Hydropower: load rate penstocks

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Hydropower: load rate penstocks




by Christophe » 27/03/16, 14:47

Some figures on hydroelectric power in France about mountain penstocks.

Source: http://sitepasite.free.fr/montagne/info_4_pique.html

I share them here because I had a little trouble finding them (nothing on wiki for example on the charging rate per station)

carte_luchon_hydroelectric.jpg


Portillon power station (1150m)
Commissioned 1941
Head height on gate side 1420m (highest in France), flow 5m³ / s, power 55MW, annual output 54GWh
Drop height Blue Lake side 1120m, flow 4.6m³ / s, power 40MW, annual production 14GWh

Prat-Long pumping station (2232m) (pumps water from Blue Lake to Portillon Lake)
Commissioned 1946
Delivery head 280m, Delivery rate 2.2m³ / s
Annual flow pumped 11 hm³
Annual consumption 10 GWh

Central of the Upper Pique (860m)
Commissioned 1919
Drop height 232m, flow 6.5m³ / s, power 10.8 MW, annual production 42 GWh

Central of the Lower Pique (660m)
Commissioned 1918
Drop height 171m, flow 5.2m³ / s, power 7.2 MW, annual production 37 GWh

Lake Oo powerhouse (640m)
Commissioned 1921
Fall height 802m, flow rate 4.75m³ / s, power 30MW, annual output 62GWh

Portillon Lake (2566m)
Natural lake enhanced by a dam 22m high and 205m long
Reservoir volume 16.8 hm³, annually 18 hm³ are turbinated and 11 hm³ injected by pumping from Lac Bleu

Lake Oo (1500m)
Natural lake enhanced by a dam 11m high and 66m long
Reservoir volume 13 hm³, annually 33 hm³ are turbinated


We can therefore estimate the load factors for each of these examples:

power 55MW, annual production 54GWh or 54 / 000 = 55h per year at nominal power
power 40MW, annual production 14GWh or 14 / 000 = 40h
power 10.8 MW, annual production 42 GWh or 42 / 000 = 10.8h
power 7.2 MW, annual production 37 GWh or 37 / 000 = 7.2h
power 30MW, annual production 62GWh i.e. 62 / 000 = 30h

Either in% of an hour at nominal power / hours of the year:
982 / 8760 = 11.2%
350 / 8760 = 4%
3888 / 8760 = 44.4%
5140 / 8760 = 58.7%
2067 / 8760 = 23.6%

Average = 28.4% (so not too bad)

We therefore see that the load rate is very variable, necessarily dependent on the hydraulic resource but also may be on local demand (hydraulic plants are currently used to compensate for peak current demand)
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Re: Hydroelectricity: charge rate of penstocks




by Flytox » 28/03/16, 18:40

[Off-topic mode ON]
Excuse me totof but ...
Hydroelectric dam or not, the area is sublime ....
https://www.google.fr/search?q=lac+d%27 ... 1&dpr=1.25

Lake Oo.

oo.jpg


[Off-topic mode OFF]
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