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Posted by Green Xenon [Radium] on July 12, 2008, 3:58 pm
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
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Posted by Noon-Air on July 12, 2008, 4:12 pm
show/hide quoted text
> 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
How are you going to deal with the condensation and the resultant water
runoff??
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Posted by DIMwit on July 12, 2008, 6:36 pm
show/hide quoted text
>> 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
> How are you going to deal with the condensation and the resultant water
> runoff??
and what if the kids are already pole lickers? you'd need tongue defrosters.
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Posted by Green Xenon [Radium] on July 12, 2008, 11:27 pm
show/hide quoted text
> How are you going to deal with the condensation and the resultant water
> runoff??
I don't know, that's why I'm asking about this theoretical cooling
device in these NGs.
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Posted by Noon-Air on July 12, 2008, 11:51 pm
show/hide quoted text
>> How are you going to deal with the condensation and the resultant water
>> runoff??
> I don't know, that's why I'm asking about this theoretical cooling
> device in these NGs.
Thats fine, but please consider that if your theoritical cooling device
worked without having humidity and condensations problems, then everybody
would already have one. Think radient floor heat, and then what is gonna
happen if you try reverse it and cool the floor.....its gonna get real wet.
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> 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