Hybrid Car – More Fun with Less Gas

Anybody know where to get a small steam turbine? - Page 7

register ::  Login Password  :: Lost Password?
Posted by Curbie on March 31, 2009, 7:09 pm
 


Interesting little app.

Thanks

Curbie

Posted by Morris Dovey on March 31, 2009, 7:31 pm
 
Curbie wrote:


Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/

Posted by Curbie on March 31, 2009, 8:34 pm
 wrote:


aol! >= ???

Posted by Morris Dovey on March 31, 2009, 9:19 pm
 Curbie wrote:

Shorthand for "me too". Google aol+jargon for the story.

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/

Posted by Tim Jackson on March 26, 2009, 4:55 pm
 Morris Dovey wrote:

You can't make the tube a good absorber and a bad radiator as such, the
two are intimately linked by the laws of thermodynamics.  What you can
do is make the tube a good absorber/emitter of light and near infra-red,
and a bad absorber/emitter of far infrared.  Most materials are the
other way around. Conveniently, polished copper happens to have about as
a good a ratio as you get.  Polished, not varnished - all paints and oil
coatings emit infrared well unless extremely thin. But it needs
maintenance and won't run very hot without discolouring.
www.omega.com/literature/transactions/volume1/emissivitya.html

The hotter your target, the less the difference, as the peak radiation
frequency rises closer to that of the sun's photosphere (about 6000K).
Now if you could move to a white-dwarf star system....

Tim

This Thread
Bookmark this thread:
 
 
 
 
 
 
  •  
  • Subject
  • Author
  • Date
please rate this thread