Originally Posted by strat_thru_marshall
Was wondering if it would be possible to pump the cold glycol from the freezer through my immersion chiller to get my wort to pitching temp while still in the brew kettle.
It's possible and some folks on this forum have calculated how many gallons of 32F glycol would be necessary to chill 5 gallons of 210F wort to 70F. I believe the conclusion was you'd need 10+ gallons of 32F glycol and you couldn't recirculate it (i.e., you'll need a separate reservoir to hold the warmed glycol).
Or, you could use ~40lbs of ice to achieve the same effect.