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Cooling swimming pool in high temp - Page 4

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Posted by clare at snyder.on.ca on April 14, 2006, 8:56 pm
 
wrote:


Never hheard of low-E-squared" or Low-E-^2" glass? Not on both
surfaces, but limits emissivity in both directions.

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Posted by Solar Flare on April 14, 2006, 10:22 pm
 

Effectively the heat from the sun can enter the window but not get
back out due to the wavelength being changed.

The thermal radiation enters as one wavelength and is reradiated at a
different one that the Low E coating doesn't pass as well.



<clare at snyder.on.ca> wrote in message

transmission

coating

surface,


Posted by Duane C. Johnson on April 15, 2006, 2:35 am
 Hi Solar;


 > Effectively the heat from the sun can enter the
 > window but not get back out due to the wavelength
 > being changed.

The sun does not transmit "heat" to us.
Heat is mechanical motion of atoms and molecules.
There are nearly none of these in space.
The sun sends us light or more properly
electro-magnetic radiation. Not heat.

 > The thermal radiation enters as one wavelength

This is the problem there is no such thing as
"thermal radiation". There is infra red radiation
though.

Besides infra red radiation is only about 1/2 of the
power the sun delivers. The other half is visible
light.

 > and is reradiated at a different one that the
 > Low E coating doesn't pass as well.

Duane

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Posted by Solar Flare on April 15, 2006, 2:53 am
 The sun doesn't deliver anything. It doesn't even move closer to the
earth.

I prefer the plain infra radiation and it is never a form of power. It
is a form of energy.

Go back to sleep.

Please don't top post.



Posted by Duane C. Johnson on April 15, 2006, 12:56 pm
 Hi Solar;


 > The sun doesn't deliver anything.

Ok, poor choice of words. It does radiate
power to Earth though.

 > It doesn't even move closer to the earth.

Sure it does, well actually the Earth and Suns
distance does change throughout the year. We are
closest to the Sun about January 6th or so.

 > I prefer the plain infra radiation and it is
 > never a form of power. It is a form of energy.

Of course solar radiation is a form of power.
You can't store light to build up energy.

Solar energy is a misnomer.
Solar power can be collected and converted to
hear or other things that can be stored. However,
we can't tell where the power originated for
these stored energies.

 > Please don't top post.

I didn't and usually don't.
I mostly use imbedded posting style.

Duane

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     Home of the $5 Solar Tracker      Receiver
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