Condensation Studies of Saturated Nitrogen Vapors
Heat-transfer data involving cryogenic fluids have been determined by numerous investigators. In the area of boiling heat transfer, the literature contains an extensive list of experiments wherein the data were obtained and then compared with existing correlations . Generally, the correlations provide only fair agreement with the experimental points and adjustments have been made In these correlations or new models have been devised. Unfortunately, in the area of condensing heat transfer to cryogenic fluids, there Is a dearth of experimental data. Haselden and Prosad , investigating the condensation of nitrogen and oxygen vapors, have shown agreement, within experimental error, between their data and that predicted by Nusselt’s theory. However, in another condensation of a pure fluid, Drayer et al.  found that the experimental condensing coefficients for hydrogen fell below those predicted by Nusselt and diverged with decreasing temperature difference across the condensate film. Since this Is contrary to expectations, this study was Initiated to design a new cryostat which would more fully meet the assumptions Nusselt used In deriving his now classical equation and to repeat the nitrogen-condensation studies of Haselden et al. and the hydrogen-condensation studies of Drayer et al. to determine whether better agreement between experimental and theoretical results could be obtained. This study presents the condensing coefficients for saturated nitrogen vapors that were obtained experimentally and compares them with the results of Haselden et al. and those predicted by the Nusselt correlation.
KeywordsCondensate Film Condense Heat Transfer Condenser Tube Saturate Nitrogen Fill Tube
Unable to display preview. Download preview PDF.
- 1.E. G. Brentari and R. V. Smith, in: International Advances in Cryogenic Engineering, Plenum Press, New York (1965), p. 325.Google Scholar
- 2.G. G. Haselden and S. Prosad, Trans. Inst. Chem. Eng. (London), 27: 195 (1949).Google Scholar
- 3.D. E. Drayer and K. D. Timmerhaus, in: Advances in Cryogenic Engineering, Vol.7, Plenum Press, New York (1962), p. 401.Google Scholar
- 5.H. Emmon, Tram. AIChE, 35: 109 (1939).Google Scholar
- 6.N. Nusselt, Z. deut. Ing., 60:541 (1916).Google Scholar
- 7.R. B. Scott, Cryogenic Engineering, D. Van Nostrand Co., Princeton, N.J. (1959), p. 191.Google Scholar
- 8.W. H. McAdams, Heat Transmission, 3rd ed., McGraw-Hill Book Co., New York (1954), p. 333.Google Scholar
- 9.D. E. Drayer, Ph.D. Dissertation, University of Colorado, Boulder, Colo. (1961).Google Scholar
- 10.D. B. Chelton and D. B. Mann, Cryogenic Data Book, UCRL-3421, (May 15, 1956), p. 50.Google Scholar