Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > No hassle MLT + HLT Combo Cooler (Will it Work?)
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Old 02-19-2013, 10:51 PM   #1
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Default No hassle MLT + HLT Combo Cooler (Will it Work?)

Basically the concept is;

-I dump 20 gallons of water into a cooler

- Plug it in and wait 30 minutes

- Dump a thirty pound Grain bill in there

-Come back an hour later , throw a couple valves

-Send 15 gallons of of 1.051 SG wort out to my Kettle

Here's a basic drawing that demonstrates what I'm planning. It's basically a 30 -50 gallon cooler divided in half vertically. I'm thinking I could build this for less than $500...



Will it work?


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Old 02-19-2013, 11:52 PM   #2
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Looks like it should work. It's as if you put a rims in your mash tun. It would be pretty cool to see something like this built. The only suggestion i would make is maybe add some sort of manifold to distribute the water evenly over the grain bed.


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Old 02-20-2013, 03:36 AM   #3
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I was brainstorming an idea similar to this. I thought of using an Omega CS-2110J-R as a temperature controller with a Fluke 80PK-22 K-Type thermocouple immersion probe. The problem that I ran into is the heating element. What electric heating element can heat 10 to 15 gallons of water with a low power requirement. It seems anything strong enough to heat that amount of water would draw too much current. Any ideas?
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Old 02-20-2013, 12:20 PM   #4
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Quote:
Originally Posted by scott7116 View Post
I was brainstorming an idea similar to this. I thought of using an Omega CS-2110J-R as a temperature controller with a Fluke 80PK-22 K-Type thermocouple immersion probe. The problem that I ran into is the heating element. What electric heating element can heat 10 to 15 gallons of water with a low power requirement. It seems anything strong enough to heat that amount of water would draw too much current. Any ideas?

I'm thinking a 2000 watt 120Volt hotwater heater element will pull about 16.66 amps, and should do the job effectively, plug it into a receptacle in your house that's fed from a 20 amp breaker and not sharing any load. Or get an element that's 208/220 volt and plug it in the receptacle for your clothes dryer or electric stove.
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Old 02-20-2013, 12:27 PM   #5
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Just a warning, a 2000W element will take significantly longer than 30 minutes to heat 20 gallons of water to strike temps.
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Old 02-20-2013, 12:38 PM   #6
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Just a warning, a 2000W element will take significantly longer than 30 minutes to heat 20 gallons of water to strike temps.
How long do you think it would take?
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Old 02-20-2013, 01:07 PM   #7
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How long do you think it would take?
Well, figure like this:

1 BTU will heat 1 pound of water 1 degree F, and you want to take 20 gallons of water (166 pounds) from roughly 70F to 150F (80F). That means 13280 BTUs.

1 kwh = 3414 BTUs, so a 2kw element will put out 6828 BTUs per hour.

Assuming you have no heat loss at all, you'd be looking at around 2 hours or so.
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Old 02-20-2013, 02:14 PM   #8
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Quote:
Originally Posted by MalFet View Post
Well, figure like this:

1 BTU will heat 1 pound of water 1 degree F, and you want to take 20 gallons of water (166 pounds) from roughly 70F to 150F (80F). That means 13280 BTUs.

1 kwh = 3414 BTUs, so a 2kw element will put out 6828 BTUs per hour.

Assuming you have no heat loss at all, you'd be looking at around 2 hours or so.
Thanks for that math, I'm a bad engineer for not figuring that out myself. I guess I'm going to have to go 240V, and use a 6KW element. Should get me to mashable temps in about 45 minutes.
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Old 04-29-2013, 12:23 AM   #9
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I built it!!! Needs a little bit of redesign, but over all it works really well, made my first 15 gallon all grain batch with it on Saturday. Check out the video:

http://youtu.be/ZRpLAgMz-lQ
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Old 04-30-2013, 02:42 PM   #10
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Pretty sweet, let us know what kind of efficiency you are able to get out of that system.


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