||Comparison of CFC-114 and HFC-236ea Performance in Shipboard Vapor Compression Systems.
Ray, D. T. ;
Pate, M. B. ;
Shapiro, H. N. ;
||Iowa State Coll., Ames.;Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div.
Centrifugal compressors ;
Comparative evaluations ;
Environmental chemical substitutes ;
Performance evaluation ;
Material substitution ;
Vapor compression refrigeration cycle ;
Heat transfer ;
Computer models ;
Computerized simulation ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||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.
||Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div.
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|NTIS Title Notes
||Final rept. Oct 92-May 95.
||71M; 68A; 47A
||PC A06/MF A01