First post here on this forum.
I've been using BS2 for some times now, but just recently for a new 5hL brewery. I've managed to set up my equipment profile to get quite reliable predictions overall, except for my OG.
Take for example my last batch stats:
Est. preboil G: 15.07 P
Meas. preboil G: 15.10 P
Est. OG: 16.96 P (which I thought was too high according to previous batches and a rough estimate based on my boil-off rate)
Meas. OG: 16.35
All my volumes (pre- and post-boil, evaporation rate, trub and chiller losses, batch size) where spot on.
I suspected a boil-off calculation error so I went on to play with the Boil off tool. With the shrinkage rate set at 4%, I get the same estimated OG (16.99 P), but the post-boil volume includes this "loss," contrary to the Equipment profile's calculated Post boil volume. If I set the cooling shrinkage to 0, I get the exact measured OG I got on this batch (16.35 P) and the tool's post boil volume matches the equipment profile's one.
So, it is obvious that BS2 counts the cooling shrinkage as a water loss the same way as evaporation, but it's not. Shrinkage is just that: shrinkage. It has no effect on gravity (when temperature corrections are accurately made).
Has anyone had this problem and what are the possible solutions?
Any help will be appreciated.
PS. Using version 2.3.12
EDIT:
In fact, i did find a way around but it's at the expanse of my setting's accuracy. First, my equipment profile was already set up as described in this post: http://www.beersmith.com/forum/index.php/topic,8579.0.html
Now, if I go to my recipe's equipment profile, set the cooling shrinkage (4% or 22 L in my case), to 0 and add this 22 L to trub and chiller losses instead, I end up with the same post-boil and batch volumes, which are correct. But, the est. OG is still off at 16.96, and the est. pre-boil G is now off at 15.66.
To make these estimates match my readings, I have to change my BH efficiency according to the BH measured efficiency. In other words, at this point, I don't mind the est. and measured Mash efficiencies as described in the above mentioned post; anyway they don't change and are still equal with this adjustment.
On screen, it works. I will test it tomorrow. But as I said, it's a way around, certainly not how it should be.
I've been using BS2 for some times now, but just recently for a new 5hL brewery. I've managed to set up my equipment profile to get quite reliable predictions overall, except for my OG.
Take for example my last batch stats:
Est. preboil G: 15.07 P
Meas. preboil G: 15.10 P
Est. OG: 16.96 P (which I thought was too high according to previous batches and a rough estimate based on my boil-off rate)
Meas. OG: 16.35
All my volumes (pre- and post-boil, evaporation rate, trub and chiller losses, batch size) where spot on.
I suspected a boil-off calculation error so I went on to play with the Boil off tool. With the shrinkage rate set at 4%, I get the same estimated OG (16.99 P), but the post-boil volume includes this "loss," contrary to the Equipment profile's calculated Post boil volume. If I set the cooling shrinkage to 0, I get the exact measured OG I got on this batch (16.35 P) and the tool's post boil volume matches the equipment profile's one.
So, it is obvious that BS2 counts the cooling shrinkage as a water loss the same way as evaporation, but it's not. Shrinkage is just that: shrinkage. It has no effect on gravity (when temperature corrections are accurately made).
Has anyone had this problem and what are the possible solutions?
Any help will be appreciated.
PS. Using version 2.3.12
EDIT:
In fact, i did find a way around but it's at the expanse of my setting's accuracy. First, my equipment profile was already set up as described in this post: http://www.beersmith.com/forum/index.php/topic,8579.0.html
Now, if I go to my recipe's equipment profile, set the cooling shrinkage (4% or 22 L in my case), to 0 and add this 22 L to trub and chiller losses instead, I end up with the same post-boil and batch volumes, which are correct. But, the est. OG is still off at 16.96, and the est. pre-boil G is now off at 15.66.
To make these estimates match my readings, I have to change my BH efficiency according to the BH measured efficiency. In other words, at this point, I don't mind the est. and measured Mash efficiencies as described in the above mentioned post; anyway they don't change and are still equal with this adjustment.
On screen, it works. I will test it tomorrow. But as I said, it's a way around, certainly not how it should be.