Boil off volume ??? - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Boil off volume ???

Reply
 
Thread Tools
Old 03-07-2010, 03:52 PM   #1
OHIOSTEVE
Recipes 
 
Sep 2009
SIDNEY, ohio
Posts: 3,526
Liked 72 Times on 64 Posts



Is there anything I can do to get my boil off volume more consistent? I generally boil off about 1 gallon per hour, BUT sometimes a lot more and sometimes a bit less...It is aggrivating . I brew on the stove top and use the exact same burner and exact same pot every time but have different boil off rates every time.
__________________
Quote:
Originally Posted by Mikethepoolguy View Post
I started brewing 69 days ago, 35 gal so far. SWMBO hasnt complained yet! Better than the hookers, gambling, and crack I used to do, I guess.
BALDGUT BREWS

 
Reply With Quote
Old 03-07-2010, 04:43 PM   #2
Kass_Brauhaus
 
Kass_Brauhaus's Avatar
Recipes 
 
Jan 2009
Arvada, Colorado
Posts: 204
Liked 3 Times on 3 Posts


How different are the beers you're brewing, in terms of gravity and such? Just thinking out loud (or in type), and maybe it's the dissolved stuff affecting things?
__________________
-------------------------
Andy Kass
Braukursteilnehmer des Kass Brauhauses
http://www.google.com/calendar/embed...America/Denver

 
Reply With Quote
Old 03-07-2010, 04:52 PM   #3
OHIOSTEVE
Recipes 
 
Sep 2009
SIDNEY, ohio
Posts: 3,526
Liked 72 Times on 64 Posts


very varied...from 1.030 to 1.088 or better...hmmm maybe there is something to that?
__________________
Quote:
Originally Posted by Mikethepoolguy View Post
I started brewing 69 days ago, 35 gal so far. SWMBO hasnt complained yet! Better than the hookers, gambling, and crack I used to do, I guess.
BALDGUT BREWS

 
Reply With Quote
Old 03-07-2010, 04:57 PM   #4
Kass_Brauhaus
 
Kass_Brauhaus's Avatar
Recipes 
 
Jan 2009
Arvada, Colorado
Posts: 204
Liked 3 Times on 3 Posts


That's the only thing I can think of, unless relative humidity will effect it. But it's been a decade since I took chemistry, so...
__________________
-------------------------
Andy Kass
Braukursteilnehmer des Kass Brauhauses
http://www.google.com/calendar/embed...America/Denver

 
Reply With Quote
Old 03-07-2010, 05:21 PM   #5
Codemunki
Recipes 
 
Mar 2010
Ashburn, Virginia
Posts: 35
Liked 1 Times on 1 Posts


Different gravity worts will boil at different temperatures. The temperature will affect the boil off volume. It is the same concept as salting roads. That just reduces the freezing temp of water. Anything dissolved in water will affect it's boing and freezing temps.

 
Reply With Quote
Old 03-07-2010, 10:37 PM   #6
artguy
HBT_SUPPORTER.png
Recipes 
 
Jul 2009
Massachusetts
Posts: 192
Liked 2 Times on 2 Posts


Quote:
Originally Posted by Codemunki View Post
Different gravity worts will boil at different temperatures.
Is it higher or lower gravity that boils off more? It never occurred to me there would be an impact from the pre-boil gravity (and I guess my brews haven't been in wildly different ranges either).

 
Reply With Quote
Old 03-07-2010, 11:27 PM   #7
Codemunki
Recipes 
 
Mar 2010
Ashburn, Virginia
Posts: 35
Liked 1 Times on 1 Posts


A higher gravity wort should boil off more water per hour. Pretty much anything dissolved in water will raise it's boiling temp and lower it's freezing temp.

I can't really say how much. I'm sure there are some chemists out there who can, though.

 
Reply With Quote
Old 03-08-2010, 12:03 AM   #8
uechikid
HBT_SUPPORTER.png
 
uechikid's Avatar
Recipes 
 
Aug 2009
Antioch Ca.
Posts: 627
Liked 1 Times on 1 Posts


I have similar problem. I brew 10 gallon batches and boil off 2+ gallon per hour. My boil is a nice esay rolling boil. I don't worry to much about it. I have just adjusted my sparg water.
__________________
"Carpe Diem"

 
Reply With Quote
Old 03-08-2010, 01:39 AM   #9
wyzazz
Recipes 
 
Aug 2009
Atwater, OH
Posts: 4,312
Liked 55 Times on 52 Posts


Also take in to account that for extract/PM brews you're adding a lot of solids (LME/DME) to your boil, so that will affect volume as well.
__________________
Quote:
Originally Posted by Revvy View Post
And I'd like to see my 1.080 beers ready from grain to glass in a week, and served to me by red-headed twin penthouse pets wearing garter belts and fishnet stockings, with Irish accents, calling me "master luv gun," but we can't always get what we want can we? :)

 
Reply With Quote
Old 03-08-2010, 01:49 AM   #10
Mikethepoolguy
 
Mikethepoolguy's Avatar
Recipes 
 
Jan 2010
Pineville, North Carolina, USA
Posts: 324
Liked 22 Times on 19 Posts


Humidity, ambient air temp, amount of disolved solids. You can control the temp, maybe the humidity, but you would have to brew the same beer every time.

 
Reply With Quote


Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Calculating pre-boil volume for full boil? rudy0498 Extract Brewing 8 10-21-2009 05:49 PM
Help! Include LME volume in boil volume? bitteral Beginners Beer Brewing Forum 7 05-31-2009 06:30 PM
Boil-off volume cimirie All Grain & Partial Mash Brewing 3 04-13-2009 03:16 AM
Pre-Boil Volume thedude123 General Techniques 8 08-06-2008 01:27 PM
First AG- mash & Boil volume vs hop boil quickerNu All Grain & Partial Mash Brewing 12 06-20-2008 02:36 PM


Forum Jump