Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Efficiency Calculations in ProMash
Reply
 
LinkBack Thread Tools
Old 04-08-2006, 01:36 AM   #1
RichBrewer
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
RichBrewer's Avatar
Recipes 
 
Join Date: Feb 2006
Location: Denver, Colorado
Posts: 5,757
Liked 83 Times on 39 Posts
Likes Given: 67

Default Efficiency Calculations in ProMash

I've noticed that ProMash has an efficiency calculator on the recipe side as well as the session side. The problem I have is on the recipe side it says I'll get an OG of 1.060 with the recipe at 75% efficiency. On the session side I will document the brew and I end up with say 1.054 for my OG. The part I don't understand is that it tells me I got 81% efficiency. I'm assuming this is because of the water needed calculations that account for wort loss from the mash tun, brew pot, etc... How do you formulate a recipe in ProMash to get an accurate starting gravity? Do you have to account for wort loss on the recipe side as well?
Am I reading too much into this?

__________________

Cheers,
Rich

RichBrewer is offline
 
Reply With Quote Quick reply to this message
Old 04-08-2006, 01:46 AM   #2
Baron von BeeGee
Beer Bully
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Baron von BeeGee's Avatar
Recipes 
 
Join Date: Jul 2005
Location: Barony of Fuquay-Varina, NC
Posts: 5,419
Liked 16 Times on 15 Posts

Default

My method: on the recipe side you start with some random figure that seems somewhat reasonable, like 70%. Calculate your ingredients for the OG you wish to achieve at a given batch size. Buy your ingredients, and start a session...

Now, the most accurate time to get an efficiency reading (and we're really talking lauter efficiency here which is what homebrewers are usually talking about) is in the kettle - after lautering, but before boiling. The only loss that needs to be taken into account is the deadspace in your lautertun. You have a volume (such as 7 gallons), and you have a gravity reading (such as 1045 pre-boil). Put this into the efficiency calculation in the brew session (make sure to indicate reading taken in kettle and not in fermentor) and see what you efficiency is.

From this number you can start adjusting the efficiency number on the recipe side so that you don't use too little or too much grist. But it's an iterative process and requires several sessions, at least. I've also found grains matter, at least wheat. I get ~78-80% with all barley recipes, and more like 68-72% with wheat based grists.

__________________
Baron von BeeGee is offline
 
Reply With Quote Quick reply to this message
Old 04-08-2006, 02:07 AM   #3
davidkrau
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2006
Posts: 211
Default

How do you adjust the grains to get a specific gravity?After I've done my lautering and before the boil I determine the volume with a marked dip stick.I then take the SG and adjust for temp. At that point you can determine the efficiency but it's to late to adjust the the grains at least for that brew. I assume that the adjusting is for future brews. See my current Thread (I'm Confused )in all grain section

__________________
davidkrau is offline
 
Reply With Quote Quick reply to this message
Old 04-08-2006, 02:47 AM   #4
Mudd
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2006
Location: Southish Illinoid
Posts: 89
Default

Quote:
Originally Posted by davidkrau
How do you adjust the grains to get a specific gravity?After I've done my lautering and before the boil I determine the volume with a marked dip stick.I then take the SG and adjust for temp. At that point you can determine the efficiency but it's to late to adjust the the grains at least for that brew. I assume that the adjusting is for future brews. See my current Thread (I'm Confused )in all grain section
Basically, Yes.
BUT; if you are lower than expected, you can sparge a little more and boil it off to make your OG.
OR; you can calculate how much DME to add to bring up your OG.

After going thru the iterations /per Baron von BeeGee, you can ajust your grind and grain bill to hit your target gravities pretty reliably.

__________________
Mudd is offline
 
Reply With Quote Quick reply to this message
Old 04-08-2006, 02:57 AM   #5
RichBrewer
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
RichBrewer's Avatar
Recipes 
 
Join Date: Feb 2006
Location: Denver, Colorado
Posts: 5,757
Liked 83 Times on 39 Posts
Likes Given: 67

Default

Quote:
Originally Posted by Baron von BeeGee
My method: on the recipe side you start with some random figure that seems somewhat reasonable, like 70%. Calculate your ingredients for the OG you wish to achieve at a given batch size. Buy your ingredients, and start a session...

Now, the most accurate time to get an efficiency reading (and we're really talking lauter efficiency here which is what homebrewers are usually talking about) is in the kettle - after lautering, but before boiling. The only loss that needs to be taken into account is the deadspace in your lautertun. You have a volume (such as 7 gallons), and you have a gravity reading (such as 1045 pre-boil). Put this into the efficiency calculation in the brew session (make sure to indicate reading taken in kettle and not in fermentor) and see what you efficiency is.

From this number you can start adjusting the efficiency number on the recipe side so that you don't use too little or too much grist. But it's an iterative process and requires several sessions, at least. I've also found grains matter, at least wheat. I get ~78-80% with all barley recipes, and more like 68-72% with wheat based grists.
Nice job explaining and thanks!
That makes perfect sense to me. I'm going to try that on my next brew.
__________________

Cheers,
Rich

RichBrewer 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
Efficiency Calculations (cold break or not) bandt9299 All Grain & Partial Mash Brewing 6 01-04-2011 09:10 PM
Promash Far wrong! for IBU calculations scinerd3000 Brewing Software 7 05-20-2009 11:52 AM
SRM Calculations in ProMash DeathBrewer Recipes/Ingredients 0 05-04-2008 06:41 AM
Help with ProMash efficiency calc ESPY All Grain & Partial Mash Brewing 3 02-12-2007 07:22 PM
Calculating efficiency with Promash davidkrau All Grain & Partial Mash Brewing 2 04-03-2006 02:32 AM