[Power Plant] Closed Cooling Water Tank _ Bladder
Hi guys, I need your advice.
Currently I am working as Power Plant Engineer and I have a question about CCW system. Normally, in South Korea and world wide, open type ccw expansion tank is applied which located in the high elevation(about 10 - 15 meter) to provide the enought suction pressure to Pump.
But I am thinking of using the bladder type CCW tank instead of open CCW tank. This bladder tank is subjected to be pressurezied in 2-3 bar with N2 bombe. But I am not sure this pressuired bladder pump can pressurize the CCW system (CCWP suction pressure) the same as CCW open tank. Because I heard the the main role of CCW baldder tank is to absorbe the fluctuation of the CCW system pressure not elevate the system pressure.
Could you please let me know if pressured CCW tank (at ground) can give enough suction pressure (NPSH a) to our CCW pump.
Many Thansk.