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4.1 Nilai Kalor Bahan Bakar
Analisa percobaan dilakukan dengan mengunakan rumus sebagai berikut:
Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
Keteranga : T
1
= Suhu air pendingin sebelum dinyalakan
o
C T
2
= Suhu air pendingin setelah penyalaan
o
C C
v
= Panas jenis bom kalorimeter 73529,6 kJkg
o
C Kenaikan suhu akibat kawat menyala = 0,05
o
C
LHV = HHV – 3240 kJkg
4.1.1 Analisa Nilai Kalor Bahan Bakar Serabut Kelapa Sawit Murni a. Analisa percobaan 1
Diketahui : T
1
= 26,13
o
C T
2
= 26,35
o
C C
v
= 73529,6 kJkg
o
C
Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 26,35 – 26,13 – 0,05 x 73529,6
HHV = 12500,032 kJkg
LHV = HHV – 3240 kJkg
LHV = 12500,032 – 3240
LHV = 9260,032 kJkg
b. Analisa percobaan 2
Diketahui : T
1
= 26,49
o
C T
2
= 26,74
o
C C
v
= 73529,6 kJkg
o
C
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Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 26,74 – 26,49 – 0,05 x 73529,6
HHV = 14705,92 kJkg
LHV = HHV – 3240 kJkg
LHV = 14705,92 – 3240
LHV = 11465,92 kJkg
c. Analisa percobaan 3
Diketahui : T
1
= 26,91
o
C T
2
= 27,18
o
C C
v
= 73529,6 kJkg
o
C
Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 27,18 – 26,91 – 0,05 x 73529,6
HHV = 16176,512 kJkg
LHV = HHV – 3240 kJkg
LHV = 16176,512 – 3240
LHV = 12936,512 kJkg
d. Analisa percobaan 4
Diketahui : T
1
= 27,32
o
C T
2
= 27,58
o
C C
v
= 73529,6 kJkg
o
C Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 27,58 – 27,32 – 0,05 x 73529,6
HHV = 15441,216 kJkg
LHV = HHV – 3240 kJkg
LHV = 15441,216 – 3240
LHV = 12201,216 kJkg
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e. Analisa percobaan 5
Diketahui : T
1
= 27,76
o
C T
2
= 28,01
o
C C
v
= 73529,6 kJkg
o
C Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 28,01 – 27,76 – 0,05 x 73529,6
HHV = 14705,92 kJkg
LHV = HHV – 3240 kJkg
LHV = 14705,92 – 3240
LHV = 11465,92 kJkg
Tabel 4.1 Hasil analisa nilai kalor bahan bakar serabut kelapa sawit murni No
T
1 o
C T
2 o
C HHV kJkg
LHV kJkg 1
26.13 26.35
12500.032 9260.032
2 26.49
26.74 14705.92
11465.92 3
26.91 27.18
16176.512 12936.512
4 27.31
27.58 15441.216
12201.216 5
27.76 28.01
14705.92 11465.92
Rata-rata 14705.92
11465.92 Maka rata-rata nilai HHV = 14705,92 kJkg
HHV = 3529,42 Kkalkg Maka rata-rata nilai LHV = 11465,92 kJkg
LHV = 2751,82 Kkalkg
4.1.2 Analisa Nilai Kalor Bahan Bakar Cangkang Kelapa Sawit Murni a. Analisa percobaan 1
Diketahui : T
1
= 26,71
o
C T
2
= 27,08
o
C C
v
= 73529,6 kJkg
o
C
Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
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HHV = 27,08 – 26,71 – 0,05 x 73529,6
HHV = 23529,472 kJkg
LHV = HHV – 3240 kJkg
LHV = 23529,472 – 3240
LHV = 20289,472 kJkg
b. Analisa percobaan 2
Diketahui : T
1
= 27,24
o
C T
2
= 27,61
o
C C
v
= 73529,6 kJkg
o
C
Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 27,61 – 27,24 – 0,05 x 73529,6
HHV = 23529,472 kJkg
LHV = HHV – 3240 kJkg
LHV = 23529,472 – 3240
LHV = 20289,472 kJkg
c. Analisa percobaan 3
Diketahui : T
1
= 27,82
o
C T
2
= 28,19
o
C C
v
= 73529,6 kJkg
o
C
Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 28,19 – 27,82 – 0,05 x 73529,6
HHV = 23529,472 kJkg
LHV = HHV – 3240 kJkg
LHV = 23529,472 – 3240
LHV = 20289,472 kJkg
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d. Analisa percobaan 4
Diketahui : T
1
= 28,28
o
C T
2
= 28,66
o
C C
v
= 73529,6 kJkg
o
C Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 28,66 – 28,28 – 0,05 x 73529,6
HHV = 24264,768 kJkg
LHV = HHV – 3240 kJkg
LHV = 24264,768 – 3240
LHV = 21024,768 kJkg
e. Analisa percobaan 5
Diketahui : T
1
= 28,77
o
C T
2
= 29,15
o
C C
v
= 73529,6 kJkg
o
C Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 29,15 – 28,77 – 0,05 x 73529,6
HHV = 24264,768 kJkg
LHV = HHV – 3240 kJkg
LHV = 24264,768 – 3240
LHV = 21024,768 kJkg
Tabel 4.2 Hasil analisa nilai kalor bahan bakar cangkang kelapa sawit murni No
T
1 o
C T
2 o
C HHV kJkg
LHV kJkg 1
26.71 27.08
23529.472 20289.472
2 27.24
27.61 23529.472
20289.472 3
27.82 28.19
23529.472 20289.472
4 28.28
28.66 24264.768
21024.768 5
28.77 29.15
24264.768 21024.768
Rata-rata 23823.5904
20583.5904
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Maka rata-rata nilai HHV = 23823,5904 kJkg HHV = 5717,66 Kkalkg
Maka rata-rata nilai LHV = 20583,5904 kJkg LHV = 4940,06 Kkalkg
4.1.3 Analisa Nilai Kalor Bahan Bakar Serabut 75 + Cangkang 25 Kelapa Sawit
a. Analisa percobaan 1
Diketahui : T
1
= 26,93
o
C T
2
= 27,27
o
C C
v
= 73529,6 kJkg
o
C
Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 27,27 – 26,93 – 0,05 x 73529,6
HHV = 21323,584 kJkg
LHV = HHV – 3240 kJkg
LHV = 21323,584 – 3240
LHV = 18083,584 kJkg
b. Analisa percobaan 2
Diketahui : T
1
= 27,44
o
C T
2
= 27,78
o
C C
v
= 73529,6 kJkg
o
C
Nilai panas HHV = T
2
- T
1
- 0,05 x C
v
HHV = 27,78 – 27,44 – 0,05 x 73529,6
HHV = 21323,584 kJkg
LHV = HHV – 3240 kJkg
LHV = 21323,584 – 3240
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LHV = 18083,584 kJkg
c. Analisa percobaan 3