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BAB V

TUGAS KHUSUS

EVALUASI KINERJA TURBIN GAS

BERDASARKAN ANALISIS THERMAL

DATA HASIL PENGAMATAN

Flow rate gas alam masuk burner : 10037,! mmbtu"#a$

Tekanan : !! Bar

Tem%eratur : !70&

U#ara masuk kom%resor : 300&

U#ara keluar kom%resor : 300,0&

Tekanan : ',! Bar

Gas alam masuk burner

Heat(ng Value : 111),1!* btu"+t3

nerg$ rate : 10037,! mmBtu"#a$

Tabel 5.1 Komposisi Gas Alam

Kom%onen - Volume

He.ane, &*H1 0,3)0/ro%ane, &3H) 3,11'

so Butne, (2&H10 0,*0'!

ormal, n2&H10 0,7)0

so /entane, (2&H1! 0,31*ormal /entane, n2&H1! 0,1*73

4etane, &H ),1*17

tane, &!H* ,'310(trogen, ! 1,0)*'

&arbon #(o.(#e, &5!

3,1!*Total 100 -

I. Pe!i"#$%a$ Nea&a Massa '

6(ketau(:

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nerg$ Flow 8ate :

: 9 1),!!)333 mmbtu"

9 1)!!)33,3 btu"

Heat(ng alue gas : 111),1!* btu"+t3

Volumetr(; Gas :

: 9 370!,!3 +t3"

a< 4eng(tung kom%os(s( gas alam masuk burner :

/ 9 !! Bar 9 !1,71 atmT 9 !7o& 9 0,*o8

V 9 370!,!3 +t3"r

Bas(s : 1 our o%erat(on

n 9

9

9 0,7) . 10!3,'*1

9 1'!*1,)) lbmol .

9 )73,3*)707 kmol"

Tabel 5.( Komposisi Gas Mas#) B#$e

Kom%onen - Kmol B4 Kg

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&*H1 0,3)0 30,17 )* !*1,)!

&3H) 3,11' !7!,00 11')',''!(2&H10 0,*0'! 3,!1* ) 30)*,!0

n2&H10 0,7)0 *,31 ) 37)',7!

(2&H1! 0,31* !7,*' 7! 1'),'

n2&H1! 0,1*73 1,*1 7! 10!,!!)&H ),1*17 731,)30 1* 117*!',!)7

&!H* ,'311 1),0'' 30 1!,'73! 1,0)*' ',' !) !*),!

&5! 3,1!* 30*,)3' 1300,)'7

Total 100 )73,3*' 173)0,))0

1.1 Me$%!i"#$% *("eoi"is pemba)aa$ semp#$a '

&*H1 = ', 5! * &5! = 7 H!5

30,17 !)),'7 1)!,'' !1!,'1*

&3H) = 5! 3 &5! = H!5!7!,'' 13*!,'' )17,'' 10)','''

&H10 = *, 5! &5! = H!53,!1 3,'03 !1!,)*3 !**,07'

&H10 = *, 5! &5! = H!5*,30 !,713 !*1,3*! 3!*,70!

&H1! = ) 5! &5! = * H!5!7,*' !!0,1 137,) 1*,13

&H1! = ) 5! &5! = * H!51,*13 11*,'1! 73,07! )7,*)*

&H = ! 5! &5! = ! H!5731,)30 1703,**1 731,)30 1703,**1

&!H* = 3, 5! ! &5! = 3 H!51),0'' 1)13,37 103*,1') 1,!'7

Tabel 5.+ Tab#lasi Gas Hasi Pemba)aa$ De$%a$ *("eoi"is

Kom%onenKmol 5! &5! H!5

&*H1 30,17 !)),'7 1)!,'' !1!,'1*&3H) !7!,'' 13*!,'' )17,'' 10)','''

(2 &H10 3,!1* 3,'03 !1!,)* !**,07'

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n2 &H10 *,30 !,713* !*1,3*! 3!*,703

(2 &H1! !7,*' !!0,1 137,) 1*,13

n2 &H1! 1,*1 11*,'1 73,071 )7,*)*&H 731,)31 1703,**1 731,)30 1703,**1

&!H* 1),0'' 1)13,37 103*,1') 1,!'7

Total )73,3*' 1'!7*,* 10073,1*) 1)0*,7

1.( me$%!i"#$% #,aa mas#) b#$e

5!teor(t(s 9 1'!7*,* kmol

U#ara teor(t(s 9 1"0,!1 . 1'!7*,* 9 '17'3>07 kmol

U#ara masuk burner ?300- e.;ess< 9 3?'17'3>07< kmol 9!737'>!!! kmol

5! 9 0,!1 . !737'>!!!7 kmol 9 7)!'>*37 kmol 9 1)0)>37) kg

! 9 0,7' . !737'>!!!7 kmol 9 !17'>)* kmol 9 *0'13))>0 kg

1.+ me$%!i"#$% *()el#a b#$e

5!keluar burner 9 5! masuk burner 2 5!bereaks(

9 7)!'>*3*) kmol 2 1'!7*,' kmol

9 3)3>0'1!1 kmol

9 1!33*'),'1)7! kg

1.- me$%!i"#$% N()el#a b#$e

!keluar burner 9 !#ar( u#ara = !#ar( gas alam

9 !17'>)* kmol ',' kmol

9 !17*>31 kmol

9 *0'0*>)) kg

1.5 me$%!i"#$% /*( )el#a b#$e

&5! keluar burner 9 &5! as(l reaks( = &5! #ar( gas alam

910073,1*' kmol = 30*,)3' kmol

9 103)0>007 kmol 9 *7!0>31 kg

1.0 me$%!i"#$% H(* )el#a b#$e '

H!5 as(l %embakaran 9 1)0*,7kmol

9 3313!1,7! kg

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Tabel 5.- Komposisi Gas Kel#a B#$e

Kom%onen Kmol - mol Kg

&5! 103)0>007 3,*0 *7!0>31

5! 3)3>0'1 13,!0 1!33*'),'1'! !17*>31 7*,370 *0'0*>)7H!5 1)0*,7 *,70 3313!1,7!

Total !)'),3)3 100 )117)7,**

Tabel 5.5 Re)api"#lasi Nea&a Massa Sep#"a B#$e

/UT 5UT/UT

Kom%onen Kmol Kg Kom%onen Kmol Kg

&*H1 30,17 !*1,)! &5! 103)0>007 *7!0>31

&3H) !7!,'' 11')',''! 5! 3)3>0'1 1!33*'),'1'

(2&H10 3,!1* 30)*,!0 ! !17*>31 *0'0*>)7n2&H10 *,30 37)',7! H!5 1)0*,7 3313!1,7!

(2&H1! !7,*' 1'),'

n2&H1! 1,*1 10!,!!)&H 731,)31 117*!',!)7

&!H* 1),0'' 1!,'73

! !17*>31 !*),!

&5! 30*,)3)* 1300,)'7

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5! 7)!'>*37 1)0)>37)

Total )117)7,** )117)7,**

II. Pe!i"#$%a$ Nea&a E$e%i

Tem%erature re+eren;e : !0&

1.Hea"i$% al#e %as alam 2 370!,!3 +t3" . 111),1!* btu"+t3

9 1)!!)33,3 Btu 9 103'!'10 Kkal

(. Se$sible e$"!alp3 %as mas#) b#$e

Tem%eratur gas alam 9 !7 0&9 300 0k

Tabel 5.0 Se$sible E$"!a3 Gas Mas#) B#$e

Kom%onen Kmol &% ?k;al"kmol0&< @T ?0&< ?k;al31 *,'*1 ! 303007,1*

&5! 30*,)3)* ),)' ! ),0

U#ara !737',!!! *,'73 '*010'*>7Total !)11,'1 1!7'10>307

(.- Se$sible E$"alpi Gas )el#a B#$e

Tem%eratur gas masuk burner?T1< 9 300,0&

Tem%eratur gas keluar burner?T!< 9 )5&

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Cp ntergral 9

!

1 7'0n2&H10 3173,330 Heat loss ra#(as( koneks(

(2&H1! 1!*3,7 Heat absorb

n2&H1! *)0,733&H 1!7,70)

&!H* 1310,)3

! 303007,1*

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&5! ),0

U#ara '*010'*>7

Total 11)1))00,3 Total 3'*033,*