Охлаждение турбогенераторов большой мощности водородом

Abstract

The use of hydrogen for cooling of high power machines has been substantiated. The relation for heat transfer coefficient between hydrogen and inner walls of the cooling channels in the conductors of the rotor winding that represents boundary conditions of the third kind is proposed. The methods used for the determining of the temperature of the rotor windings of a turbogenerator have been described. The results of the thermal tests of the generator 550 MW at idle and short-circuit that were carried out at the state enterprise Plant "Electrotyazhmash" are represented. The research of the thermal state of the rotor winding was carried out by finite element method. This method was realized in the computer Solid Works environment. The maximum temperature of the rotor winding at rated speed was 74,7 °C (347,7 K) according to test results. The comparison of the calculated data and test results shows that the difference is not more than 10%.