Heat exchange – With alarm – indicator – signal – register – recorder – test or...
Patent
1993-12-10
1995-07-04
Schwadron, Martin P.
Heat exchange
With alarm, indicator, signal, register, recorder, test or...
165 95, 7386179, 374142, F28G 1300
Patent
active
054291780
ABSTRACT:
An electro-mechanical, dual tube and plug device for on-line monitoring of performance losses due to reduced conductivity of a heat exchanger resulting from micro-bio fouling of the surfaces of said heat exchanger/condenser and for detecting change of heat transfer resistance of individual heat transfer tubes. The dual tube and plug assembly includes a first flow assembly tube and a second temperature assembly tube attached to the discharge end of a heat exchanger for providing accurate measurement of temperature and cooling water flow. The first flow assembly tube includes a tube having an inner chamber, including a flow sensor comprising a paddle wheel and a sensor and a temperature sensor for measuring discharge water temperature. The second temperature assembly tube plugs the inlet and the outlet of a heat transfer tube immediately adjacent to the flow assembly tube and includes a plurality of spring loaded temperature sensors in the plugged empty heat transfer tube. Flow and discharge temperature signals from a first dual tube device are combined with other flow and discharge temperature signals, from additional dual tube devices. These signals are sent to a micro-processor which, utilizing inlet water temperature data provided by an inlet temperature sensor, continuously calculates, records and displays the individual heat transfer tube heat transfer co-efficient.
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Feller Murray F.
Garey John F.
Schlottenmier David J.
Electric Power Research Institute Inc.
Kahrl Thomas A.
Leo L. R.
Schwadron Martin P.
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