Forced cooling method of transformer

[djsourabh]

What is exactly the control system employed for forced cooling of transformer?
'If the load on transformer increases,then temperature rises & the mass flow rate of coolant has to be increased' is it true?
So is there any sensor/transducer for sensing (taking the feedback) of flow rate of coolant?
If yes is it expensive?

 

[Varadha]

I guess, we can have a thermally operated flow control valves. i.e, thermostats to sense the temperature change and a transducer generating thermo-emf which could operate the flow control valve.

 

[russ_watters]

My guess is the pump runs at constant speed, but the fan is controlled by a speed controller.

 

[dlgoff]

... but the fan is controlled by a speed controller.

Or by turning on more fans.

http://www.electrical4u.com/transformer-cooling-system-and-methods/