IMPROVING METHODS TO CALCULATE HEAT TRANSFER DURING THE CONDENSATION INSIDE TUBES

An analysis has been made of methods to calculate heat transfer during the condensation of a vapor inside smooth vertical and horizontal tubes. The presence of a disagreement of 30–100% between experimental data and calculations by different methods (theoretical, semiempirical, and empirical) has been noted; boundary values of parameters in the Anan′ev, Boiko, and Kruzhilin semiempirical dependences have been substantiated, at which there is a good agreement between the experiments on condensation of vapors of many substances and calculations from the formulas of these authors. A semiempirical dependence has been given to calculate condensation heat transfer in the case where Re > 800 and the parameter governing the vapor velocity is β > 10.
   
Author:  V. G. Rifert, V. V. Gorin, V. V. Sereda, and V. V. Treputnev
Keywords:  fi lm condensation, heat transfer, smooth tube, interphase friction.
Page:  797