초록 ▼

Balancing the load between compressors is not trivial. An approach is disclosed to balance loads for compression systems which have the characteristic that the surge parameters, S, change in the same direction with rotational speed during the balancing process. Load balancing control involves equali

Balancing the load between compressors is not trivial. An approach is disclosed to balance loads for compression systems which have the characteristic that the surge parameters, S, change in the same direction with rotational speed during the balancing process. Load balancing control involves equalizing the pressure ratio, rotational speed, or power (or functions of these) when the compressors are operating far from surge. Then, as surge is approached, all compressors are controlled, such that they arrive at their surge control lines simultaneously.

대표청구항 ▼

[ We claim:] [1.] A method for controlling a compression system comprising at least two compressors, at least one driver, and a plurality of devices for varying the performance of said compressors, the method comprising the steps of:(a) defining a surge parameter, S, representing a distance between

[ We claim:] [1.] A method for controlling a compression system comprising at least two compressors, at least one driver, and a plurality of devices for varying the performance of said compressors, the method comprising the steps of:(a) defining a surge parameter, S, representing a distance between an operating point and a surge line for each compressor;(b) specifying a value, S.sub.*, of said surge parameter for each compressor;(c) manipulating the performance of said compressors to maintain a predetermined relationship between all compressors and/or drivers when the operating points of all compressors are farther from surge than said specified value, S.sub.*, wherein said predetermined relationship is not a function of S; and(d) manipulating the performance of said compressors in such a fashion that all compressors reach their surge lines simultaneously.