A system for controlling a centrifugal gas compressor (108) in an HVAC, refrigeration or liquid chiller system (100) in which flow of gas through the compressor is automatically controlled to maintain desired parameters within predetermined ranges so as to prevent stall and surge conditions within the system. A variable geometry diffuser (119) in the compressor controls the refrigerant gas flow at the discharge of the compressor impeller wheel (201). This arrangement reduces mass flow, decrease/eliminate flow-reducing stall, and increases the operating efficiency of the compressor at partial load conditions. The variable geometry diffuser control in combination with a variable speed drive (VSD) (120) increases the efficiency of the compressor at partial system loads, and eliminates the need for pre-rotation vanes at the inlet of the centrifugal compressor.
申请公布号
WO2009058975(A1)
申请公布日期
2009.05.07
申请号
WO2008US81747
申请日期
2008.10.30
申请人
JOHNSON CONTROLS TECHNOLOGY COMPANY;SOMMER, STEVEN TRENT;TREVINO, JR., JOHN;IANCU, FLORIN;CHERVIL, RUDY;SMYDER, ERIC JOHN
发明人
SOMMER, STEVEN TRENT;TREVINO, JR., JOHN;IANCU, FLORIN;CHERVIL, RUDY;SMYDER, ERIC JOHN