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Here Comes the Sun Environmental Tech III ARCH4225 Fall 2011 - Prof. Tango

Here Comes the Sun Environmental Tech III ARCH4225 Fall 2011 - Prof. Tango. Earth / Sun Applet. Understand the principles governing the relationship between the earth’s rotation, orbit and angle to the sun http://www.mesoscale.iastate.edu/agron206/animations/01_EarthSun.html

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Here Comes the Sun Environmental Tech III ARCH4225 Fall 2011 - Prof. Tango

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  1. Here Comes the Sun Environmental Tech III ARCH4225 Fall 2011 - Prof. Tango

  2. Earth / Sun Applet • Understand the principles governing the relationship between the earth’s rotation, orbit and angle to the sun http://www.mesoscale.iastate.edu/agron206/animations/01_EarthSun.html • Arctic circle 66.5 degrees north latitude • Tropic of Cancer = 23.5 degrees north • Tropic of Capricorn = 23.5 degrees south • Antarctic Circle = 66.5 degrees south latitude

  3. Winter Solstice Dec. 21 (Northern Hemisphere) Summer Solstice June. 21 (Northern Hemisphere)

  4. Changes in Latitude, Change in Altitude

  5. Sun Path Diagram For 32 degrees north latitude Solar Control and Shading Devices/Olgyay, pg 38

  6. Seven Rings for the months: June 21 - Summer Solstice July 21 / May 21 Aug. 21 / April 21 Sept. 21 / March 21- Equinox Oct. 21 / Feb. 21 Nov. 21 / Jan. 21 Dec. 21 - Winter Solstice Heliodon

  7. Sun Chart and Shadow Casting • straightedge • scale • protractor

  8. Readingthe Sun Path Diagram

  9. 9AM 1PM 5PM

  10. 9AM 1PM 5PM

  11. 9AM 1PM 5PM

  12. 9AM 1PM 5PM

  13. Solar Time • Solar time varies from clock time • Reasons: • Daylight Savings TimeTypically clocks are adjusted forward one hour near the start of spring (2nd Sunday in March/spring forward) and are adjusted backward in fall (1st Sunday in November/fall back) • Deviation in longitude • Earth’ s speed in it’s orbit around sun changes during the year 33 degrees North Latitude Feb. 11 (+14 minutes) Nov. 1 (- 16 minutes)

  14. World Time Zonesdirection of earth’s rotation ----- Standard time meridians are 15 degrees apart (one hour) or 4 minutes per degree -8 -7 -6 -5 hours GMT +2 +3 +4 hours U S A

  15. Solar Control and Shading Devices / Olgyay & Olgyay Bioclimatic Considerations, page 19-23 Shading Masks, page 44-49 Sun Path Diagrams, page 84-85 Overheated period charts, page 86-87 Vocabulary of Shading Devices, page 88-92 Architectural Examples (Case Studies), page 93-199 \\Fac_web\web\architecture\classes ARCH 4225 Fall 2011 Prof. Tango

  16. 7 – 8 week typical time lag between summer solstice and peak heat period. This is because of the gradual warming of the earth over the summer period June 21 – Summer Solstice

  17. Obstruction Masks • Moore – Concepts and Practice of Architectural Daylighting page 72 -78 • Olgyay - Solar Control and Shading Devices • pages 44-49 (Part II) Obstruction Mask Concept • pages 88-92 (Part III) Obstruction Mask Examples

  18. Obstruction Mask

  19. Olgyay page 45

  20. Olgyay page 45

  21. smiles and pies

  22. Concepts and Practice of Architectural Daylighting / Fuller Moore page 72 -78 Horizontal Shading Device @ 100% shading

  23. Concepts and Practice of Architectural Daylighting / Fuller Moore page 72 -78 Horizontal Shading Device @ 50% shading

  24. Concepts and Practice of Architectural Daylighting / Fuller Moore page 72 -78

  25. Shadow masks

  26. Moore: Concepts and Practice of Architectural Daylighting – page 74 - 75

  27. Daylight Factor • Footcandles • Model Testing

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