Record Display for the EPA National Library CatalogRECORD NUMBER: 6 OF 32
|Main Title||Comparison of CFC-114 and HFC-236ea Performance in Shipboard Vapor Compression Systems.|
|Author||Ray, D. T. ; Pate, M. B. ; Shapiro, H. N. ;|
|CORP Author||Iowa State Coll., Ames.;Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div.|
|Report Number||EPA-R-820755-01-4; EPA/600/R-97/058;|
|Additional Subjects||Shipboard ; Refrigerants ; Centrifugal compressors ; Comparative evaluations ; Environmental chemical substitutes ; Halohydrocarbons ; Performance evaluation ; Material substitution ; Vapor compression refrigeration cycle ; Evaporators ; Condensers ; Alternatives ; Heat transfer ; Thermodynamics ; Computer models ; Computerized simulation ; HFC-114 ; HFC-236ea ; Chillers|
The report gives results of a comparison of the performance of two refrigerants--1,1, 1,2,3,3-hexafluoropropane (HFC-236ea) and 1,2-dichloro-tetrafluoro-ethane (CFC-114)--in shipboard vapor compression refrigeration systems. A computer model was developed for comparing the two refrigerants in a simulated 440-kW centrifugal chillersystem. Equations for modeling each system component were developed and solved using the Newton-Raphson method for multiple equations and unknowns. Correlations were developed for CFC-114 and HFC-236ea boiling and condensing coefficients taken at the Iowa State Heat Transfer Test Facility. The experimental data provided by the NSWC sufficiently validate the model, and the simulation model predicts that HFC-236ea would perform favorably as a drop-in substitute for CFC-114. Several recommendations are discussed which may further improve the performance of HFC-236ea in Navy chillers.