CO2 Component for R-22 Heat Pump Application.
Ternary Zeotropic Mixture With CO2 Component for R-22
Heat Pump Application.
(634 K)
Maczek, K.; Muller, J.; Wojtas, K.; Domanski, P. A.
CLIMA 2000 Conference, Proceedings. August 30-September
2, 1997, Brussels, Belgium, 1-9 pp, 1997.
Keywords:
zeotropic mixture; alternative refrigerants; heat pumps;
carbon dioxide
Abstract:
The objective of this research project was to
demonstrate a successful operation of a high efficiency
heat pump employing a zeotropic mixture with a zero
ozone-depletion and a small greenhouse warming potential
(ODP and GWP, respectively). The project addresses the
technical challenges resulting from international
agreements regulating the use of ozone-depleting
substances. The signatory countries of the Montreal
Protocol agreed to phase out production of
chlorine-containing refrigerants with deadlines
depending on the ODP of the fluids. A search for a
proper substitute has to consider factors such as
capacity, efficiency, flammability, oil/refrigerant
solubility, toxicity, etd. This study investigaged
possible R-22 alternatives with the goal of achieving a
comparable system capacity and 10% improvement in
Coefficient of Performance (COP). The tests were
performed in COCH (Refrigerating Machinery Research
Center in Cracow, Poland).
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899