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spacesailor

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Posts posted by spacesailor

  1. That doesn't work as PV etc, need to be on the correct side to maximize efficiency.

     

    which leaves three sides naked.

     

    "Here are some sample albedo values. The range of possible values is from zero (totally unreflective) to one (fully reflective).

     

    New asphalt, 0.04 - 0.05

     

    Aged asphalt, 0.1 - 0.12

     

    Bare soil, 0.17

     

    Deciduous trees, 0.15 - 0.18

     

    Green grass, 0.25

     

    Aged concrete, 0.2 - 0.3

     

    New concrete (traditional), 0.4 - 0.55

     

    New concrete with white portland cement, 0.7 - 0.8

     

    Water, 0.03 - 1.0

     

    Soil (Dark/Wet) 0.05

     

    Soil (Light/Grey) 0.4

     

    Sand 0.15 - 0.45

     

    galvanized steel - 0.24

     

    terra cota tile - 0.28

     

    tar & gravel - 0.33

     

    Notice that the good old terracotta tile has an higher albedo than trees, so the old areas of Sydney might be cooler than the the bush they replaced."

     

    This thread was about houses heating the air!

     

    Which includes whats on MY roof.

     

    spacesailor

     

     

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