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 THE SOLAR COOKING COMPETITION

ABSTRACT

Mankind will continue to use ener!" e#en i$ we all %ake a concerted to cutdown on our consu%&tion'

Anot(er i%&ortant ste& to take i$ we want to sa#e t(e en#iron%ent is to )nd

alternati#e wa!s to &roduce and use sustaina*le" clean ener!'

 T(e %ain &ur&ose o$ our &ro+ect is to re&lace old wood $uel sto#es wit( an

eco,$riendl! solar cooker t(at uses -reen- ener!'

A solar cooker is a de#ice w(ic( uses t(e ener! o$ sunli(t to (eat $ood or

drink or to sterili.e it'

Solar cookin is a $or% o$ outdoor cookin and is o$ten used in situations

w(ere %ini%al $uel consu%&tion is i%&ortant" or t(e daner o$ accidental

)res is (i('

 T(e #ast #ariet! o$ t(e solar cookers &resentl! in use are c(ea&" low tec(

de#ices *ecause t(e! use no $uel" no electricit! re/uired to o&erate" t(e!

reduce air &ollution and slow de$orestation and deserti)cation'

OB0ECTI1E 2 AIM

 To cook $ood in t(e &rocess o$ usin solar ener! instead o$ electricit! or $uel

 To )nd an alternati#e wa! to cook wit(out usin $uel'

 To concei#e an inno#ati#e idea to sa#e resources'

INTRO34CTION AN3 PROBLEM STATEMENTS

5e would continue to waste eart(6s resources wit(out &ro&er %anae%ent

and e7cienc!'

In order to sol#e t(is &ro*le%" we need an alternati#e wa! to o#erco%e our

needs $or ener!' T(is leads us to t(e use o$ reen ener!" a *rilliant and

e8ecti#e wa! to o#erco%e t(e &ro*le%'

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A31ANTAGES

 To conser#e t(e usae o$ $uel'

 To sa#e our cost *! &urc(asin low cost o$ &roducts instead o$ (i( cost o$

$uel'

Pre#ent o$ air &ollution'

Pre#ent o$ lo*al war%in'

 T(ere is no daner o$ *urnin $ood and 9a#ours re%ain intact'

3ISA31ANTAGES

Onl! $unctions durin da! ti%e w(en weat(er is (ot and sunn!'

 Takes /uite lon to cook'

 Takes lon ti%e to *uild t(e solar cooker'

Solar cookers are not as e7cient at retainin (eat as co%&ared to

con#entional cookin de#ices'

 T(ere is a risk o$ accidental in+ur! or *urns i$ t(e a&&liance is not used

&ro&erl!

MATERIALS

Gra#els

3: Arte *lack %at *oards

;oil &a&er

Mani$!in lass

A< Pa&er

Plastic *ook wra&&er

S&ra! &aint = Black Nu%*er >?

Pol! $oa%

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APPARAT4S

@??%l water container t(at a*sor*s (eat

Black *indin ta&e

Scissors

P1A lue

Board cutter

Eraser

Ruler

Blue" *lack and red &ens

Pencil

Bi NT cutter *lade

Measurin c!linder

PICTORIAL 3ESCRIPTION AN3 STEPS

' Pre&are t(e %aterials and a&&aratus'

' Cut @ %at *oards $or eac( si.e accordin to si.es >?'@ c% >?'@ c% and >Dc% >D c% wit( a *oard cutter'

>' Line t(e inside o$ t(e s%all *o and lare *o wit( $oil &a&er usin

&ol!st!rene lue'

<' 0oin t(e cut >?'@ c% >?'@ c% and >D c% >D c% %at *oards to %ake a *o

*! ta&in t(e sides usin a *indin ta&e'

@' Cut u& so%e &ol! $oa% wit( scissors and stu8 t(e% into t(e s&ace *etween

t(e side walls o$ t(e s%all *o and lare *o'

' Pre&are anot(er < %at *oards and cut t(e% accordin to t(e si.e s(own wit(

scissors'

F' ;old all t(e 9a&s accordin to t(e dotted lines'

D' Line t(e inner sur$ace o$ t(e collectors eclude all t(e 9a&s wit( $oil &a&er'

' 0oin t(e side 9a&s o$ all %at *oards wit( *indin ta&e'

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?'Ta&e t(e *otto% 9a&s to t(e inner &art o$ t(e s%all *o wit( *indin ta&e'

'S&ra! t(e water container wit( *lack s&ra! &aint'

'Measure @?? %l o$ water wit( a %easurin c!linder'

>'Pour t(e water into t(e water container'

<'Put so%e ra#els and t(e water container into t(e &lastic *ook wra&&er'

@'Put a %ani$!in lass on to& o$ t(e wra&&ed water container'

'5ra& t(e w(ole solar cooker wit( anot(er *ier &lastic *ook wra&&er'

F'Measure t(e initial te%&erature'

D'A$ter se#eral (ours" %easure t(e )nal te%&erature'

SCIENTI;IC THEOR ACC4M4LATION O; HEAT

;oil &a&er (el&s to re9ect t(e sunli(t'

Mani$!in lass (el&s to en(ance t(e a%ount o$ sunli(t and (eat'

Gra#els can &ro#ide so%e (eat'

A &lastic *ook wra&&er can tra& t(e (eat'

 T(e &ol! $oa% (el&s to insulate t(e (eat so t(at t(e (eat will not loss easil!'

A dark water container used can et #er! (ot in sunli(t co%&ared to li(t

sur$aces'

SCIENTI;IC CONCEPT APPLICATION

Re9ection , Alu%iniu% $oil (el&s to re9ect t(e sunli(t to t(e water container'

Green(ouse e8ect , T(e &lastic *ook wra&&er (el&s to act as a reen (ouse

e8ect'

Re$raction , Sunli(t is $ocused directl! to t(e side o$ t(e water container'

5(en sunli(t tra#el t(rou( a denser %ani$!in lass %ediu% li(t ets

re$racted and is $ocused %ore towards t(e nor%al'

REASONS O; COLO4R CHOSEN

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Black is

3ark

3ull

Good a*sor*er o$ (eat

Good conductor

O&&osed to w(ite" w(ic( is

Bri(t

S(in!

Poor a*sor*er o$ (eat

Poor conductor

 TRIAL AN3 ERROR

MON3A TH4RS3AInitial te%&erature = >?JC Initial te%&erature = >?JC

 Te%&erature a$ter (ours = @?JC Te%&erature a$ter (our = @?'@JCSolar ener! a*sor&tion= T(e result see%s to *e *etter on T(ursda! co%&ared to

Monda! as t(e! are so%e c(anes %ade to t(e solar cooker'

Ea%&le=

a More ra#els are &ut to a*sor* and re%ain t(e (eat'* T(e ra#els (ad *een s&ra! to a darker colour'c A lare &lastic *ook wra&&er is used to tra& t(e (eat'

CONCL4SION

A solar cooker (el&s to conser#e $uel'

A solar cooker onl! needs less cost co%&ared to t(e cost o$ $uel'

Mankind s(ould use solar cooker in order to conser#e $uel $or t(e sake o$ t(e

net eneration'