Kegconnection Complete Starter Kit and More Giveaway!


Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > How to check efficiency??

Reply
 
LinkBack Thread Tools
Old 03-06-2007, 05:32 AM   #1
BG73395
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2007
Location: Colorado
Posts: 16
Default How to check efficiency??

Hi everyone... I am new to AG and I was wondering how people check the efficiency of the mash...please help a noob out

__________________
BG73395 is offline
 
Reply With Quote Quick reply to this message
Old 03-06-2007, 12:13 PM   #2
Lil' Sparky
Cowboys EAC
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Lil' Sparky's Avatar
Recipes 
 
Join Date: Feb 2006
Location: Honolulu, HI
Posts: 4,013
Liked 48 Times on 32 Posts

Default

Read JP's ch 12-3 through 12-5. http://www.howtobrew.com/section2/chapter12-3.html


Then read the rest of his book!

__________________
Lil' Sparky is offline
 
Reply With Quote Quick reply to this message
Old 03-06-2007, 12:22 PM   #3
zoebisch01
Feedback Score: 0 reviews
 
zoebisch01's Avatar
Recipes 
 
Join Date: Nov 2006
Location: Central PA
Posts: 5,198
Liked 7 Times on 7 Posts

Default

Basically you compare your final gravity and the amount of grains in lbs to what the max pppg is for a given grain summed per grain, per amount of your total grain bill. The other thing is that grains aren't always exactly what the numbers are cited at, but for the most part they are fairly consistent from what I understand. This is your extraction efficiency I believe. Oh plus the OG is pre-boil and you need to accurately measure the amount of wort collected.

__________________
Event Horizon ~ A tribute to the miracle of fermentation.

Brew what you like. Do this, and you will find your inner brewer.

Last edited by zoebisch01; 03-06-2007 at 12:35 PM.
zoebisch01 is offline
 
Reply With Quote Quick reply to this message
Old 03-06-2007, 01:06 PM   #4
grnich
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2006
Location: Ottawa, ON
Posts: 162
Default

I use the following calculator:

http://www.tastybrew.com/calculators/gravity.html

I'm not sure, but you might have to sign up to use it.

__________________
grnich is offline
 
Reply With Quote Quick reply to this message
Old 03-06-2007, 06:11 PM   #5
ESPY
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2005
Location: Columbus, OH
Posts: 83
Default

"How to Brew" is a good reference and certainly there's web based calculators and software that'll do it too. But to summarize the manual calculation:

1) Measure the gravity and volume of the wort prior to the boil.

2) Determine the theoretical yield based on your ingredients and wort volume. For this you will need to refer to commonly published yield figures for each type of grain in the recipe (as listed in the "How to Brew" link above). The yield figures are generally reported as points per pound per gallon and represent the maximum possible gravity points from one pound of grain in one gallon of water. Use these figures to calculate the amount of gravity points possible from each grain in your recipe.

3) Calculate efficiency as (Actual gravity points) / (Theoretical gravity points).

Here's a simple example. Suppose you have a basic recipe such as 10 lbs 2-row and 1 lb of crystal-60.

1) You measure your pre-boil as 7 gallons at 1045.

2) Look up the yield values for the grain in your recipe:
2-row: 37 p/p/g
crystal 60: 34 p/p/g

Calculate the theoretical points for 7 gallons of wort:
[(10lbs x 37 p/p/g) + (1lb x 34 p/p/g)] / 7 gal = 57.7 theoretical points

3) Calculate the efficiency: 45 actual points / 57.7 theoretical pts = 78%

It is possible to calculate using your after boil gravity and volume, but not as accurate unless you are able to account for all the losses.

SP
__________________
ESPY 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
Check my efficiency number please! Shoemaker All Grain & Partial Mash Brewing 5 10-29-2009 02:26 PM
How to I check my efficiency? pnj All Grain & Partial Mash Brewing 7 03-12-2009 07:44 PM
Efficiency Check... yeqmaster All Grain & Partial Mash Brewing 5 01-08-2009 12:15 PM
Could someone please check my calcs for this kettle-efficiency spreadsheet? denimglen All Grain & Partial Mash Brewing 2 04-04-2008 05:24 AM
Simple Way to Check Efficiency? RLinNH All Grain & Partial Mash Brewing 16 02-07-2008 01:13 AM