3 replies to this topic

[DAIALOS]

Hi Everyone

 

Currently I am working with the idea of installing Variable Frequency Drives to some motors used to move the Fans on some cooling towers we have in our plant.

Based on my perspective this is a very good opportunity for Electricity consumption reduction and probably to increment Cooling Tower efficiency and extend equipment life time.

 

My main doubt is about how the control loop would for this implementation. I know that the temperature of the water is dependent of the climate temperature & Wet Bulb temperature, I could think this variables need to be in consideration at the time of designing the required control loop for the proper operation of the cooling tower with VFDs.

 

What is the common control loop or system for his type of application, which variables will be the key factor in controlling the fan speed through the VFDs? It will be the wet bulb temperature? Supply water temperature?

 

Thanks!

[breizh]

Daialos ,

Consider this resource ,it may help you .

Breizh

[sukanta87]

HI Dialos,

 

According to my previous experiences the key parameter should be cooling water temperature. And most of the cases it was the return cooling water temperature. See the attached sample sketch.

Attached Files

•  VFD_CW.png   1.17MB   3 downloads

[DAIALOS]

Excellent

 

Thanks!