Piece Black
Piece Black
What is the highest temperature of 1 piece of square feet of floor painted black copper may reach the sunlight.
1 square foot of copper 1 / 16 inch thick in direct sunlight can reach painted Matte Black that the temperature is higher than temporary and what can be expressed in watts?
It depends on the distance between the Sun is. It also depends on what happens on the other side plate. Suppose you're in a sunny location in the tropics, on top of a mountain (even without clouds, the sun said, in a bell glass with air pumped transpaent and sat on a brick superinsulating. In this case, it receives about 1,200 watts per square meter of light absorbed and radiated into a hemisphere to a bottom temperature of about 4K. (This is not the best I could do it, could put the bell glass at the bottom of a long tube and hot, for example, square or sitting on top of a blast furnace – I suppose you have an idea of the temperature maximum through the exchange of radiation with a near natural environment). So look: http://www.powerfromthesun.net/Chapter6/Chapter6.htm # 6.1.1%% 20Absorber 20Plate decide if your black paint will be good or bad Emmitt IR (you can obtain the absorbance values of about 0.95, but high or emmissivity, absorbency emmissivity slightly lower low in the infra-red) Once you have the solar absorption factor emmissivity weighted (http://www.alibaba.com/product-gs/202724506/Solar_Collector_flat_plate_heat_pipe_.html gives figures Very Good) to work what is the temperature absolute radiate 1200 watts * 4K absorptivity of a body with low emmissivity – using absorb 90% and 10% I made about 660K (about 390C). Edit: the temperature can not be expressed in watts. Want to know what the temperature of your plate should be irradiated to 1080 watts per m ^ 2 at a low temperature blackbody.
Business Black History and Black History Month begins Monday, and in honor of the occasion, cover story today looks on some of the Bay Area and distinguished former Black-owned businesses. Read stories brand Hildebrand Reid, Marcus Books and the Continental Club to begin …
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