Detection modulo of the surge generation in the centrifugal compressor

摘要

(57) Abstract Control law of the working fluid surge in the centrifugal compressor. With this law, as for detection of the surge, time rate of change of 1st and 2nd compressor operational parameter is calculated; It compares with the time rate of change of the 1st and 2nd compressor operational parameter which it calculated and the approved set value of 1st and 2nd compressor operational parameter; The both rate of change which it calculated is equal to the respective rate of change set value when or it is above that, giving change to the fluids current which pass by the suction valve portion, it is achieved by evading surge state. In one execution feature of this invention, calculating the change of drawer electric current of emission pressure and the motive for action machine, it decides the presence of surge state by comparison with standard set value. Regarding another execution feature of this invention, it decides existence of surge state, by emission pressure and emission temperature and standard set value calculating and compares and.