Accession Number : ADA205072


Title :   Effect of Vapor Velocity during Condensation on Horizontal Finned Tubes


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Hopkins, III, Charles R.


Report Date : DEC 1988


Pagination or Media Count : 137


Abstract : Heat transfer measurements were made for condensation of R-113 and steam on a smooth tube and on three finned tubes with rectangular shape fins. These tubes had a fin height and width of 1.0 mm and spacings of 0.25, 1.5, and 4.0 mm (tubes A, B, and C respectively). Data were taken by increasing the vapor velocity from 0.4 to 1.9 m/s for R-113 and 4.8 to 31.3 m/s for steam. For both fluids, the improvement of the condensing heat-transfer coefficient with vapor velocity was smaller for the finned tubes than for the smooth tube. For R-113, the smooth tube experienced a 43 percent improvement with vapor velocity, whereas the finned tubes (tubes A, B and C respectively) experienced improvements of only 0, 5, and 10 percent. For finned tubes (tubes A, B and C respectively) experienced improvements of only 31, 11, and 9 percent. Condensation; Vapor velocity effects; Heat transfer coefficient; Finned tubes; Theses.


Descriptors :   *TUBES , *THESES , *FINS , *HEAT TRANSFER COEFFICIENTS , *STEAM , FLUIDS , HEIGHT , CONDENSATION , SHAPE , VAPORS , MEASUREMENT , HEAT TRANSFER , VELOCITY , RECTANGULAR BODIES


Subject Categories : THERMODYNAMICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE