Research On Evaporation Length Of A Water Spray Evaporative Cooler

Atmospheric temperature has an important effect on thermal performance for gas turbine. Inlet air cooling is an important technologe to reduce the temperature of inlet air , increase the power output and decrease fuel consumption. Water spray evaporative cooling is one of the most methods in gas turbine inlet air cooling. This technology is prior in the less investment,lower operation cost and more conveniency operation maintenance.According to the principle of water spray evaporative cooling, this paper does a theoretical calculation on temperature of the cooling inlet air, concludes some influencing factors on the effect of evaporative cooling and further calculates the optimum water-sprinkling. This paper adopt the coupling calculation of the two-phase flow-field: gas phase is simulated by Reynold's average N-S equation,standard k-εturbulence model; droplet phase is simulated by DPM model. Based on numerical simulation of the gas-liquid two-phase flow in water spray evaporative cooler which run at Lunnan Gas Turbine Power Station MARS-100 unit, the theoretical calculated resultes are testified. And numerical simulation of evaporation length of water droplet is obtained. The numerical simulation of this parts provide the theoretical basis for optimizing the structure and raising the efficiency of the water spray evaporative cooler.