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Reciprocating Expander

Reciprocating Expander

Reciprocating Expander

(OP)
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?

RE: Reciprocating Expander

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

RE: Reciprocating Expander

(OP)
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?

RE: Reciprocating Expander

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

ken

Ken
KE5DFR

RE: Reciprocating Expander

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

RE: Reciprocating Expander

(OP)
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?

RE: Reciprocating Expander

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.

RE: Reciprocating Expander

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%.

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