I thinking of a radiant cooling device for houses and buildings in
which the cooling -- in the direct sense -- involves only radiation.
Sort of like a glass-ceramic radiant-stove-top in reverse. Indirectly,
however, some amount of convection and conduction will be needed
[liquid nitrogen, cold metals]. The cooling panel is the ceiling and
cools objects below it.
Quote from http://en.wikipedia.org/wiki/Glass-ceramic
"A glass-ceramic stove uses radiant heating coils as the heating
elements. The surface of the glass-ceramic cooktop above the burner
heats up, but the adjacent surface remains cool because of the low
heat conduction coefficient of the material."
Here is an example of a radiant stovetop switched on:
My theoretical glass-ceramic radiant cooler is similar to the infrared
radiant stovetop described in the wikipedia link, except:
1. It faces downward
2. The coils are hollow [as opposed to being solid all the way
through], this hollow within the coils allows liquid nitrogen to flow
through them can cool them down to near absolute zero
3. Liquid nitrogen -- not electricity -- flows through the coils.
4. Obviously, the coils get cold instead of hot.
The radiant cooling panel is on the ceiling of the room it is supposed
to cool. Those standing under it will feel cold.
Yes, heat absorbed into the radiant cooling panels is carried off
using convection and conduction -- but this is not what the subject
inside the room feels. The direct cooling effect on anything/anyone
inside the room is radiant.
By direct radiant cooling, I mean that if you place your body at a
noticeable distance from panel, you'll feel cold because the extreme
cold of the coil will draw IR radiation away from your body.
I’m thinking of more intense versions of this hypothetical glass
ceramic radiant infrared cooler to be used in refrigerators and
This radiant cooling is something that I am deeply interested in. I
don't know why.
Radiant cooling will feel to the object like "cold rays" just like
radiant heating feels like "heat rays".
I know there is no such thing as "cold rays", it's simply heat
radiating from my body to a colder object. My body is giving of heat
rays causing it's temperature to lower, thereby giving me a perception
Thanks a bunch,
How much energy is expended to produce the liquid N2??
How are you going to deal with the condensate?? Remember that 90% of air
conditioning is humidity control.