HEAT-TRANSFER DURING FORCED-CONVECTION CONDENSATION INSIDE HORIZONTALTUBE

This paper presents the results of an experimental investigation on he at transfer behaviour during forced convection condensation inside a h orizontal tube for wavy, semi-annular and annular flows. A qualitative study was made of the effect of various parameters - refrigerant mass flux, vapour quality, condensate film temperature drop and average va pour mass velocity - on average condensing heat transfer coefficient. Akers-Rosson correlations have been found to predict the heat transfer coefficients within +/- 25% for the entire range of data. A closer ex amination of the data revealed that the nature of the relation for the heat transfer coefficient changes from annular and semi-annular flow to wavy flow. Akers-Rosson correlations with changed constant and powe r have been recommended for the two flow regimes.