Detecting leaks in a heat exchanger in operation

Details Detecting leaks in a heat exchanger in operation Detecting leaks in a heat exchanger in operation

1985-12-05

1987-08-25

Cline, William R.

Heat exchange

With alarm, indicator, signal, register, recorder, test or...

73 407, G01M 304

Patent

active

046886273

ABSTRACT:
The process is suitable for detecting leaks in a heat exchanger for heat exchange between two gaseous fluids, for instance for super heating steam. The heat exchanger has a lower pressure fluid circuit and a higher pressure fluid circuit. A predetermined amount of a tracer gas, typically helium, is injected into the higher pressure fluid at the inlet of the heat exchanger and the presence of tracer gas within the lower pressure fluid is determined at the outlet of the heat exchanger. If the lower pressure gas is steam to be super heated, a minor amount of super heated steam is sampled at the outlet of the exchanger and is condensed. Then the uncondensable products are examined for presence of tracer gas.

REFERENCES:
patent: 3425264 (1969-02-01), Frei
patent: 3522008 (1970-07-01), Defabaugh et al.
patent: 3975943 (1976-08-01), Brachet
patent: 4226113 (1980-10-01), Pelletier et al.
patent: 4232546 (1980-11-01), Dumont
patent: 4328700 (1982-05-01), Freis
patent: 4524607 (1985-06-01), Pelletier et al.
patent: 4557139 (1985-12-01), Cantwell et al.
Kutukcuoglu, A., "Heat Transfer to Superheated Steam Flowing in Tubes and Annular Channels", Marme-und Stoffubertragung, Bd3, vol. 3 (1970), pp. 174-184.

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