Sun Angles Impact the amount of Insolation Daylight Hours Seasonal Seasonal October – March...
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Transcript of Sun Angles Impact the amount of Insolation Daylight Hours Seasonal Seasonal October – March...
![Page 1: Sun Angles Impact the amount of Insolation Daylight Hours Seasonal Seasonal October – March October – March Low – SunLow – Sun April – September April.](https://reader035.fdocuments.us/reader035/viewer/2022072005/56649cd95503460f949a3615/html5/thumbnails/1.jpg)
Sun AnglesSun Angles
Impact the amount of Impact the amount of InsolationInsolation
Daylight HoursDaylight Hours SeasonalSeasonal October – MarchOctober – March
• Low – SunLow – Sun April – SeptemberApril – September
• High - SunHigh - Sun
Solar declinationSolar declination Latitude where sun is Latitude where sun is
directly overhead (90directly overhead (90°)°)• Sub Solar PointSub Solar Point
Zenith AngleZenith Angle Angle between 90° Angle between 90°
and sun at noonand sun at noon Sun AngleSun Angle
Angle of the sun Angle of the sun above the horizon at above the horizon at noonnoon
![Page 2: Sun Angles Impact the amount of Insolation Daylight Hours Seasonal Seasonal October – March October – March Low – SunLow – Sun April – September April.](https://reader035.fdocuments.us/reader035/viewer/2022072005/56649cd95503460f949a3615/html5/thumbnails/2.jpg)
Sun AnglesSun Angles
Zenith Angle + Sun Zenith Angle + Sun Angle = 90Angle = 90°°
SOSO What is Tuscaloosa’s What is Tuscaloosa’s
noon sun angle on noon sun angle on June 21June 21stst??
Let’s practiceLet’s practice
Step 1Step 1 Determine declination Determine declination
of sun for that dateof sun for that date
Step 2Step 2 Find noon sun angleFind noon sun angle
• Difference in Difference in °° between between location’s latitude and location’s latitude and SS point then subtract SS point then subtract from 90from 90
![Page 3: Sun Angles Impact the amount of Insolation Daylight Hours Seasonal Seasonal October – March October – March Low – SunLow – Sun April – September April.](https://reader035.fdocuments.us/reader035/viewer/2022072005/56649cd95503460f949a3615/html5/thumbnails/3.jpg)
The The AnalemmaAnalemma
![Page 4: Sun Angles Impact the amount of Insolation Daylight Hours Seasonal Seasonal October – March October – March Low – SunLow – Sun April – September April.](https://reader035.fdocuments.us/reader035/viewer/2022072005/56649cd95503460f949a3615/html5/thumbnails/4.jpg)
Daylight HoursDaylight Hours How does sun angle How does sun angle
impact the amount of impact the amount of daylight hours at daylight hours at different latitudes?different latitudes?
Online calculatorOnline calculator
![Page 5: Sun Angles Impact the amount of Insolation Daylight Hours Seasonal Seasonal October – March October – March Low – SunLow – Sun April – September April.](https://reader035.fdocuments.us/reader035/viewer/2022072005/56649cd95503460f949a3615/html5/thumbnails/5.jpg)
Solar IntensitySolar Intensity
Intensity = Sin (A)Intensity = Sin (A) Sin = sineSin = sine A = sun angleA = sun angle
90 = 100% efficiency90 = 100% efficiency 80 = 98%80 = 98%
45 = 71%45 = 71% 20 = 34%20 = 34%
![Page 6: Sun Angles Impact the amount of Insolation Daylight Hours Seasonal Seasonal October – March October – March Low – SunLow – Sun April – September April.](https://reader035.fdocuments.us/reader035/viewer/2022072005/56649cd95503460f949a3615/html5/thumbnails/6.jpg)
Run AppletRun Applet
![Page 7: Sun Angles Impact the amount of Insolation Daylight Hours Seasonal Seasonal October – March October – March Low – SunLow – Sun April – September April.](https://reader035.fdocuments.us/reader035/viewer/2022072005/56649cd95503460f949a3615/html5/thumbnails/7.jpg)
Insolation by LatitudeInsolation by Latitude
![Page 8: Sun Angles Impact the amount of Insolation Daylight Hours Seasonal Seasonal October – March October – March Low – SunLow – Sun April – September April.](https://reader035.fdocuments.us/reader035/viewer/2022072005/56649cd95503460f949a3615/html5/thumbnails/8.jpg)
NET RADIATIONNET RADIATION