TURBO REFRIGERATION DEVICE AND METHOD OF CONTROLLING THE SAME

摘要

A turbo refrigeration device having a two-stage turbo compressor with high efficiency. The turbo refrigeration device has a control section for controlling the opening degrees of a first inlet vane of a first impeller and that of a second inlet vane of a second impeller. The control section has a dependent mode for operating, in a dependent-mode priority region (A), the second inlet vane such that it is dependent on the first inlet vane and also has an independent mode for increasing, in a independent-mode priority region (B), the opening degree of the second inlet vane independent of the first inlet vane.