Tabel 4.13 AFR hasil pengujian dengan bahan bakar premium
P re
miu m
Parameter Performansi
Jumlah Lampu Tiap Lampu 100 Watt
1 2
3 4
5
Putaran rpm 4049,5
4148 4229
4370 4458,5
Daya Watt 114,1
207,495 315,635
415,405 517,635 ṁf kgjam
0,54 0,6
0,648 0,696
0,744 ṁa kgjam
10,087 10,087
10,087 10,087
10,087 AFR
18,679 16,812
15,566 14,493
13,558
4.5.2 AFR yang Dihasilkan Bahan Bakar Biogas
• P = 107,25 watt = 0,10725 kW ⇒ n= 4188,5 rpm ṁf = 1,72 kgjam
V
d
: 95 × 10
−6
�
3
V
c
: 10 × 10
−6
�
3
P
i
= 85 kPa R = 0,287 kJkg.K
T
i
= 333 K
�
�
= �
�
�
�
+ �
�
�. �
�
�
�
= 8595 × 10
−6
+ 10 × 10
−6
0,287 × 333 �
�
= 0,0000934 ��
��� − ����� Maka:
ṁ
�
= �0,0000934
�� ��� − ������
1 ��� �
3600 ���
60 ��� � �
1 �����
2 ��� �
Universitas Sumatera Utara
ṁ
�
= 0,002802 �����
ṁ
�
= 10,087 �����
Sehingga: ��� =
ṁ
�
ṁ
�
��� = 10,087
����� 1,72
����� ��� = 5,86
• P = 207,46 watt = 0,20746 kW ⇒ n= 4238,5 rpm ṁf = 1,86 kgjam
V
d
: 95 × 10
−6
�
3
V
c
: 10 × 10
−6
�
3
P
i
= 85 kPa R = 0,287 kJkg.K
T
i
= 333 K
�
�
= �
�
�
�
+ �
�
�. �
�
�
�
= 8595 × 10
−6
+ 10 × 10
−6
0,287 × 333 �
�
= 0,0000934 ��
��� − ����� Maka:
ṁ
�
= �0,0000934
�� ��� − ������
1 ��� �
3600 ���
60 ��� � �
1 �����
2 ��� �
ṁ
�
= 0,002802 �����
ṁ
�
= 10,087 �����
Universitas Sumatera Utara
Sehingga: ��� =
ṁ
�
ṁ
�
��� = 10,087
����� 1,86
����� ��� = 5,42
• P = 310,5 watt = 0,3105 kW ⇒ n= 4358 rpm ṁf = 2,01 kgjam
V
d
: 95 × 10
−6
�
3
V
c
: 10 × 10
−6
�
3
P
i
= 85 kPa R = 0,287 kJkg.K
T
i
= 333 K
�
�
= �
�
�
�
+ �
�
�. �
�
�
�
= 8595 × 10
−6
+ 10 × 10
−6
0,287 × 333 �
�
= 0,0000934 ��
��� − ����� Maka:
ṁ
�
= �0,0000934
�� ��� − ������
1 ��� �
3600 ���
60 ��� � �
1 �����
2 ��� �
ṁ
�
= 0,002802 �����
ṁ
�
= 10,087 �����
Sehingga: ��� =
ṁ
�
ṁ
�
Universitas Sumatera Utara
��� = 10,087
����� 2,01
����� ��� = 5,02
• P = 407,79 watt = 0,40779 kW ⇒ n= 4428,5 rpm ṁf = 2,13 kgjam
V
d
: 95 × 10
−6
�
3
V
c
: 10 × 10
−6
�
3
P
i
= 85 kPa R = 0,287 kJkg.K
T
i
= 333 K
�
�
= �
�
�
�
+ �
�
�. �
�
�
�
= 8595 × 10
−6
+ 10 × 10
−6
0,287 × 333 �
�
= 0,0000934 ��
��� − ����� Maka:
ṁ
�
= �0,0000934
�� ��� − ������
1 ��� �
3600 ���
60 ��� � �
1 �����
2 ��� �
ṁ
�
= 0,002802 �����
ṁ
�
= 10,087 �����
Sehingga: ��� =
ṁ
�
ṁ
�
��� = 10,087
����� 2,13
����� ��� = 4,74
Universitas Sumatera Utara
• P = 424,74 watt = 0,42474 kW ⇒ n= 3898,5 rpm ṁf = 2,24 kgjam
V
d
: 95 × 10
−6
�
3
V
c
: 10 × 10
−6
�
3
P
i
= 85 kPa R = 0,287 kJkg.K
T
i
= 333 K
�
�
= �
�
�
�
+ �
�
�. �
�
�
�
= 8595 × 10
−6
+ 10 × 10
−6
0,287 × 333 �
�
= 0,0000934 ��
��� − ����� Maka:
ṁ
�
= �0,0000934
�� ��� − ������
1 ��� �
3600 ���
60 ��� � �
1 �����
2 ��� �
ṁ
�
= 0,002802 �����
ṁ
�
= 10,087 �����
Sehingga: ��� =
ṁ
�
ṁ
�
��� = 10,087
����� 2,24
����� ��� = 4,5
Tabel 4.14 AFR hasil pengujian denganbahan bakar Biogas
Universitas Sumatera Utara
B iog
as Parameter Uji
Jumlah Lampu Tiap Lampu 100 Watt
1 2
3 4
5 Putaran rpm
4188,5 4238,5
4358 4428,5
3898,5 Daya Watt
107,25 207,495
310,495 407,79
424,74 ṁf kgjam
1,72 1,86
2,01 2,13
2,24 ṁa kgjam
10,087 10,087
10,087 10,087
10,087 AFR
5,864535 5,423118 5,018408 4,735681 4,503125
4.5.3 Perbandingan AFR yang Dihasilkan Bahan Bakar Premium dengan Biogas