I went to my local glass shop and asked for low E glass as i heard i read i should use this type of glass to stop heat going through. but the shop guy said i need 2 layers of this glass and not one. can anyone please confirm this or is he just trying to sell more to me than i need?
No he's right
The only way to "absorb" the heat so that it doesn't go through is to have an empty space between two layers of glass taht will act as a green house and trap the heat. More efficient low-e glass has gas instead of only the empty space. Good quality low-e glass can be pretty expensive, but more important, it's not that easy to find and buy.
Unless your system puts out a crazy amount of heat, I suggest a cheap and efficient fan.
Tommy
The only way to "absorb" the heat so that it doesn't go through is to have an empty space between two layers of glass taht will act as a green house and trap the heat. More efficient low-e glass has gas instead of only the empty space. Good quality low-e glass can be pretty expensive, but more important, it's not that easy to find and buy.
Unless your system puts out a crazy amount of heat, I suggest a cheap and efficient fan.
Tommy
Low E glass is infact two layers with an inert gas such as argon filled in between...typical applications are windows especially in northern climates where insulation is critical....a fan or peltier seems to be the easiest and most economical way to go
Cheers!!The DIRT®
Cheers!!The DIRT®
Why a Peltier???
I don't understand why I keep seeing people wanting to use a TEC/Peltier unit. It's basically a solid state heat pump, but it's primarily designed for direct contact cooling. That's why you'll find it used so much in hardcore CPU cooling rigs. The "cold" side of the Peltier unit would sit on top of the processor and the "hot" side goes against a heat sink or water cooling system. Since Peltiers run so hot, though, they need more active cooling methods (higher speed fan, copper and/or larger heat sinks) to bleed off the excess heat it generates. I fail to see how a contact cooling unit could help out in a DIY projector.
Now maybe, just maybe, I could see a large Peltier from a portable electric refrigerator being installed in conjunction with a fan to cool a self-contained bulb section of a projector, but I'd worry too much about condensation and amount of current drawn by the device. Not to mention the cost, unless you happen to have a TEC refrigerator or cooler you'd like to completely disassemble.
I don't understand why I keep seeing people wanting to use a TEC/Peltier unit. It's basically a solid state heat pump, but it's primarily designed for direct contact cooling. That's why you'll find it used so much in hardcore CPU cooling rigs. The "cold" side of the Peltier unit would sit on top of the processor and the "hot" side goes against a heat sink or water cooling system. Since Peltiers run so hot, though, they need more active cooling methods (higher speed fan, copper and/or larger heat sinks) to bleed off the excess heat it generates. I fail to see how a contact cooling unit could help out in a DIY projector.
Now maybe, just maybe, I could see a large Peltier from a portable electric refrigerator being installed in conjunction with a fan to cool a self-contained bulb section of a projector, but I'd worry too much about condensation and amount of current drawn by the device. Not to mention the cost, unless you happen to have a TEC refrigerator or cooler you'd like to completely disassemble.
i have low-E glass in all the windows in my house
it does not block all the heat, it still gets pretty hot sitting beside a window in the middle of summer.
it does not block all the heat, it still gets pretty hot sitting beside a window in the middle of summer.
if i'm not mistaken, low-e glass only resists transmission of radiant heat, correct? not conducted or convected heat. i.e. hot air on one side of the glass is eventually going to convect-conduct-convect to the other side.
although it is true that the motionless gas inside the sandwich will also inhibit internal convection. not totally though. plus there will probably be thermal conductive bridges around the frame of the glass.
i could be wrong though...it's been a while since i learned about low-e material.
/andrew
although it is true that the motionless gas inside the sandwich will also inhibit internal convection. not totally though. plus there will probably be thermal conductive bridges around the frame of the glass.
i could be wrong though...it's been a while since i learned about low-e material.
/andrew
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