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==Background==
==Background==
Locally Delicious is an organization founded by 5 women who call themselves "the heirloom tomatoes." Their goal is to motivate people to eat local foods and become self-reliant. They have been long time advocates for sustainable living, and have published their highly praised book called ''Locally Delicious''. They are currently working on a second book called ''Lunch Box Envy'' which its main objective is to empower kids with their own healthy food choices in order for them to become more self-sufficient. This book includes simple recipes and projects to create "enviable lunches" that are tasty, healthy, and easy-to-prepare.
Locally Delicious is an organization founded by 5 women who call themselves "the heirloom tomatoes." Their goal is to motivate people to eat local foods and become self-reliant. They have been long time advocates for sustainable living, and have published their highly praised book called [[Locally Delicious]]. They are currently working on a second book called ''Lunch Box Envy'' which its main objective is to empower kids with their own healthy food choices in order for them to become more self-sufficient. This book includes simple recipes and projects to create "enviable lunches" that are tasty, healthy, and easy-to-prepare.


==Problem Statement and Criteria==
==Problem Statement and Criteria==

Revision as of 22:55, 5 April 2011

Abstract

Our goal was to create a solar oven that children ages 8-12 could build and use independently. It was also a priority to create something different and more creative than just an aluminum foil covered shoe box. We wanted to get the children thinking about the food they eat and how to be more self-sustaining through our project. We worked with several designs and tested them with children at local elementary schools until we decided on the final design, the Solar Bowling Oven. The Solar Bowling Oven incorporates all the criteria asked by our client, Locally Delicious, so it would hopefully be incorporated in their new book called Lunchbox Envy.

Background

Locally Delicious is an organization founded by 5 women who call themselves "the heirloom tomatoes." Their goal is to motivate people to eat local foods and become self-reliant. They have been long time advocates for sustainable living, and have published their highly praised book called Locally Delicious. They are currently working on a second book called Lunch Box Envy which its main objective is to empower kids with their own healthy food choices in order for them to become more self-sufficient. This book includes simple recipes and projects to create "enviable lunches" that are tasty, healthy, and easy-to-prepare.

Problem Statement and Criteria

To design a solar oven that kids ages 8-12 can make and operate with the hopes of being able to cook things such as cookies and bagel pizzas.

Below are the definitions of the criteria. The definitions contain detailed summaries of the criterion

Cost- The at home replication cost of the materials are not to exceed $15.

Efficiency/ Effectiveness- The model is able to cook common baked goods with no problems within a 4 hour time period.

Ease to build/use- Replication of the model is to be relatively easy in attaining materials for kids ages 8-12, and ease of construction in 4x4x4ft³ workspace.

Aesthetics- The look of the model must be relatively pleasing to the eye.

Safety- The construction and handling of the replicated model must have minimal injury to kids.

Durability-The structure should be able to withstand at least 3 uses.

Design Creativity- The design must provide a sense of originality to the model.

Versatility- The model must be able to operate under different climates.

Description of Final Project

Cost

Implementation Costs

Material Quantity Individual cost Retail cost Our cost
glass bowl 1 $7.99 $7.99 $7.99
small pot 1 $6.99 $6.99 $6.99
black electrical tape 1 $0.99 $0.99 $0.99
Saran wrap 1 roll $1.99 $1.99 at home
aluminum foil 1 roll $2.99 $2.99 at home
cardboard box 1 Find salvaged salvaged salvaged
Total $22.95 $15.97

Maintenance Costs

The maintenance that's required are saran wrap and electrical tape. One roll of saran wrap will last more than 10 trials and one roll of electrical tape will last at least five applications with each application allowing 10 uses.

Testing Results

How to Build

The required materials before construction of the solar oven are: big glass bowl, smaller cooking bowl, lids for both bowls or saran wrap, black electrical tape, aluminum foil, tape, an unfolded cardboard box (volume of box should be around 18”x18”x18”), and oven mitts.

Creating the Reflector Panel

The first step in creating the solar bowling oven is creating the reflector panel. The cardboard box needs to have the top and bottom flaps of the box unfolded. Then place the cardboard box on its side so that it lays flat and compressed (See figure 1). Now, tear long sheets of the aluminum foil, with the shiny side up, and tape them to the flattened middle body of the box and the flattened top lid flaps (See figure 2). Tape the aluminum foil on the cardboard so that it is as flat and shiny as possible. The bottom flaps of the box are not to be covered in aluminum foil because they provide the standing of the reflector panel. After the cardboard has the aluminum foil taped to it, stand the reflector panel up so that the bottom flaps that aren’t covered in aluminum foil fold outward and provide standing. Turn the two sides so that are in between a 90 and 180 degree angle (See figure 3).

Creating the Solar Bowling Oven

The next step is to create the solar oven itself. First, cover the smaller cooking bowl with the black electrical tape. The black electrical tape needs to be wrapped around the outside of the smaller cooking bowl so that it covers the entire bowl. Next, put the food that is going to be cooked inside of the smaller cooking bowl. If there is a lid accompanied with the smaller cooking bowl, the top lid should also be covered with the black electrical tape and placed on top of the smaller cooking bowl with the food inside. If there isn’t a lid accompanied with the smaller cooking bowl, cover the smaller cooking bowl with the food inside with saran wrap so that it is sealed. Now, put the covered smaller cooking bowl inside of the big glass bowl and cover the top of the big glass bowl with a lid or saran wrap. If the lid that accompanies the glass bowl doesn’t provide a tight seal, cover the outer rim with tape.

Cooking Time

After the reflector panel and Solar Bowling Oven have been created, bring them out to a sunny area. Angle the reflector towards the sun and place the Solar Bowling Oven in the middle of the reflector panel. If the weather isn’t very sunny, a black towel can be wrapped around the rim of the big glass bowl for better insulation. Leave the reflector panel and oven in the sun for 2-3 hours depending on the amount of sun. When handling the solar oven after it has been in the sun, remember to use the oven mitts.

Discussion and Next Steps

References

Solar Sous Chefs

http://www.locally-delicious.org/

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