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Cooling tower in winter - slow down fan speed

Cooling tower in winter - slow down fan speed


I need some help here with some calculations.
I have the following cooling tower:
Thermal power: 1997 kW
Water flowrate: 26,5 l/s
Water inlet temp. (process): 48,5 ºC
Water outlet temp. (process): 30,5 ºC
Dry bulb temp.: 37,0 ºC
Wet bulb temp.: 24,0 ºC
Air flowrate: 40,1 m3/s

So i can obtain from the psychrometric chart the outlet conditions of the air in this situation.

But, if i have the following conditions in the winter:
Dry bulb temp.: 8,0 ºC
Wet bulb temp.: 6,3 ºC
Is it possible to slow down the fan speed ??

RE: Cooling tower in winter - slow down fan speed

Tower fan speed control based on sump temperature as a first step of control as well as a tower bypass system should do the job for you in winter

RE: Cooling tower in winter - slow down fan speed

Ok thanks!
But i'm trying to preview how much can i save in this winter conditions.
So, for this i want to know the air flowrate in this situation. That's my problem....


RE: Cooling tower in winter - slow down fan speed

Youir energy savings will depend upon DB and coincident WB temperatures in winter

RE: Cooling tower in winter - slow down fan speed

SAK9 has the answer about a bypass system for winter operations. Such bypass system for example is used by ice skating rinks in my region.

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