snowy hydro 2.0

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Created by

myusernam > 9 months ago, 12 Nov 2024

myusernam

QLD

6154 posts

12 Nov 2024 9:59am

Just watching the four corners ep on snowy hydro 2.0
former powerlink ceo says the 27klm of tunnels and underground cavern as large as the titanic 800m below surface means the cost simply doesn't stack up. Checks out to me

Why do they need to go underground? Can't they have pipes on the surface? Pipes will be to big? More smaller pipes. So long as both ends are underwater it doesn't matter if the pipes need to go uphill for a bit. These guys never heard of a syphon? Harrow?

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Mr Milk

NSW

3120 posts

12 Nov 2024 5:14pm

It can't be above ground because it is in the middle of a national park

FormulaNova

15090 posts

12 Nov 2024 6:07pm

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Mr Milk said..
It can't be above ground because it is in the middle of a national park

This is why China can do so many cool things. Who needs to consult the public when you want to do stuff?

myusernam

QLD

6154 posts

13 Nov 2024 7:54am

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Mr Milk said..
It can't be above ground because it is in the middle of a national park

Paint the pipes green or camo. Make an easement. Have wildlife crossings every 100m or so. Publicky flog greenies who appose. Actually lets just flog the greenies and lefties anyway

Carantoc

7194 posts

13 Nov 2024 9:00am

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myusernam said..
These guys never heard of a syphon? Harrow?

You may want to to consult Daniel Bernoulli if you can't get hold of Harrow.

bjw

QLD

3687 posts

13 Nov 2024 2:38pm

The Green Party protested to stop more Hydro back in the 70's. And won.

They were responsible for more coal and less renewables.

Mr Milk

NSW

3120 posts

13 Nov 2024 4:18pm

You talking about the Franklin dam in Tasmania?
The plan that Tassie hydro had was for a 180MW generator. That's less than a single unit in most coal plants, so it's a bit of a stretch to claim that the success of the Greens in blocking it was responsible for more coal power.

Ian K

4164 posts

13 Nov 2024 1:39pm

Might be a pressure vs. cost consideration. There's a 700 metres head. If the head followed the terrain a whole lot of it would be under pressure with high-powered leaks. Submarines are mostly rated to about 300 metres, but you only need to water proof something 100 metres long. The deepest tube tunnel is the San Francisco tube tunnel 41 metres below. Maybe that's why the drop is done with a steep slope. It minimises the length of the high pressure section. But there could be a completely different reason for doing the drop at a steep angle?

bjw

QLD

3687 posts

13 Nov 2024 7:57pm

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Mr Milk said..
You talking about the Franklin dam in Tasmania?
The plan that Tassie hydro had was for a 180MW generator. That's less than a single unit in most coal plants, so it's a bit of a stretch to claim that the success of the Greens in blocking it was responsible for more coal power.

So how many Hydro projects were approved since 1978 when they cancelled the Franklin Hydro Electricity project?

Note the Snowy Hydro delivered about 15% of NSW energy in the 80s. Is that not a significant amount of coal?

GreenPat

QLD

4096 posts

13 Nov 2024 9:05pm

I believe that cavitation on the turbine blades is a significant issue with above ground pump stations, they need to be below the level of the lower reservoir. I could be wrong though.

bjw

QLD

3687 posts

17 Nov 2024 11:30am

Is the drill still stuck?

myusernam

QLD

6154 posts

18 Nov 2024 10:36am

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bjw said..
Is the drill still stuck?

Yep. And theyre still all upbeat and everything and without anymore unforseen snafus (its harldy started) will come in at 8 - 9B

Mr Milk

NSW

3120 posts

18 Nov 2024 4:34pm

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bjw said..
Is the drill still stuck?

Not for several months now. This item from July explains it
www.smh.com.au/politics/federal/how-florence-got-her-groove-back-at-snowy-2-0-20240718-p5jutc.html

Florence the giant tunnel boring machine has again started grinding away under the Snowy Mountains, after spending two months stuck in rock while a recovery team blasted her free with powerful water jets.

Two other tunnel boring machines are whirring away on Snowy 2.0 with relative success. Lady Eileen Hudson has completed the 2.8-kilometre main access tunnel to the power station. It has completed three kilometres of the six-kilometre tailrace tunnel, which will connect the underground power station to the lower Talbingo reservoir.

Kirsten completed a 2.9-kilometre emergency, cable and ventilation tunnel and is now excavating the 1.6-kilometre Inclined Pressure Shaft, which will connect the underground power station to the headrace tunnel where Florence is working.

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