High temperatures refrigerant

[sharond@its-eng]

Hi guys, I'm looking for a refrigerant that works 40C-200C safely, in relatively low pressures.

Thanks-
Sharon

[Brian_UK]

That appears to be some cooling load expected.

What it the application ?

[US Iceman]

Looks like something for an organic Rankine power cycle.

[sharond@its-eng]

That appears to be some cooling load expected.

What it the application ?

I'm building a "heat machine" based on Carnot-Rankin cycle in order to produce mechanical power out of heat source at very high temperature. The power required is not so high

[monkey spanners]

R718 water?

[sharond@its-eng]

R718 water?

For water I'l need a vaccum chamber of 0.1Bar for reaching 50C
I dont know the details for R718

[US Iceman]

Have you investigated this yet?

http://www51.honeywell.com/sm/chemic...2/organic.html

[Brian_UK]

R718 is water.

[sharond@its-eng]

Thanks bery much!
That excactly what I needed.
Your an angle

[mizun]

You dont need high heat to develop mechanical power. Our HIMM-The Cool Energy ORC turbines work on R245fa gas at 120C/10Bar and develops power.