Record Display for the EPA National Library Catalog


Main Title Heat Transfer Evaluation of HFC-236ea with High Performance Enhanced Tubes in Condensation and Evaporation.
Author Tzuoo, S. M. ; Pate, M. B. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div. ;Iowa State Univ., Ames.;Strategic Environmental Research and Development Program, Arlington, VA.
Publisher Apr 98
Year Published 1998
Report Number EPA/600/R-98/033;
Stock Number PB98-137177
Additional Subjects Refrigerants ; Condensing ; Evaporation ; Chillers ; Heat transfer ; Thermodynamic properties ; Spraying ; Coolers ; Tubes ; Hydrofluorocarbons ; Environmental chemical substitutes ; Shipboard ; Performance evaluation ; HFC-236ea ; 1-1-1-2-3-3-hexafluoropropane ; Pool boiling
Library Call Number Additional Info Location Last
NTIS  PB98-137177 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 116p
The report gives results of an evaluation of the heat transfer performance of pure hydrofluorcarbon (HFC)-236ea for high performance enhanced tubes which had not been previously used in Navy shipboard chillers. Shell-side heat transfer coefficient data are presented for condensation in a Tubo-CII tube, pool boiling on Turbo-B and -BII tubes, and spray evaporation on Turbo-B and -CII tubes and a 1575-fpm (fin-per-meter) tube. These tubes have nominal outside diameters of 19.1 mm(3/4-in.), and they were evaluated at a saturation temperature of 2 C(35.6 F) in evaporation and 40 C (104 F) in condensation. The condensation and pool boiling results for the high performance enhanced tubes were compared with those for a plain tube and two integral finned (1024- and 1575-fpm) tubes, which were evaluated earlier. The comparison shows that the high performance enhanced tubes are able to promote heat transfer processes better than the plain tube, and especially better than the integral finned tubes that are currently being used with chlorofluorocarbon (CFC)-114 in the Navy shipboard chillers.