Reciprocating Expander

[LimaBerge]

I have a project where I wish to expand a refriderant vapor from 300 F and 300 psi to 200 psi and generate power from it. Should I be using a reciprocting expander to do this and where would I get one?

 

[pmover]

Turbo-machinery (turbo expander) are generally used for expansion processes for simplicity (smaller in size) and variation in process conditions.

Why do you consider a recip expander?

Good Luck!
-pmover

 

[LimaBerge]

I would consider any expander type but am having difficulty finding a small one in the 50 kW to 100 kW range that will operate at 300 F and 350 psi. This is an organic rankine cycle we are making for extracting heat from large engine exhausts. Any ideas?

 

[pmover]

ok, how about investigating:

http://www.mafi-trench.com/products/expandergenerator.html

50 kW - 500 kW turbo-gen sets

Good Luck!
-pmover

 

[TXiceman]

You might contact Howden Ltd in Glasgow, Scotland. They had done some work on using oil injected screws in expander service.

ken

Ken
KE5DFR

 

[dcasto]

in expanders it volume, volume, volume. Low volume expanders can be recip, high volume are cent.

 

[LimaBerge]

Does anyone know where I can get an expander that is in the under 500 kW range and low pressures and temps like 300 psi and 300 F?

 

[dcasto]

Texas Turbine, GE Rotoflow, LA Turbines, and Mafi-Trench will all design you one. They are hot commodities so a 26 week turn around would not be unreasonable, 20 week if lucky.

 

[dcasto]

I just remembered, where I worked in the 70's, the plant experimented with a off the shelf steam turbine running on gas. It was only 30% efficient versus a gas built one that was 80%.