Hi:
I thinking of a cooling mechanism for houses and building in which the cooling -- in the direct sense -- involves only radiation and no convection at all. Sorta like a radiant-stove-top in reverse. Indirectly, however, some amount of convection and conduction will be needed [liquid nitrogen/helium, cold metals]. The cooling panels are on the ceiling and walls.
My visualization is that the radiant cooling panel contain extremely cold metallic coils [cooled by liquid nitrogen and/or helium], this would probably be deepest part of the panel.
Layer 1: a material that allows heat radiation to pass through but is a very poor conductor of heat Layer 2: the same material found on the very top of radiant stove tops Layer 3: this is the deepest part containing the cool metallic coils. Inside these coils are where the liquid nitrogen/helium would be flowing through]
Sorry is my visualization is vague, I myself am getting confused by it.
Can anyone think of a more efficient way for direct radiant cooling?
By direct radiant cooling, I mean that if you place your body at a noticeable distance from from panel, you'll feel cold because the extreme cold of the coil will draw IR radiation away from your body. OTOH, if you touch the panel, you won't feel as cold because the 1st layer of the panel is a very poor conductor of heat.
Thanks a bunch,
Radium