The study aims to distinguish if a recycled shoe box and aluminum foil can be useful to make an alternative cooking machine. Furthermore, it sought to accomplish the following: To solve for the accurate theoretical focal length of the parabolic curve in the solar heated grill To construct a solar heated grill To design an experiment to test the functionality of the grill To perform a test to Term paper By Strain-Summand determine the magnitude of the heat of the grill per unit time D.
Significance of the study This research centers about a study to science most specifically Optics. Through this, he students will appreciate the energy that the sun is capable of giving. This study is also a gateway to knowledge for students and teachers with respect to the recycling of old shoe box. Another thing is that this primarily serves as motivating factor for the schools or institutions to direct their students and to further strengthen their capabilities in recycling materials.
Furthermore, the outcome of the study will provide information to authorized policy makers in Ecological recycled Waste Management (RA 9003). Converting these non-functional boxes does not only support the Republic Act 9003 but it also opens an avenue to develop technology in the community. On addition, this study will be able to lessen the consumption of non-renewable resources due to the fact that the energy used for heating food is from the sun which is indeed unlimited, paramount and will never cause us health problems and the like. E.
Scope and Limitation The conversion of an old carton box with aluminum foil into a solar heated grill is the main concern of this research. The structure or model of the project is parabolic. The coverage of this study is also the nature, use and contribution of solar energy. The study does not include geothermal energy and other types of energy. It is limited to the use of recycled shoe box, illustration (or any hard board) and aluminum foil. F. Definition of Terms For purpose of clarity, the following terms used in the study are hereby defined.
Containment – the act, process, or means of containing Insulation – a material that isolates conductive materials and helps to correctly channel electricity Parabolic – expressed by or being a parable Skewered – a pin of wood or metal for fastening meat to keep it in form while roasting r to hold small pieces of meat or vegetables for broiling Infrared- a region of the electromagnetic spectrum that has slightly longer wavelengths and lower frequencies than visible light al. Review of Related Literature A.
Theoretical Background In constructing a solar hearted grill, you must first design its structure like a parabolic dish. To equally spread the heat that the aluminum foil would emit during harnessing of solar energy, it is but important to know the exact measurement of its focal length. Focal length = f Depth = c Diameter = D Measure the depth using a tight fishing line across the dish and a rule to measure PPTP c. Solar ovens can be used to heat water or cook food. A part of going green means looking for alternative fuel sources that don’t negatively impact the environment.
One of the most readily available renewable energy sources is sunlight. Solar power can be used to generate electricity, heat water or even cook food. If you’re interested in reducing your carbon footprint, you may consider purchasing or building a solar cooker. These ovens convert sunlight into heat energy using three basic principles: 1 . Concentration Since solar cookers operate using only sunlight, they require some means of incinerating the sun’s energy. Typically, this is achieved by lining the solar cooker with some type of reflective material, such as aluminum foil, mirrored glass or reflective paint.
The position of the reflective material determines how the sunlight is concentrated. For example, a parabolic solar cooker features a curved design which concentrates sunlight in its center while a box cooker is designed to produce a more even distribution. 2. Conversion Once sunlight is concentrated, it must be absorbed and converted to infrared radiation or heat energy. This is achieved by incorporating dark, preferably black, trials into the cooker’s design. To convert heat energy in a parabolic cooker, it’s recommended that you use cooking pots that are made of a dark, thin metal.
The same is true for box cookers. Additionally, it’s recommended that you paint the interior and exterior of a box cooker with black heat-resistant paint to maximize light absorption. 3. Containment Once sunlight is absorbed and converted to heat energy, it must be contained in order to cook your food thoroughly. With a box cooker, adding insulation and other materials allows you to control how much heat is trapped inside. For example, placing bricks or rocks inside a box cooker increases the amount of heat it can hold.
You can also insulate box cookers by lining them with cardboard, placing a glass plate across the top or sealing the cooking pot inside a plastic bag. Since parabolic cookers heat food much more quickly, a containment method is generally not necessary. B. Related Studies C. Ill. Methodology A. Materials Glue gun Glue stick/s Cutter/knife Twelve-inch wide aluminum foil Double-sided tape (2) 9-inch long sticks about 1/16 inch in diameter Old shoe box Old illustration board 12-inch ruler B. Set-up Figure A C. Procedures Setting up the box Figure B 1 .
Select a long narrow shoe box; the longer the box the more heat collection is possible. 2. To get the theoretical focal length or parabolic curve of the box using the equation f = ( D* ( 16 * c ). 3. One template could be used for all the cookers. 4. Trace the curve on the open end of the box so that it is centered and straight. Constructing the Parabolic Curve 1 . Cut out the curve with a cutter/knife. 2. Measure and cut a piece of illustration board that will fix flush against the opening to the box. 3. Attach the piece of illustration board with the use of glue gun beginning at the center and working toward the edges. . Cover the curve with double-sided tape and apply aluminum foil shiny side out. 5. Start in the middle and smooth toward the edges. 6. Try not to wrinkle or fold the foil; you want it as smooth as possible. Setting up the skewer 1. Use two scraps of illustration board taped to each side as supports. 2. Using the sun or a projector light, test the focal point. There should be a bright spot where light is concentrated; mark this spot and punch a hole for the skewer. 3. Use a section off oat hanger from which the paint has been removed for a skewer. Testing the grill 1.
Skew your meat into the stick. 2. Place it on the coat hanger. 3. Leave it for a period of time. Determining the magnitude of the heat of the grill The “Hand Test”- is a simple test providing you with a reasonably accurate means of determining temperature. 1. Hold your hand, palm down, 2 to 3 inches above the grating and do not touch the grill! 2. Count the number of seconds before you are forced to remove your hand. 3. Use a table to tabulate the results of grilling temperature. ‘V. Bibliography http://www. Laurite. Com http://www. Oho. Com http://www. Personal. Us. Du http://www. Conscienceless. Com http://www. Scribed. Com http://www. Soliciting. Waking. Com http://www. Tackling. Com http://www. Thenceforth. Com http://www. Weeklies. Com Rationale It’s not a very common site today that people use their initiatives to create something new out from scraps. Moreover, people as well don’t take the initiative to look out for alternative sources which they never thought had capabilities of upholding immense beneficiaries. In this Investigatory Project, the researchers have come up to create heir own revised Solar Heated Grill in replacement of a cooking machine.
They would like to commence this kind of project such that this involves the usage and consumption of solar energy or solar power. Aside from the above mentioned, the researchers chose this project because of three main reasons (1) they want to prove that radiant light and heat from the sun (solar energy) is paramount, echo-friendly, indefinite, renewable and can be widely used in everyday life (2) they would want to maximize the use of old materials by recycling and (3) this Investigatory Project is easy and can be done in a short time allotment.
