Record Display for the EPA National Library Catalog


Main Title Simulation of Nonazeotropic Refrigerant Mixtures for Use in a Dual-Circuit Refrigerator/Freezer with Countercurrent Heat Exchanges.
Author Bare, J. C. ; Gage, C. L. ; Radermacher, R. ; Jung, D. S. ;
CORP Author Maryland Univ., College Park. Dept. of Mechanical Engineering.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher 1992
Year Published 1992
Report Number R-817111; EPA/600/A-92/274;
Stock Number PB93-131688
Additional Subjects Refrigerants ; Air pollution abatement ; Environmental chemical substitutes ; Refrigerators ; Computerized simulation ; Pollution sources ; Heat exchangers ; Freezers ; Energy consumption ; Performance evaluation ; Freons ; Fluorohydrocarbons ; Dual cycle cooling systems ; Chlorohydrocarbons ; Nonazeotropic refrigerant mixtures ; Montreal Protocol
Library Call Number Additional Info Location Last
NTIS  PB93-131688 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 25p
The paper discusses the simulation of Non-azeotropic Refrigerant Mixtures (NARMs) for use in a dual-circuit refrigerator/freezer (RF) with countercurrent heat exchangers. The simulated RF has two complete and independent refrigeration cycles for its two compartments. It uses a NARM in each cycle and countercurrent heat exchangers throughout. In a standard cabinet, the RF is simulated to provide energy savings of 24 percent compared to current U.S. RF designs. The NARMs modeled with the best performance are R-32/-152a, R-32/-142b, and R-22/-142b. An 18 percent improvement can be expected from the dual-circuit system using R-12 alone, and an additional 6 percent improvement can be gained by replacing R-12 with the selected NARMs in countercurrent heat exchangers. Advantages of the system include greatly reduced energy consumption, easy temperature and humidity control for each compartment, no humidity or odors transferred between compartments, and increased time between defrost cycles. Disadvantages include additional hardware requirements, compressor size, and the difficulties of using a NARM.