So, I got my shiny new 10 tip natural gas burner in the mail and my shiny new 60qt Stainless Concord pot and decided I needed to test the Evaporation rate with just a straight water boil test, no grains.
Here are my numbers for a 60 min boil on my 41.9cm x 41.9cm pot:
--5Gal of water, which measured 5.375" in my pot, slightly less than the 5.41" that Biabacus predicts; probably a neglible difference
--Volume at beginning of boil was still 5.375"
--Volume measured hot at Flame-out (VFO)was 3.75"
--Volume measured after cooling (VAW) was 3.5625"
So that is an evaporation loss over the 60 min of 1.8125" which according to my math is 1.67Gal of evaporation loss.
So 3 questions:
1. I want to ensure that I should be measuring the evap loss as (Beg Vol - VAW) rather than (Beg Vol - VFO)
2. Should I change the Evap Rate in Section X to 6.32L/hr (1.67Gal)?
3. Is the starting volume discrepancy I mention above worthy of adjusting? If so, what is the best place to adjust?
Thanks!!!
Post #2 made 11 years ago
Your evaporation is going to vary from brew to brew. Note the temperature, humidity and weather conditions (If you brewed outside, is it windy? etc ..) in the environment you tested in. If you brew in radically different conditions for multiple brews, you may need to override to suit potential trends in your climate.
Otherwise it looks like the BIABacus estimated your evap at 1.56G. Why you would want to override that I have no idea, it could possibly be 1.45G per hour next time in relatively similar conditions.
I had to adjust mine quite a bit for a few brews during dry winter months, but now I'm back to being on par with BIABacus estimates.
Otherwise it looks like the BIABacus estimated your evap at 1.56G. Why you would want to override that I have no idea, it could possibly be 1.45G per hour next time in relatively similar conditions.
I had to adjust mine quite a bit for a few brews during dry winter months, but now I'm back to being on par with BIABacus estimates.
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- SVA Brewer With Over 20 Brews From United States of America
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Post #3 made 11 years ago
Hi wstehling
Don't fall into the trap of analysing your numbers too much. You will be better off trusting the biabacus for at least 5 brews whilst keeping good records, and only then think about tweaking the defaults to dial in your equipment. As Rick said things will change from brew day to brew day and boil off is always going to be up or down on your estimates unless the conditions are perfect.
1. I want to ensure that I should be measuring the evap loss as (Beg Vol - VAW) rather than (Beg Vol - VFO) VFO is the reading you put in section L
2. Should I change the Evap Rate in Section X to 6.32L/hr (1.67Gal)? Leave until you have data on at least 5 brews
3. Is the starting volume discrepancy I mention above worthy of adjusting? If so, what is the best place to adjust? Not worth worrying about your looking at 0.035 of an inch not even a 1mm
for being so precise.
Yeasty
Don't fall into the trap of analysing your numbers too much. You will be better off trusting the biabacus for at least 5 brews whilst keeping good records, and only then think about tweaking the defaults to dial in your equipment. As Rick said things will change from brew day to brew day and boil off is always going to be up or down on your estimates unless the conditions are perfect.
1. I want to ensure that I should be measuring the evap loss as (Beg Vol - VAW) rather than (Beg Vol - VFO) VFO is the reading you put in section L
2. Should I change the Evap Rate in Section X to 6.32L/hr (1.67Gal)? Leave until you have data on at least 5 brews
3. Is the starting volume discrepancy I mention above worthy of adjusting? If so, what is the best place to adjust? Not worth worrying about your looking at 0.035 of an inch not even a 1mm
for being so precise. Yeasty
Last edited by Yeasty on 11 Apr 2014, 02:09, edited 11 times in total.
Why is everyone talking about "Cheese"
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- SVA Brewer With Over 50 Brews From Great Britain
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Post #4 made 11 years ago
Really appreciate the feedback.
I had forgotten to change the boil length to 60 min, i had it set to 90 min which was giving me an evaporation of ~2.5Gal, which I thought was a significant delta from what my test came out with of 1.67Gal.
After setting to 60 min, I now see the 1.56Gal, so that is plenty close enough and I see no reason to over-ride.
THANKS!!!!
I figured out the error of my ways.Otherwise it looks like the BIABacus estimated your evap at 1.56G. Why you would want to override that I have no idea, it could possibly be 1.45G per hour next time in relatively similar conditions.
I had forgotten to change the boil length to 60 min, i had it set to 90 min which was giving me an evaporation of ~2.5Gal, which I thought was a significant delta from what my test came out with of 1.67Gal.
After setting to 60 min, I now see the 1.56Gal, so that is plenty close enough and I see no reason to over-ride.
THANKS!!!!
Last edited by wstehling on 11 Apr 2014, 03:00, edited 11 times in total.
Post #5 made 11 years ago
Something is wrong here, 60 quarts vs. 15.26 gallons.wstehling wrote:..... and my shiny new 60qt Stainless Concord pot .....
Here are my numbers for a 60 min boil on my 41.9cm x 41.9cm pot:
Last edited by Mad_Scientist on 11 Apr 2014, 03:30, edited 11 times in total.
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- SVA Brewer With Over 100 Brews From United States of America
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Post #6 made 11 years ago
Lol, you noticed that too, those are the actual dimensions, measured 3x, 41.9cm x 41.9cm and the pot is stamped 60Qt and is also sold online as 60qt.Something is wrong here, 60 quarts vs. 15.26 gallons.
Didn't really think it was worth worrying about, especially since the diameter (most important dimension in my mind) is dead on exactly 41.9cm.
Last edited by wstehling on 11 Apr 2014, 05:01, edited 11 times in total.
