I'm now working with centrifugal compressor and trying to reduce start up time. During start up compressor is being purged with process gas by sequence control. Purging timer is set so that three volume changes in compressor and corresponding lines is being acheived. Can somebody help me with one question. Do anybody knows any procedure or practise where i can found how many volume changes should be applied during start up. Compressor is handling CH4 gas.
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