TURBO REFRIGERATING MACHINE SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a turbo refrigerating machine system which is a turbo refrigerating system including a refrigerating machine group having a plurality of turbo compressors for achieving synthetic energy saving by controlling the number of operation of the turbo compressors in the refrigerating machine group with a simple device.

SOLUTION: This turbo refrigerating machine system includes: a plurality of turbo compressors for sucking and compressing refrigerant gas; a plurality of variable speed driving machines for driving each of the plurality of turbo compressors; and a control means 70 for controlling the output of a refrigerating machine 101 equipped with the turbo compressors by adjusting the rotational speeds of the variable speed driving machines in accordance with a refrigeration load. The control means 70 includes a number control part 76 for increasing the number of operation of the turbo compressors on the basis of the rotational speed difference threshold of a difference or rate between the rotational speed and a reference rotational speed.

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