ppt perpindahan massa - drying
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7/17/2019 PPT Perpindahan Massa - Drying
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DRYINGKELOMPOK 1
ATIKAH RIDHOWATI ( 1306392922)ELSA PRISNA WIDYASMARA (1306392790)
RISYA UTAVIANI PUTRI (1306370423)
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Dr!"#
• P$"#$r%!&" ' Pr$ *"%*+ ,$"#-!.&"#&" +&/&r &!r(!%*r$ "%$"%) /&r! *&%* *%&"!
• K&r&+%$r!%!+ ' $*!.!r!* !%*r$ "%$"%
• K"$, /r!"# ' S*&%* ,&/&%&" /&,&% /!+$r!"#+&" &,&
%$+&"&" ,&r!&. !%*r$ .$!- $&r /&r! %$+&"&" */&r& $+!%&r
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K&/&r A!r K$$%!&"#&"
• 5&% ,&/&% &&- !+& /!+"%&++&" /$"#&" */&r$,*"&! +$.$&&" /&" *-* %$r%$"%* /$"#&"&+%* *+*, .&&8 &+& &+&" /!&,&! ++$$%!&"#&" /!&"& +&"/*"#&" &!r ,&/& &%!/&+ $r*&- K&"/*"#&" &!r ,&/& +"/!! !"! +&/&r &!r +$$%!&"#&"
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• P&/& ,r!"!,"& &!r /&.& &-&" ,&/&% $r&/& /&.& /*& S$*.&- &!r $r&/& /&.& ,r!:,r! ,&/&%&" +&r$"&%$#&"#&" ,$r*+&&" &"# /!$*% unbounded water &%&* & A!r !"! $,*"&! %$+&"&" *&, /&" ,&"& .&%$" ,$"#*&,
/$"#&" &!r *r"!• S$/&"# &!r &"# $r&/& /&.& &-&" ,&/&%&" $,*"&!
/$"#&" &-&" ,&/&% !&."&8 &!r +r!%&. &%&* &"# &/& /! ,$&% ,&/&% !&."& &!r %$r&/r,! /!$*% &!r %$r!+&% &%&*water A!r %$r!+&% !"! $,*"&! %$+&"&" *&, &"# .$!- +$*r"!
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• S$&+!" .$& */&r& /! /&.& r*&"# ,$"#$r!"# /&" $+!%&r"&+&" $&+!" .&& ,r$ ,$"#$r!"#&" $r.&"#*"#8 $#!$&.!+"& +&r$"& */&r& +$r!"# /&,&% $"#&r,! /&" $"&-&"
• S$%!&, &-&" $,*"&! +$$!&"#&" +$.$&&" "!+$$!&"#&") &!"#: &!"#8 &!%* +$.$&&" ,&/& *-*
/!&"& &-&" %!/&+ &+&" +$-!.&"#&" &!r (,!"/&-) +$ &%;r &%&+&" $"#&!. *&, &!r /&r! &%;r
<!+& RH */&r& = RH +$$!&"#&" &+& &-&" &!- /&,&% /!+$r!"
<!+& RH */&r& > RH +$$!&"#&" &+& &-&" &+&" $"&r!+ *&, &*/&r&
K$.$&&" U/&r& (R$.&%!?$
H*!/!%)
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• Moisture content,kering
@R&! &"%&r& +&"/*"(+#) /&.& &%$r!&. %
$r&% &%$r!&. +$r!"#
• Moisture content, basisbasah
@R&! &"%&r& +&"/*"#&" &!r(+#) /&.& &%$r!&. %$r-&/&,
$r&% &%$r!&. &&- (+#)
M!%*r$ C"%$"% () Kandungan air yang terdapat dalam material untuk
satuan massa padatan.
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Equilibrium moisture(X*) :
@M!%*r$ "%$"% ,&/&%&"
+$%!+& ,&/& +"/!!+$$%!&"#&" /$"#&"%$+&"&" ,&r!&. *&,
%$r%$"%*
Bound moisture :
“M!%*r$ "%$"% ,&/&%&" &"# $$r!+&" %$+&"&"*&, +$$%!&"#&" +*r&"#
/&r!,&/& %$+&"&" *&,&!r&" *r"! ,&/&
%$,$r&%*r %$r%$"%*
Unbound moisture@M!%*r$ "%$"% ,&/&
$$r!+&" %$+&"&" +$$%!&"#&" && /$
%$+&"&" *&, &!r&" *r"%$,$r&%*r %$r%$"%*
Free moisture :
@M!%*r$ "%$"% ,&/&%&$r.$!- /!&"/!"# /$"
$*!.!r!* !%*r$ $$&r :
Hanya free moisture yandiuapkan.
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H%$r!!
• P$r!.&+* &%&* !F&% /&r! $*&- !%$ /!&"& $*&!%$ %$r$*% #&#&. *"%*+ +$&.! +$ +$&/&&" $&%&* $$.*"&8 $%$.&- ,$"$& /&r! ,$r*&-&":,$r*&-&" %$r$*% /!-!.&"#+&"
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I".*.$ .!/
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S.*.$ L!*!/
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S.*.$ L!*!/