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hydropower (+ (storage (99% global), frequency management, black start use…
hydropower
+
storage (99% global)
frequency management
black start use
η~70-87%
largest: 22.5GW Three Gorges Gam
no GHG except construction
quick start
control of flooding
-
flooding --> people, biodiversity
++£
finance costs (final cost*2)
++ concrete
very long term projects
high speed
Francis turbine
high speed
++ head --> +efficient
-3 head ++ output
++ used
pelton turbine
++ head & - output
++ efficient for + head
low speed
Bulb turbine
generator in bulb
easy to use
-1 head & output
Kaplan turbine
-2 head & output
adjustable blades --> + efficient
other possibilities
river dam (small)
no storage
-- env impact
tidal
power formula
P=Qϱghη