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Qualitative Measure of Reflectivity

ME 340 Tyler Carr David Bilodeau. Qualitative Measure of Reflectivity. Purpose. Determine the best reflective surface for use in a solar cooker. The cooker is being designed by Engineers Without Borders as a low cost cooker for use in Peru. The Solar Cooker. Experimental Setup.

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Qualitative Measure of Reflectivity

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  1. ME 340 Tyler Carr David Bilodeau Qualitative Measure of Reflectivity

  2. Purpose • Determine the best reflective surface for use in a solar cooker. The cooker is being designed by Engineers Without Borders as a low cost cooker for use in Peru. The Solar Cooker ME 340 - Carr & Bilodeau

  3. Experimental Setup The different materials were mounted the exact same way on a testing surface and then placed in an insulated container. They were then placed 6 inches below a heat lamp . The surface temperature was then recorded at an exact time after the lamp was turned on (10 minutes). ME 340 - Carr & Bilodeau

  4. Assumptions • Convection is zero as a result of the walls on the bowls • The insulation is perfect using the insulated container so q’’net = 0 • α = ε, so the one with the lowest Ts has the highest reflectivity ME 340 - Carr & Bilodeau

  5. Results Because of the assumptions that were made, only qualitative conclusions can be achieved. The Mylar has the lowest surface temperature and therefore is the most reflective. However, since this was for a solar cooker, it was too difficult to attach the Mylar to the parabolic dishes. As a result, the tape with no writing will be used. ME 340 - Carr & Bilodeau

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