A Numerical Simulation Of The Heat Transfer In The Filler-free Cooling Tower With An Up-stream Mechanical Ventilation

Accompanying the increasing of China's population and the acceleration of urbanization, as well the development of industrial and agricultural production, the requirement of water increases unceasingly, and the contradiction between the water-shortage and the increasing of requirement becomes evident day by day. Although the industrial production demands only 35.9 percent of the total water consumption of China, the influence of that on the sustainable development of the national economy is tremendous. Therefore the industrial water-saving in our country is an important aspect that can not be ignored. By applying cooling tower to realize the recycling of cooling water is a cost-effective water-saving, i.e energy-saving, measures. It has enormous economic and social benefit, and is one of the important ways of industrial water-saving.In order to study the flow-field characteristics of the filler-free cooling tower with an up-stream mechanical ventilation a numerical model of the heat and mass transfer of the cooling liquid in the tower was set up on the base of the analysis of the working principle of the cooling tower, the exercise process and heat transfer process of droplets. By FIUENT software a numerical simulation on the heat and mass transfer process of the liquid was carried out. After studying the simulation a series of figures, which contain the distribution of velocity field, temperature field and pressure field of the liquid flow in the cooling tower and the distribution of the flow trace-lines of droplets, was found out. By calculation the influence of the spray nozzle pressure and air flow velocity at the inlet on the heat and mass transfer of the liquid in the cooling tower was analyzed.