Numerical Simulation And Experiment For The Inner Evaporative Cooling System Of Generator Stators

The inner evaporative cooling system with pump in generator stators?windings is the new cooling function. Bring the thermal with temperature changing of liquid and the phase-changing is the character of that. The inner evaporative cooling system has more advantages comparing with the air-cooling function and the water-cooling function. For examples, its efficiency is higher, its maintenance is easier, and its insulation., reliability is better. But the calculation is difficult. So the most important thing is to rebuild the mathematic model and to improve the precision. It抯 the leading of the world.This paper briefly presents the theory of the inner evaporative cooling system with pump in generator and a suit of simulation software developed based on it using C computer language. In this software, the calculating model was rebuilt . The dealing with division in two-phase flow resistance and the segment not evaporative when calculating the evaporative is added in order to improve the precision. The calculating result and the experiment result was compared to supply the reliable curve. Making the more calculation and give the method to maintain the state in balance.The result of the experiment in 200MW generator stators?windings is s~ tisfactory.