I really do not post often on boards, but I think I'll do an exception here.
While I do understand the geometry argument of the trub loss number and agree on the reason behind the trub loss number, it really does seems like a bug that adding more sparge water does not change the SG of the wort.
I think this is where the "bug" lies. Where is this additional volume of water added ? If it was added to Batch Size, then it would be accounted for in the OG calculation ( which is why I believe the fermenter loss trick works). By adding this 2L trub loss, Beersmith adds 2L water to my sparge water, does not change the batch size, does not change the OG.
Physically, this means I add 2L water to my mix of grain and wort, definitively changing the SG of the wort.
EDIT: It does indeed change the mash efficiency when modifying the trub loss. For a homebrewer, it feels counter-intuitive since it is not a variable we can reliably control. Changing the grain bill does not affect the mash efficiency. This does explain why I have been missing my OGs ever since I adjusted the trub loss.
So, what is the correct usage to account properly for loss volume ( before final wort ) and after final wort ?
While I do understand the geometry argument of the trub loss number and agree on the reason behind the trub loss number, it really does seems like a bug that adding more sparge water does not change the SG of the wort.
I think this is where the "bug" lies. Where is this additional volume of water added ? If it was added to Batch Size, then it would be accounted for in the OG calculation ( which is why I believe the fermenter loss trick works). By adding this 2L trub loss, Beersmith adds 2L water to my sparge water, does not change the batch size, does not change the OG.
Physically, this means I add 2L water to my mix of grain and wort, definitively changing the SG of the wort.
EDIT: It does indeed change the mash efficiency when modifying the trub loss. For a homebrewer, it feels counter-intuitive since it is not a variable we can reliably control. Changing the grain bill does not affect the mash efficiency. This does explain why I have been missing my OGs ever since I adjusted the trub loss.
So, what is the correct usage to account properly for loss volume ( before final wort ) and after final wort ?