a new solar cooker concept: remy & francis modelling & simulation: jonas realization: remy...
TRANSCRIPT
A New Solar CookerA New Solar Cooker
Concept: Remy & Francis
Modelling & Simulation: Jonas
Realization: Remy & Jonas
Many Solar CookersMany Solar Cookers
Creative SolutionsCreative Solutions
Mobile Picnic-CookerCooker from windshield-cover
Whats missing?Whats missing?
The New IdeaThe 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 WantWe Want
More Energy / More Energy / Higher Higher Temperature (box)Temperature (box)
Less Tracking (3 Less Tracking (3 hour tracking-free)hour tracking-free)
Eye Safety (only 1.6 Eye Safety (only 1.6 times sun times sun concentration)concentration)
Robustness (long-Robustness (long-lasting material)lasting material)
The Mirrors – The Mirrors – DaytrackingDaytracking
9 am 12 am
• Height• Cooker size• Mirror size
Tracking-free time
3 hours
The Mirrors – Seasonal The Mirrors – Seasonal TrackingTracking
Winter, sun at 60 degrees Summer, sun at 90 degrees
• Mirror-width• Angle between mirrors• Maximum angles for summer & winter
Simulating Sun & Simulating Sun & MirrorsMirrors
Loss = Cosinus Loss = Cosinus of hitting angleof hitting angle
Hitting angle = Hitting angle = sun angle + 2x sun angle + 2x mirror anglemirror angle
Winter: 12% Winter: 12% loss through loss through angleangle
Situation in Winter
Simulating Sun & Simulating Sun & MirrorsMirrors
Loss = Cosinus Loss = Cosinus of hitting angleof hitting angle
Hitting angle = Hitting angle = sun angle + 2x sun angle + 2x mirror anglemirror angle
Summer: 43% Summer: 43% loss loss through through angleangle
Support mirrorSupport mirror
Situation in Summer
The Mirrors - The Mirrors - ConstructionConstruction
• Moveable sideways for daytracking
• Adjustable angle for summer/winter
• Room for cooking stand
The Mirrors - The Mirrors - ConstructionConstruction
Material: Aluminium 2 mm, rivets, silicon, glass-mirrors, wheels
Tools: Saw, riveter, file, silicon-pistol, drill
The CookerThe Cooker
• No interference with the mirrors and the tracking
• No Shadows
• Good thermal properties
The CookerThe Cooker
• No interference with the mirrors and the tracking• No Shadows• Good thermal properties
Whole ModelWhole Model
Final ModelFinal Model
Thoughts On The CookerThoughts 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 CookerThoughts 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 CookerThoughts On The Cooker
Absorber completely insulated
Double-glass top with air and insulation
DimensionsDimensions
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 65-100 W
Comparison with Box Cooker
Box Cooker:
Power from above = 65 WPower from mirror < 55 W
Max. Cooking power = 120 W
New Cooker:
Power from above = 65 WPower from Mirrors = 65-100+ W
Max. Cooking power = 165+ W
And: • 3 h tracking free• better heat storage
ConclusionConclusion
Cooker is under construction Cooker is under construction (outside!)(outside!)
Expected cooking-power around Expected cooking-power around 125 125 WW
Tests will soon be made..Tests will soon be made.. Hopefully you can all come and eat Hopefully you can all come and eat
with us.with us. Thanks Remy for the new creative Thanks Remy for the new creative
concept and the possibility to work concept and the possibility to work on it and Tency and the CSR for the on it and Tency and the CSR for the opportunity to conduct this project opportunity to conduct this project and to present it. And of course...and to present it. And of course...
Thank You For Your Thank You For Your AttentionAttention
Thank You For Your Thank You For Your AttentionAttention
Thank You For Your Thank You For Your AttentionAttention
Thank You For Your Thank You For Your AttentionAttention
Thank You For Your Thank You For Your AttentionAttention
Thank You For Your Thank You For Your AttentionAttention
Thank You For Your Thank You For Your AttentionAttention
Thank You For Your Thank You For Your AttentionAttention