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Now That's a Tunnel; 57 km Long, 2,300 m Deep!

06/03/2016 2:41 PM

...and it requires 15.6 MW for the ventilation system.

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#1

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/03/2016 3:11 PM

Was hearing some about this yesterday or day before on NPR (I listen to, but do not agree with everything I hear). Seems this is to get rid of too many semi-trucks hauling freight over hill and dale in Switzerland, that is leading to excessive pollution, traffic snarls, etc.

Not only that, it moves the freight more efficiently, and the ventilation is but a fraction of the power being spent by idling diesels when the traffic piles up, I bet.

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#2

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/03/2016 3:25 PM
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#3
In reply to #2

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/03/2016 4:02 PM

Looks all shiny and new now, hope that is an electric train, not diesel...just sayin'.

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#5
In reply to #3

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/03/2016 7:29 PM
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#4

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/03/2016 5:41 PM

That's three full size wind turbines . . . . . or $2,340 per hour at $0.15 per kWhr. Maybe they'll get volume pricing.

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#6
In reply to #4

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/03/2016 9:56 PM

Elon Musk's Hyperloop does make sense in comparison to this, after all. Cut all this ventilation energy cost in tunnels.

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#15
In reply to #6

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/06/2016 1:57 PM

Especially good, since no one can hear you (or me) scream in a vacuum.

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#14
In reply to #4

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/06/2016 1:56 PM

They make 5-6 MWe wind turbines now? I thought the big boys were only 3 MWe.

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#16
In reply to #14

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/07/2016 1:01 AM

Some of the big off-shore turbines are in that range.

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#17
In reply to #16

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/07/2016 8:36 AM

Those make the ones around here look like toys. How do they keep the tips under sonic? Slow rotation rate, I expect.

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#18
In reply to #17

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/08/2016 12:53 AM

The large ones I've seen probably rotate 60 RPM or less.

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#19
In reply to #16

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/24/2016 12:57 AM

I thought that Switzerland was land-locked.

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#7

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/04/2016 6:13 AM

Wow! That must be for the NYC's 2nd Ave. Line Subway Tunnel that they've been trying to complete for ages now!

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#8

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/04/2016 6:50 AM

I would have thought that a tunnel with a train running at 200kmph would ventilate itself. Or good old fashioned vertical chimneys at regular intervals like in steam train days.

And 2.3km deep sounds like artistic license. 2.3km below the hist peak maybe, but otherwise almost ground level.

I am not decrying the engineering skill; a 57km tunnel through a mountain is an amazing achievement.

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#10
In reply to #8

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/06/2016 11:29 AM

High speed trains build up a pressure wave in front of them.

To relieve the pressure you either provide ventilation or build large tunnels as on the UK's HS1 under Bluebell Hill.

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#12
In reply to #10

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/06/2016 12:40 PM

I assumed ventilation was for air pollution control.

I have trouble with seeing how the pressure wave from a 200kmph train is relieved by ventilation.

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#13
In reply to #12

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/06/2016 1:47 PM

https://www.youtube.com/watch?v=YzEX5NHeR04

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#9

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/04/2016 7:21 AM

What really impressed me what that there's /three stations/ in it.

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#11
In reply to #9

Re: Now that's a tunnel; 57km long, 2,300m deep!

06/06/2016 11:36 AM

https://www.youtube.com/watch?v=U6OHD2uCpfU

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