Heat and Mass Transfer Analysis in a Closed Cooling Tower

A mathematical model is developed and applied for the performance analysis of closed cooling towers to find the effects of spray water temperature, process water and air thorough the tower. The process of heat and mass transfer is analyzed and the effect of spray water to air mass flow ratio, which is an important parameter in tower performance, is investigated. Finally the optimum value of this parameter for a certain closed tower is calculated. The current method is simpler than CFD solutions with an acceptable accuracy.