Pengaruh Pencampuran Bahan Bakar Terhadap Performa Sepeda Motor Matic.pdfMarfizal Marfizal
The research conducted in this paper is related to testing the performance of a 4-stroke engine using Pertamax, Pertalite and Pertalite 50% Pertamax 50% fuel. The test was carried out by varying the power from 5000 to 8000 rpm. The performance that will be compared from the three types of fuel is acceleration, speed, power and torque. Tests were carried out using Super Dyno 50L. The results of this test are used to compare the performance of the three types of fuel. In this study, it was found that the use of Pertamax on the Pertamax 4 stroke engine had performance in Pertalite and a mixture of Pertamax usage 50% Pertalite 50%. Judging from its performance for Pertamax, the acceleration value is 0.26% to 0.01%, the speed ranges from 0.54% to 45%, the higher power is 1.82% to 24.04 %, greater torque 6.65% to 25.67%. In general, it can be concluded that Pertamax has a better performance then followed by a mixture of Pertalite 50% Pertamax 50%.
Pengaruh Pencampuran Bahan Bakar Terhadap Performa Sepeda Motor Matic.pdfMarfizal Marfizal
The research conducted in this paper is related to testing the performance of a 4-stroke engine using Pertamax, Pertalite and Pertalite 50% Pertamax 50% fuel. The test was carried out by varying the power from 5000 to 8000 rpm. The performance that will be compared from the three types of fuel is acceleration, speed, power and torque. Tests were carried out using Super Dyno 50L. The results of this test are used to compare the performance of the three types of fuel. In this study, it was found that the use of Pertamax on the Pertamax 4 stroke engine had performance in Pertalite and a mixture of Pertamax usage 50% Pertalite 50%. Judging from its performance for Pertamax, the acceleration value is 0.26% to 0.01%, the speed ranges from 0.54% to 45%, the higher power is 1.82% to 24.04 %, greater torque 6.65% to 25.67%. In general, it can be concluded that Pertamax has a better performance then followed by a mixture of Pertalite 50% Pertamax 50%.
5. Selectionof KaplanTurbine
Specific Speed in
r.p.m.
Turbine type Jump height in m
From 270 to 500 Slow Kaplan 50 to 15
From 500 to 800 Quick Kaplan 15 to 5
From 800 to 1100 Extra-quick Kaplan Less than 5
7. Daya yang dibangkitkan oleh turbin sebesar :
P = ……….( watt )
jadi dalam daya Kw ( kilowatt ) adalah :
P =
dimana : P = daya yang dibangkitkan turbin ( kw )
= rapat massa air ( 1000 Kg/m3 )
g = percepatan gravitasi ( 9,81 m/dtk2 )
Q = kapasitas aliran air ( m3/dtk )
H = head effektif ( m )
Daya yang sebenarnya adalah :
P =
HQg ...
)(
1000
...
kw
HQg
t
HQg
.
1000
...
12. Contoh Turbin yang akan dirancang dirancang didasarkan pada
hasil pengukuran potensi alir dengan data: Kapasitas
aliran (Qd) = 0,07 m3/s, Head kotor (H) = 3,5 m
13. Solusi
discharge Q 0,07 [m³/s]
gross head H 3,50 [m]
hydraulic efficiency ηh 0,90 [-]
water density ρ 999,00 [kg/m³]
acceleration of gravity g 9,81 [m/s²]
Power P 2.161 [W]
net head = (H x ηh) Hn 3,15 [m]
rational speed of the turbine RPM n 950,00 [minˉ¹]
specific speed (in minˉ¹) nq 106,30 [-]
rational speed of the turbine n 15,83 [sˉ¹]
specific hydraulic energy of machine =
(Hn x g) E 30,90 [J/kg]
specific speed (in sˉ¹) nQE 0,32 [-]
runner diameter De 0,206 [m]
hub diameter Di 0,113 [m]
