Good stuff posting some numbers Ade
. This helps give a clearer picture and I'll come to those in a minute.
Before that though, a clarification on your clarification
. In BeerSmith, "brewhouse efficiency" actually refers to Efficiency into Fermenter." I just downloaded BeerSmith 3 to check that nothing has changed here and it hasn't. (Nice to see my name is still under the Major Contributors
So in Beersmith 2 (and now 3) you'll see the following terms, "Efficiency," "Mash Efficiency," and "Brewhouse Efficiency," depending on which screen you are looking at. Where it says "Efficiency" or "Brewhouse Efficiency," it means Efficiency into Fermenter. When it says "Mash Efficiency," it means Efficiency into Kettle.
[The above paragraph may give you an idea as to why I spent a lot of time over a few years developing Clear Brewing Terminology.]
So, in Beersmith you have to type in (guess) your Brewhouse Efficiency (Efficiency into Fermenter) in your Equipment Profile - there is no option to type in (guess) your "Mash Efficiency" (Efficiency into Kettle). What this means is that if a BeerSmith brewer (or any other mainstream software user) sets an "efficiency" figure in "their profile," they are going to experience the following problems...
1. They brew a high gravity brew with a heap of hops and find themselves with far less volume into fermenter and at a lower gravity than was estimated.
2. They brew a low gravity brew with few hops and find themselves with too much volume into fermenter at a higher gravity.
3. Any combination of the above.
To avoid the above problems, they really would need to set up countless "Equipment Profiles" that matched what they were brewing. The BIABacus avoids all that; it calculates the "real" maths for you.
It's really important to understand the above.
The following are facts...
It is impossible for a high gravity brew to have the same Efficiency into Kettle as a low gravity brew.
It is possible for a high gravity brew with very few hops have the same Efficiency into Fermenter as a low gravity brew with a heap of hops.
What I think I should do is write a proper official thread on all this. (Just noticed a few "first posts" that mention being worried about "efficiency".) It will take a day or two, without distraction, to write well but it is way overdue. Until then, let's have a look at...
Your Numbers Ade
If I write the following well, you might go
. But, you shouldn't. This is hard stuff for the brain to take on when you've been unwittingly mislead into thinking "efficiency" is a constant. (It took me several years of questioning, along with others, and then experimenting before I was able even see what is now obvious.)
You have three brews and have listed their EIB, EAW and EIF. The first thing to realise is that EIB and EAW are both measures of Efficiency into Kettle, they are just taken at different times. In other words, EIB and EAW should match. Why?
If I put one teaspoon of sugar in a cup of coffee and then boil half of it off, the coffee will just taste like I added two teaspoons. Sugar doesn't evaporate.
The second thing to realise is that Efficiency into Fermenter must always be lower than your kettle efficiencies (EIB or EAW). Sugar does not drop from the atmosphere into the hose you use to transfer from your kettle to fermenter
But, on your numbers we are seeing that your EIB and EAW are totally different from each other whereas they should be, in theory, identical. In practice, they'll rarely be identical du to measurement error but they should be pretty close.
Then we have your fermenter efficiency being higher than your kettle efficiency (or close to it) on all three brews. In other words, on your three brews, you miraculously ended up with more sugar in your fermenter than was in your kettle!
You wrote, "I suppose I need to apologise for knowing the "clear brewing terminology" (I read all the intro posts multiple times when I first joined here, really helped to take my brewing from an EIF of 60% to where I am now!!), but not using it in my posts. "
That's no problem. But, the phrase, "really helped to take my brewing from an EIF of 60% to where I am now!." is a problem
. Well, it's a problem for me.... it indicates that I'm failing to properly educate in this area and that I really must write a comprehensive thread on this whole subject.
Until then Ade, I want to see evidence you have searched and studied my posts that have the word "cousin" in them. I wrote that in my last post here but you missed that one didn't you?
I'll try and block out a few days in the next week and write on this whole subject so as we can knock it on the head once and for all.