Ultrasensitive apparatus and method for detecting change in flui

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

1980-09-05

1984-02-28

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

73195, 73204, G08B 2100, G01F 168

Patent

active

044344180

ABSTRACT:
Transient change in heat flux due to ultrasmall variation in flow conditions (say from no flow-to-flow) 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.

REFERENCES:
patent: 2729976 (1956-01-01), Laub
patent: 2808580 (1957-10-01), Fuller
patent: 3431149 (1969-03-01), Webb
patent: 3821895 (1974-07-01), Sumikawa et al.
patent: 4102196 (1978-07-01), Holtermann
patent: 4198859 (1980-04-01), Holtermann

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