Hei,
Jeg kom over en kommentar på profil oppsettet til Grainfather i Beersmith2, er det noen som har erfaring til å si noe om grainfather profilen(add on) mot de endringene som blir foreslått her?
Det er klippet fra et annet forum:
GrainFather BeerSmith profile and approach
Looked at BeerSmith’s logic and tested it against the values I used and measured on 2 GF brews at the weekend - managed to come up with a profile and method that fits close enough for the moment.
This is a work in progress and I am pretty green when it comes to brewing so would appreciate anyone else’s comments and modifications.
Apologies for the long post. Thought I would explain as well as state.
A problem with BeerSmith is it doesn’t seem to handle single vessel brewing very well. It supports BIAB methods but these don’t use fly sparging or rims recirculation.
This profile is based on the following assumptions from the details in the GF manual.
Pre boil qty for 60 min boil is 28L at 100C to result in 23L at 20C temp in the fermenter. Calculated as – 23L in fermenter, 2L lost to boil, 1L Cooling & Shrinkage, 2L lost to trub & dead space in GF below pump inlet.
Grain Father equipment profile:
Brewhouse Efficiency: 75%, Hop Utilization: 100%
Mash Tun Vol: 30L, Mash Tun Weight: 4kg, Specific heat: 0.12, Lauter Tun deadspace: 0
Top up water:0, Boil time: 60mins, Boil off: 2L per hour, Cooling Shrinkage 4%
Loss to trub and chiller: 2L, Batch volume: 23L, Fermenter loss 1.5L
The GF has 3.5L dead space below the pipe (measured and confirmed) which is why 3.5L is added to mash water. GF recommend a 2.7L per kg mash water ratio and unless someone has a good reason I intend to stick to this.
I set the dead space for the mash lauter tun to 0 in BS as otherwise it messes up the calc for sparge water. It adds the dead space twice – once for mashing and once for sparging.
You need to calculate the intial strike water using the GF provided formula – (Grain weight (kg) x 2.7) + 3.5 (dead space) and enter this in the mash in step in the mash profile.
I also had to change the Grain absorption value under Tools:Options:Advanced to 0.8 – the figure GF recommend as otherwise sparge calcs are out. BS recommends 0.96. Do any more experienced brewers have any comments on this value and its implications?
Mash profile:
When creating a recipe I use the temperature - 1 step mash profile - select the one with the body you want but this just presets the mash temps which I override based on the recipe anyway.
I edit the stages
Mash In - type: temperature, Step temp: your mash temp, step time: your mash time, rise time - I set at 3-5 mins which gives the water enough time to come back up to temp when the grain is added, Water to add: I set this based on the water calculated using the GF formula, water grain ratio is auto calc based on water to add so ignore it.
Mash Out – type: temperature, step temp: 75.6, step time: 10, Rise time: 8-10 mins (about the time it takes mine to go from mash to mash out temps), water to add: 0.
The correct sparge water should now be calculated by BS on the mash page
It is .4-.5L greater than the GF calc. I think SB factors in something else but it is close enough for me.
Now everything works fine for me. Did a 60 min and a 90 min boil and the calcs it gave me were close enough.
