Diversion Of Optimization Design And Numerical Simulation Of The Indirect Air Cooling Unit Cooling Tower

Indirect air cooling technology is widely used in the coal thermal power generating units which of water-poor regions.The cooling principle is the air as a coolant for cooling the circulating water.And the main factors to affect the cooling capacity are ambient temperature,speed and direction.Based on the large thermal power units SCAL air-cooling system,The paper established the model,meshed and divided computational domain via Gambit,and made numerical simulation with the different temperature and wind speed in summer via Fluent,and analyzed the result,we can concluded that with the temperature and the speed of wind rising,the ventilation rate and heat exchange of the air-cooling tower reduced continuously,and drew the most unfavorable temperature and speed for the unit.The secondly,according to the practical situation in spot,based on the working principle of the air multiplier,the paper made a proposal that installed nozzles group on the suitable location in the air cooling tower,for the purpose of reducing the temperature fluctuation of the circulating water induced by adverse temperature and wind speed when the ambient temperature and transverse wind speed were too high.Through the method,we could reduce the fluctuations of in bad condition,and made the back pressure stable,increased the safety of indirect cooling units.Finally,based on jet theory,the scheme was simulated numerically with the application of the nozzle group model via Fluent software in order to obtain the optimization data in the situation of adverse temperature and wind speed by analyzing the simulation results.And based on the results,the paper selected the optimization scheme that met the actual situation.