Author Topic: Water/grain ratio  (Read 4940 times)

Offline PeeBee

  • BeerSmith Brewer
  • ***
  • Posts: 43
  • It was here a minute ago ...
Water/grain ratio
« on: February 20, 2019, 11:26:18 AM »
Perhaps an inconsistency rather than a bug?

The first mash step (tested with infusion type 1st step, rest temperature type) in a mash profile correctly calculates water/grain ratio (based on amount of water with grain = total amount of water less any for deadspace). Subsequent mash steps calculate without removing deadspace. So ratio changes without adding water which obviously isn't right.

For BIAB even first step includes water added for deadspace. So ratio doesn't change through the steps, but the ratio is "wrong". The Step 1 details do not include a "mash tun deadspace addition" like a "normal" (not a BIAB) mash.


Offline dtapke

  • BeerSmith Grandmaster Brewer
  • *****
  • Posts: 452
Re: Water/grain ratio
« Reply #1 on: February 20, 2019, 12:24:44 PM »
Not sure i follow, if you're setting up a single infusion(1) with a temp rest(2), your first volume will include the deadspace addition per your equipment profile. The second step will not add any liquid as it is a temp rest.

If you set up for a double infusion then the mash steps will provide a secondary volume to add to make the second mash temperature change. In the Mash section there's a check box to add for deadspace.

Can you upload a .bsmx with the recipe you're having concerns about and explain where you think the discrepancy is? you can alter the water/grain ratio, the deadspace volume, and the grain absorption rate as needed if you feel it's off.
32g eHERMS
Drinking: Dopplebock, NEIPA, Pils
Primary: empty
Secondary/Lagering:
Next Brew: RIS

Offline PeeBee

  • BeerSmith Brewer
  • ***
  • Posts: 43
  • It was here a minute ago ...
Re: Water/grain ratio
« Reply #2 on: February 22, 2019, 04:23:04 AM »
The attached is what I'm brewing right now.

Ignore the kooky structure of the mash schedule as a more conventional structure acts the same way; it's my workaround to get a Grainfather Connect session to handle "strike" (which the makers don't believe it needs). "Strike" is the first step, an "infusion" step, "saccharification" the second step, a "temperature" step. The steps get out of order (hence numbered) so the "strike" step may need moving up to the top - but that's another issue.

The first, infusion, step includes the newish (v3 only?) "mash tun deadspace addition" and has the water/grain ratio as 2.7. Good.

The second, temperature, step does not have the "mash tun deadspace addition" field and includes that addition as a quantity in the water/grain ratio, so the ratio is now 3.45 despite no water addition.

for "BIAB" you never get a "mash tun deadspace addition" so the ratio is always 3.45. It was while messing with "BIAB" feature (using "full boil mash" with Grainfather Connect) that the problem showed itself.
« Last Edit: February 22, 2019, 04:52:10 AM by PeeBee »

Offline dtapke

  • BeerSmith Grandmaster Brewer
  • *****
  • Posts: 452
Re: Water/grain ratio
« Reply #3 on: February 22, 2019, 09:11:29 AM »
Trying to figure out your mashing goals here...

if you set up a single infusion to 144 it should automatically heat your water to the appropriate temperature?

Also, your grain temp and mash tun temps are 153.1, you input the temps BEFORE heating here.

I'm just trying to figure out what your goal schedule would look like,

how much water do you want to use, what temperature steps, how many steps.

your mash profile just looks totally messed up and i think thats your issue, is just setting it up properly, I'm sure theres some tutorials on setting up a mash profile as well, but I'll gladly try and help figure out what you've got going on here.
« Last Edit: February 22, 2019, 09:34:05 AM by dtapke »
32g eHERMS
Drinking: Dopplebock, NEIPA, Pils
Primary: empty
Secondary/Lagering:
Next Brew: RIS

Offline Oginme

  • BeerSmith Grandmaster Brewer
  • *****
  • Posts: 2888
  • Goats, guitars, and a home brew; Life is good!
    • Longvu LaManchas
Re: Water/grain ratio
« Reply #4 on: February 22, 2019, 09:57:41 AM »
I am also confused by your steps in the mash schedule, but I think I understand your point. 

Once that initial water has been added and the water to grain ratio set, then the program considers all water addition in the subsequent steps.  On the surface, one might say that this skews the perception of water to grain when steps are considered.  Unlike a single infusion mash in a mash tun where the water under the false bottom and not in contact with the wort would only passively participate in the mashing process of solubilizing the starches and enzymes only through the osmosis of the fluids from the grain basket into the water below, the Grainfather has a pump which recirculates the fluid bringing it all into contact with the grain bed.  Additionally, with such a device, temperature steps would be done through that recirculating system and not with subsequent infusions of water.  I think this is what is confusing about the mash profile as it comes up.  Your steps are numbered 2. Saccharification, 1. Strike, and 3. Mash out.  Ideally, you would add the water and then strike with the grains initially at the lower temperature, then after suitable rest, bring the temperature up using the Grainfather to saccharification temperatures.  No additional water should be needed and the calculation of water to grain ratio which excludes the water under the mash pipe only comes into play at the initial water addition.

The fact that the subsequent water to grain calculations uses the water under the mash pipe in subsequent mash steps is really immaterial once you start recirculating it.

Recycle your grains, feed them to a goat!

Offline dtapke

  • BeerSmith Grandmaster Brewer
  • *****
  • Posts: 452
Re: Water/grain ratio
« Reply #5 on: February 22, 2019, 10:49:09 AM »
I would think your mash would look more like this if you're performing a single infusion mash? (assuming a 144F mash as you entered)
32g eHERMS
Drinking: Dopplebock, NEIPA, Pils
Primary: empty
Secondary/Lagering:
Next Brew: RIS

Offline PeeBee

  • BeerSmith Brewer
  • ***
  • Posts: 43
  • It was here a minute ago ...
Re: Water/grain ratio
« Reply #6 on: February 22, 2019, 11:15:17 AM »
...  Your steps are numbered 2. Saccharification, 1. Strike, and 3. Mash out.  ...
Ah. So they are appearing out of order for you too. I mentioned this: "1. Strike" should be the 1st step. It appears to be an issue (not fixed by my attempts - prefixing the step name with order), but it isn't the one I intended to report in this thread.

Offline PeeBee

  • BeerSmith Brewer
  • ***
  • Posts: 43
  • It was here a minute ago ...
Re: Water/grain ratio
« Reply #7 on: February 22, 2019, 11:28:32 AM »
Trying to figure out your mashing goals here...

if you set up a single infusion to 144 it should automatically heat your water to the appropriate temperature?

Also, your grain temp and mash tun temps are 153.1, you input the temps BEFORE heating here.

I'm just trying to figure out what your goal schedule would look like,

how much water do you want to use, what temperature steps, how many steps.

your mash profile just looks totally messed up and i think thats your issue, is just setting it up properly, I'm sure theres some tutorials on setting up a mash profile as well, but I'll gladly try and help figure out what you've got going on here.
I did warn you of some kooky workarounds! But they are not the issue, and the workarounds do work (but having the grain temperature at strike temperature is an unfortunate consequence).

The issue is inconsistent handling of the "water/grain ratio".

If you've got the stamina (the articles are quite long) this gives you a good idea of what I'm doing:
https://drive.google.com/file/d/11engfVsgy6okCgLiuwb8gc2gaMVahiV7/view?usp=sharing
https://drive.google.com/file/d/1ISrSYlK5q5Acf1xHgaZ8mC_0mm2UWuhA/view?usp=sharing

Offline PeeBee

  • BeerSmith Brewer
  • ***
  • Posts: 43
  • It was here a minute ago ...
Re: Water/grain ratio
« Reply #8 on: February 22, 2019, 11:54:39 AM »
I would think your mash would look more like this if you're performing a single infusion mash? (assuming a 144F mash as you entered)
Thanks. But that misses the point and has got way off subject. "Strike" step is described in Part 1 of my article under "mash profile with strike (optional)". It is done because Grainfathers have no concept of "strike", but I'm an "old dog" and won't learn these strike-less mash "new tricks".

I really shouldn't have posted that bsmx file. It was full of distracting little nibbets that haven't much to do with the issue I'm reporting (water/grain ratio).

The beer it features was what I was doing today, and is complete, waiting now for the yeast to burst into action.

Offline Oginme

  • BeerSmith Grandmaster Brewer
  • *****
  • Posts: 2888
  • Goats, guitars, and a home brew; Life is good!
    • Longvu LaManchas
Re: Water/grain ratio
« Reply #9 on: February 22, 2019, 12:02:13 PM »
...  Your steps are numbered 2. Saccharification, 1. Strike, and 3. Mash out.  ...
Ah. So they are appearing out of order for you too. I mentioned this: "1. Strike" should be the 1st step. It appears to be an issue (not fixed by my attempts - prefixing the step name with order), but it isn't the one I intended to report in this thread.

When i changed the order, the water all came in on the first step and showed the corrected water to grain ratio.  After that, there was no more water added until the sparge. 
Recycle your grains, feed them to a goat!

Offline PeeBee

  • BeerSmith Brewer
  • ***
  • Posts: 43
  • It was here a minute ago ...
Re: Water/grain ratio
« Reply #10 on: February 22, 2019, 12:23:12 PM »
...  Your steps are numbered 2. Saccharification, 1. Strike, and 3. Mash out.  ...
Ah. So they are appearing out of order for you too. I mentioned this: "1. Strike" should be the 1st step. It appears to be an issue (not fixed by my attempts - prefixing the step name with order), but it isn't the one I intended to report in this thread.

When i changed the order, the water all came in on the first step and showed the corrected water to grain ratio.  After that, there was no more water added until the sparge.
That's it! But notice the water/grain ratio has changed for the subsequent steps (seemingly these include the deadspace which the first doesn't). It would be better if the ratio was not shown at all in the subsequent steps.

But if you were doing a "full boil mash" ("BIAB") even the first step is bad.

Offline dtapke

  • BeerSmith Grandmaster Brewer
  • *****
  • Posts: 452
Re: Water/grain ratio
« Reply #11 on: February 22, 2019, 12:30:33 PM »
as oginme stated, changing your order also fixed that for me as well. and "Strike" isn't a task, but a temperature really, "strike" temp refers to the temp you need to reach to get the correct temperature for your mash. Therefore BS automatically provides you the "strike" temp when you set up a single infusion mash.

in fact even in your googledoc writeup your screenshots show the same thing. only the initial water addition.

Is the issue you're having perhaps that when you setup for a 67C mash, the grainfather connect does not automatically start with a temp high enough (75c?) to get your "Strike" temp?

32g eHERMS
Drinking: Dopplebock, NEIPA, Pils
Primary: empty
Secondary/Lagering:
Next Brew: RIS

Offline dtapke

  • BeerSmith Grandmaster Brewer
  • *****
  • Posts: 452
Re: Water/grain ratio
« Reply #12 on: February 22, 2019, 12:34:42 PM »
remove your recoverable mash tun deadspace from your equipment profile if you don't want to see the different water/grain ratios.

It is not listing the recoverable mash tun deadspace in your "strike" but it will list it in subsequent steps.

I think i see what you're getting at here, but i guess its a non-issue so i wouldn't think twice about it lol.
« Last Edit: February 22, 2019, 12:36:52 PM by dtapke »
32g eHERMS
Drinking: Dopplebock, NEIPA, Pils
Primary: empty
Secondary/Lagering:
Next Brew: RIS

Offline dtapke

  • BeerSmith Grandmaster Brewer
  • *****
  • Posts: 452
Re: Water/grain ratio
« Reply #13 on: February 22, 2019, 02:13:00 PM »
if you change your recoverable mash loss to 0, and set up as a full boil this issue remedies itself. see my attached screenshots, is this how you'd prefer it to set up?
32g eHERMS
Drinking: Dopplebock, NEIPA, Pils
Primary: empty
Secondary/Lagering:
Next Brew: RIS

Offline Oginme

  • BeerSmith Grandmaster Brewer
  • *****
  • Posts: 2888
  • Goats, guitars, and a home brew; Life is good!
    • Longvu LaManchas
Re: Water/grain ratio
« Reply #14 on: February 22, 2019, 05:00:32 PM »
As someone who does 90+% full volume biab, i really don't pay attention to the water to grain ratio.  I want the full volume of water which would give me a water to grist ratio well in excess of the minimum needed to ensure good starch solubility and enzyme mobility.  When i do step infusions on my 3v system, i only really care about the effective water to grist ratio in 5hat first step to ensure i meet that minimum as well.  Not sure there is an issue here that makes a significant difference. 

I di see what you are looking at, just not sure why it matters beyond the initial infusion step.
Recycle your grains, feed them to a goat!

 

modification