| 摘要 |
The present invention relates to a method and an apparatus for control of a compressor, where the compressor inlet gas may contain water and/or non-aqueous liquid. The method comprises the steps of measuring temperature at the compressor (1) inlet and/or outlet side, measuring pressure at the compressor (1) inlet and outlet side in order to determine a compressor pressure ratio, measuring fluid mixture density at the compressor (1) inlet and/or outlet side, measuring individual volume fractions of gas, water and non- aqueous liquid at the compressor inlet and/or outlet side, measuring fluid velocity at the compressor inlet and/or outlet side, determining individual flow rates of gas, water and non-aqueous liquid on the basis of the measured individual volume fractions of gas, water and non-aqueous liquid and the fluid velocity at the compressor inlet and/or outlet side, based on the determined individual flow rates of gas, water and non-aqueous liquid, determining an actual fluid mixture total volumetric flow rate of gas and liquid at the compressor inlet and/or outlet side, and on the basis of the determined compressor pressure ratio and the determined actual fluid mixture total volumetric flow and/or the measured temperature and/or the measured fluid mixture density at the compressor (1) inlet and/or outlet side according to steps a-g, controlling (7, 8) a recirculation valve position of at least one recirculation valve (5, 6) arranged between the inlet and outlet side of said compressor (1) in order to ensure that the compressor does not enter into a surge regime. |
