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

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

6. Changes in Latitude, Change in Altitude

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

9. Heliodon 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

10. Sun Chart and Shadow Casting straightedge scale protractor

11. Reading the Sun Path Diagram

16. 9AM 1PM 5PM

17. 9AM 1PM 5PM

18. 9AM 1PM 5PM

19. 9AM 1PM 5PM

23. Solar Time Solar time varies from clock time Reasons: 1.Daylight Savings Time Typically 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) 2.Deviation in longitude 3.Earth’ s speed in it’s orbit around sun changes during the year Feb. 11 (+14 minutes) Nov. 1 (- 16 minutes) 33 degrees North Latitude

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

25. 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\\Fac_web\web\architecture\classes ARCH 4225 Fall 2011 Prof. Tango

26. 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

27. 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

29. Obstruction Mask

31. Olgyay page 45

33. smiles and pies

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

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

40. Shadow masks

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

47. Daylight Factor Footcandles Model Testing

53. Custom model solar alignment to 4PM on December 21 using sun dial chart. Photometric data being recorded for graphic analysis by 4th year students Landon Ray, Sudha Somayajula and Kellen Spafford.

54. Tuesday Sept. 6, 2011 Tuesday Sept. 6. Daylighting / Shading Exercises, Test Review. Thursday Sept. 8. Day/Sim Demo. Tuesday Sept. 13 GlassBuild Field Trip Thursday Sept. 15 Test 1: Shading / Daylighting Tuesday Sept. 20 Daylighting Project Work Day Thursday Sept. 22 Daylighting Project Due

55. Shading Exercises

71. Test 1 Study Outline Environmental Tech III - Prof. Tango Thursday Sept. 15 4-6:15 Solar Pattern Azimuth Altitude Tropic of Cancer/Capricorn Arctic Circle Tilt of earth Sunpath diagrams Solar time vs. actual time DST Longitude Orbit Solar year vs. thermal year Overheated period Underheated period Comfort Zone Creating a sunpath/temperature chart Shadow Masks Smiles and Pies Creating a shadow mask Daylighting Daylight Factor Footcandles