How can I maximise the cooling from a counterflow chiller

[Frisp]

Folks
How do I maximise the cooling with my Kegland CFC ? I did a batch on Sunday and at full flow on cooland and wort I got down to 27C from boiling. I see folks going straight to fermenter from the CFC but 27C strikes me as a bit warm.

do I choke the flow of wort in/out?
do I choke the flow of cold water in/out?
Do I just let it rip full blast on water and wort and take the 27C ?

 

[Stu's Brews]

I find with my Grainfather CFC it is best to only have the valve open about 2/3rds.

That gives the wort sufficient contact time with the cooling water to get it close to pitching temperature.

If needed I then let my glycol chiller bring the wort down the last degree or two before pitching the yeast.

 

[conorm]

Full flow rate through the cooling water feed, and throttle the wort flow. An IR thermometer is really handy to get a live view of the wort temp coming out of the chiller. Another thing you can do is stop the flow entirely for a minute or so and that will cool the wort right down to the water temp if you know you are overshooting and need to cool what you've already passed theough.

 

[Buffers brewery]

Don’t have a Grainfather CFC but a DIY version. I recirculate the cooled wort back to the boiler and leave it alone until the wort is cooled. I then let it stand to settle before transferring to fermenter.

 

[Stu's Brews]

Don’t have a Grainfather CFC but a DIY version. I recirculate the cooled wort back to the boiler and leave it alone until the wort is cooled. I then let it stand to settle before transferring to fermenter.

View attachment 108637

Yes, I should have added that I do similar to this too.

I recirculate back into the Grainfather until the temperature drops to 50degC and then start transferring to the fermenter.

I find this helps filter out a lot of the cold break and the rest I remove the next day through the dump valve (benefit of a conial fermenter).