1 / 29

Lecture 6 – Solar Oven Kickoff

Engineering 102 . Lecture 6 – Solar Oven Kickoff. Administration. Midterm is almost graded – will hand back on Tuesday Energy Unit items have been graded except for Bloom box discussion posts Complete registration for Open Houses by 2/18, tomorrow iExpo is next week!

evette
Télécharger la présentation

Lecture 6 – Solar Oven Kickoff

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Engineering 102 Lecture 6 – Solar Oven Kickoff

  2. Administration • Midterm is almost graded – will hand back on Tuesday • Energy Unit items have been graded except for Bloom box discussion posts • Complete registration for Open Houses by 2/18, tomorrow • iExpo is next week! • Tuesday, February 22, 201110:00 am to 3:00 pmStudent Union, 3rd Floor Ballroom

  3. Administration • iExpo: Engineering Industry Career Fair • Have your resume with you • Business casual dress is appropriate • Go early for best swag selection

  4. Administration • Business Formal Attire • More appropriate for actual interviews

  5. Administration Personal expression is important, but realize that you are making a first impression that cannot be undone

  6. Administration Team Names! Team 1: Team Gila + Nick Team 2: Team Force Team 3: Engineering Excellence Team 4: TEAM BJANKL (bah-jane-kle) Team 5: * Team 6: * Team 7: Beast Mode Team 8: * * Team HW: Please email me with your team name!

  7. Today’s Agenda • Team Gila + Nick: Video presentation • Kick off the Solar Oven project • Discuss first Solar Oven HW (team HW)

  8. Solar Power in Arizona Take it away, Team Gila + Nick!

  9. Solar Oven Project • Solar Fact: the earth receives more energy in one hour than it uses in an entire year! • One of the Grand Challenges • Team Project with multiple steps • 3 basic types of Solar Cookers: • Box • Panel • Parabolic

  10. Solar Oven Project • Box Solar Cooker: • Box cookers cook at moderate to high temperatures and often accommodate multiple pots. Worldwide, they are the most widespread.

  11. Solar Oven Project • Panel Solar Cooker: • Panel cookers are simple and relatively inexpensive to buy or produce. Solar Cookers International's "CooKit" is the most widely used.

  12. Solar Oven Project • Parabolic Solar Cooker: • Curved concentrator cookers or "parabolics" • Cook fast at high temperatures, but • Require frequent adjustment and supervision for safe operation.

  13. Solar Oven Project • Our ENGR 102 Box Solar Cooker: An enclosed cardboard box with aluminum foil reflectors

  14. Solar Oven Project • Solar oven video Segments: • Solar cooking in impoverished countries: • http://www.youtube.com/watch?v=Ofn7jqPDTeY • A simple Pizza Box Solar Oven: • http://www.youtube.com/watch?v=b6mOT-hgqfQ

  15. Oven Construction Reflectors Window Make top of oven flat… NOT SLOPED Cooking tray Insulated Enclosure

  16. Energy • All cooking energy comes from sunlight • Concentrated by reflectors • Absorbed by dark interior surfaces • Radiation retained by window • Heat retained by insulation Make top of oven flat… NOT SLOPED

  17. The Basic Oven A double-wall insulated cardboard box with aluminum foil reflectors and a plastic window Reflector Window Inner box Insulation Outer box Make top of oven flat… NOT SLOPED

  18. First Construction Spec 1 reflector, 3 sizes 15 x 15 cm chamber with 8 cm front height Window 15 x 15 cm with 1 or 2 Mylar layers Outer box size limited by cardboard supply Loose or tight newspaper Angle set for test day Make top of oven flat… NOT SLOPED

  19. Oven Dimensions M L W Make top of oven flat… NOT SLOPED

  20. Solar Angles Solar Radiation Window Θs y β Make top of oven flat… NOT SLOPED

  21. Window Construction Power Density = IO Solar Radiation Window Transmittance =  Power Density = 2 IO

  22. Solar Oven Project: What we gain • Experience in: • Developing a performance prediction model • Converting data into design decisions • Analyzing design variables • Designing and building a device (twice!) • Testing a finished product (twice!) • Practice in: • Sustained teamwork • Maintaining engineering records • Appreciation for alternative sources of energy

  23. Solar Oven Project: The Basic Steps

  24. Solar Oven Project: Schedule • Oven construction and test schedule: • (dates subject to slight adjustment) • 2/17 (today!): Project starts • 2/28 – 3/4: pick up materials (Room 200) • 3/8: Test first oven design • 3/10: Dissect another team’s oven • 3/22 & 3/24: Team oral/ PowerPoint presentations • 8 minutes/team maximum • 5 - 8 slides • 4/1 (Friday): Test redesigned ovens – “SOTD!” • 4/7: Solar Oven written project report due

  25. Solar Oven Project: Deliverables • Interim homework items: • Solar Oven Comparisons (Team HW) – due 3/1 • Solar Oven Prediction Model (Team HW) – due 3/3 • Solar Oven for first test – 3/8 • Solar Oven for dissection – 3/10 • Team Oral Presentations - 3/22 & 3/24 • Second round Solar Oven for Throwdown – 4/1

  26. Solar Oven Project: Deliverables, cont. • Final written project report (Team), including • Design Spreadsheet • Oven schematic • Descriptions of the process • Evaluation of results • Discussion of theory • Working notes • References and Appendices • Final Report due on 4/7

  27. First Round Tasks • Read through Solar Oven document • Work through Solar Oven comparisons HW • Develop a prediction model for your optimally-designed oven • Build an oven according to your calculated specifications • Test your oven for maximum temperature • Compare to predicted maximum temperature

  28. First Round Tasks, cont. • Pass your oven to a designated team • Analyze the oven you receive from another team • Details of construction • Measurements and calculations

  29. Final Notes • Solar Oven Topics to be continued on Tuesday • For Tuesday, read Solar Oven document pp. 1-11, 28-29, and pp. 34-37 • Ignore reference to Design of Experiments (DOE) • Solar Oven Comparisons HW (team) within Solar Oven document, pp 28 – 29; due 3/1 • Designate team member to pick up your oven supplies the week of 2/28 • Teams without names: please email me with your name

More Related