presentation of solar cooking competition

8/20/2019 Presentation of Solar Cooking Competition

1/20


2/20

AbstractMankind will continue to use energy, even if we all make a concerted to cut

down on our consumption.

So another important step to take if we want to save the environment is to

find alternative ways to produce and use sustainable, clean energy.The main purpose of our project is to replace old wood fuel stoves with an

eco-friendly solar cooker that uses green energy.

A solar cooker is a device which uses the energy of sunlight to heat food or

drink or to sterili!e it.

Solar cooking is a form of outdoor cooking and is often used in situationswhere minimal fuel consumption is important, or the danger of accidental

fires is high.

The vast variety of the solar cookers presently in use are cheap, low tech

devices because they use no fuel, no electricity re"uired to operate, they

reduce air pollution and slow deforestation and desertification.


3/20

#bjective $ AimTo cook food in the process of using solar energy instead

of electricity or fuel

To find an alternative way to cook without using fuel.To conceive an innovative idea to save resources.


4/20

%ntroduction and &roblem Statements'e would continue to waste earth(s resources without

proper management and efficiency.

%n order to solve this problem, we need an alternative wayto overcome our needs for energy. This leads us to the use

of green energy, a brilliant and effective way to overcome

the problem.


5/20

AdvantagesTo conserve the usage of fuel.

To save our cost by purchasing low cost of products

instead of high cost of fuel.&revent of air pollution.

&revent of global warming.

There is no danger of burning food and flavours remain

intact.


6/20

)isadvantages#nly functions during day time when weather is hot and

sunny.

Takes "uite long to cook.Takes long time to build the solar cooker.

Solar cookers are not as efficient at retaining heat as

compared to conventional cooking devices.

There is a risk of accidental injury or burns if theappliance is not used properly


7/20

Materials*ravels

)+ Arte black mat boards

oil paper Magnifying glass

A &aper

&lastic book wrapper

Spray paint /lack 0umber 12

&oly foam


8/20

Apparatus322ml water container that absorbs heat

/lack binding tape

Scissors

&4A glue

/oard cutter

5raser

6uler

/lue, black and red pens

&encil

/ig 0T cutter blade

Measuring cylinder


9/20

&ictorial )escriptions and StepsSteps and Description Pictures

7. &repare the materials and

apparatus.8. 9ut 3 mat boards for each si!e

according to si!es 12.3 cm :

12.3 cm and 1; cm : 1; cm

with a board cutter.


10/20

Steps and Description Pictures

1. >ine the inside of the small bo:

and large bo: with foil paperusing polystyrene glue.

. ?oin the cut 12.3 cm : 12.3 cm

and 1; cm : 1; cm mat boards

to make a bo: by taping the

sides using a binding tape.3. 9ut up some poly foam with

scissors and stuff them into the

space between the side walls of

the small bo: and large bo:.


11/20


@. &repare another mat boards

and cut them according to the

si!e shown with scissors.

. old all the flaps according to

the dotted lines.

;. >ine the inner surface of the

collectors e:clude all the flapswith foil paper.

B. ?oin the side flaps of all mat

boards with binding tape.


12/20


72. Tape the bottom flaps to theinner part of the small bo: with

binding tape.

77. Spray the water container with

black spray paint.

78. Measure 322 ml of water with a

measuring cylinder.

71. &our the water into the water

container.

7. &ut some gravels and the watercontainer into the plastic book

wrapper.

73. &ut a magnifying glass on top

of the wrapped water container.


13/20


7@. 'rap the whole solar cooker

with another bigger plastic book wrapper.

7. Measure the initial temperature.

7;. After several hours, measure

the final temperature.


14/20

Scientific Theory - Accumulation of Ceatoil paper helps to reflect the sunlight.

Magnifying glass helps to enhance the amount of sunlight

and heat.*ravels can absorb and retain heat.

A plastic book wrapper can trap the heat.

The poly foam helps to insulate the heat so that it prevents

heat loss.A dark water container used can get very hot in sunlight

compared to light surfaces.


15/20

Scientific 9oncept Application6eflection - Aluminium foil helps to reflect the sunlight to

the water container.

*reenhouse effect - The plastic book wrapper createsgreen house effect by trapping the heat that enters the

solar cooker.

6efraction D Sunlight is focused directly to the side of the

water container. 'hen sunlight travel through a densermagnifying glass medium light gets refracted and is

focused more towards the normal.


16/20

6easons of 9olour 9hosen


17/20

Trial and 5rror Monday Tursday

%nitial temperature 12°C %nitial temperature 12°C

Temperature after 8 hour s 32°C Temperature after 7 hour 32.3°C

Solar energy absorption

The result seems to be better on Thursday compared to Monday as

they are some changes made to the solar cooker.

5:amplea= More gravels are put to absorb and remain the heat.

b= The gravels had been spray to a darker colour.

c= A large plastic book wrapper is used to trap the heat.


18/20

9onclusionSolar cooker helps to conserve fuel.

Solar cooker re"uires less cost compared to the cost of

fuel.

Mankind should use solar cooker in order to conserve fuel

for the sake of the ne:t generation.


19/20

END O!

PRESENTATION 0ow for "uestion and answer session.


20/20

THANK "OU !OR

"OUR ATTENTION

presentation of solar cooking competition

Documents