dieselguy86
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Joined: September 2014
Posts: 186
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Post by dieselguy86 on Jul 13, 2015 20:42:27 GMT -5
John,
I'll have to email them. Hopefully they don't think I'm a terrorist when I ask for the chemical composition of 2 of the largest transmission lines in eastern US. A quick search on there site says the energy content can vary. The lines are 24" diameter, with thousands of psi of pressure.
I was thinking axial to keep things compact and maybe more efficient? Seems having 2 less 90° turns would be worth a couple extra efficiency points?
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dieselguy86
Veteran Member
Joined: September 2014
Posts: 186
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Post by dieselguy86 on Jul 13, 2015 9:00:45 GMT -5
I have kamps book that I'll have to find to get regreshed, but it should work for "roughing in" an axial turbine. Should I go this route, or would it work better using the radial turbo wheel? The turbo wheel won't leave much space for a combustor. Correct me if I'm wrong, but won't I need a "largish" combustor to process the extra amount of natural gas, since the energy density is so low?
The gt35r shaft is for a ball bearing turbo, is that fine or should I use journal bearings? I know journal bearings are alot more forgiving, but it will take more oil and pump to use them. I liked ash powers o-ring dampened bearing cartridge idea
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dieselguy86
Veteran Member
Joined: September 2014
Posts: 186
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Post by dieselguy86 on Jul 12, 2015 21:58:37 GMT -5
Should also add I'm not too worried about fuel efficiency, this thing won't run very often. A pretty simple water to air exchanger could be setup though if it would produce a significant increase in efficiency.
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dieselguy86
Veteran Member
Joined: September 2014
Posts: 186
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Post by dieselguy86 on Jul 12, 2015 21:54:04 GMT -5
Sure thing! Compressor is 53.1mm in, 71mm ex, 56 trim. Turbine is 68.8mm, 84 trim. I want a free power turbine. Ideally I'd like to have an axial turbine, followed by stators and then an axial free power to keep things compact. If I could find a couple chunks of inconel I could have my friend mill out the turbines. I'm a big fan of K.I.S.S. so I'm all ears for any ideas.
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dieselguy86
Veteran Member
Joined: September 2014
Posts: 186
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Post by dieselguy86 on Jul 11, 2015 21:32:54 GMT -5
Hi guys, been a lurker on here for a long time. Was a member of the yahoo groups back in the early 2000's, I've watched many an engine be put together, from rackets turbine powered bike, rc dons engines, ash powers t3 sized engine, and lastly the most amazing anders turbine.
I built my first turbine in 11th grade (03), powered it with diesel, won some science fair awards, but had to put it away due to having little money available to "r&r". 12 years later I have some machines and tooling, more experience, sometimes more money (depending on the wifes mood) and my own place that I can put shit wherever I want.
Anyways, on a turbo project I started gearing up for but cancelled I had a 71mm billet 6+6 compressor wheel reamed out to fit onto a Garrett gt35r turb wheel. The property I own has 2 large nat gas pipelines going through it and I'm tapped right in. I have an endless amount I can pull (still have to pay!) so I was thinking of building a turbine powered gen set.
I know it would be WAY easier and cheaper to just buy one, but I like a challenge, and I love to build. My eventual goal is to have it fully automatic with FADEC control. I have some friends that own a rather large custom machine shop that live about 3 miles from my house. They have several 5 axis mills, crazy lathes, and a machine I can't think of the name of, passes a current through a really really tiny wire to cut metal. Very precise and the cleanest cuts you'll ever see. They've already made several compressor wheels for diesel performance.
Wrapping this up, would the size wheels I have be eno ugh for say 30hp? I'd like to have a 20kw generator. I know natural gas has a very low power density, but I like knowing I'll never run out of fuel. Thanks for any thoughts/comments!
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