Shane Project_Pizza Box Solar Oven

7/26/2019 Shane Project_Pizza Box Solar Oven

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Abstract

A Pizza Box Solar Oven is a great Solar Oven Projectwhich can help for betterunderstand of science behind solar energy the energy inherent in the sun's powerful

rays which so abundantly cover our planet earth

!ave you ever eaten food that was coo"ed outside# such as for a BB$ or whileca%ping& uring the su%%er it can be a lot of fun to be outdoors and enjoy eating thefruits(or burgers(of your coo"ing labors But you don't always need to burn wood#charcoal or gas to coo" outdoors id you "now that you can directly use solar power tocoo" food& )his can be done using a solar oven# which is a low*cost# ecologicallyfriendly technology +n this activity you will build your very own si%ple solar oven out of apizza box to gather the sun's rays and(coo" a tasty treat for you,

Si%ple solar coo"er can harness# %ultiply and concentrate the energy fro% the

sun to levels that can coo" al%ost any food you can i%agine And +t is acco%plished bythe basic principle of passive solar design which can concentrate a source of energy tosuch a point -level. as to create a change in the object -food. receiving the concentratedenergy

/our solar oven will reach about 011 2 on a sunny day# and will ta"e longer toheat things than a conventional oven# but can coo" just as well

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Chapter I

1. Introduction

)he sun is hot enough to ba"e food !ere's how to %a"e a si%ple solar oven that

gets hot enough to war% up coo"ies and other treats +t won't get really hot# though# so

you can't ba"e things in it and you won't burn yourself when observing with it Solar

ovens use solar energy(light and heat e%itted fro% the sun(to coo" food )hey can

also be used to pasteurize water or even sterilize instru%ents !ow does a solar oven

wor"& )he si%ple answer is that it is designed to absorb %ore heat than it releases

)he solar oven you will build in this activity is a relatively si%ple one %ade out of

a pizza box# alu%inu% foil# plastic wrap and a sheet of blac" paper /ou will cut a flap

out of the pizza box's lid and line this flap with alu%inu% foil )his will reflect sunlightinto the box /ou'll also seal the opening with plastic wrap )his plastic 3window3 wor"s

li"e a greenhouse roof# allowing -direct and reflected. sunlight to pass into the box#

while also retaining heat At the botto% of the box# you will place blac" paper )his will

act as a heat sin" that absorbs direct and reflected sunlight to war% it# which will heat

food placed on top of it

2. Hypothesis

Sunlight is pure energy )he sun is the original energy source 4early all other

sources of energy originally got their energy fro% the sun Plants convert solar energy

into leaves# flowers and fruits Ani%als# which eat plants# convert the energy into body

%ass 5hen ani%als die# their energy is deco%posed and over extensive ti%e#

beco%es stored as oil# coal or natural gas Sunlight also provides energy in the for% of

heat and light for hu%ans# ani%als and plants6

7se the sun energy to !eat up a )asty treat with this si%ple solar Oven

A !ow Solar 8oo"ing 5or"s&

B 5ill we be able to coo" %arsh%allows with solar energy&

8 !ow long do they thin" it will ta"e to coo" the %arsh%allows in the solar coo"er&

3. Significance of the Study

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:;aterials 4eeded

: 8ardboard Pizza Box

: 8utter < Scissors

: =oll Alu%inu% foil

: 8lear )ape

: Plastic 5rap-a heavy*duty or freezer zip loc" bag will also wor".

: Blac" 8onstruction Paper

: 4ews Paper

: =uler# or 5ooden Spoon

: )her%o%eter

Procedure

: 7se a cutter or sharp scissors to cut a flap in the lid of the pizza box 8ut along three

sides# leaving about an inch between the sides of the flap and the edges of the lid 2oldthis flap out so that it stands up when the box lid is closed

0 8over the inner side of the flap with alu%inu% foil so that it will reflect rays fro% thesun )o do this# tightly wrap foil around the flap# then tape it to the bac"# or outer side of

the flap

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> 7se clear plastic wrap to create an airtight window for sunlight to enter into the box

o this by opening the box and taping a double layer of plastic wrap over the openingyou %ade when you cut the flap in the lid ?eave about an inch of plastic overlap around

the sides and tape each side down securely# sealing out air +f you use a plastic bag# cutout a s@uare big enough to cover the opening# and tape one layer over the opening

?ine the botto% of the box with blac" construction paper(blac" absorbs heat )heblac" surface is where your food will be set to coo" !ow %uch you need will depend on

the size of the pizza box you're using to %a"e your solar oven

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)o insulate your oven so it holds in %ore heat# roll up sheets of newspaper and placethe% on the botto% of the box )ape the% down so that they for% a border around the

coo"ing area +t %ay be helpful to also tape the rolls closed first )he newspaper rollsshould %a"e it so that the lid can still close# but there is a seal inside of the box# so air

cannot escape

C )he best hours to set up your solar oven are when the sun is high overhead(fro% ::

a% to > p% )a"e it outside to a sunny spot and adjust the flap until the %ost sunlight

possible is reflecting off the alu%inu% foil and onto the plastic*covered window 7se a

ruler to prop the flap at the right angle /ou %ay want to angle the entire box by using a

rolled up towel

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D /ou can %a"e toast by buttering a slice of bread then letting the sun do the rest8oo"ing a hot dog or %a"ing nachos with chips and cheese are also fun treats to %a"e

in your solar oven, +t would also wor" great to heat up leftovers So the paper at thebotto% doesn't get dirty# put what you would li"e to coo" on a clear plastic or glass plate

A pie plate would wor" well Place the ther%o%eter inside your oven before you close it#so you can chec" the te%perature

E )o ta"e food out of the oven# open up the lid of the pizza box# and using oven %itts or

potholders# lift the glass dish out of the oven

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Chapter III

1. Presentation, Analysis and Interpretation

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)he principles de%onstrated areF

Solar ain* arranging for sunlight to enter a device as a source of energy +n this case#the gain is acco%plished both by reflection and direct gain )his principle also includesusing dar" colored surfaces to absorb the solar energy that enters a device

Insulation* containing heat by trapping air inside and around a device to contain heat#and reflecting ther%al radiation bac" into a device

)he third principle of passive solar design * ther%al %ass# can also be experi%entedwith the solar oven ?arge a%ounts of food will provide so%e ther%al %ass# causing theoven to heat up %ore slowly

Besides explaining these principles in the process of building and using the ovens# hereare several other points that %ight want to %a"eF

8oo"ing food ta"es a lot of energy, By using solar energy# we can save alot onfuel

8oo"ing ta"es ti%e# and the Sun will change position during that ti%e )herefore#

so%ebody# such as a vigilant coo"# %ay need to align the solar oven now and

then to "eep the sunlight entering ;echanis%s that trac" the sun and adjust the

device auto%atically are called 3heliostats3 -li"e ther%ostat# but with 3helio3#

which %eans 3Sun3# instead

2. !esults

On a sunny# war% day# your oven could reach about 011 degrees 2 )he foodta"es longer to coo" in a solar oven than a regular one

+n this activity it built a si%ple box*type solar oven that should have been able tocoo" a %arsh%allows in sunny# war% conditions +n so%e trials using a solar oven thatwas %ade based on this design# at E to G1 degrees 2 on a sunny afternoon it too"about >1 to > %inutes for the %arsh%allow to get war% enough to beco%e soft and%elt so%e of the chocolate to %a"e a tasty# solar*powered treat, +n ideal conditions thissolar oven can easily heat up to about :C1 to 011 degrees 2 7sing full# direct sunlight isi%portant for heating this solar oven(the sunlight needs to be reflected into the oven-pri%arily fro% the alu%inu% foil*covered flap# but also fro% the inside of the box.# and

the heat %ust be trapped and retained inside by the plastic 3window3 )his heat is alsoabsorbed by the blac" paper to heat the food that is placed on top of it

Solar oven can reach about 011H 2 on a sunny day and will ta"e longer to heatthings than a conventional oven Although this %ethod will ta"e longer# it is very easy touse# and it is safe to leave alone while the energy fro% the sun coo"s your food Acheese roll up by %elting cheese too" about %inutes for our cheese to %elt )heinternal te%perature of our pizza box solar oven was :0H 2

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"

+llustration :

#eather Condition $i%e $e%peratureSunny ay >1 %inutes 0112

8loudy ay >1*> %inutes E*G1 2

+llustration 0$ype of &oods $i%e $e%perature

;arsh ;allow >1*> %inutes E*G1 2

8heese %inutes :0 2

Chapter I'

1. Conclusion

)he heat fro% the sun is trapped inside of the pizza box solar oven# and it starts

getting very hot Ovens li"e this one are called collector boxes# because they collect thesunlight inside As it sits out in the sun# the oven eventually heats up enough to %elt

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cheese# or coo" a hot dog, =ays of light are co%ing to the earth at an angle )he foil

reflects the ray# and bounces it directly into the opening of the box Once it has gone

through the plastic wrap# it heats up the air that is trapped inside )he blac" paper

absorbs the heat at the botto% of the oven# and the newspaper %a"e sure that the heat

stays where it is# instead of escaping out the sides of the oven

2. !eco%%endation

)here are a lot of variables that you can try to twea" in your oven design to %a"eit even better 8an you %a"e your solar oven %ore efficient by changing the angle of thereflector flap# using different %aterials to insulate it or changing its shape or size&

2or greater heat retention and better coo"ing results# use a shallow# blac" or dar"colored pan# dish or pot that will fit inside the solar box coo"er and place it inside of anOven roasting bag -used for roasting tur"eys. and then seal or tie the bag closed )his

will create what is "nown as the 3greenhouse effect3# trapping extra heat and retainingstea% and %oisture which will in turn %axi%ize te%peratures and coo"ing results

+f you wish# you %ay add so%e extra reflector panels on the side in order toincrease the concentrations of sunlight into the box and onto the coo"ing pot# thusincreasing your te%peratures

3. !eferences

ihttpF

Shane Project_Pizza Box Solar Oven

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