CENTRIFUGAL COMPRESSOR WITH EXTENDED OPERATING RANGE

摘要

This disclosure relates to a centrifugal compressor. In a first example, the compressor includes a first impeller provided in a main refrigerant flow path, a second impeller provided in the main refrigerant flow path downstream of the first impeller, and a recirculation flow path. In the first example, the recirculation flow path is provided between a first location and a second location along the main refrigerant flow path. The first location is downstream of the second location, and the second location is downstream of the first impeller. In a second example, the compressor includes an impeller provided in a main refrigerant flow path, and a recirculation flow path provided between a first location and a second location along the main refrigerant flow path. In the second example, the recirculation flow path includes a recirculation volute. Further disclosed is a method for operating a centrifugal compressor.

主权项

1. A centrifugal compressor, comprising:
a first impeller provided in a main refrigerant flow path; a second impeller provided in the main refrigerant flow path downstream of the first impeller; and a recirculation flow path provided between a first location and a second location along the main refrigerant flow path, the first location being downstream of the second impeller, the second location being downstream of the first impeller.