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Why do they paint the inside of Solar heat Collectors black?

Is there any possibility that they do that because the color black is the best color for infrared heat absorption?

If that is true, and we have expanded the square miles of black asphalt paved driveways, parking lots, roadways, and highways by 100 fold in the last 50 years, is there any wonder that the Earth is getting warmer (Global Warming)?

Have you noticed that the major color of industrial and residential roofing is black? Hmm-m...That might be okay during the winter

season, but do you think that it is helpful in the summer when it is hot?

I would be most interested in your ideas on this subject.

5 Antworten

Relevanz
  • vor 1 Jahrzehnt
    Beste Antwort

    "man" is not responsible for global warming. global warming is a way for greedy man to make money off of ignorant masses of people. I don't mean that in a disrespectful overtone, but it is silly to blame mankind for melting polar ice caps..seriously....they have been melting long before the "industrial boom" ever came about. It makes about as much sense as blaming cavemen's camp fires on global warming......climate has always changed....always will.....

  • vor 1 Jahrzehnt

    The more important question is why there are not pipes under the asphalt collecting the heat to be used as an alternate form of solar energy. Thus ending the need to burn some of the fuel that makes CO2 and putting the heat to work, not adding it to the air temp! Asking questions like this give you a insight into government. Oh, how do you know there is (Global Warming) and not just a change in climate that happens from time to time. Remember there was no Tech. in the last Ice age or the last heat wave long ago.

    Oh, my roof is painted with heat reflective coating, it helps keep the electric bill down here in Florida where AC is in use alot. A solor AC would be nice.

  • vor 1 Jahrzehnt

    Look up the word, "albedo."

    I can confirm what the other guy said. The idea that we can significantly decrease the Earth's albedo by painting rooftops white is already circulating in the world, and it's starting to gain some credibility.

    To Nadman,

    You are forgetting about the greenhouse effect. A white roof reflects significant radiation back into space. The extra radiation that is absorbed by a black roof makes the roof hot, but what happens next? The roof re-radiates some of that energy, but at longer wavelengths---wavelengths that are trapped by greenhouse gasses. Also, it does not re-radiate ALL of the energy that it absorbs. A lot of the heat of a black roof or a black road is transferred to the air.

  • Anonym
    vor 1 Jahrzehnt

    well,as you said black colour really does heat up things fast but i think that you have forgot that it also cools down fast.and i dont think so that black roads and parking lots might contribute to global warming because their area is very small when compared to that of the earth

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  • vor 4 Jahren

    photograph voltaic water heater involves of vacuum tube,water storage tank,helps and different fittings.photograph voltaic is absorbed by using the selective absorbing coating on the outer section of the interior tube while solar is on the vacuum tube and switched over to warmth capability, ultimately warmth capability is conveyed to warmth water interior the interior tube. The density of water shrink with the transforming into of water temperature, and then form convection of the water interior the tank, making water temperature upward thrust interior the water tank.

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