Home Brew Forums > Home Brewing Beer > Brewing Software > BTP Boil Volume
Reply
 
Thread Tools
Old 04-03-2010, 01:12 PM   #1
RedGlass
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: Boston, MA
Posts: 214
Liked 2 Times on 2 Posts

Default BTP Boil Volume

I'm pretty sure this is a really stupid question, but I need to ask it anyway.

When I'm setting up a recipe in BTP, I see a bigger volume going into the kettle than the numbers account for. For example, a "Brewing Classic Styles" recipe has a 7 gallon boil and a 6 gallon final volume...yet when I set my numbers for a 6 gallon final, with 1 gallon evap. per hour and 1 hour boil...it tells me 7.25 should be going into the boil.

I can only think of 3 possible explanations:

1) There is some setting for trub loss or something that I cannot find and I need some guidance.
2) The software is calculating the .25 gal difference because the final volume is at 68*F and the kettle volume is at 212*F (That would really amaze me if there is a .25 gal difference between the temps).
3) I have absolutely lost my mind.


RedGlass is offline
 
Reply With Quote
Old 04-04-2010, 03:20 PM   #2
RedGlass
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: Boston, MA
Posts: 214
Liked 2 Times on 2 Posts

Default

Anyone?

Maybe I can simplify since I wasn't very clear in the OP. I set a 6 gal final volume. I set 1 gal evaporation per hour. I set a 1 hour boil. To me, that should make a pre-boil volume of 7 gallons. Beer Tools Pro tells me my volume should be 7.25 gallons. Why?


RedGlass is offline
 
Reply With Quote
Old 04-04-2010, 03:23 PM   #3
willynilly
Registered User
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Avon
Posts: 728
Liked 5 Times on 5 Posts

Default

I dont use BTP, but every software has a # for trub loss, it also has a # for loss of volume due to wort shrinkage (after cooling it is about 4% of the volume)

It is compensating for trub and or shrinkage is my only thought, you can adjust those #s somewhere.
willynilly is offline
 
Reply With Quote
Old 04-04-2010, 04:54 PM   #4
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 3 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,626
Liked 1236 Times on 815 Posts
Likes Given: 33

Default

It's the volume shrinkage. The kettle vol is at 212 and the final is at 68F.
__________________
Welcome to BrewHardware.com. I love you.
New 100% Stainless Steel Heating Elements are IN! ULWD 5500w Ripple, 2000w, 1500w, etc
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.
Bobby_M is offline
 
Reply With Quote
Old 04-04-2010, 07:10 PM   #5
samc
Feedback Score: 1 reviews
Recipes 
 
Join Date: Aug 2008
Location: Portland OR
Posts: 5,423
Liked 60 Times on 56 Posts
Likes Given: 29

Default

Why 212 however? It seems like a volume based upon the temp you fill the kettle makes more sense - 170F or so.
samc is offline
 
Reply With Quote
Old 04-04-2010, 07:14 PM   #6
willynilly
Registered User
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Avon
Posts: 728
Liked 5 Times on 5 Posts

Default

Good question
willynilly is offline
 
Reply With Quote
Old 04-04-2010, 07:19 PM   #7
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 3 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,626
Liked 1236 Times on 815 Posts
Likes Given: 33

Default

In the schedule section, all volume measurements are temperature dependent so it might specify 7.1 gallons of runnings but it will then show something like 7.25 gallons at boil. I think they just had to pick a single temp for the field and went with 212.
__________________
Welcome to BrewHardware.com. I love you.
New 100% Stainless Steel Heating Elements are IN! ULWD 5500w Ripple, 2000w, 1500w, etc
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.
Bobby_M is offline
 
Reply With Quote
Old 04-04-2010, 07:31 PM   #8
RedGlass
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: Boston, MA
Posts: 214
Liked 2 Times on 2 Posts

Default

Thanks all.

Quote:
Originally Posted by samc View Post
Why 212 however? It seems like a volume based upon the temp you fill the kettle makes more sense - 170F or so.
I had the exact same thought, which is what made me ask. I'm still amazed that liquid water expands so much when heated...
RedGlass is offline
 
Reply With Quote
Old 04-05-2010, 01:00 AM   #9
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 3 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,626
Liked 1236 Times on 815 Posts
Likes Given: 33

Default

Think about it this way, if they chose 165F, which would be about right for an all grain brewer, it would exclude extract brewers. 212 is a common temp in the boil kettle for all brewers.


__________________
Welcome to BrewHardware.com. I love you.
New 100% Stainless Steel Heating Elements are IN! ULWD 5500w Ripple, 2000w, 1500w, etc
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.
Bobby_M is offline
 
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 Volume daveofmacomb Beginners Beer Brewing Forum 3 04-30-2009 02:25 AM
Boil-off volume cimirie All Grain & Partial Mash Brewing 3 04-13-2009 03:16 AM
First AG- mash & Boil volume vs hop boil quickerNu All Grain & Partial Mash Brewing 12 06-20-2008 02:36 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS