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I've got my profile setup but can't seem to align the OG and IBU depending on pre-boil and post-boil/kettle volume. All the recipes appear to be just a little off when compared to other softwares. Any help or insight into how the equipment profile works with the editor would be appreciated. Sorry for the long post.
How my profile is setup:
I've got 1g of losses due to hoses/chiller when going kettle to fermenter. I also boil off 1.5gal per hour. Shrinkage is at 4%. So my pre-boil volume is usually 8.3gal which boils off down to 6.8gal and with shrinkage gets me to 6.5 in the kettle. Then i transfer to my fermenter getting 5.5gal. After fermentation and bottling losses i end up with 5gal of beer in a keg.
When i build a recipe I would expect to put either "5.5" for fermenter or "6.5" for ending kettle and 8.3 for preboil. The issue is that when flipping kettle <> fermenter nothing changes in the OG/IBU calcs. If i put 5.5 fermenter, then flip it to 5.5 kettle i would expect it to have thought the previous setup was "5.5 ferm, so 6.5 kettle" and now i have "5.5 kettle" so there is 1 gallon less wort... i'd expect the OG/IBU to go up as it thinks i've boiled off more water somehow. I'd be happy with just sticking "6.5" in there and building to suit as I know what my loses are, however; it appears leaving 6.5 affects OG. With a bel dubble i'm working i get 1.072 at 5.5 with fermenter, but 6.5 kettle gives me 1.061.
The issue is also present with 10gal batches... i do a 14g boil to get 12.5g of worth with .5g shrinkage ending up with 12g in kettle which results in 11g going into two fermenters (5.5 gall each). After .5 gallon loses on each fermenter i end up with two full 5g kegs.
I think there are two main issues i need help with:
1) It looks like OG doesn't account for your kettle loses if you specify ending fermenter volume. If i have 4qt of losses in my system from kettle to fermenter. When i swap from "6.5 kettle" to "5.5 fermenter" it shouldn't change OG because 5.5. fermenter is actually 6.5 kettle in my system. If i just leave 6.5 and swap kettle<>fermenter i would expect OG and IBU values to change but they stay the same. I can play with Brewhouse eff, but I feel like that number should be 'mash eff' or 'kettle eff' when doing 'ending kettle' and only allow it to say "brewhouse eff' when you pick fermenter. I would expect any value put into BH to be using total ending bottle volume to generate a total brewhouse eff of losses from mash to kettle, from kettle to fermenter, and from fermenter to keg/bottles.
I suspect i need to change efficiency from "72" to what my mash eff is (85% usually) when specifying "kettle" ... as the OG goes from 1.061 back to 1.072 matching what i had for 5.5 into the fermenter.
2) It appears the Calc for the IBU is tied to pre-boil volume more that I would think it would be. If i adjust preboil vol the IBU's change... which i'm not aware of any reason why it'd change so much (changing 8.3g to 5.5g goes from 26IBU to 21IBU). If I keep my hop additions the same (60min and 30min) but adjust my boil to be 90mins like i might do with a pilsner the IBUs should stay the same (which they do). The "ending kettle" number has not changed but due to the extra 30 min boil i need to have 0.75gal more pre-boil to end up at the same ending kettle... so i adjust pre-boil from 8.3 to 9 and the IBUs change by more than 1 IBU. The IBUs for a recipe i brew often are 20 on one software but 26 in this. 1oz of 10%AA at 60 and .75oz of 4% aa at 30. A few IBU I would normally not care about, but 6 seems like a lot, and for a dubbel it throws it "out of style" by 1. Recipe seems fine, maybe i'm too picky but i want to get a grasp on these values before I get too far in.
This one too appears to match my previous software if i set efficiency to "85%" and kettle 6.5, i end up with 20ish IBUs. Putting 5.5 into fermenter and BH of 72 showing 26 IBU. It may help if the formulas were spit out on an "advanced" page so I could get an idea of what's happening. I have a feeling that since kettle<>fermenter toggling doesn't change anything that something is off; and that ending kettle with 85% eff is probably the more correct IBU display since it technically shouldn't be doing any calcs on kettle/fermenter losses. But i'm at a loss as to how the IBU would change once i have 6.5 in the kettle and transfer to the fermenter.. the IBUs wouldn't go "up" once the boil is done... 6.5 in kettle at 20ibu shouldn't be 5.5 in fermenter at 26ibu.
An IPA that I make at 1.066 and 54 IBUs works fine with 6.5 kettle and 85% eff; but if i change to 5.5 ferm with 72% eff i get 69IBU but a really close OG at 1.067.
How my profile is setup:
I've got 1g of losses due to hoses/chiller when going kettle to fermenter. I also boil off 1.5gal per hour. Shrinkage is at 4%. So my pre-boil volume is usually 8.3gal which boils off down to 6.8gal and with shrinkage gets me to 6.5 in the kettle. Then i transfer to my fermenter getting 5.5gal. After fermentation and bottling losses i end up with 5gal of beer in a keg.
When i build a recipe I would expect to put either "5.5" for fermenter or "6.5" for ending kettle and 8.3 for preboil. The issue is that when flipping kettle <> fermenter nothing changes in the OG/IBU calcs. If i put 5.5 fermenter, then flip it to 5.5 kettle i would expect it to have thought the previous setup was "5.5 ferm, so 6.5 kettle" and now i have "5.5 kettle" so there is 1 gallon less wort... i'd expect the OG/IBU to go up as it thinks i've boiled off more water somehow. I'd be happy with just sticking "6.5" in there and building to suit as I know what my loses are, however; it appears leaving 6.5 affects OG. With a bel dubble i'm working i get 1.072 at 5.5 with fermenter, but 6.5 kettle gives me 1.061.
The issue is also present with 10gal batches... i do a 14g boil to get 12.5g of worth with .5g shrinkage ending up with 12g in kettle which results in 11g going into two fermenters (5.5 gall each). After .5 gallon loses on each fermenter i end up with two full 5g kegs.
I think there are two main issues i need help with:
1) It looks like OG doesn't account for your kettle loses if you specify ending fermenter volume. If i have 4qt of losses in my system from kettle to fermenter. When i swap from "6.5 kettle" to "5.5 fermenter" it shouldn't change OG because 5.5. fermenter is actually 6.5 kettle in my system. If i just leave 6.5 and swap kettle<>fermenter i would expect OG and IBU values to change but they stay the same. I can play with Brewhouse eff, but I feel like that number should be 'mash eff' or 'kettle eff' when doing 'ending kettle' and only allow it to say "brewhouse eff' when you pick fermenter. I would expect any value put into BH to be using total ending bottle volume to generate a total brewhouse eff of losses from mash to kettle, from kettle to fermenter, and from fermenter to keg/bottles.
I suspect i need to change efficiency from "72" to what my mash eff is (85% usually) when specifying "kettle" ... as the OG goes from 1.061 back to 1.072 matching what i had for 5.5 into the fermenter.
2) It appears the Calc for the IBU is tied to pre-boil volume more that I would think it would be. If i adjust preboil vol the IBU's change... which i'm not aware of any reason why it'd change so much (changing 8.3g to 5.5g goes from 26IBU to 21IBU). If I keep my hop additions the same (60min and 30min) but adjust my boil to be 90mins like i might do with a pilsner the IBUs should stay the same (which they do). The "ending kettle" number has not changed but due to the extra 30 min boil i need to have 0.75gal more pre-boil to end up at the same ending kettle... so i adjust pre-boil from 8.3 to 9 and the IBUs change by more than 1 IBU. The IBUs for a recipe i brew often are 20 on one software but 26 in this. 1oz of 10%AA at 60 and .75oz of 4% aa at 30. A few IBU I would normally not care about, but 6 seems like a lot, and for a dubbel it throws it "out of style" by 1. Recipe seems fine, maybe i'm too picky but i want to get a grasp on these values before I get too far in.
This one too appears to match my previous software if i set efficiency to "85%" and kettle 6.5, i end up with 20ish IBUs. Putting 5.5 into fermenter and BH of 72 showing 26 IBU. It may help if the formulas were spit out on an "advanced" page so I could get an idea of what's happening. I have a feeling that since kettle<>fermenter toggling doesn't change anything that something is off; and that ending kettle with 85% eff is probably the more correct IBU display since it technically shouldn't be doing any calcs on kettle/fermenter losses. But i'm at a loss as to how the IBU would change once i have 6.5 in the kettle and transfer to the fermenter.. the IBUs wouldn't go "up" once the boil is done... 6.5 in kettle at 20ibu shouldn't be 5.5 in fermenter at 26ibu.
An IPA that I make at 1.066 and 54 IBUs works fine with 6.5 kettle and 85% eff; but if i change to 5.5 ferm with 72% eff i get 69IBU but a really close OG at 1.067.
