Tracking the Sun 1

SLED Team John Grutzner –College of Science, Chemistry Alyssa Pantich –College of Engineering, Biomedical Engineering Kari Clase –College of Technology, Technology, Leadership and Innovation Nancy Tyrie –5 th Grade Teacher, Sunnyside Elementary Bryan Hubbard –College of Technology, Building Construction Management

Additional Team Support Members Melissa Colonis –Tecumseh Middle School, Math Specialist Julie Bell –Purdue, Science Specialist Connie Harris –Purdue SLED 3

General Overview Two lesson plans Lunch speakers from CMTA Engineering –Design zero energy schools and assist with integrating building systems into the curriculum Check the website for the most up to date lesson plans (modifications/clarifications are always being made) Open ended design activities 4

Solar Tracker A solar tracker is device that orients a solar panel toward the sun. Solar panel trackers are used to reduce the angle between the incoming light and a photovoltaic panel. This increases the amount of energy produced _tracker 5

ial/wp- content/uploads/2010/02/mil_sol ar_farm_nellis_afb_lg.jpg 6 Trackers are used on most large solar farms

Power Lost Due to Panel not Facing the Sun 15° 3.4% power lost 30° 13.4% power lost 45° 30% power lost _tracker 7

Discussion on sun position ry/illustrations/seasonal_sun/illus tration_sun.jpg 8

Reasons for the Seasons 9

Earth Rotation 10 ns/seasons_ecliptic.html

Direct versus Indirect 11

Direct versus Indirect 12

Direct versus Indirect 13

Sun Position Additional Activities Building earth/sun model Solar dance Shadow activities Phototropic plants 14

Sun/Earth Model 15

a_prodanovic/wp- content/uploads/2009/10/pic- 054.jpg 16 Solar Dance

Shadow Activity 17

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Components used by Engineers 20

Ball Bearings

Bearing Basics Things roll better than they slide. Rolling friction has less resistance that sliding friction. These balls or rollers bear the load.

Ball Bearings Most common type Very small contact point

ages/Illustrations/hip_repl.jpg UC Berkeley 25

Four Bar Linkage 26

27 Example of Mechanisms Lift platform Front loader Can crusher Hany A. Sherif, Qassim University Engineering-Qassim-University#

28 Example of Mechanisms Lift platform Microwave carrier to assist people on wheelchair Hany A. Sherif, Qassim University Engineering-Qassim-University#

29 Four-Bar Linkage

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