Abstract:
A compressor arrangement with centrifugal compressors arranged in sequence and each centrifugal compressor includes a rotor and a drive shaft, such that air flows through an inlet and out an outlet to a subsequent one of the centrifugal compressors, wherein drive shafts at two or more of the centrifugal compressors are arranged at an angle of between 0 degrees and 90 degrees with respect to one another.