HOMEBREW Digest #5570 Tue 16 June 2009

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  Re: Mash tun size? ("Craig S. Cottingham")
  Mash tun size (Thomas Rohner)
  Re: Mash tun size? (donniestyle)

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---------------------------------------------------------------------- Date: Tue, 16 Jun 2009 00:43:53 -0500 From: "Craig S. Cottingham" <craig.cottingham at gmail.com> Subject: Re: Mash tun size? On Jun 15, 2009, at 12:02, drsmith <hbd at aperature.org> wrote: > The question on my mind lately is how much grain and water fits in a > 10 gallon space. I already have a 10 gallon cooler that could be used > for a simple infusion mash, but I'm uncertain if I can hit a 1.060 > gravity with it if I'm attempting a 10 gallon batch size. I have a 5 gallon cylindrical cooler I use as a mash tun, and I once got 14.5 lbs of grain into it and 5 gallons of 1.077 gravity wort out. There are too many variables to tell if your mileage will be the same, but generally speaking, yes, what you want to accomplish should be feasible. - -- Craig S. Cottingham craig.cottingham at gmail.com +1 (913) 826-6896 or Skype me at CraigCottingham OpenPGP fingerprint: 7977F79C Return to table of contents
Date: Tue, 16 Jun 2009 08:04:54 +0200 From: Thomas Rohner <t.rohner at bluewin.ch> Subject: Mash tun size If your mash tun equals your batch size, you are ok up to around 17P (around 1.068). For higher gravities, you can mash twice and only take the first runoff, or reduce the batch size. The boiler shoud be 30-50 percent larger than your batch size. (evaporation and boilovers) We intend to step up from 50 to 100 litres in the near future. (our 50 l 3 tier keg setup made some 250-300 batches over the last 10 years) We already have 3 wonderful 100 litre containers and we intend to enlarge the mash tun by 20 and the boiler by 50 percent. The mash tun gets enlarged, because it gets pretty full at higher gravities and we intend to add a electric mash mixer. Since you intend to do infusions in a non heated cooler, you may need more volume to reach the mash out temp. Or at least, you need to mash in pretty "dry". Our mash tun is heatable, so we don't need to add water until lautering. We wanted to do step mashes and be able to start at low temps. Maybe you get responses from "cooler mashers" as well. The picture may be a bit different there. Cheers Thomas Return to table of contents
Date: Tue, 16 Jun 2009 11:07:29 -0500 (CDT) From: donniestyle at directlink.net Subject: Re: Mash tun size? > Subject: Mash tun size? Searching HBD you can find information on calculating the mass of the mash. The formula I use was posted by Ken Eddy. Here it is. Total volume of mash = Wg (0.08 + MWR/4) gallons = Mg (0.67 + MMWR) liters Wg = weight of grain (lbs) MWR = Mash Water Ratio, qt/lb Mg = Mass of grain (kg) MMWR = Metric Mash Water Ratio, liters/kg One thing I found is it does not account for what is taken up for the false bottom. Another thing that I found is other formulas used to calculate the amount of infusion water to raise the mash temperature fall short of what is actually needed. For example, if I use 30 pounds of grain, and I use 0.8 qt per lb: Wg = 30 * (0.8/4 + 0.08) = 8.4 gallons. Return to table of contents
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