Efisiensi termal yang dihasilkan bahan bakar E100  P = 200 watt = 0,200 kW Efisiensi termal yang dihasilkan bahan bakar P50 + E50  P = 202,5 watt = 0,2025 kW

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4.4.2 Efisiensi termal yang dihasilkan bahan bakar E100  P = 200 watt = 0,200 kW

⇒ n= 4160 rpm ṁf = 0,864 kgjam LHV = 23671,83 kjkg η b = � � ṁ � . ���. η � � 3600 η b = 0,200 0864.23671,83.0,97 � 3600 η b = 0,036292 η b = 3,36292  P = 407,5 watt = 0,4075 kW ⇒ n= 4200 rpm ṁf = 0,947368 kgjam LHV = 23671,83 kjkg η b = � � ṁ � . ���. η � � 3600 η b = 0,4075 0,947368.23671,83.0,97 � 3600 η b = 0,067438 η b = 6,7438  P = 625 watt = 0,625 kW ⇒ n= 4250 rpm ṁf = 01,102041 kgjam LHV = 23671,83 kjkg η b = � � ṁ � . ���. η � � 3600 η b = 0,625 1,102041.23671,83.0,97 � 3600 η b = 0,088916 η b = 888916  P = 636,75watt = 0,63675 kW ⇒ n= 4128 rpm ṁf = 1,2413379 kgjam LHV = 23671,83 kjkg η b = � � ṁ � . ���. η � � 3600 Universitas Sumatera Utara 87 η b = 0,63675 1,2413379 .23671,83.0,97 � 3600 η b = 0,08042 η b = 8,042  P = 657,72 watt = 0,65772 kW ⇒ n= 4051 rpm ṁf = 1,285714 kgjam LHV = 23671,83kjkg η b = � � ṁ � . ���. η � � 3600 η b = 1,002 1,285714.2361,83.0,97 � 3600 η b = 0,080202 η b = 8,0202  P = 656 watt = 0,656 kW ⇒ n= 3862 rpm ṁf = 1,032 kgjam LHV =23671,83 kjkg η b = � � ṁ � . ���. η � � 3600 η b = 00,656 1,032 .41466.0,97 � 3600 η b = 0,07809 η b = 0,07809 Tabel 4.14 Efisiensi thermal hasil pengujian menggunakan bahan bakar E100 Bahan Bakar Paramet er Perform ansi Jumlah beban 100 Watt 2 4 6 8 10 12 E 100 n rpm 4160 4200 4250 4128 4051 3862 P Watt 200 407,5 625 636,7 5 657,7 2 656 LHV kJkg 23671 ,83 23671 ,83 23671 ,83 23671 ,83 23671 ,83 23671 ,83 ṁf kgjam 0,864 0,947 368 1,102 041 1,241 379 1,285 714 1,317 073 η b 0,036 0,067 0,088 0,080 0,080 0,078 Universitas Sumatera Utara 88 292 438 916 42 204 09 4.4.3 Efisiensi termal yang dihasilkan bahan bakar P50 + E50  P = 202,5 watt = 0,2025 kW ⇒ n= 4280 rpm ṁf = 0,824427 kgjam LHV = 23824,89 kjkg η b = � � ṁ � . ���. η � � 3600 η b = 0,2025 0,824427.23824,89.0,97 � 3600 η b = 0,038262 η b = 3,8262  P = 406,62 watt = 0,40662 kW ⇒ n= 4329 rpm ṁf = 0,907563 kgjam LHV = 23824,89 kjkg η b = � � ṁ � . ���. η � � 3600 η b = 0,40662 0,907563.23824,89.0,97 � 3600 η b = 0,069793 η b = 6,9793  P = 620 watt = 0,620 kW ⇒ n= 4352rpm ṁf = 1,08 kgjam LHV = 23824,89 kjkg η b = � � ṁ � . ���. η � � 3600 η b = 0,620 1,08.23824,89.0,97 � 3600 η b = 0,089427 η b = 0,089427  P = 820 watt = 0,820 kW ⇒ n= 4370 rpm ṁf = 1,2 kgjam LHV = 23824,89 kjkg Universitas Sumatera Utara 89 η b = � � ṁ � . ���. η � � 3600 η b = 0,820 1,2.23824,89.0,97 � 3600 η b = 0,106447 η b = 10,6447  P = 836 watt = 0,836 kW ⇒ n= 4169 rpm ṁf = 1,255814 kgjam LHV = 23824,89 kjkg η b = � � ṁ � . ���. η � � 3600 η b = 0,836 1,255814.23824,89.0,97 � 3600 η b = 0,1037 η b = 1,037  P = 834,2 watt = 0,8342 kW ⇒ n= 4024 rpm ṁf = 1,301205 kgjam LHV = 23824,89 kjkg η b = � � ṁ � . ���. η � � 3600 η b = 0,8342 1,30120.23824,89.0,97 � 3600 η b = 0,099868 η b = 9,9868 Tabel 4.15 Efisiensi thermal pengujian menggunakan bahan bakar P50+E50 Bahan Bakar Paramet er Perform ansi Jumlah beban lampu 100 Watt 2 4 6 8 10 12 P 50 + E50 n rpm 4280 4329 4352 4370 4169 4024 P Watt 202,5 406,6 2 620 820 836 834,2 LHV kJkg 23824 ,89 23824 ,89 23824 ,89 23824 ,89 23824 ,89 23824 ,89 ṁf kgjam 0,824 427 0,907 563 1,08 1,2 1,255 814 1,301 205 η b 0,038 0,069 0,089 0,106 0,103 0,099 Universitas Sumatera Utara 90 262 793 427 447 7 868 4.4.4 Efisiensi termal yang dihasilkan bahan bakar P50 + E 5097,5 + H2,5