HIGH CAPACITY CHILLER SYSTEM OPERATING METHOD AND COMPRESSOR ASSEMBLY

摘要

PROBLEM TO BE SOLVED: To provide a method for operating a high capacity chiller system that exerts a performance in a wide operation range, and a compressor assembly.SOLUTION: A high efficiency, low maintenance single stage or multi-stage centrifugal compressor assembly 36 for large cooling installations is provided. A cooling system provides direct, two-phase cooling of a rotor by combining gas refrigerant from an evaporator section 34 with liquid refrigerant from a condenser section 30 to affect a liquid/vapor refrigerant mixture. Cooling of the stator with liquid refrigerant may be provided by a similar technique. A noise suppression system is provided by injecting liquid refrigerant spray at points between an impeller and the condenser section. The liquid refrigerant may be sourced from high pressure liquid refrigerant from the condenser section.