Glide Matching With Binary and Ternary Zeotropic Refrigerant Mixtures. Part 2. A Computer Simulation.
Glide Matching With Binary and Ternary Zeotropic
Refrigerant Mixtures. Part 2. A Computer Simulation.
Domanski, P. A.; Mulroy, W. J.; Didion, D. A.
International Journal of Refrigeration, Vol. 17, No. 4,
refrigerants; zeotropic mixtures; boiling point;
refrigerant mixtures; simulation
The glide-matching study presented in Part 1 was a
laboratory investigation which demonstrated the
evaporator performance in detail. However, since it was
not possible to instrument the condenser sufficiently,
some computer simulation work was conducted using a
semi-theoretical model CYCLE-11, which has been under
continual development at NIST for the past five years.
As in the experimental effort, R22,R142b,
R22/142b,R23/22/142b and R23/142b working fluids were
investigated, but the simulation work did not include
heat pump operation with liquid-line/evaporator heat
exchange. By utilizing the model to quantify entropy
generation at various state points within the cycle, it
was possible to locate the likelihood of temperature
profiles pinch points in both the condenser and
evaporator. This information clarified the impact of
non-linearities on the system performance.