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Old 11-10-2012, 05:53 PM   #1
dirtyal
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Default 70 gallons with 2 x 4500w

Hello, my hlt, mash and brew kettle are insulated. Would 2 x 4500W on the HLT
And 2 x 4500w on the boil kettle be enough for 70 gallons start volume for the boil, 65 gallons final volume?
I was thinking about 2 x 5500w but my house breaker if 50A, so a I'd be pushing the limits.
I have 3 phase 220v comming in the house.
Tks for any input on that.
Takes,

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Old 11-10-2012, 07:10 PM   #2
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No scientific data to back my opinion, but I would surmise it would work, perhaps not to speedy ramping to temp but it would get it done. Since your kettles are insulated, given enough time all those watts need to go somewhere...boil / steam! Ambitious plan and I like it!

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Old 11-10-2012, 09:08 PM   #3
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Tks for the reply , I use a 89000 BTU burner and it does the job today, so I guess 9000w will get there and be safer on the house wiring at the same time,

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Old 11-11-2012, 06:58 AM   #4
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Check out this great thread: http://www.homebrewtalk.com/f51/squa...ctures-144764/


I think he's running two 5500s in a 55g boil kettle. My gut tells me that you will find the ramp up slow with your proposed set up. It will boil, but you'll be waiting. Does this help?

screen-shot-2012-11-11-4.56.13-pm.png  
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Old 11-11-2012, 12:17 PM   #5
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Here's a link to a spread sheet that will help you calculate electric requirements.

http://www.red-shift.net/stuff/Electric%20Heat.xls

Even at 100% efficiency it will take you over 3 hours to bring 70 gallons from 50 deg to boiling. Some of that time will be spent before the mash, but it will still take an hour to bring 7 gallons from 160 up to a boil.

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Old 11-11-2012, 12:29 PM   #6
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Great spreadsheet ChuckO! Thanks for posting.

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Old 11-11-2012, 01:16 PM   #7
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Quote:
Originally Posted by ChuckO View Post
..... but it will still take an hour to bring 70 gallons from 160 up to a boil.
That doesn't sound too bad to me? Perhaps run one element the night before to heat sparge / strike water? With a "slow to respond system", it just takes a bit more planning...you can't say, "I want to brew now" and be done in four hours, but the time spent heating initial volumes can be spent doing other things so it is not all that objectionable IMO.

If I may ask, what are you going to do w/ all that brew?
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Old 11-11-2012, 02:11 PM   #8
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Great spreadsheet chuckO, thank you very much.
I share the brew with friends and we share coasts for grain, hops and energy and I brew 2 times a month max. It is also a pilot brewery for a maybe future production brewery, but I am not sure I will be going the pro way yet.
I was reviewing the electrical needs and I will go with 2 x 5500W on each kettle, HTL and Boil. I will have a 3 phase brand new installation just for the brewery and I think it will handle them all right.
I am attaching a pic of my system. All kettles have conical bottoms for easy emptying and the boil kettle has a connection on the bottom and a little above the cone to let the trub behind and a hop dam.
Tks for all the help so far.

brew_day2.jpg  
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Old 11-11-2012, 02:22 PM   #9
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I forgot to mention that today I pre heat my water with a tankless gas water heater, so my water gets in the HTL at 148C, from there I heat it to 165F to add to the mash.

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Old 11-11-2012, 08:58 PM   #10
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Quote:
Originally Posted by dcarter View Post
Great spreadsheet ChuckO! Thanks for posting.
Wish I could take credit for it. I came across it while researching before switching my system to electric. I don't know the author, but it is available from a couple of URL's on the net.

Your time line doesn't sound too bad for 70 gallons, it's all in the perspective.
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