1 / 8

Lecture 8 – Even More Solar Oven

Engineering 102 . Lecture 8 – Even More Solar Oven. Administration. Solar Oven Comparisons Team HW due Dec 14 (pg . 29, Solar Oven Document) Solar Oven Excel Prediction Model Team HW due Dec. 16 ( pp. 30-33, Solar Oven Document)

orsin
Download Presentation

Lecture 8 – Even More Solar Oven

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 8 – Even More Solar Oven

  2. Administration • Solar Oven Comparisons Team HW due Dec 14 (pg. 29, Solar Oven Document) • Solar Oven Excel Prediction Model Team HW due Dec. 16 (pp. 30-33, Solar Oven Document) • Excel Spreadsheets: enter angles (trig. functions) in radians, not degrees • First oven testing: Friday, Jan 6

  3. Today’s Agenda • Solar Oven Project • Emphasis on the gain, G, from the addition of the reflectors • Video • Team Time

  4. G: The Gain from Reflectors • See pp. 13 – 20 in Solar Oven Document • Remember our VIF* from the last lecture: * Very Important Formula IoAwt a G UwAw + UsbAsb T = Toven – Tambient= The Gain from reflector(s)

  5. G: The Gain from Reflectors Modeling the Gain, G: Figure 3. Solar Oven Geometry with Reflectors

  6. G: The Gain from Reflectors Where: N = the number of reflectors r = the reflectivity of the aluminum foil on the reflectors (see Table 3, page 13) M = the length of the reflectors L = the length of the oven window α = the angle by which light from the reflectors enters the window (when the window is normal to solar radiation) Equation 28, page 17

  7. G: The Gain from Reflectors Solving for α, we can obtain the more useful lid angle, Ω: Table 4. Reflector Settings for an Oven with Θs + β = 90

  8. Solar Oven Resource Dr. Tharp’s video from Fall, 2010: http://www2.engr.arizona.edu/~tharp/102/index.html • Excellent overview of solar oven modeling and equations • Use Internet Explorer – does not work in Firefox

More Related