Download - Tracking the Sun
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Tracking the Sun
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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– 5th Grade Teacher, Sunnyside Elementary
• Bryan Hubbard– College of Technology, Building Construction
Management
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Additional Team Support Members
• Melissa Colonis– Tecumseh Middle School, Math Specialist
• Julie Bell– Purdue, Science Specialist
• Connie Harris– Purdue SLED
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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
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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
http://en.wikipedia.org/wiki/Solar_tracker
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http://www.justmeans.com/editorial/wp-content/uploads/2010/02/mil_solar_farm_nellis_afb_lg.jpg
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Trackers are used on most large solar farms
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Power Lost Due to Panel not Facing the Sun
• 15° 3.4% power lost
• 30° 13.4% power lost
• 45° 30% power lost
http://en.wikipedia.org/wiki/Solar_tracker
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Discussion on sun position
http://www.byexample.com/library/illustrations/seasonal_sun/illustration_sun.jpg
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Reasons for the Seasons
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Earth Rotation
10http://astro.unl.edu/naap/motion1/animations/seasons_ecliptic.html
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Direct versus Indirect
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Direct versus Indirect
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Direct versus Indirect
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Sun Position Additional Activities
• Building earth/sun model
• Solar dance
• Shadow activities
• Phototropic plants
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Sun/Earth Model
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http://cosmicdiary.org/blogs/tijana_prodanovic/wp-content/uploads/2009/10/pic-054.jpg
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Solar Dance
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Shadow Activity
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• http://www.flickr.com/photos/jakeperks/2441258936/
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Components used by Engineers
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Ball Bearings
http://static.ddmcdn.com/gif/how-to-maintain-a-skateboard-1.jpghttp://skateboarding-tricks-01.webs.com/skateboarding-tricks.jpg
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Bearing Basics
• Things roll better than they slide.
• Rolling friction has less resistance that sliding friction.
• These balls or rollers “bear” the load.
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Ball Bearings
• Most common type
• Very small contact point
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http://www.mdguidelines.com/images/Illustrations/hip_repl.jpg
UC Berkeley 25
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Four Bar Linkage
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Example of Mechanisms
Lift platform
Front loader
Can crusher
Hany A. Sherif, Qassim University http://www.docstoc.com/docs/74748705/introduction-College-of-Engineering-Qassim-University#
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Example of Mechanisms
Lift platform
Microwave carrier to assist people on wheelchair
Hany A. Sherif, Qassim University http://www.docstoc.com/docs/74748705/introduction-College-of-Engineering-Qassim-University#
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Four-Bar Linkage
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http://www.google.com/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=1&ved=0CDcQFjAA&url=http%3A%2F%2Fmysite.cherokee.k12.ga.us%2Fpersonal%2Fcharles_wilson%2Fsite%2FSuspension%2520steering%2520power%2520points%2F1%2FAutomotive%2520Wheel%2520Bearings.ppt&ei=_JIIT4X6Aebo0QGG683ZDg&usg=AFQjCNEdrQKDRqYXUMtQJS-3BGuqzNfd7w