The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Heat transfer coefficients of condensing vapors
Author:	Lipuma, Charles Rocco
View Online:	njit-etd1956-014 (vi, 61 pages ~ 2.3 MB pdf)
Department:	Department of Chemical Engineering
Degree:	Master of Science
Program:	Chemical Engineering
Document Type:	Thesis
Advisory Committee:	Keeffe, George C. (Committee chair) Mantell, C. L. (Committee member) Salamone, Jerome J. (Committee member)
Date:	1956-06
Keywords:	Heat -- Transmission
Availability:	Unrestricted
Abstract:	The film coefficients of heat transfer for vapors condensing on a single horizontal tube have been measured for methyl, i-propyl, and n-butyl alcohols. The equipment used was specifically designed for these studies, and represents an improvement over that used by other investigators. The data collected were analyzed usingmodified Wilson method which is based on a rigorous theoretical analysis. It has been found that the condensing film coefficients for methyl and i-propyl alcohols vary with the heat duty. This is to be expected from the analysis mentioned above. Me variation was found for n-butyl alcohol. The observed values of the heat transfer coefficients have been compared with the values calculated with the Nusselt and Bromley equations. The Bromley equation is a modification of the Nusselt equation and takes into account the effect of the heat capacity of condensate. Excellent agreement between the observed coefficients and those predicted by the Nusselt equation were obtained with methyl and i-propyl alcohols. Good agreement was found with n-butyl alcohol. In all cases the Bromley equation predicted higher values of the condensing file coefficient than did the Nusselt equation. Close agreement between the observed and theoretical coefficients is a result of the refined theoretical and experimental methods used.