Air Cooling And Evaporative Cooling Under The Conditions Of The Motor Stator Temperature Field Research

The temperature fields of the stator in a turbine generator model, which is cooledunder two different kinds of cooling conditions--forced air cooling and evaporativecooling, were analyzed in this thesis.Before simulation and calculation, numerical analyzing method is presented and the 3D steady-state heat transfer model is set up. Boundary conditions are analyzed and nominated. The temperature distributions of three kinds of stators, which are with different turn insulation thickness, are calculated. In air-cooling condition, many calculated results show the relationship between current density and temperature rise. In evaporative cooling condition, the effect for the height of the cooling medium F-113 is calculated.To verify the simulation results, the experiment studies were performed. The stator was inserted in a stainless steel cylinder. In air-cooling condition, the temperature of the stator are measured, the effect of wind velocity, turn insulation thickness, current density of the stator are analyzed. In evaporative cooling condition, the temperature distributions of the stator in high current density are measured. It is obviously that the temperature rise is lower in evaporative cooling condition than in forced air-cooling condition.Through above study, the calculated and experimental data show the efficiency of forced air-cooling technology and evaporative cooling technology. Above results can be used as reference for the selection of cooling technologies in practical engineering applications.