Accession Number : ADA321753

Title :   Semi-Analytical Determination of Heat Transfer Coefficients in Nucleate Pool Boiling of Pure Liquids.

Descriptive Note : Technical rept.,

Corporate Author : GRAMBLING STATE UNIV LA DEPT OF MATHEMATICS AND COMPUTER SCIENCE

Personal Author(s) : Lee, Angela ; Harrison, Tameka ; Sharma, Parashu

PDF Url : ADA321753

Report Date : 02 FEB 1996

Pagination or Media Count : 27

Abstract : In this work we have modified a semi-empirical correlation for evaluating heat transfer coefficients for a variety of liquids possessing different physico-thermal properties. The liquids under investigation were hydrocarbons and distilled water. Data were chosen for a wide range of heating surfaces, heat flux, and pressures. The correlation for heat transfer coefficient is based on two main factors contributing for heat removal from the surface. The first factor includes removal of heat by transient heat conduction to, and subsequent replacement of, superheated layer around boiling sites. The second factor takes into account the latent heat transport during growth of vapor bubbles. The equations for bubble emission frequency, f were developed analytically. Laplace Equation was used for the bubble departure diameters. The correlation predicts boiling heat transfer data well for hydrocarbons and distilled water.

Descriptors :   *LIQUIDS, *HEAT TRANSFER COEFFICIENTS, *NUCLEATE BOILING, FREQUENCY, TRANSIENTS, EMISSION, REMOVAL, LAYERS, VAPORS, GROWTH(GENERAL), SITES, SURFACES, PURITY, CORRELATION, LATENT HEAT, HYDROCARBONS, SUPERHEATING, BUBBLES, THERMAL CONDUCTIVITY, HEAT FLUX, DISTILLED WATER, LAPLACE TRANSFORMATION.

Subject Categories : Physical Chemistry
      Industrial Chemistry and Chemical Processing
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE