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]
