# Solar Heated Grill sample essay

We would like to thank following for their endless help in making this Investigatory Project: a. Our Parents who are always there to guide and support us in all our activities, encouraging us to do more and to give more of ourselves. b. Our teacher, Ms. Neis who is always there nourishing our hunger for curiosity, allowing us to submit some chapters even late. c. Friends and classmates who keep us alive all the time.

d. Lastly, to our Creator, who gave all this talents, skills, knowledge and many more that we have used in making this Investigatory Project possible

ABSTRACT

This study aimed to find out if an old shoebox and a thick tin foil can be converted to amore useful piece of cooking equipment.The feasibility of reflective solar heated grillthat is built from a cardboard box, tin foil, and posterboard as an alternative cookingequipment was studied in this research project. The cardboard box was cut andshaped.the tin foil is settled in the middle making it looks like a slide.we go outside inthe heat of the sun. the barbeque sticks were placed in the spot where reflection of thesunlight focuses on the hotdog .just like a real skewer the hotdog were cooked therefor minutes.tasted it.and voila.real hotdogs on stick just like mom used to cook.

Chapter I
Introduction

A solar heated grill can be built from a cardboard box, tin foil, and posterboard. Sunlighthits the reflective surface and focuses on the hot dog held in the center. Students canwork in pairs or individually if there are enough materials.This is a parabolic cooker we built a while ago, so unfortunately we can’t show step bystep photos of it’s construction. However, it’s relatively easy to see how it was puttogether.It makes a great Physics project. Unlike most, you’ll actually get some use out of itafterwards. Some of the principles it demonstrates are: 1. Optics: focusing parallel rays of incident light through the use of a parabolic mirror. 2. Energy transformation: light to heat

3. Renewable energy: solar power
OBJECTIVES

General Objective:
This study thru physics aims to find out if an old shoe carton box can be useful to makean alternative cooking machine.

SIGNIFICANCE OF THE STUDY

This study aims to find out if an old shoe carton box can be useful to make analternative cooking machine.player is significant to different sectors for various reasons:· Serve as an eye-opener for those who don·t have a grill in their backyard who want toconvert their old shoe box carton into a hotdog grilling machine.· Provide information to students and teachers with respect to the recycling of cartonbox or old shoe box. Serve as motivating factor for the schools or institutions to direct their students and tofurther strengthen their capabilities for developing old carton box into a cooking grilland other processes to maximize the recycling of old carton box.Furthermore, the outcome of the study will provide empirically ² based information topolicy makers in Ecological recycled Waste Management. (RA 9003) junk cartons areusually stocked or thrown out elsewhere .Converting these non-functional cartons doesnot only support RA 9003 but it also opens an avenue to develop technology in thecommunitySignificance of the Study

Scope and Limitations

This study was conducted February 23,2013 to February 25,2013.finalized in a day.It is limited to the use of carton box, tin foil. Glues, muskin tape barbeque sticks,andhotdogs.yummy.The conversion of an old carton box into a solar heated grill is the main concern of thisresearch. The output can be done by properly assembling it Estimated Time Frame: 2 Days

Definition of Terms

For purpose of clarity, the following terms used in the study are hereby defined. Hotdog – A commonly-used (but etymologically obscure) term for a sausage that isusually eaten in a bun with ketchup, mustard, and/or relish. Grill – .Outdoor cooking appliance .To cook food above charcoal, gas or other means of heat. (typically outside) . Tin Foil – A wrapping substance to keep food freshSkewer – is a thin metal or wood stick used to hold pieces of food together. They areused while grilling or roasting meats, and in other culinary applications.

Chapter II
Review of Related Literature

Proper grilling doesn’t come from propane or charcoal. Either can be used to produce tasty results. No, the most important aspect is high heat management. Getting your grill hot enough to give that grilled flavor on your steak without turning it to ash is an art. That’s why this new solar powered grill has me weary. It’s not an electric grill that runs on solar power, it’s literally a grill that cooks with the sun. Cool idea, yet I can’t help but fear it provides mediocre fare for the paper plate. The Solar-Grill uses a flexible mirror to aim the suns rays at the black “barbecue cup” to get it nice and toasty. You then simply throw the meat on and the heat generated during the preheat phase cooks the meat. Since it’s light and easily transportable this is a good solution for camping or even tailgating. No need to worry about flames or smoke, just cooked meat to enjoy.

I recommend putting your meat on a stick because everything is better in a stick, it’s why lamb chops are so inherently good. If you’re interested in testing this thing out it can be picked up for \$240. That seems a bit pricey considering you can pick up a Weber charcoal grill for less than \$100. But hey, you’re cooking with the power of the sun. Captain Planet would be proud.It can be used as a science project but there’s a minimal chance that it can create a mess when not properly handled. This project is intended for secondary students with a parental supervision. (http://www.cinemablend.com/technology/Solar-Grill-Uses-The-Sun-To-Cook-Food-
3715.html Chapter III

Methodology

Materials:

1. Two pieces of heavy cardboard (like the side of a cardboard carton). The first piecemust be at least ten inches squareand the second smaller piece must be at least four inches by five inches.

2. A piece of light posterboard eight inches wide and sixteen inches long.

3. Twelve-inch wide aluminum foil. (You will use about 32 inches of the material.)

4. Some masking tape. (You may experiment with other types of tape.)

5. Nine inch long sticks about 1/16 inch in diameter. You may also use lengths of heavywire.

Procedure:

Select a long narrow box; the longer the box the more heat collection is possible.Choose a focal length between 5″ and 10″ and design a parabolic curve as seenin the picture. One template could be used for all the cookers. Trace the curve onthe open end of the box so that it is centered and straight.Cut out the curve with a utility knife. Stress the importance of being exact.Measure and cut a piece of posterboard that will fix flush against the opening tothe box. Attach this with tape beginning at the center and working toward toedges .

Cover the curve with white glue and apply aluminum foil shiny side out. Start inthe middle and smooth toward the edges. Try not to wrinkle or fold the foil; youwant it as smooth as possible.Use two scraps of cardboard taped to each side as supports. Using the sun or aprojector light, test the focal point. There should be a bright spot where light isconcentrated; mark this spot and punch a hole for the skewer. Use a section of acoat hanger from which the paint has been removed for a skewer.

Chapter IV
Discussion of Results

This chapter presents the data, analysis and interpretation of findings. It is in this partwhereby the data have been sorted out, tabulated, subjected to statistical analysis andthen the findings were interpreted.after we had produced the hotdog grill out of recycled old carton box.and grilled thehotdog there thru spotted sunlight reflections on the tin foil. We asked somebody torate the taste and acceptance of the food

Chapter V
Summary, Conclusion, and Recommendation

Summary

Solar Grill helps us in many ways, in conserves energy and it may come in handy, it can be even made thourgh recyclable materials.

Conclusion

Our hypothesis was right. The hot dog grill made of cardboard can really cookeddelicious hotdogs which is acceptable in the real world, the cooker is cheap if built.because the materials are not expensive.produced hotdog is the same as it is cooked inthe grill.We think that if a reflective hot dog cooker can be built from a cardboard box,tin foil, and posterboard is feasible that hotdog can be cooked there just like mamaused to cook. We think that it is cheaper and economical since we live in a tropicalcountry, we think that this will be acceptable in our time.

Recommendation

On the basis of the conclusions formulated, the following recommendations are offeredfor possible further study. 1.Information disseminations to the people on the proper recycling of old anddilapidated Carton boxes and other recycled wastes should be intensified. 2.People should know the values of recycling not only the biodegradable andnonbiodegradable wastes but also for them to do their part to cut down onwaste pollution that affects the environment. 3.carton users should be guided accordingly on how to recycle destroyed shoecartons rather than to junk them elsewhere, because dumping them elsewhere,will eventually can cause messy surroundings. For them also to help reduce thefire which are fatal to human beings

APPENDICES
What are the basic kinds of solar cookers?
There are three basic kinds:

* Box cookers-This type of cooker has been the advantage of slow, even cooking of largequantities of food. Variations include slanting the face toward the sun and thenumber of reflectors. You’ll find an article discussing solar box cooker designshere. * Panel cookers-This recent development was sparked by Roger Bernard in France. In this design,various flat panels concentrate the sun’s rays onto a pot inside a plastic bag orunder a glass bowl. The advantage of this design is that they can be built in anhour or so for next to nothing. In Kenya, these are being manufactured for theKakuma Refugee Camp project for US\$2 each.

* Parabolic cookers-These are usually concave disks that focus the light onto the bottom of a pot. Theadvantage is that foods cook about as fast as on a conventional stove. Thedisadvantage is that they are complicated to make, they must be focused often tofollow the sun, and they can cause burns and eye injury if not used correctly.Some of these concerns have recently been reduced by Dr. Dieter Seifert’s design.There is a detailed document here showing a large number of variations on thesethemes. You can also listen to a good introduction to solar cooking here. Who made the first solar cooker?

The first solar cooker we know of was invented by Horace de Saussure, a Swiss naturalistexperimenting as early as 1767. See this article for more info. Where are solar ovens being used the most? Here are reliable reports that there are over 100,000 cookers in use in both India andChina. We are aware of solar cooking projects in most of the countries of the world.Solar Cookers International has recently had a breakthrough in Kenya using the CooKitpanel cooker. More than 5000 families are now solar cooking there. How hot do solar ovens get?

Place an oven thermometer in the sunny part of the oven to get a reading similar towhat the cooking pot is “feeling”. The temperature reached by box cookers and panelcookers depends primarily on the number and size of the reflectors used. A single-reflector box cooker usually tops out at around 150° C (300° F) as the food approachesbeing done. High temperatures, however, are not needed for cooking. Your oven willcook just fine as long as it gets up to about 90° C (200° F) or so. Higher temperaturescook larger quantities, cook faster, and allow for cooking on marginal days; However,many people prefer to cook at lower temperatures, since then they can leave the foodto cook while they go about their business. With a single-reflector box cooker, once thefood is cooked, it just stays warm and doesn’t scorch. It’s good to keep in mind that nofood can go above 100° C (212° F) at sea level anyway, unless a pressurized cookingvessel is used. The high temperatures you see in cookbooks for conventional ovens are just for convenience and for special effects such as quick browning.

How long does it take to cook a meal?

As a rule of thumb, you can figure that food in a single-reflector box cooker will takeabout twice as long as in a conventional oven . However, since you can’t really burn yourfood, you don’t have to watch the cooker or stir any food as it cooks. You can just put ina few pots with different foods and then come back later in the day and each pot willcook to perfection and then stay hot until you take it out.Panel cookers cook smaller portions, usually only in a single pot, but often they cookslightly faster. Some people have reported the need to stir food every once in a whilewhen using this kind of cooker to assure that the food heats evenly.Cooking with a parabolic cooker is very similar to cooking on one burner of aconventional stove. Since the concentrated sunlight shines directly on the bottom of apot, the pot heats up and cooks very quickly. The food will burn though. So you have tostir it and watch it carefully.

Do you have to turn the cooker to follow the sun?

Box cookers with one back reflector don’t need to be turned unless you are cookingbeans which take up to 5 hours. Panel cookers need to be turned more often than boxcookers, since they have side reflectors that can shade the pot. Parabolic cookers are themost difficult to keep in focus. These need to be turned every 10 to 30 minutes,depending on the focal length.

Should I take the time to build a box cooker out of “real” materials like plywoodor glass or is cardboard good enough? Unless you need a cooker that can stay outside even in the rain, you’ll do just fine with a cardboard cooker. Cardboard is much easier to work with and holds heat just as well.Some people we know have used the same cardboard box cooker for over 10 years. Would a mirror make a better reflector?

While mirrors are more reflective than simpler materials such as aluminum foil, but theadded gain is probably not worth the increased cost and fragility involved with using a mirror? What kind of pots work best?

Ideally, you want to use a dark, light-weight, shallow pot that is slightly larger than thefood you will cook in it. Metal pans seem to cook best. Hardware stores in the USusually carry dark, speckled, metal pans called Graniteware. Shiny aluminum pots–socommon in developing countries–can be painted black or can be blackened in a fire.Cast iron pots will work, but extra solar energy is used to heat up the pot as well as thefood, so they will not work in marginal conditions

If solar ovens are so good, why isn’t everyone using one? There are many factors at work here. First and foremost, the vast majority of the world’spopulation does not even know that it is possible to cook with the sun. When they findout about it there is almost universal enthusiasm, especially in regions where thegathering of cooking fuel and the process of cooking over a smoky fire is a greatburden. There are many factors that need to be in place to make it possible for poorpeople to solar cook on an on-going basis. The most successful projects have been oneswhere the need was the greatest, the weather the most favorable, and where the solarcooking promoters have taken a long-range approach to the transition. An example of this is the work by Solar Cookers International in the Kakuma refugee camp in Kenya. If you build a box cooker out of cardboard, won’t it catch fire? No. Paper burns at 451° F (233° C) and your cooker won’t get that hot.

BIBLIOGRAPHY

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