exhaust driven turbo/generator
exhaust driven turbo/generator
(OP)
Ok, the idea has come up a few times
what about a motor/generator tied into a turbocharger?
generator for salvaging energy from the exhaust stream under normal operation
motor for spinning the turbine up quickly for quicker throttle response.
Can a unit be built now for a economical cost that would handle the RPMs and handle the power?

what about a motor/generator tied into a turbocharger?
generator for salvaging energy from the exhaust stream under normal operation
motor for spinning the turbine up quickly for quicker throttle response.
Can a unit be built now for a economical cost that would handle the RPMs and handle the power?

Jay Maechtlen





RE: exhaust driven turbo/generator
Hi Jay,
Did you see that thread, from which I quote a former post? The old first link don't work anymore, so I deleted it and found another one on which there's a photo of the thing. I don't have much time to search now, but I'm sure you'll find some more on the web. I read a week or two ago about another company about to market it, but I forgot the name.
Quote :
Garrett makes the Dynacharger, which is a turbocharger assisted with a small electric motor-generator. It allows electric turbocompounding in a way that power can flow from the turbocharger to load the battery or from the battery to the turbocharger for an improved transient response and low-end boost pressure.
A thing we'll probably see soon on production vehicles.
You can see it at :
http://popularmechanics.com/automotive/auto_technology/2001/8/blow_hard/index3.phtml
There's a lot of papers available on line about that. A few below:
http://www.turbodyne.com/10-25-99.html
http://www.osti.gov/hvt/deer2000/baileypa.pdf
http://www.osti.gov/hvt/deer2000/shahedab.pdf
http://www.turbodyne.com/10-25-99.html
Cheers,
Aorangi
RE: exhaust driven turbo/generator
I briefly worked on a turbo driven alternator 15 years ago, so there's no intrinsic problem with the speed.
There's no particular problem with the power, but a 15-40 hp alternator (rough guess) is a fair hunk of metal.
If you were going to do this seriously you'd probably want a more efficient turbine than the usual turbo. This sort of arrangement has (essentially) been used on ships - you end up using the IC engine as the HP stage in a multistage expansion system in effect, which is very efficient.
Cheers
Greg Locock
RE: exhaust driven turbo/generator
Cheers
Aorangi
RE: exhaust driven turbo/generator
Jay Maechtlen