Through practical measurement on a natural draft cooling tower in a 150 MW unit

the efficiency and coefficient of heat and mass transfer in the tower were obtained

and several problems during the tower operation and its performance optimization direction were found.On this basis

the temperature and pressure distribution in rain area and filling area of the cooling tower were numerically simulated.The results show that

with the filling material thickness of 3.0minside the cooling tower

42.1% temperature drop needs 55.8% pressure loss

and the optimum thickness of the padding is around 2.5m.The optimum operation strategy of this circulating cooling water pump is one pump with two towers

and the wet bulb efficiency of the cooling tower can reach 75.0%

the net power generation can increase by 3.007 MW compared with the unit using two pumps with one tower strategy.