- Author
- Domanski, P. A. | Didion, D. A.
- Title
- Thermodynamic Evaluation of R-22 Alternative Refrigerants and Refrigerant Mixtures.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Journal
- ASHRAE Transactions: Symposia, Vol. 99, No. 2, 636-648, 1993
- Sponsor
- Department of Energy, Washington, DC
- Report
- DE-93-6-2,
- Contract
- DE-FG-02-91CE23810
- Keywords
- refrigerants | thermodynamics | fluids | heat exchanger loading | heat transfer
- Abstract
- This paper presents the performance evaluation of nine R-22 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. 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-linesuction-line heat exchanger. The results - presented on a relative basis to R-22 performance - include the volumetric capacity, coefficient of performance (COP), and compressor discharge pressure and temperature.