Happy HolidaySs Giveaway - Winners Re-Re-Drawn - 24 hours to Claim!

Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Evaporation rate?
Reply
 
LinkBack Thread Tools
Old 03-23-2009, 02:25 AM   #1
hopmadness
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2008
Location: Rochester MN (from Detroit)
Posts: 69
Default Evaporation rate?

So my first all grain is done. Pictures below. What kind of evaporation rate do you guys usually have to deal with? I lost a lot more than I expected.

Also, my efficiency was way off...only like 55%. Pretty sad. I was a little on the hot side at mash in, my first temp. measurement was 159 F....so maybe that had something to do with it.

__________________
hopmadness is offline
 
Reply With Quote Quick reply to this message
Old 03-23-2009, 03:21 AM   #2
oguss0311
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2007
Location: Northern NJ, USA
Posts: 256
Liked 1 Times on 1 Posts

Default

I lost a lot more than I thought I would too- when I started using the keggle I made. I collect no less than 7 gal. now- given that I leave a good half in the keggle (Bazooka screens suck-IMO- and I don't want all that hop residue as well as other protein & left over Irish moss, etc) and that often leaves me with a light 5.5 gal in the carboy. I also cut out the Huge rolling boil I used to do).
Who crushed your grain? I've started to use Iodine to ensure that the mashing is getting along- but of course iodine will not tell you anything except that conversion is happening- not what percent is or is not fermentable, etc.

__________________
oguss0311 is offline
 
Reply With Quote Quick reply to this message
Old 03-23-2009, 03:26 AM   #3
HotbreakHotel
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2007
Location: Grand Rapids, MI
Posts: 352
Liked 3 Times on 3 Posts

Default

Congratulations on your first all-grain! Nice kettle!!

I get about 15%/hour with a pretty peppy boil. It depends a lot on your burner, your kettle, and how intense your boil is so you just need to experiment and see what you're getting and work with that. I boil outside, and I've found the ambient temp affects it too. I've done 25 all-grain batches, and I still don't hit my desired evaporation all the time.

55% is a start -- you're doing good! At least you have a potential cause (the 159 degrees). If you haven't read the sticky on efficiency I'd recommend it. I read it now and then.

Onward and upward!!

__________________

Reason: fat finger
HotbreakHotel is offline
 
Reply With Quote Quick reply to this message
Old 03-23-2009, 04:33 AM   #4
nutcase
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2008
Posts: 155
Liked 1 Times on 1 Posts

Default

Congrats. i just finished my first all grain today also. I got about 15% an hour in boil off. I only hit 65% effiiciency.

__________________
nutcase is offline
 
Reply With Quote Quick reply to this message
Old 03-23-2009, 05:48 AM   #5
GunnerMan
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2008
Posts: 439
Liked 1 Times on 1 Posts

Default

Yeah I think the only way to measure your evap is to do a few boils and measure where you are at. I measured for my pot every 2.1 inches or so was a gallon on my pot, So I boiled 6.4 gallons(according to BS) and I ended up with almost exactly 6 gallons in the fermenter including all trub and hops. I was supposed to loose 1.41 gallons.
I lost about .75 gallons to evap/cooling, I put all my trub and hops in the fermenter and my evap set at 11% so thats why im still well above my 5 gallon mark. So my evaporation rate was just about 9% per hour assuming my cooling loss was 4% but it is probably a less since I started relatively cold and I am 6000 feet above sea level, it is probably around 1%. It was about 65 f outside at the time, and at night so the humidity was probably a bit elevated because we had some bad weather around.

I didn't have a huge boil because I could not tend to it all the time so it was closer to a simmer most of the time. My OG was way way over the top anyways so the extra water didn't hurt a bit.

Somewhere my math is wrong because when I set beer smith to my actual finish volume= 6 gallons and my actual boil off it says my boil should be 6.9 gallons and my boil off would be .69 gallons or so. Now im pissed off...

__________________

Primary : Honeybuns Weizen, Ode to Arthur(with partial sour)
Secondary:
Bottled: Cream of Three Crops, Hazed and Infused Clone
Planned: A green chile beer, I live in New Mexico gotta have the green chile beer.

Quote:
Originally Posted by Duckfoot View Post
Two days into my last batch made and the scent of the farts of a thousand rhinos is permeating the basement...

Life is good...

GunnerMan is offline
 
Reply With Quote Quick reply to this message
Old 03-23-2009, 11:15 PM   #6
Hammy71
Senior Member
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
Hammy71's Avatar
Recipes 
 
Join Date: Sep 2008
Location: , Maryland, The Tax Me State
Posts: 5,665
Liked 426 Times on 326 Posts
Likes Given: 660

Default

I've done about 5 AG so far and I've determined that I lose about a gallon per 1/2 hour..... so for Ed Wort's Oktoberfest I had 8.5 gallons of wort to get 5.5 gallons in the carboy (90 min boil). Hit the OG and volume dead on.... You just have to account for your own specific brewery. I came up short a couple of times and took a while to balance it out..... Keep very specific notes and you'll eventually get it down pat....

__________________
Hammy71 is offline
 
Reply With Quote Quick reply to this message
Old 03-24-2009, 01:21 AM   #7
hopmadness
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2008
Location: Rochester MN (from Detroit)
Posts: 69
Default

Quote:
Originally Posted by Hammy71 View Post
I've done about 5 AG so far and I've determined that I lose about a gallon per 1/2 hour..... so for Ed Wort's Oktoberfest I had 8.5 gallons of wort to get 5.5 gallons in the carboy (90 min boil). Hit the OG and volume dead on.... You just have to account for your own specific brewery. I came up short a couple of times and took a while to balance it out..... Keep very specific notes and you'll eventually get it down pat....
Yes....2 gallons an hour is about what I lost...but that seemed way high. It was actually less than that because I wasn't able to collect all of the wort due to all the hop "residue" at the bottom of the boil kettle....but still in that ball park.
__________________
hopmadness is offline
 
Reply With Quote Quick reply to this message
Old 03-24-2009, 01:30 AM   #8
Blender
Feedback Score: 0 reviews
 
Blender's Avatar
Recipes 
 
Join Date: Jan 2006
Location: Santa Cruz, CA.
Posts: 3,116
Liked 5 Times on 4 Posts

Default

It takes a few brews and then you will have a pretty good idea on how much you loose. I start with 8 gallons and end up with 5.5.

__________________

Gary

Blender is offline
 
Reply With Quote Quick reply to this message
Old 03-24-2009, 02:05 AM   #9
hardrain
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2008
Posts: 155
Default

I learned this the hard way on AG batch #1, this second time I added an extra .5 gal, pre-boiled 7 total, ended up with 5.75 gal after the grains, and poured almost exactly 5 gal into the fermenter after the boil. Like other people said, you really need to just take good notes and make adjustments.

__________________
hardrain is offline
 
Reply With Quote Quick reply to this message
Old 03-24-2009, 07:34 PM   #10
Boar Beer
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
Boar Beer's Avatar
Recipes 
 
Join Date: Mar 2008
Location: Central NH, NH
Posts: 575
Liked 16 Times on 13 Posts

Default

It takes a bit
2 galons per hour is a good number to start with.
You have a big variable in what you leave in the boil kettle. We dump almost everything into the fermenter which doesn't seem to cause any problem
Our rate of evap goes all over the place depending up on rate of the boil, out side temp, wind ( we boil outside) and how close we are watching things.
If you want to know where you are just cut the heat and let it stop boiling and take a measurement. Mark the inside of you brew kettle or put some markings on a spoon.

Remember that you have a lower volume when the wart cools down.

Get a lower volume up goes the alcohol %
Or dump in some water.

__________________

I was married for 10 years before my wife knew I drank.
Then one day I made a mistake and came home from work sober


Minus33.com

Boar Beer is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
What's an accurate evaporation rate for the hour long boil? Tankard All Grain & Partial Mash Brewing 33 03-16-2014 09:48 PM
High Evaporation Rate spin02 General Techniques 10 07-16-2009 09:14 PM
Temperate/humidity on evaporation rate? chode720 Beginners Beer Brewing Forum 3 05-14-2009 11:07 PM
help with evaporation rate killian General Techniques 11 08-11-2008 11:40 PM
Evaporation rate maltMonkey General Techniques 7 04-17-2008 06:38 PM



Newest Threads

LATEST SPONSOR DEALS