1. A New Solar Cooker Concept: Remy & Francis Modelling & Simulation: Jonas Realization: Remy & Jonas

2. Many Solar Cookers

3. Creative Solutions Mobile Picnic-Cooker Cooker from windshield-cover

4. Whats missing?

5. The New Idea Sun from above 2x sun from below Big mirrors to avoid tracking Convection working for us (Heat goes up) Less glass to pass through

6. We Want More Energy / Higher Temperature (box) More Energy / Higher Temperature (box) Less Tracking (3 hour tracking-free) Less Tracking (3 hour tracking-free) Eye Safety (only 1.6 times sun concentration) Eye Safety (only 1.6 times sun concentration) Robustness (long-lasting material) Robustness (long-lasting material)

7. The Mirrors – Daytracking 9 am 12 am Height Cooker size Mirror size Tracking-free time 3 hours

8. The Mirrors – Seasonal Tracking Winter, sun at 60 degreesSummer, sun at 90 degrees Mirror-width Angle between mirrors Maximum angles for summer & winter

9. Simulating Sun & Mirrors Loss = Cosinus of hitting angle Loss = Cosinus of hitting angle Hitting angle = sun angle + 2x mirror angle Hitting angle = sun angle + 2x mirror angle Winter: 12% loss through angle Winter: 12% loss through angle Situation in Winter

10. Simulating Sun & Mirrors Loss = Cosinus of hitting angle Loss = Cosinus of hitting angle Hitting angle = sun angle + 2x mirror angle Hitting angle = sun angle + 2x mirror angle Summer: 43% loss through angle Summer: 43% loss through angle Support mirror Support mirror Situation in Summer

11. The Mirrors - Construction Moveable sideways for daytracking Adjustable angle for summer/winter Room for cooking stand

12. The Mirrors - Construction Material: Aluminium 2 mm, rivets, silicon, glass-mirrors, wheels Tools: Saw, riveter, file, silicon-pistol, drill

13. The Cooker No interference with the mirrors and the tracking No Shadows Good thermal properties

14. The Cooker No interference with the mirrors and the tracking No Shadows Good thermal properties

15. Whole Model

16. Side View

17. Front View

18. Final Model

19. Thoughts On The Cooker Several concepts: Mirror/mirrors on top Absorbing walls inside Opening mechanism Different fixation Glass cage on bottom Mirror(s) on bottom No Absorber

20. Thoughts On The Cooker Frame with insulated absorber Protective aluminium- cage on the outside Insulation inside (white/silver) Mirror on the bottom Glass cage with mirrors on the bottom (not shown)

21. Thoughts On The Cooker Absorber completely insulated Double-glass top with air and insulation

22. Dimensions Construction started What is it capable of?

23. Cooking Power Cooking Power = Absorption of the sun on the cooking plate. Depends on: Absorption of the cooking plate Reflectivity of the mirrors Intensity of the sun Loss through angles Reflection of the glass

24. Power from above Cooking Power = Power from above + power from mirror 1 + power from mirror 2 Power from above = sun intensity * cooker size * glass reflectivity * absorption efficiency Power from above = 800 W * 0.1 sqm * 0.9 * 0.9 = 65 W Reflectivity of double glass Size of the cooker Sun intensity per sqm Absorption efficiency

25. Power from mirror Power from mirror = sun intensity * cooker size * mirror reflectivity * cos(sun angle + 2*mirror angle) * glass reflectivity * absorption efficiency Power from mirror = 60 W * cos (angle) Cosinus(angle) between 0.5 and 0.9 Power from both mirrors approximately 65-100 W

26. Comparison with Box Cooker Box Cooker: Power from above = 65 W Power from mirror < 55 W Max. Cooking power = 120 W New Cooker: Power from above = 65 W Power from Mirrors = 65-100+ W Max. Cooking power = 165+ W And: 3 h tracking free better heat storage

27. Conclusion Cooker is under construction (outside!) Cooker is under construction (outside!) Expected cooking-power around 125 W Expected cooking-power around 125 W Tests will soon be made.. Tests will soon be made.. Hopefully you can all come and eat with us. Hopefully you can all come and eat with us. Thanks Remy for the new creative concept and the possibility to work on it and Tency and the CSR for the opportunity to conduct this project and to present it. And of course... Thanks Remy for the new creative concept and the possibility to work on it and Tency and the CSR for the opportunity to conduct this project and to present it. And of course...

28. Thank You For Your Attention