Heat Exchanger for oxidizer burner

[prmmel]

I need to develop an economical small preheat exchanger on the exhaust of a 1400F oxidizer/burner @ 300scfm inlet airflow expanded to ACFM @ 1400F.
I need to keep the DP low
I will run at 1400F inlet on the hot side and 150F inlet on the cold side.

Questions I have:
Is there a simple generic equation for determining efficiency based on basic transfer properties.
Best material for 1400F. I am thinking 309 or 409SS tubing.
My plan is not to do a plate and frame due to thermal expansion concerns, but rather a shell and tube design.

Any assistance is apppreciated.

 

[GHartmann]

I would suggest trying to find a vendor that specializes in these type heat exchangers. The mechanical design of any exchanger at these type of temperatures requires some pretty rigorous stress considerations.

Try these guys:

http://hpiheatexchange.com/transition_exchangers.php

Not sure what you had in mind about your efficiency but see the attached for some guidelines (these are based on large power plant type air preheaters.

 

[mjopp]

Anguil is another vendor that specializes in heat exchangers:

http://www.anguil.com/contact/submit-energy-recovery-project-specs.aspx