Installing a Turbo Expander (11MW) with Generator

Check with Brooklyn Union Gas or Google that along with Turbo Expander. They were doing work on this back in the early 70's when I went over to see the work that was being done. They were expanding the gas down from the high pressure transmission to the street mains.

They were not up at 11MW but Siemens or Nuovo Pignone (see GE-Nuovo Pignone) might be up in that range. You would probably want to look at 3-50% units as a possibility.

So the idea is doable !!! No reason then for being afraid of the turbo-expander outlet temperature well be too low, because in a general way, the kind of power generation is used in low process temperature (when we have a geothermal or any source of heat to vaporize the fluid), I mean it's used in closed cycle process, never heard of such open cycle power generation.

http://www.turboexpanders.com/cm/Home.html

Try the above link and go to "Products" and then "New Expanders".

It may have been in the mid 80's that I was over there. They actually were using air lubricated bearings to balance the expander wheels prior to installing. They were small diameter and I really don't know what HP or KW they could achieve. There's been a lot of work done since then.

Yes, but as you can see, they are using it in closed cycle process, by vaporizing the gas with geothermal energy or waste heat recovery, pumping it, condensate it with a cool source, and then expand it in the turbine (see Expander-Generator paragraph), for my case the idea is to recover expansion energy in OPEN CYCLE without using any kind of closed cycle process

try LINDE, our seperation system have HP and LP expanders directly coupled to the generators.

Hi all

Any one knows where i can get the (T;s) diagram for natural gas, all what I found on the net is the water (T;s) diagram ??????

I still have my copy of "Engineering Data Book" from the Natural Gas Processors Suppliers Association from 1966 distributed by Dresser Clark Division of Dresser Industries. The NGPSA was in Tulsa, OK. Try finding them.

Since Natural Gas is a mixture of hydrocarbon gases you will need to know the specific gravity of the "natural" gas you're specifically dealing with.

If you can't find a copy I might be able to scan a specific page or 2 if you let me know exactly what you're looking for and the SG of the gas you're dealing with.

http://www.gasprocessors.com/gpsa_book.html#order

See thread for ordering the latest Edition. Mine is 8th edition.

i would advice you to approuch GE,

GE acquired Nuovo Pignone and is a good candidate. Also look into Dresser-Rand ( the old Clark Compressor Group) along with Ingersoll-Rand, Siemens and Sulzer as possibilities.