A method for the safe operation of turbocompressors with a surge limit control and a surge limit control valve

摘要

It is a method for secure operation of turbocompressors with a surge limit control and a surge limit control valve, wherein the compressor gases having a different composition and conveys the composition of the gas (molecular weight) the characteristic map of the turbocompressor and thus the position of the surge limit in the characteristic field influenced. In this case, the various compositions of the gases with the influence on the position of the surge limit and thus on the position of the surge limit line, as a rule, is compensated for, that within the surge limit control for the detection of pumping height δ h and the volume flow v predetermined design values for gas constant r, isentropic index k and compressibility number z are used and in the form of a predetermined pumping limit line (fig. 2, Fig. 4) within the surge limit control, with the reference value and the actual value for the surge limit control of the image are determined, and the compressor with the determined, - and actual values for the surge limit regulation with a minimum required distance from the surge limit is operated.