Rep said:
Or, size a mash tun to fit your terminal brewery capacity. I would think it is easier to hit your temps in one vessel rather than two. That BTW is MHO.
I agree that it's better to have a perfect size tun, and I'm going to get a 25 gallon boil kettle and convert my 15 gallon keggle to a mash tun with a heat exchange, but that takes time and money for me to build it.
Adding a cooler is a fast way that doesn't cost an arm and a leg. There's that and the fact that some 10 gallon batches require at least a 15 gallon tun and some parti-gyle brews require more. I'm not a fan of the typical square cooler either. I know that many many guys have great luck with them but I like the geometry of a tun that is a lot taller than it is wide ( like a gatoraid/water cooler ). The properties of heat transfer ( heat rises, the top where the heat is going is smaller relative, the top generally has dead air space and the sides are touching insulated walls ) along with the fact that the water has to pass through more of the grain makes me like that better.
Another advantage to his two cooler system is that a bigger tun solves the problem of not enough space, but if you want to brew 5 gallons of hefe for example, you don't want a 20 plus gallon tun with all that dead space. The more full it is the better the thermal properties. Multi cooler lets you size it to the brew day better.
Hitting the temp isn't a huge concern to me when using two coolers. If the coolers are the same, they start at the same temp, the water is the same temp and so is the grain, the math says that the mash will be the same, with the exception of any variation in my procedure ( time ) from one cooler to the other.
Scott Ickes said:
My apologies to the OP for the thread going away from grain storage. Here are two photos of my grain storage containers. They are all empty, because two days ago a did a 10 gallon batch and used up all of my grains and hops.
I put my base grains in the large bin. I have three different sizes of smaller rubbermaid containers on the shelves that I put other grains in. All I have left in those right now is toasted american oak chips and DME that I use for bottling.
No need to apologize for the deviation. I'm interested in building a variation on your system as a temporary solution to my tun's limitations.
I'm brewing a black butte clone in the next several days. The reason I'm doing five gallons instead of ten is the grain bill wont fit in a 10 gallon cooler. I've got an extra 5 and if I were to find a good deal on another 10 gallon cooler not only could I do ten gallons of black butte, but I could do a very good parti-gyle with 20 gallons. Your setup would let me use a five, ten, fifteen or twenty gallon tun.
I actually like the idea because if you run wort from the upper tun through the lower one, then sparge from the upper through the lower, you end up rinsing the grains very well.
The bottom tun gets every bit of the wort run over it's grains and the top one gets it's mash water, plus you could do all the sparge water into the top and let it run down through both tuns.
I might add a couple handfuls of rice hulls to the bottom tun just because with all that liquid running through it you would have a better chance of compacting the grain bed and getting a stuck sparge.
I may work on a variation on your system. Three tier with a hot liquor tank on the top. I probably have a few square coleman coolers to choose from for the hot liquor tank.
The only problem with my three tier version is I probably wont use the top level ( hot liquor tank ) until I buy the pump for the heat exchange system. I don't want to lift that much hot water that high.
It looks like no one has an answer to the 55 pounds of grain in a square Rubbermaid tub. I probably have 30 or 40 pounds of base malt around the house. I must have 10 or 15 pounds of other grains around. I should be able to put it in one of the larger tubs I have, push it all to one side and measure the length, width and depth required.
Then I can get the volume I need.
I figure that I want to be able to have three or four full bags and several grains in smaller quantities around. I should know how much a 5 gallon bucket holds off the top of my head since I use a home depot bucket under my mill. Seems like when I size a batch to my mash tun, I have about 24 pounds of grain and it almost all fits in a 5 gallon bucket when it's crushed.
A couple buckets should work for any grain that I plan to keep 15 to 20 pounds of on hand.
I want neatly stackable storage that I can either stack under my bar, in the corner of the room, under the daughter's air hockey table or a combination of all of the above!