AFR yang Dihasilkan Bahan Bakar Premium

� � = � � � � + � � �. � � Dimana: � � = tekanan udara masuk silinder � � = temperatur udara masuk silinder � = konstanta udara

4.5.1 AFR yang Dihasilkan Bahan Bakar Premium

• P = 114,1 Watt = 0,1141 kW ⇒ n= 4049,5 rpm ṁf = 0,54 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 ����� 0,54 ����� ��� = 18.68 • P = 207,495watt = 0,207495 kW ⇒ n= 4148 rpm ṁf = 0,6kgjam 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 ����� 0,6 ����� ��� = 16,81 • P = 315,635watt = 0,315635 kW ⇒ n= 4229 rpm ṁf = 0,648kgjam 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 ����� 0,648 ����� ��� = 15,57 Universitas Sumatera Utara • P = 415,4watt = 0,4154 kW ⇒ n= 4370 rpm ṁf = 0,696 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 ����� 0,696 ����� ��� = 14,5 • P = 517,63watt = 0,51763 kW ⇒ n= 4458,5 rpm ṁf = 0,744 kgjam Universitas Sumatera Utara 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 ����� 0,744 ����� ��� = 13,5578 Universitas Sumatera Utara 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