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In a thermal power plant : Why the Deaerator is placed at
height and mostly at 15.5mtr?
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Answer Posted / nisarg
Deaerator at height not only provides Available suction head at boiler feed pump at higher side than required NPSH but also makes re-circulation valve discharge to remain in liquid state and not the gaseous state. because feed water temperature to the BFP (and also the temperature after the throttling in ARC valve) is lower than the saturation temperature of the return line of re-circulation to deaerator.
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