F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
341/38
F04D 27/02 (2006.01) G01K 3/10 (2006.01) G05D 23/22 (2006.01)
Patent
CA 1227853
ABSTRACT A surge detection system for a compressor having a gas inlet and a gas outlet and experiencing rapid temperature changes in said gas inlet during surges, said detector comprising first and second thermocouples having different temperature response times, Tf and Ts respectively, and producing an electrical output propor- tional to said rapid temperature change occurring during a surge, means for mounting said first and second thermo- couples in said compressor gas inlet such that both thermocouples are subject to the same temperature changes, means for electrically coupling said thermo- couples to algebraically sum said electrical outputs, Tf-Ts to represent the rapid change in temperature occurring between said thermocouples, and means coupled to said thermocouples for converting said algebraically summed outputs, Tf-Ts, to control signals representing the number, intensity and duration of said surges.
475488
Dresser-Rand Company
Macrae & Co.
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