DE-93-06-2 -- Thermodynamic Evaluation of R-22 Alternative Refrigerants and Refrigerant Mixtures PDF

Presents the performance evaluation of nine R22 alternatives. The study was conducted using a semi-theoretical model, CYCLE-11, with a pure cross-flow representation of heat transfer in the evaporator and condenser. The Carnahan-Starling-DeSantis equation of state was used for calculating thermodynamic properties. Transport properties were not involved in the simulations. Simulations were conducted for "drop-in" performance, for performance in a modified system to assess the fluids' potentials, and for performance in a modified system equipped with a liquid-line/suction-line heat exchanger. The results - presented on a relative basis to R22 performance - include the volumetric capacity, coefficient of performance (COP), and compressor discharge pressure and temperature.

KEYWORDS: refrigerants, R22, models, thermodynamics, constant, heat exchangers, computer programs, comparing, performance, mixtures.