Invention Grant
- Patent Title: Compressor-expander set critical speed avoidance
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Application No.: US13743418Application Date: 2013-01-17
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Publication No.: US08540498B2Publication Date: 2013-09-24
- Inventor: Saul Mirsky , Wayne Jacobson , David J. Hoogerwerf
- Applicant: Compressor Controls Corporation
- Applicant Address: US IA Des Moines
- Assignee: Compressor Controls Corp.
- Current Assignee: Compressor Controls Corp.
- Current Assignee Address: US IA Des Moines
- Agency: Sturm & Fix LLP
- Main IPC: F04B49/03
- IPC: F04B49/03 ; F04D27/02 ; F03B15/22 ; F25B49/02
Abstract:
A control method and apparatus for critical rotational speed avoidance in a compressor-expander set in a gas refrigeration system. By varying an opening of an antisurge or recycle valve, a shaft power used by the compressor in the compressor-expander set may be varied, thereby varying the rotational speed of the compressor-expander set to move it away from its critical speed zone. Additionally, a feedforward signal may be provided by a compressor-expander set control system to cause an antisurge valve for a recycle compressor to open upon a trip or shutdown of one compressor-expander set.
Public/Granted literature
- US20130129528A1 Compressor-Expander Set Critical Speed Avoidance Public/Granted day:2013-05-23
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