Ultrasensitive apparatus and method for detecting change in...

Details Ultrasensitive apparatus and method for detecting change in... Ultrasensitive apparatus and method for detecting change in...

G - Physics

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F

73/63

G01F 1/68 (2006.01) G01F 1/684 (2006.01) G01F 1/688 (2006.01) G01F 1/696 (2006.01) G01P 13/00 (2006.01)

Patent

CA 1173266

ABSTRACT OF THE DISCLOSURE ULTRASENSITIVE APPARATUS AND METHOD FOR DETECTING CHANGE IN FLUID FLOW CONDITIONS, PARTICULARLY IN RELIEF FLOWLINES ASSOCIATED WITH A CHEMICAL OR REFINERY COMPLEX Transient change in heat flux due to ultrasmall variation in flow conditions (say from no flow-to-flow), particu- larly within a series of relief flowlines forming a component part of a flaring system associated with a chemical or refinery complex, is surprisingly useful in pinpointing a source of plant upset. Result: corrective action can be undertaken. In one aspect, the change in flux is monitored within each major relief flowline using a heat flux transducer-meter in series with signal indicating means, such as a recorder and/or an audio-alarm system. Cascading the signal output, i.e., serially combining the outputs of N thermocouples of the transducer-meter, enhances sensitivity. In a preferred case, N is about 80 but can be as high as 320, if desired.

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