« on: September 09, 2013, 06:19:39 PM »
Just one more, why not be DD for a brewery tour at your local brewery hotspot. Better yet, get your spouse to do it so you can imbibe as we'll!
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As regards a different lesson learned, I found that tipping it upside down to drain it after the boil is done and hoses are disconnected, it doesn't always drain well, and if left outside in the unheated garage it can freeze and burst the coil. So now I keep it stored in my heated basement.As to the draining - I rotate my IC after use so that all the coils drain.
I see where you're coming from, but you're making it more complicated than it is. Essentially, for a 10# batch you lose 1.2 gallons to the grain bed, or 16% to hit 6.5 gallon pre-boil. For a 20# batch, you lose 2.4 gallons, or 27%, to the grainbed. So, the amount lost increases faster than the total volume increases, but the amount lost is proportional the the grist weight.
This is because the amount of wort lost to the grain bed is directly proportional to the amount of grain.
this implies the percentage and hence efficiency should be the same. to lower the efficiency it would be wort lost is proportional to the amount of grain raised to some power. which may be the case. (in other words amount of lost wort increases faster than the amount of grain increases.)
There is a lot more to it than temp. Their yeast may be good at those temps, but it could be other factors too. For homebrewers, keeping it cool is a lot more important due to the size and shape of our fermenters. The pressure in larger fermenters suppresses the formation of esters and higher alcohols, so unless you are fermenting under pressure, keep it cool.