Power plants – Motive fluid energized by externally applied heat – Having apparatus cleaning – sealing – lubricating – purging,...
Patent
1985-05-09
1986-04-22
Husar, Stephen F.
Power plants
Motive fluid energized by externally applied heat
Having apparatus cleaning, sealing, lubricating, purging,...
60646, 60660, F01K 1900
Patent
active
045833699
ABSTRACT:
In a steam power plant, a system is provided for early detection of a rupture or extensive leak from the feedwater tubing in the feedwater heaters. The system senses the temperature and pressure in the steam space of each feedwater heater. A pressure rise followed by a temperature drop in the steam space of a feedwater heater is recognized as being caused by a rupture or extensive leak in the feedwater heater and in response to such occurrance, an alarm is activated and a power assisted check valve is closed in the extraction line feeding extraction steam from the turbine to the feedwater heater.
REFERENCES:
patent: 3135096 (1964-06-01), Schroedter
patent: 4003205 (1977-01-01), Matsumura
patent: 4020488 (1977-04-01), Martin et al.
Factory Mutual Research Corporation
Husar Stephen F.
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