lec17 - Design Tools Computer simulations Experimental...

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Unformatted text preview: Design Tools Computer simulations Experimental approaches Manual methods Simple Design Tools Manual methods ¡ simple geometries and sky conditions / / f(x) Daylight factor for sidelit rooms Daylight factor for rooflit rooms Window design Rooflight design S U B J E C T T Y P E Atria design Energetic behaviour daylight autonomy Shadow & reflection analysis sunshine duration Visual comfort A. Formulae & rules of thumb B. Tables C. Nomograms D. Diagrams E. Protractors Figure by MIT OCW. Simple Design Tools Manual methods ¡ Lumen method: E int = E ext x τ x CU ­ exterior illuminance ­ net transmittance ­ coefficients of utilization Æ interior illuminance 5 10 15 25 35 10 20 30 40 50 60 70 80 90 Solar altitude in degrees Illuminance in kilolux (multiply by 100 for approximate footcandles) Horizontal (half sky) Horizontal (full sky) Ceiling cavity 70 percent reflectance Room cavity 50 percent reflectance H D W Floor cavity 30 percent reflectance 10% D 30% D 50% D 70% D 90% D 1.00 0.90 0.800....
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This note was uploaded on 12/05/2009 for the course COA 4403 taught by Professor Test during the Spring '09 term at Georgia Tech.

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lec17 - Design Tools Computer simulations Experimental...

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