- 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.