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rassd71
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PostPosted: Jul 25th, '07, 02:51 
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Very cool stuff. I've definitely found another great group of people!
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steve
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PostPosted: Jul 25th, '07, 14:11 
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Cool just found a use for my unused half blue barrels ;)
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Food&Fish
 Post subject: Re: Windmill aeration
PostPosted: Jul 25th, '07, 15:28 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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Today went to the seres eco village farm at brunswick they have lots of solar pannels wind generators solar water pumps ect well worth a look there doing an aqua system to.Farmers market today got a nice basket of organic vegetables cost $520.00 $20.00 for the vegies $500.00 for doing my no claim bonus [after i crashed into a taxi ]
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Delgrade
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PostPosted: Jul 25th, '07, 22:17 
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Ouch thems some pricy vegies
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steve
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PostPosted: Jul 25th, '07, 22:53 
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no injuries i hope? except to the wallet!
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Food&Fish
 Post subject: Re: Windmill aeration
PostPosted: Jul 26th, '07, 05:00 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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Na only pride and money
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RupertofOZ
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PostPosted: Jul 26th, '07, 09:30 
How'd ya get home.... taxi :D
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meancoyote
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PostPosted: Jul 26th, '07, 10:24 
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no claim bonus ????????
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Food&Fish
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PostPosted: Jul 26th, '07, 14:42 
Seriously, this cant be healthy.
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meancoyote wrote:
no claim bonus ????????

Here in aus if you dont have a crash your premiums are very cheap when you crash instead of putting up premiums you pay the first $400 or $500
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earthbound
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PostPosted: Jul 26th, '07, 15:44 
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Man it took me ages to get off that ecogeek site, lots of interesting stuff there... :)
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rassd71
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PostPosted: Jul 28th, '07, 01:56 
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I'm glad no one was hurt.

I have a question, or should I say questions...

What is the best way to transfer the direction of motion? If I have a vertical shaft turning and I want it to turn a horizontal shaft, what's the best way to do it?

And is there a cost effective way to do it?

And what about materials? I'm concerned using galv steel pipes because of the potential for poisoning the water, I've been told that crayfish are extremely sensitive to metals in the water.

Thank you in advance for your help.
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rassd71
 Post subject: Re: Windmill aeration
PostPosted: Aug 5th, '07, 06:40 
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Jaymie,
On the Geyser Pump thread, you posted a pic of a shaft with an old plastic fan blade on it. May I ask what was mounted to the other end of the shaft? And what type of gear are you using to transfer the motion? Can I see a couple pics of the mounting of the fan and the other end?


Jaymie wrote:
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Of course, a large, slow moving axial flow pump will be more efficient still. Perhaps take an old exhaust fan and remove the plastic blades from the motor and put them on a long metal rod and turn that with a 1W low voltage DC geared motor such as you can buy at d*ck sm*th. (Remember, we want slow)


This is an alternate version, not related to venturi's or water pumping, but to aeration. We've finally got a prototype going of the windpowered aerator. We'll probably change the fan blade over to an old industrial aircon fan (bigger, better blade shape etc)

The photo also shows the auto-maggot-feeder.


Image

I'm personally thinking about making a single level Savonious Wind turbine made from a blue plastic barrel. Like these...

Image

Image

I'm not sure what type of a fan or fish finger maker I'll use in the tank...
But I'm not sure what to use for the materials for the shaft and gear that wouldn't introduce metals to the water.
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Jaymie
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PostPosted: Aug 5th, '07, 07:53 
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Rass, what you see is what you get with that fan blade. The idea was to have the wind blow across the blade and just stir the water a bit. It didn't work too well because the tide would go out and the fan wouldn't contact the water. I think the bolt holding the fan blade on also rusted onto the fan and it didn't turn too well.
It has since been removed.

Another idea we have is for a fan of some description to be above the roof of the greenhouse and to drive a small bellows pump that is in or near the water to provide aeration. One problem with this is that my FIL nicely bought us a bellows type pump and then put it in a safe place... I wish we knew where that was :?
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steve
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PostPosted: Aug 5th, '07, 10:16 
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stainless steel is always a good choice.
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rassd71
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PostPosted: Aug 5th, '07, 10:45 
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Ah, ok Jaymie. So it was loosely mounted and not driven by anything. hmmm, I'm definitely looking to do a similar design but an air driven mechanical aerator. An air driven version of the 'paddle wheels' that are used so often in pond aeration.

steve wrote:
stainless steel is always a good choice.


Yeah, Titanium or Stelite J are grand too... but not always readily available or all that affordable! lol

I'm thinking about going with galvanized pipe and then using either acrylic or epoxy boat bottom paint to coat all the parts. I'm also thinking of having the drive shaft actually be off to the side of the main crayfish tank and using a 90* 1:1 gear. I just haven't found an affordable one yet. Just missed one on ebay today.

I'm not planning on this aerator being the primary system, but instead a redundant part of the system for Murphy's sake.
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