Pumps – Condition responsive control of pump drive motor – In response to pump speed
Patent
1997-08-11
1999-07-20
Freay, Charles G.
Pumps
Condition responsive control of pump drive motor
In response to pump speed
62498, 62408, F04B 4900
Patent
active
059248475
ABSTRACT:
A vapor compression refrigeration system, such as a water chiller, uses a centrifugal compressor with magnetic bearings and a refrigerant, specifically HFC-227ea and HFC-227ca, to minimize enthalpy rise across the compressor and/or provide compression in a single stage for low cooling capacity. Magnetic bearings eliminate the problem caused by lubricated bearings to support rotating structure during normal compressor operation. The centrifugal compressor can be configured with a pre-defined static surge line.
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Benedict Scott M.
Gui Fulin
Scaringe Robert P.
Freay Charles G.
Mainstream Engineering Corp.
Moses Daniel E.
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