Refrigerant forced-convection condensation inside horizontal tubes
Author(s)Bae, Soonhoon; Maulbetsch, John S.; Rohsenow, Warren M.
Massachusetts Institute of Technology. Division of Sponsored Research.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
Massachusetts Institute of Technology. Heat Transfer Laboratory.
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Condensing heat transfer rates inside a horizontal tube were investigated -for large quality changes across the tube. The proposed correlation is a modification of the work of Rohsenow, Webber and Ling . The result of the investigation is modified through new variables which include the effect of the true axial pressure gradient in a tube. Experimental data are presented for a range of flow conditions. A 0.493 in. ID, 19.75 ft. long nickel tube was used for condensing Refrigerant-12. The saturation temperature was varied from 84.6*F to 118*F and flow rates of vapor-liquid mixture ranged from 151,000 lbm/ft 2hr to 555,000 lbm/ft 2hr. The inlet quality was essentially 100% at saturation and exit qualities ranged from 50% to zero and subcooled liquid. The test results for average heat transfer coefficient ware correlated by the analysis within 15%.
Cambridge, Mass. : M.I.T. Heat Transfer Laboratory, 
Technical report (Massachusetts Institute of Technology, Heat Transfer Laboratory) ; no. 59.
Tubes -- Fluid dynamics., Heat -- Transmission., Refrigerants.