The Effect of the non-condensable gases on the condensation of steam in the vertical pipes

In this research work, the condensation of a gase mixture.which is noncondensible in the steam.in a vertical tube was studied. For the entrance of the gase-steam mixture different types of profiles were examined. Steam-noncondensible gase in the steam-gase mixture, was condensed in the interior of the steam condensed pipe and thus separated from the noncondensable gase. As a noncondensable gase, air was used for the most practical purpose. By the accumulation of the noncondensable gase in the pipe the heat transfer coefficiency would fall down and this would reduce the effectivinees of the air-cooled condenser. And so.the diffusion of the steam toward the noncondensable gase film would decrease. In the calculation,integral metod was used. In the solution of the mass transfer problems an approach to a boundary layer was used and the equations were solved as the numerical values.The amount of the condensed water of the experiments and the amounts which were found theorically were very similar. In the experiments, the variation between the heat transfer coefficient and mole ratio of the gase phase was analysed. At the end.it was determined grafhically and by the calculations that by the increase of the heat transfer coefficient, the moleratio of the gase phase went down.