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Weezy's induction-thermal wire Brutus 20

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Weezy

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I finished my Brutus 2.0 rig, finally. Thanks to Lonnie Mac for putting this brew method out there.

weezys-b20-63096.jpg


I've been through a few iterations of electric brewing. The goals for the system were:

1. no elements touching the wort,
2. easy cleanup,
3. incorporate BIAB bag to permit double crushing, shorter mash times (and easy cleanup)

I only do 2-3 gallon batches, so heating requirements are lower than for 5+ gallon batch brewers. This rig only needs two 15-amp circuits.
The system relies on two different sources of heat. I have an Avantco 1800W induction cooker for heating strike water and boiling, and a high wattage thermal wire powered off an Auberins PID with 10-amp internal relay (SYL-2342) for maintaining mash temps. I thought about using two induction cookers, but assumed I couldn't get the temp control I wanted out of an induction cooker alone for mashing.

b20-front-63097.jpg


A couple years ago I picked up a 940 watt thermal wire from Omega.com. I wrapped it around a 22 Quart SS pot, and I've used it quite successfully as my mash tun. At first, I used in a sort of RIMS setup, with the wire wrapped tightly around about 15" of loosely coiled copper tube. It worked probably better, as far as thermal transfer, in that scenario. But I like it better wrapped directly to the pot because this setup lets me sour mash for a day or two quite easily at 105-110*F. I used to run it off a Sous Vide controller, until it died. This new setup runs it right off the PID w/o the need for an SSR. The internal 10-amp relay is plenty for the 940 watt wire.

b20-left-63098.jpg


To keep the clutter down, I gutted my pump box and put the pumps & PWMs, into a new 8" Home Depot conduit box along with the PID, ebay 120V-25A switches (the switches light up when on, which is helpful), and a three prong through wall mount outlet to plug the element into (the black square on the left side photo...poor quality pics, I must say). Wiring was simply. Two separate plugs go into the box, keeping the pumps on a separate outlet plug from then PID/element circuit. They both can go to the same 15 amp circuit, since the pumps plus the element are <10 amps. For now, until my home brewery space is done, I run the pumps+element off a 13 amp extension cord to another circuit and I plug the induction cooker directly into the local circuit.

b20-right-63099.jpg


I had some aluminum stock that bent into a stand, to keep this thing off the table and potential puddles.

You can read more about the plumbing (1/2" PEX barbs + 3/8" silicone hose = good stuff) in my pump box post, linked above.

I haven't brewed on it yet but I ran water through it all, including running the heaters, to verify everything is working. First brew this weekend....wish me luck! I'm going to do something very simple to test efficiency and system losses. I'm targetting 70% efficiency but hope for ~75% in the end.
 
Love the idea of this setup, especially as I'm now a 3gal brewer also.

Eventually I want to do something similar but with a cooler/RIMS tube setup so it's exciting to see the systems and how they all work together.

Definitely want to do some research on the PEX fittings, those things look perfect for disconnects.

:mug:
 
Yeah, the 1/2" PEX barb holds 3/8" silicone very tightly with them just pushed on. As long as you don't use a high pressure, high flow rate pump (chugger, etc.), the silicone will stay put.

Cooler/rims??? definitely check out Skidmist's mash in a bucket thread:
https://www.homebrewtalk.com/f36/mash-bucket-system-399490/
Real nice, clean, simple build.

I may pick up another of the cheap 16 quart, $12 Walmart pots (the one on the right). The 22 quarts overkill for the beers I brews (primarily low gravity stuff). Mashing will be more efficient in a smaller, skinnier pot for small batch, low grav beers. Someone here (can't find thread) was using a cheap hot plate for controlling mash temps. something like this at 1000W
I think that's a great idea and will likely do that to go with the 16 quart pot. I'll keep the thermal wire and 22 quart pt for high grav brews and sour mashing.
 
Yeah, the 1/2" PEX barb holds 3/8" silicone very tightly with them just pushed on. As long as you don't use a high pressure, high flow rate pump (chugger, etc.), the silicone will stay put.

Cooler/rims??? definitely check out Skidmist's mash in a bucket thread:
https://www.homebrewtalk.com/f36/mash-bucket-system-399490/
Real nice, clean, simple build.

I may pick up another of the cheap 16 quart, $12 Walmart pots (the one on the left). The 22 quarts overkill for the beers I brews (primarily low gravity stuff). Mashing will be more efficient in a smaller, skinnier pot for small batch, low grav beers. Someone here (can't find thread) was using a cheap hot plate for controlling mash temps. something like this at 1000W
I think that's a great idea and will likely do that to go with the 16 quart pot. I'll keep the thermal wire and 22 quart pt for high grav brews and sour mashing.

That's the one that originally gave me the idea for the cooler/RIMS.

What I like about your system is the heat tape, and no wort/element contact. Not a huge deal I suppose, but definitely a bonus IMO.

I wonder how low of wattage you could get away with for the sake of maintaining the temps. I know you'll never be able to step mash with it, but if 600W will hold the temp with the addition of the thermal mass in the cooler that's the ticket right there.

I use the 4gal wallyworld pot as a fermenter every now and then, also whips up a quick 1.5gal batch too on my Avantco if the mood strikes.

:mug:
 
the element not touching the wort was important to me. No special cleaning or care necessary, no rusting parts. This setup is clean in place. Add pbw water and let it cross circulate for 10 min, then rinse, then cross recirc with some starsan water.

600W might do it. It will just run more. Remember that with external electrical elements you're only getting a 35-50% transfer to the pot...soo 600 is ~300 to the wort.

here's the wire wrapped around a copper coil, used as a RIMS heater. This was my first test setup after buying the wire:

thermal-wire-on-coil2-63126.jpg


the sensor, I put through a PEX plug (~$0.84). Just drill a precise size hole and no sealant or anything is required.
probe-through-plug-63127.jpg
 
It works fine but its a pain to move pots on/off induction cooker for heating strike water, then heating sparge water in second pot. I need to buy a second cooker so I don't have to shuffle pots. I haven't yet cuz I'm building a home brewery room and will likely be going to 240V.

I'm also tinkering with a hack of the induction cooker hardware.
 
I've been using the wire for years with different controllers, long before I built this rig. It works great. No regrets buying it and it'll last forever. It worked very well in the rims setup I showed too, it was just a bit unwieldy. Some sort of permanent housing where you cant burn your hands or anything (sucker gets hot) of some sort would make that quite nice.

Hacking the induction? Let me keep that as a surprise :)


Just a general note on the wire. If anyone gets something like that and wraps it with the aluminum duct tape as I did, be sure to burn it in the first time outside. The heat will burn off alot of the glue and such and make quite a stink. After that first burn in, it doesn't do it anymore.
 
The wrapped RIMS is pretty slick and I've seen a few version of it over the years. I'd think it's just as easy to make it out of a straight piece of thinwall stainless tubing to keep tarnish down. Then it would be easy to wrap it with some rigid fiberglass pipe insulation.
 
I thought of going with a straight tube too, and permanently mounting it under the brew table with just a heatshield (buy a cheap straight piece of glavanized exhaust pipe). That would solve all the problems. It'll heat better than wrapping around the pot and it'll be out of hands reach. Although sour mashing will be out.

I can't find my notes on the heating rate of the thing but it was enough to step mash.
 
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