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Sky Conditions & Precipitation

Sky Conditions & Precipitation. As the sun moves it encounters sky conditions that intensify or obscure it. Clouds Direct and Diffuse Solar Radiation Precipitation. Clouds. Not only block sunlight for a building, they diffuse it Changes distribution of incoming light in a space Clear

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Sky Conditions & Precipitation

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  1. Sky Conditions & Precipitation

  2. As the sun moves it encounters sky conditions that intensify or obscure it. • Clouds • Direct and Diffuse Solar Radiation • Precipitation

  3. Clouds • Not only block sunlight for a building, they diffuse it • Changes distribution of incoming light in a space • Clear • Uniform • Overcast (typically used for design criteria, near the equator uniform may be better)

  4. Solar Radiation • Sun’s intensity often called “insolation” (INcidentSOLarradiATION) • Direct radiation • Diffuse radiation • Cloudy sky reduces direct beam radiation but increases diffuse sky radiation

  5. Solar Radiation • Directly heats the building, also creates hotter weather and affects humidity

  6. Precipitation • Rain and snow • Thermal comfort • Daylighting • Solar power • Rainwater harvesting • Structure of the building

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