shell company edsgn 100, sec. 017 still eagles submitted to andy lau december, 14 2009
TRANSCRIPT
The Cooking Device Of Maximum Efficiency
conceptShell Company
EDSGN 100, Sec. 017Still Eagles
Submitted to Andy LauDecember, 14 2009
Team Description
Mission Statement
Research
Analysis
Our Product
Table of Contents
Chris Jackson◦ [email protected]
Trevor Sherts◦ [email protected]
Dave Hoysan◦ [email protected]
Michael Reed◦ [email protected]
Still Eagles
Design a device which can be locally manufactured that fully utilizes fuel energy, wastes minimal heat, and reduces harmful smoke for safe
indoor cooking.
Mission Statement
PROS◦ Capturing and
converting light to heat
◦ Uses lenses and mirrors and a tracking system
◦ Renewable and sustainable energy source
◦ No Smoke◦ No Pollution
CONS◦ High installation cost◦ Limited availability◦ Obligated to cook
outside◦ Cooking is subject to
weather
Research (Solar Cooking)
Average annual income in Kenya: $360
Biomass fuels◦ For cooking and heating, 45.3%
of all energy consumption is used in the burning of wood for these needs
◦ Breakdown of overall fuels used in energy consumption: Non-Traditional – 28.4% Wood – 61.3% Charcoal – 7.6% Dung/other – 2.7%
Present Cookers:◦ Traditional Kenyan Stoves◦ Channel-type stoves ◦ Stove-less fire pits
Research (Biomass Cooking)
Well-insulated, melt-resistant walls Pot should fit over the heat source, but
with easy access A grate below the fuel for increased
airflow Space in between the pot and the fuel bed Cylindrical Shape Use of metal to radiate heat Use wide pots with large diameters
Efficiency
Envirofit Reduces emissions by
as much as 80%, use up to 60% less fuel and reduce cooking cycle time by up to 50%
$12.00-$50.00 10.4kg 29cmx30cmx29cm Plastic shell with alloy
interior 5-year warranty
Jiko Reduces fuel use by
about 50% Locally manufactured Easily made with scraps 35-75 Kenyan
Shillings/$2.00-$3.00 3.6kg 30cmx50cm in diameter Ceramics with metal
shell Lasts about 30 months
Research (Stoves)
½ the World’s population uses coal and biomass fuels
The sun’s rays
Petroleum-based fossil fuels
Ethanol
Biodiesel
Research (Fuel Alternatives)
Solar Cooking proved too unpractical◦ Weather permitting◦ Has to be outdoors◦ Expensive
Biomass cooking provides residents with an effective and inexpensive alternative◦ Locally produced◦ Versatile fuel◦ Energy efficient
Analysis
The DOME
Inner sheet metal shell reflects radiation inward reducing heat loss.
Dome shape prevents convective heat loss and allows pot to be completely surrounded by hot air to cook quickly and waste minimal energy.
Cooking Concept Details
27” Diameter Base, 21” Height15” Diameter Top, 6” Radius Fuel Opening
Cooking Surface◦ Grill like platform
extended into dome◦ Provides versatility –
different sized pots◦ Easily Cleaned
Exhaust System◦ Piping with rough
ceramic insert to filter smoke particulate
Features
15” Diameter x 12”, 1.5” Overhang
3” Diameter x 7” Length
Elevated Fuel Platform◦ Allows air to flow
around and under the fire to promote complete combustion
Tight Fitting Lid◦ Allows hot air to
surround cook pot without escaping from system
Features
17” x 10” x 2”
18” diameter x 2.5”
Front Back Sketch
The DOME
Sheet metal◦ Inner shell◦ Lid◦ $1.67 per sq. foot
Insulation◦ Secondary shell◦ $0.15 per sq. foot
Metal grating◦ Cooking platform/cage◦ Fuel platform◦ $2-$3
Metal piping◦ Exhaust system◦ $.079 per foot
Ceramics◦ Smoke filter plate◦ $3-$4
Materials / Cost