Hey phil, yeah I think I'm gonna try to make one of these bad boys, and I was also hoping the same thing even if it runs itself and nothing else..ha, do you think the stainless steel shaft will have an adverse affect on the ferril fluid, even though it's non magnetic... do you think I should get the smaller pump or the larger pump? And if I make a ferrell fluid, those recipes you mentioned earlier is it a lesser ferrell fluid? I wonder if before the magnetic driven pump he used this pump as a small magnetic partical turbine...he mentions something about that in the beginning of the lecture russ showed us. and indeed gas seems like the way to go...but I was a plumber in a past life..ha and my brain feels like it's going to bubble out of my head so for right now I'm wit chew.Quote from phil on August 12th, 2011, 02:24 PM Good find on that pump mate, I was hunting around for that for ages. I had to settle for a swimming pool pump in the end, chose it because all the parts are non magnetic or plastic. Ive actually nearly finished mine just the electronics and ferrofluid now, ive had to wait for a spare motor to crop up at work. youve actuallly done me a big favour in confirming that red pump is for liquid and not gas. Thanks. I dont really expect its goin to let me live off the grid but i do expect to see some sort of effect, at least to prove the concept. Maybe ill have it up and running in 3-4 weeks if you can wait that long, or by all means have a crack yourself, just bear in mind you could be adapting it for gas one day.
In Him
Bryan
Russ has all the dimensions of the mech EPG so if you can find a difference in size between the two models just compare it with russes measurments and you'll be sure to get the right one.
I see the pump operating at a zero head height as you will be backfeeding it in a closed loop i think it could easily overspin itself, hence another good reason for the speed control.
Ive not tried that ferrofluid recipe. Its just something i found. It will be cheaper, but it will involve spending a weekend stirring an oil drum size bucket full of nasty chemicals, tipping chlorine gas all round you neighbourhood. Cheapest I found for me was £150 for 500ml, whatever that works out to in your country?
Keep track of the size of your coil and fill your pump body with water and empty it into a measuring jug to work out the volume of free space inside your pump. If you try and keep the whole thing under 500cc (ml) then 1 bottle will do. I tell you this coz i went over and have to buy an extra 100ml when i get round to filling mine.
I think the more sophisticated EPG's follw the red pump one, but if the red pump was good enough to make it onto the front cover of one of stans newsletters, then it must at least prove the concept.
Stainless shaft should be fine. Youve found the exact pump stan used, what you got to worry about? Good find! Most of them submersible pumps have magnetic shafts nowdays. Sure they r cheap but stan said non-magnetic so thats what i went with.