Theoretical Study on Condensation in Horizontal Tubes with Noncondensable Gas

AbstractA theoretical model based on Liao’ modified diffusion layer theory is developed including suction effect. The results show that the wall temperatures decrease along the condenser tube especially at lower inlet mass fluxes. The heat fluxes decrease along the condenser tube due to the accumulating NC gas layer. The condensate film plays as the dominant role for heat transfer when the NC mass fraction is small whereas the heat transfer is determined by both the condensate and gas film at larger inlet NC gas fractions