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Old 08-16-2012, 04:11 PM   #171
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I found this when I visited Beer Beer and More Beer aka Morebeer.com in California.

I was just perusing and for a couple bucks figured I'd try it out. I use it with my CFC and it seems to work GREAT!!!

Wort gets a good head of foam on it and my fermentations have all been solid. This has been the only aeration I've used on the last 6 batches.

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Old 01-22-2013, 01:08 AM   #172
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Just threw a Venturi rig together and used it on Saturday with excellent results! Video below... http://youtu.be/Ef0Ls4H4ufU

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Old 01-22-2013, 07:46 AM   #173
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Forgot where i read about this, but I just did a similar thing with some spare hose i had to transfer from my kettle to the fermenter.

I just took my thermapen and stabbed like 20-25 holes in the end of my 3/8ths tubing, it works really great.
It can be hard to see in the video, but you can definately hear it! The sound you hear in the video is all from the tubing sucking in air, not just background noise.

The key i found is to keep the holes closer to the kettle, the vacuum seems to be much stronger as it gets sucked out of the kettle which causes a lot of air to get in...the lower holes dont seem to contribute as much as the ones near the top...maybe its just in my head, but it sort of makes sense.

Even with a crapload of holes it doesnt leak with the ball valve fully opened...there is a microscopic amount of fluid that comes from the holes but just sits there and doesnt flow down the tube or anything...not that i care as even if it leaked it would still make it into my kettle.

Theres a huge stream of white from the air bubbles coming from all sides all the way down my 5' of tubing into my fermenter.

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Old 01-22-2013, 06:22 PM   #174
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Awesome thread thanks can't wait to try it

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Old 01-23-2013, 04:20 AM   #175
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This build inspired me to make my own aerator using the Venturi effect. I didn't want to buy an aeration stone and I was struggling with this build and it's effectiveness/ use of the Venturi effect.

So I went to the drawing board and came up with what I call the Wormaeter it is free and takes two minutes to build and is extremely effective. It definitely uses the Venturi effect I even conducted an experiment on you tube to prove it. It worked every time for me with no hassle.

If your interested check out this thread.

http://www.homebrewtalk.com/f51/wormaeter-free-quick-effective-wort-aerator-383836/#post4815599

Thanks for the inspiration!

Cheers

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Old 02-16-2013, 04:51 AM   #176
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Wow, what an ingenious idea! I've learned all about Bernouilli's Law and the venturi effect, but I'd never thought of using it to suck air into wort! Definitely going to have to try this.

One question: There is an obvious trade off where the venturi tube is placed.
1. Immediately after leaving the BK. This allows the longest amount of contact time between the wort and the air bubbles
2. Mid way down/near the bottom. Wort is traveling faster, creating a greater vacuum and pulling more oxygen in.

Can anyone confirm which has produced better results?


I'd also like to point out something that was mentioned much earlier in this thread (sorry I don't know the name of who mentioned it, but you take the credit for this one). Some sort of perforated plate should be placed immediately downstream of the venturi tube. This would serve to produce more turbulence and to break the bubbles into smaller bubbles, increase surface area and the rate of diffusion of oxygen into the wort. However, this is quite a restriction, and I'm not sure what effect this pressure loss effect would have on the rate of oxygen intake is.

Thanks again for this! Now no more lifting 50lb carboys!

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Old 02-16-2013, 12:30 PM   #177
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Wort doesn't travel faster further down the tube. It's all travelling the same speed unless you have a smaller pipe.

If you put some sort of diffuser inline, pressure before the diffuser would be higher. You might end up with wort exiting the holes rather than air entering them.

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Old 02-16-2013, 07:41 PM   #178
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So then putting this device right after the spigot to my BK will provide maximize its benefits?

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Old 05-26-2013, 01:12 AM   #179
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Heres another version of an inline T. Sorry about the bad picture but you can see all the air being pulled in below the T. I think it helps to have an 8-10 foor drop into the basement.

brew-day-016.jpg   brew-day-015.jpg   brew-day-013.jpg   brew-day-012.jpg  
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Old 11-06-2013, 03:46 PM   #180
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Quote:
Originally Posted by JayMac View Post
So then putting this device right after the spigot to my BK will provide maximize its benefits?
+1 and all my future brews. This method took me all of 5 minutes and aerated my wort as much as I would have wanted to. Thank you for the quick cheap fix. No more agitating or splashing as my only aerate method.
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