Ventilating Structure Optimization Of 60MW Air-cooling Turbine Generator Based On Temperature Rise And Ventilation Calculation

With the rapid development of national economy,the demand for electricity is increasing and consequently,the scale of power industry is expanding.As the direct provider of electricity,turbine generator plays an important role in the development of power industry.With its superiority of broad spectrum,compact structure and cost-effective,small scale air-cooling turbine generator is aggressively expanding into electricity markets both domestically and abroad.Based on the project of Huaneng Nanjing 60 MW air-cooling turbine generator that Shanghai Electrical Machinery Plant produced,the features of small scale air-cooling turbine generator ventilation structure and the methods of temperature and ventilation calculation were deeply analyzed in this paper.Both generator stator and rotor temperature rises were calculated in accordance with the equivalent thermal network method.The generator stator and rotor ventilation and cooling structures were optimized according to calculation results of the equivalent thermal network method.The rotor and the whole generator ventilation status was calculated with the finite volume method.Furthermore,the influence to the generator interior wind path pressure and velocity distribution was compared under the circumstances of with and without center wind-separating board.The type test method for small scale air-cooling turbine generator was expounded in detail.Results of both theoretical calculation and temperature rise test were also compared in the paper which shows the stator and rotor ventilation structure of Huaneng Nanjing 60 MW air-cooling turbine generator were further improved.The adoption of the equivalent thermal network method can lead to more precise calculating result of the theoretical temperature rise,while the finite volume method better design of the generator ventilation and cooling structure.