Author Topic: stupid boiloff question  (Read 522 times)

Offline homoeccentricus

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stupid boiloff question
« on: June 07, 2015, 02:32:01 PM »
This morning. I measured the boiloff in my 20L BIAB pot. It's around 20%.  However, last time I brewed, the boiloff was way lower. Question: is there a big difference between simple water boiloff and word boiloff, or did I simply not boil hard enough last time?
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Offline dkfick

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Re: stupid boiloff question
« Reply #1 on: June 07, 2015, 02:35:05 PM »
I wouldn't measure it so much as a % but as volume.  I find rather I boil 5 gallons of 15 gallons in a pot I get almost the same volume loss over a specific period of time.
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Offline homoeccentricus

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Re: stupid boiloff question
« Reply #2 on: June 07, 2015, 03:03:22 PM »
Yes, ok, volume. But the test boil was with the same amount of wort that I boiled last time. Water boiloff was about 3 liters per hour, which seems to be pretty consistent with a 30 cm diameter pot. But my wort boiloff was a lot less. No idea why.
Frank P.

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Offline duboman

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Re: stupid boiloff question
« Reply #3 on: June 07, 2015, 03:12:40 PM »
Were the environmental conditions the same, meaning temperature, humidity, etc. More humidity in the ambient air will reduce boil off as well as warmer temperatures.

Also, keeping your actual boil consistent which can be difficult sometimes depending on your burner.
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Offline homoeccentricus

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Re: stupid boiloff question
« Reply #4 on: June 07, 2015, 05:08:58 PM »
I boil the wort on my gas stove in the kitchen. Not a big burner. I think subliminally I boil less vigorously to keep the wort odor out of the couch :-(
Frank P.

Staggering on the shoulders of giant dwarfs.