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

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Presentation transcript:

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

Many Solar Cookers

Creative Solutions Mobile Picnic-Cooker Cooker from windshield-cover

Whats missing?

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

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)

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

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

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

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

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

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

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

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

Whole Model

Side View

Front View

Final Model

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

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)

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

Dimensions Construction started What is it capable of?

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

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

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 W

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 = W Max. Cooking power = 165+ W And: 3 h tracking free better heat storage

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...

Thank You For Your Attention