Glide Matching With Binary and Ternary Zeotropic Refrigerant Mixtures. Part 1. An Experimental Study.
Glide Matching With Binary and Ternary Zeotropic
Refrigerant Mixtures. Part 1. An Experimental Study.
Mulroy, W. J.; Domanski, P. A.; Didion, D. A.
International Journal of Refrigeration, Vol. 17, No. 4,
refrigerants; temperature profiles; heat transfer;
enthalpy; tests; simulation
An improvement of the coefficient of performance (COP)
of the refrigeration cycle can be realized when
temperature profiles of the refrigerant mixture and the
heat transfer fluid (HTF) are matched. For the same
temperature lift, the benefit of glide matching
increases as the application glide increases.
High-glide binary mixtures composed of components far
apart in boiling points tend to have a non-linear
relationship between temperature and enthalpy in the
two-phase region. The introduction of an intermediate
boiler as a third component can linearize this
relationship and, theoretically, increase the cycle COP
when heat-source and heat-sink fluids are substantially
linear (e.g., water, brines, dry air). The research
described in this paper was directed at exemplifying
this characteristic of ternary mixtures by experimental
evaluation of the performance of a R23/142b binary
mixture and an R23/22/142b ternary mixture in a generic
laboratory breadboard refrigeration system.