Post on 07-Aug-2018
transcript
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THE SOLAR COOKING COMPETITION
OUR SOLAR COOKER
By: Elizabeth Simon, Kevin Yok and Liew Jien Jie
(Representin the s!hool o" S#K #erba$%
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&bstra!t#ankind will !ontin$e to $se enery, even i" we all make a !on!erted to !$t
down on o$r !ons$mption'
So another important step to take i" we want to save the environment is to
"ind alternative ways to prod$!e and $se s$stainable, !lean enery'he main p$rpose o" o$r pro)e!t is to repla!e old wood "$el stoves with an
e!o*"riendly solar !ooker that $ses +reen+ enery'
& solar !ooker is a devi!e whi!h $ses the enery o" s$nliht to heat "ood or
drink or to sterilize it'
Solar !ookin is a "orm o" o$tdoor !ookin and is o"ten $sed in sit$ationswhere minimal "$el !ons$mption is important, or the daner o" a!!idental
"ires is hih'
he vast variety o" the solar !ookers presently in $se are !heap, low te!h
devi!es be!a$se they $se no "$el, no ele!tri!ity re$ired to operate, they
red$!e air poll$tion and slow de"orestation and deserti"i!ation'
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-b)e!tive . &imo !ook "ood in the pro!ess o" $sin solar enery instead
o" ele!tri!ity or "$el
o "ind an alternative way to !ook witho$t $sin "$el'o !on!eive an innovative idea to save reso$r!es'
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/ntrod$!tion and 0roblem Statements1e wo$ld !ontin$e to waste earth2s reso$r!es witho$t
proper manaement and e""i!ien!y'
/n order to solve this problem, we need an alternative wayto over!ome o$r needs "or enery' his leads $s to the $se
o" reen enery, a brilliant and e""e!tive way to over!ome
the problem'
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&dvantaeso !onserve the $sae o" "$el'
o save o$r !ost by p$r!hasin low !ost o" prod$!ts
instead o" hih !ost o" "$el'0revent o" air poll$tion'
0revent o" lobal warmin'
here is no daner o" b$rnin "ood and "lavo$rs remain
inta!t'
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3isadvantaes-nly "$n!tions d$rin day time when weather is hot and
s$nny'
akes $ite lon to !ook'akes lon time to b$ild the solar !ooker'
Solar !ookers are not as e""i!ient at retainin heat as
!ompared to !onventional !ookin devi!es'
here is a risk o" a!!idental in)$ry or b$rns i" theapplian!e is not $sed properly
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#aterials4ravels
35 &rte bla!k mat boards
6oil paper
#ani"yin lass
&7 0aper
0lasti! book wrapper
Spray paint : Bla!k 8$mber 9
0oly "oam
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&pparat$s;ml water !ontainer that absorbs heat
Bla!k bindin tape
S!issors
0
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0i!torial 3es!riptions and StepsSteps and Description Pictures
=' 0repare the materials and
apparat$s'>' ?$t ; mat boards "or ea!h size
a!!ordin to sizes 9'; !m @
9'; !m and 9A !m @ 9A !m
with a board !$tter'
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Steps and Description Pictures
9' Line the inside o" the small bo@
and lare bo@ with "oil paper$sin polystyrene l$e'
7' Join the !$t 9'; !m @ 9'; !m
and 9A !m @ 9A !m mat boards
to make a bo@ by tapin the
sides $sin a bindin tape';' ?$t $p some poly "oam with
s!issors and st$"" them into the
spa!e between the side walls o"
the small bo@ and lare bo@'
(?$rrently not available%
(?$rrently not available%
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Steps and Description Pictures
' 0repare another 7 mat boards
and !$t them a!!ordin to the
size shown with s!issors'
C' 6old all the "laps a!!ordin to
the dotted lines'
A' Line the inner s$r"a!e o" the
!olle!tors e@!l$de all the "lapswith "oil paper'
D' Join the side "laps o" all mat
boards with bindin tape'
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Steps and Description Pictures
=' 1rap the whole solar !ooker
with another bier plasti! book wrapper'
=C' #eas$re the initial temperat$re'
=A' &"ter several ho$rs, meas$re
the "inal temperat$re'
(?$rrently not available%
(?$rrently not available%
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S!ienti"i! heory * &!!$m$lation o" eat6oil paper helps to re"le!t the s$nliht'
#ani"yin lass helps to enhan!e the amo$nt o" s$nliht
and heat'4ravels !an absorb and retain heat'
& plasti! book wrapper !an trap the heat'
he poly "oam helps to ins$late the heat so that it prevents
heat loss'& dark water !ontainer $sed !an et very hot in s$nliht
!ompared to liht s$r"a!es'
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S!ienti"i! ?on!ept &ppli!ationRe"le!tion * &l$mini$m "oil helps to re"le!t the s$nliht to
the water !ontainer'
4reenho$se e""e!t * he plasti! book wrapper !reatesreen ho$se e""e!t by trappin the heat that enters the
solar !ooker'
Re"ra!tion F S$nliht is "o!$sed dire!tly to the side o" the
water !ontainer' 1hen s$nliht travel thro$h a densermani"yin lass medi$m liht ets re"ra!ted and is
"o!$sed more towards the normal'
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Reasons o" ?olo$r ?hosen
Bla!k isG
• 3ark• 3$ll• 4ood heat absorber
• 4ood heat!ond$!tor
-pposed to white,whi!h is''
• Briht• Shiny• 0oor heat absorber
• 0oor heat!ond$!tor
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rial and Error Monday Tursday
/nitial temperat$re : 9°C /nitial temperat$re : 9°C
emperat$re a"ter > ho$r s: ;°C emperat$re a"ter = ho$r : ;';°C
Solar enery absorption:
he res$lt seems to be better on h$rsday !ompared to #onday as
they are some !hanes made to the solar !ooker'
E@ample:a% #ore ravels are p$t to absorb and remain the heat'
b% he ravels had been spray to a darker !olo$r'
!% & lare plasti! book wrapper is $sed to trap the heat'
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?on!l$sionSolar !ooker helps to !onserve "$el'
Solar !ooker re$ires less !ost !ompared to the !ost o"
"$el'
#ankind sho$ld $se solar !ooker in order to !onserve "$el
"or the sake o" the ne@t eneration'
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END O!
PRESENTATION 8ow "or $estion and answer session' (H I & Session%
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THANK "OU !OR
"OUR ATTENTION