Mathematical Description of Water-Cooling Process in Jet-Film Contact Devices

Resumo

The results of numerical studies of water-cooling process in jet-film contact devices are presented. It is shown that air velocity affects heat exchange negligibly because the increase in heat and mass transfer coefficients is balanced by the decrease in contact time. The water temperature at the jet-film contact device outlet drops markedly with decrease of relative water flow rate. Increase in heat and mass transfer coefficients leads to rise of air temperature and fall of water temperature. Contact devices can be used in water coolers with needed intensification of film flow of the liquid through various design solutions in the form of perforated and rough surfaces.