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George, I don't really have a clue. Never though about it. The only advantage I can think of would be if it were a phase change refrigerant gas (which I think most of them are). When a liquid turns to a gas, it absorbs a tremendous amount of heat - but, no matter how you cut it all that heat has to eventually be picked up by the air. So my viewpoint is that there is no real advantage to it for our situation. The size of condenser you would need for the amount of heat we generate would probably be as large as the wing of your airplane {:>)
But, my first statement -- I don't have a clue-- is the most accurate one {:>)
Ed
----- Original Message ----- From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, November 13, 2007 5:44 PM
Subject: [FlyRotary] Re: Rebutal to the rebutal {:>) Thick vs Thin was : Diffuser Configuration Comparison
Ed,
What would be the problems of using refrigerant gas for cooling. I was thinking about this some time ago.
George ( down under)
Hi Blake,
Well, unfortunately we run into a thermodynamic limit in that the closer the air temperature gets to the coolant (actually the core metal) temperature, the less heat gets transferred from coolant to the air. But, if you can figure some way to refrigerate the air to about - 200F then we can really get rid of some heat {:>).
One of the things that makes this stuff so interesting (as well frustrating) is that we are trying to use simplified models of a very complex physical process to work with. I always say just remember that models are nothing more than dumbed-down version of the real world. Don't be surprised that they don't always give you the same answer.
I wish I had taken a course in Fluid dynamics at some point in my checkered career, but guess I'm sort of doing that now {:>).
Ed
----- Original Message ----- From: "Blake Lewis" <blake.lewis@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, November 13, 2007 2:03 PM
Subject: [FlyRotary] Re: Rebutal to the rebutal {:>) Thick vs Thin was : Diffuser Configuration Comparison
If we get an even better core, we can take a DeltaT of 300F.
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