||The performance of chlorine-free binary zeotropic refrigerant mixtures in a heat pump /
Pannock, Jèurgen. ;
Pannock, Jurgen. ;
Didion., D. A.
||National Inst. of Standards and Technology (BFRL), Gaithersburg, MD.;Electric Power Research Inst., Palo Alto, CA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
|| U.S. Environmental Protection Agency ;
||EPA/600/R-92/107; NISTIR 4748; EPA/600/R-92/017
Heat pumps ;
Heat transfer ;
Binary mixtures ;
Heat exchangers ;
Thermodynamic properties ;
Computerized simulation ;
Performance evaluation ;
Test methods ;
Test facilities ;
Zeotropic refrigerant mixtures
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||xiii, 73 pages : illustrations ; 28 cm.
The phase-out of the currently used refrigerants during the next decade requires fast and accurate methods to evaluate possible alternatives for the existing refrigerants. The report investigates possible replacement refrigerants for R22, where the replacements are binary zeotropic mixtures of the following hydrofluorocarbons (HFCs): R23, R32, R125, R134a, and R152a. The method, that was chosen, is based on three steps: (1) determining possible mixture components, (2) evaluating all fifteen possible mixtures using a simulation program developed by NIST and determining the best performing mixtures, (3) evaluating the best performing mixtures in a NIST build test facility. Following the path, two refrigerant mixtures, R32/R134a and R32/R152a were found to perform better than R22 with respect to COP and volumetric capacity for certain composition ranges. The used simulation model proved to be a very precise tool in finding possible replacement fluids and their possible performance advantages. The results give the confidence that this time saving combination of simulation and testing is a very powerful engineering tool.
"Prepared for Electric Power Research Institute [and] U.S. Environmental Protection Agency, Air & Energy Engineering Research Laboratory." "December 1991." Includes bibliographical references (page 36). "EPA-600-R-92-017." Microfiche.