AUDIT ENERGI

Tugas 2

Dosen: Rispiandi, ST, MT

Nama : Nurul Fathatun

NIM : 121424023

Kelas : 3A-TKPB

PROGRAM STUDI DIPLOMA IV TEKNIK KIMIA PRODUKSI BERSIH

JURUSAN TEKNIK KIMIA

POLITEKNIK NEGERI BANDUNG

2015

Tanggal Penugasan : 19 Maret 2015

Tanggal Pengumpulan : 24 Maret 2015

Boiler

F=10500 TF =30°C40°C50°C60°C70°C

S=10 ton/jam40 bar300°CHs= 2960,7

BD=5% x S=5% x 10000=500 kg/jam40 bar, cair jenuhHBD= 1087,31

No. 1

Bahan bakar : Solar, ɳsolar = 75%

Untuk T=30°CHF = 125,79 KJ/Kg

QBoiler = [ (S x Hs) + (BD x HBD ) ] – (F x HF)

= [ (10000 Kgjam

x 2960,7 KJKg

) + (500 Kgjam

x 1087,31 KJKg

) ] – (10500 K gjam

x 125,79

KJKg

)

= 30150655 KJjam

- 1320795 KJjam

= 28829860 KJjam

QSolar = QBoiler

MSolar x LHVSolar x ɳSolar = QBoiler

MSolar = QBoiler

LHV Solar x ɳSolar

= 28829860

KJjam

41032,6KJKg

x 0,75

= 936,81 Kgjam

VSolar = M Solar

ρSolar

= 936,81

Kgjam

0,88KgLiter

= 1064,55 Literjam

Cost = Rp. 6400/liter x 1064,55 Literjam

= Rp. 6.813.120,-/jam

Rp .tonsteam

= Rp .6.813 .120/ jam10ton / jam

= Rp .6 81.312 ,− ¿

ton steam¿

Untuk T= 40°C, 50°C, 60°C, 70°C ada dalam table berikut:

Suhu Umpan

(°C)

HF

(KJ/Kg)QBoiler

(KJ/jam)MSolar

(Kg/jam)VSolar

(Liter/jam)Cost (Rupiah/jam)

Rp./ton steam

30 125,79 28829860 936,81 1064,55 Rp. 6.813.120/jam Rp. 681.31240 167,57 28391170 922,55 1048,35 Rp. 6.709.440/jam Rp. 670.94450 209,33 27952690 908,31 1032,16 Rp. 6.605.824/jam Rp. 660.582,460 251,13 27511690 893,97 1015,88 Rp. 6.501.632/jam Rp. 650.163,270 292,98 27074365 879,76 999,73 Rp. 6.398.272/jam Rp. 639.827,2

25 30 35 40 45 50 55 60 65 70 75610000

620000

630000

640000

650000

660000

670000

680000

690000

681312

670944

660582.4

650163.2

639827.2

Grafik Pengaruh Suhu Umpan Terhadap Cost Per Ton Steam

Suhu Umpan (°C)

Rp./

ton

stea

m

Boiler

HF= 125,8 TF=30°CVariasi kualitas air (SiO2)=15 ppm25 ppm40 ppm55 ppm70 ppm

S=10 ton/jam40 bar300°CHs= 2960,7

BD?SiO2 = 250 ppm40 bar, cair jenuhHBD= 1087,31

No. 2

Bahan bakar : Solar, ɳsolar = 75%

Untuk kadar SiO2 = 15 ppm

F = BD + SF . XF = BD . XBD + S . Xs

F (15) = BD (250) + 10000 (0)

F = 25015

BD

F = 16,67 BD

F = BD + S16,67 BD= BD + 1000015,67 BD= 10000BD = 638,16 kg/jam

F = BD + S= 638,16 kg/jam + 10000 kg/jam= 10638,16 kg/jam

QBoiler = [ (S x Hs) + (BD x HBD ) ] – (F x HF)

= [ (10000 Kgjam

x 2960,7 KJKg

) + (638,16 Kgjam

x 1087,31 KJKg

) ] – (10638,16 Kgjam

x

125,8 KJKg

)

= 28962597,22 KJjam

QSolar = QBoiler

MSolar x LHVSolar x ɳSolar = QBoiler

MSolar = QBoiler

LHV Solar x ɳSolar

= 28962597,22

KJjam

41032,6KJKg

x 0,75

= 941,12 Kgjam

VSolar = M Solar

ρSolar=

941,12Kgjam

0,88KgLiter

= 1069,45 Literjam

Cost = Rp. 6400/liter x 1069,45 Literjam

= Rp. 6.844.480,-/jam

Rp .tonsteam

= Rp .6.844 .48 0 / jam10 ton/ jam

= Rp .6 84.448 ,− ¿tons team

¿

Untuk kadar SiO2 = 25 ppm, 40 ppm, 55 ppm, 70 ppm ada dalam table berikut:

kadar SiO2

(ppm)

Blow Down

(Kg/jam)

Feed (Kg/jam)

QBoiler

(KJ/jam)MSolar

(Kg/jam)VSolar

(Liter/jam)Cost (Rupiah/jam)

Rp./ton steam

15 638,16 10638,16 28962597,22 941,12 1069,45 Rp. 6.844.480/jam Rp. 684.44825 1111,11 11111,11 29417343,38 955,90 1086,25 Rp. 6.952.000/jam Rp. 695.20040 1904,76 11904,76 30180445,79 980,69 1114,42 Rp. 7.132.288/jam Rp. 713.228,855 2824,85 12824,85 31065121,52 1009,44 1147,09 Rp. 7.341.376/jam Rp. 734.137,670 3891,05 13891,05 32090283,49 1042,75 1184,95 Rp. 7.583.680/jam Rp. 758.368

10 20 30 40 50 60 70 80640000

660000

680000

700000

720000

740000

760000

780000

684448695200

713228.8

734137.6

758368

Grafik Pengaruh Konsentrasi SiO2 Terhadap Cost Per Ton Steam

Konsentrasi SiO2 (ppm)

Rp./

ton

stea

m

Boiler

HF= 125,8 TF=30°C

S=10 ton/jam40 bar300°CHs= 2960,7

BD=5% x S=5% x 10000=500 kg/jam40 bar, cair jenuhHBD= 1087,31

No. 3

Variasi bahan bakar:

Solar, LHVsolar=9800 kcal/kg = 41032,6 KJ/kg, ɳsolar=75%, ρsolar=0,88 kgliter

,

Harga=Rp.6400/liter Gas, ɳgas=80%, Harga= S 10/MMBtu, 1 MMBtu=1000000 Btu, S 1= Rp. 13.000,- Batu bara, LHVbatu bara=6000 kcal/kg = 25122 kJ/kg, ɳbatu bara=65%, Harga=Rp.1000/kg Bagasse, LHVBagasse=2000 kcal/kg = 8374 kJ/kg, ɳBagasse=60%, Harga=Rp.200 /kg

QBoiler = [ (S x Hs) + (BD x HBD ) ] – (F x HF)

= [ (10000 Kgjam

x 2960,7 KJKg

) + (500 Kgjam

x 1087,31 KJKg

) ] – (10500 Kgjam

x 125,8 KJKg

)

= 28829755 KJjam

Untuk Bahan Bakar SolarQSolar = QBoiler

MSolar x LHVSolar x ɳSolar = QBoiler

MSolar = QBoiler

LHV Solar x ɳSolar

= 28829755

KJjam

41032,6KJKg

x 0,75

= 936,80 Kgjam

VSolar = M Solar

ρSolar

= 936,80

Kgjam

0,88KgLiter

= 1064,55 Literjam

Cost = Rp. 6400/liter x 1064,55 Literjam

= Rp. 6.813.150,-/jam

Rp .tonsteam

= Rp .6.813 .150/ jam10ton / jam

= Rp .6 81.315 ,− ¿tons team

¿

Untuk Bahan Bakar GasQGas = QBoiler

QGas x ɳGas = QBoiler

QGas = QBoiler

ɳGas

= 28829755

KJjam

0,80

= 36037193,75 kJ/jam x |0,948Btu1kJ | x | 1 MMBtu

1000000Btu|= 34,16 MMBtu/jam

Cost = S 10/MMBtu x 34,16 MMBtujam

= S 341,6/jam= S 341,6/jam x Rp. 13.000= Rp. 4.440.800,-/jam

Rp .tonsteam

= Rp .4.440 .800 / jam10 ton/ jam

= Rp .444.080 ,− ¿

ton s team¿

Untuk Bahan Bakar Batu BaraQBatu bara = QBoiler

MBatu bara x LHVBatu bara x ɳBatu bara = QBoiler

MBatu bara = QBoiler

LHV Batubara xɳbatubara

= 28829755

KJjam

25122KJKg

x 0,6 5

= 1765,52 Kgjam

Cost = Rp. 1000/kg x 1765,52 Kgjam

= Rp. 1.765.520,-/jam

Rp .tonsteam

= Rp .1.765 .520/ jam10ton / jam

= Rp .176.552 ,− ¿ton s team

¿

Untuk Bahan Bakar Bagasse

QBagasse = QBoiler

MBagasse x LHVBagasse x ɳBagasse = QBoiler

MBagasse = QBoiler

LHV Bagasse x ɳBagasse

= 28829755

KJjam

8374KJKg

x 0,60

= 5737,94 Kgjam

Cost = Rp. 200/kg x 5737,94 Kgjam

= Rp. 1.147.588,-/jam

Rp .tonsteam

= Rp .1.147 .588/ jam10ton / jam

= Rp .1 14 .758 ,8 ,− ¿ton s team

¿

Untuk jenis bahan bakar lain ada dalam table berikut:

Jenis Bahan Bakar

MBahan bakar (Kg/jam)VSolar

(Liter/jam)Cost (Rupiah/jam)

Rp./ton steam

Solar 936,80 1064,55 Rp. 6.813.150/jam Rp. 681.315 Gas QGas = 34,16 MMBtu/jam - Rp. 4.440.800/jam Rp. 444.080

Batu Bara 1765,52 - Rp. 1.765.520/jam Rp. 176.552Bagasse 5737,94 - Rp. 1.147.588/jam Rp. 114.758,8

Solar Gas Batu Bara Bagasse0

100000200000300000400000500000600000700000800000

681315

444080

176552114758.8

Grafik Pengaruh Jenis Bahan Bakar Terhadap Cost Per Ton Steam

Jenis Bahan Bakar

Rp./

ton

stea

m