Factory provide nice price 3003 Aluminum Sheet to Los Angeles Factories
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3003 Aluminum Sheet
♦ Temper: H14, H16, H18, H22, H24, H26, O
♦ This series aluminum sheet is anticorrosive and its production technology is good.
♦ The main ingredient in it is manganese element and the content is between 1.0% and 1.5%.
3000 Aluminum Sheet Applications
As a result of its good property in anti-corrosion, this series aluminum sheet is commonly used in moist environments like air conditioners, refrigerators, at the bottom of cars, etc.
3000 series aluminum sheet is approx 20% stronger than the 1000 series, has great workability and may be deep drawn, spun, welded or brazed. The 3000series aluminum sheet is widely used for general purposes. The Alloy are including the AA3003, AA3004, AA3005, AA3102, AA3105, Temper O, H14, H18, H24, H26, H111, H112, F, From thickness 0.2mm-350mm, width 500mm-2300mm, length 500mm-110000mm. With Plain, five bar, stucco, diamond, or mirror surface process, Or coated with PE, PVDF, BRUSH etc. There is (CC) cold rolling and (DC) hot rolling Line.
3003 Aluminum Sheet Approx. 20% higher strength than the 1100 series, but retaining an excellent workability rating. May show some slight discoloration when anodized, but reacts well to mechanical and organic finishings. 3003 is easily welded and brazed, but solder is limited to the torch method. Like 1100, tends to be “gummy” when machined. Non-heat treatable.Typical applications include food and chemical equipment, appliance components, truck and trailer roofing, heat exchangers, and lawn furniture components.
As a China-based 3003 aluminum sheet manufacturer and supplier, we also produce coated aluminum coil, aluminum plate, aluminium slit coil, aluminum strip, anodising aluminum sheet, embossed aluminum sheet, etc. For more detailed information, please continue browsing our website or feel free to contact us directly.
This is a quick and short example. I have folded the two aluminum foil pieces together in such a way as to have some excess on one side. This excess will radiate the heat from the (front) surface into the circulating air column (at the back surface and area). It was cut about 1/4 to 1/2 inch wide and bent at about 45 degree alternating angles.
The aluminum foil I used was very thin, so if you can and use the aluminum foil construction, then use a thick aluminum foil if you can find it or some aluminum sheet metal. Why aluminum? Because it absorbs/conducts heat more easilly as compared to other metals. Perhaps the extensions or “radiators” can be spaced in rows 2 or 3 inches apart or less. Keep the back insulated side as close to the aluminum radiators as possible.
The front side of the collector can be painted flat black, not gloss black since you want it to absorb as much energy as possible instead of reflecting any.
Here is an article segment from Wikipedia.com:
In metals, thermal conductivity approximately tracks electrical conductivity according to the Wiedemann-Franz law, as freely moving valence electrons transfer not only electric current but also heat energy. However, the general correlation between electrical and thermal conductance does not hold for other materials, due to the increased importance of phonon carriers for heat in non-metals. As shown in the table below, highly electrically conductive silver is less thermally conductive than diamond, which is an electrical insulator.
Since diamond is a good thermal conductor, it is of no surprises that carbon (ie, what diamonds really are) has great thermal conductivity, in fact if you look it up (carbon nanotube thermal conductivity) you will see that it is even better than diamond.
The article can be found here:
Note that copper is noted as having much better heat conduction-transfer than aluminum, and silver is noted as having a much better heat conductivity than copper, but silver is more expensive. Silver can oxidize (near?) black on its own and might not need painting. Since usually any metal will be painted black, and with various construction designs of the heater, i’m not sure if you actually will need silver or copper for example as opposed to just plain aluminum or even (zinc coated) sheet steel. I also read that iron and steel are poor heat conductors as compared to the others metals mentioned. Perhaps some silver or copper plated sheet steel would be an improvement…anyone know?
I seen some reasonably sized thin aluminum baking containers at a “dollar-store” that might have use in a project like this.
If you can obtain aluminum coil/roll/plate stock, you can “weld/solder” radiator “tabs” all over the back surface with a prodoct I believe is called Alumaloy (a low melting aluminum aloy solder). These radiator tabs would be thin aluminum and maby copper if that alloy would bond the two without any problems (not sure yet).
Also, instead of using metals to absorb the heat, I’ts quite possible its not needed at all. Consider a greenhouse how warm/hot it can get. Imagine that many watts of heat for free to heat your house…perhaps the upper floor, and with the intake (which has some preheated air/recirculated) to the solar heater/greenhouse from the lower floor. Clear plastic material can be used as a windbreaker(s) and a black plastic or material for the absorber. This construction can be perhaps circular shaped, and it need not be that large or tall, just use a large surface area for the collector.
Some people who work around in a cold car garage with little or no heat might want to consider adding in some heat with a solar air heater. If you got the sunlight nearby, it’s possible.