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 Exchangers.
Author Bare, J. C. ; Gage, C. L. ; Radermacher, R. ; Jung, D. ;
CORP Author Maryland Univ., College Park. Dept. of Mechanical Engineering.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher c1991
Year Published 1991
Report Number EPA-R-817111; EPA/600/J-93/079;
Stock Number PB93-173664
Additional Subjects Refrigerants ; Refrigerators ; Air pollution abatement ; Heat exchangers ; Freezers ; Environmental chemical substitutes ; Freons ; Fluorohydrocarbons ; Performance evaluation ; Computerized simulation ; Mixtures ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB93-173664 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
The paper discusses a refrigerator/freezer (RF) system that has two complete and independent refrigeration cycles for the two compartments. It uses a non-azeotropic refrigerant mixture (NARM) in each cycle and countercurrent heat exchangers throughout. In a standard cabinet, this RF appears to provide energy savings of 24%, compared to current U.S. RF designs. The NARMs modeled with the best performance included R-32/-152a, R-22/-142b, and R-32/-142b. An 18% improvement can be expected from the dual-circuit system using R-12 alone, and an additional 6% improvement can be gained by replacing R-12 with the selected NARMs in countercurrent heat exchangers. The 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.