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Old September 2nd, 2008, 01:12 PM   #381
luci203
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This Tower is all about economics... so I belive it will never built.

5x200m towers are cheaper than 1x1000m and produce the same amount of power, plus the mentenance of a 1000m tower would be hell...
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Old September 2nd, 2008, 11:47 PM   #382
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Quote:
Originally Posted by Victhor View Post
Spain already had the first one! but only 200 metres tall or so and it fell down. And we have the heliostate towers in Sevilla (3 towers x 160 metres), anyone has seen this kind of tower outside Spain?
I seem there is in France a similar heliostate tower in the French Pyrenées but the design is diferent. About Spain I was refering about the 750 m project in Ciudad Real, I wrote yesterday to Campo 3 to have more information about the state of the project.
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Old September 3rd, 2008, 12:41 PM   #383
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we have this one planned *in* london



large amounts of public support for it. if it goes ahead, and i think it should, itll be revolutionary. in this case the turbine is in the centre of the tower, the dome around it houses offices under it and they will be topped by tropical gardens. lopping around the outside of the solar chimney as you can see will be apartments!
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Old September 3rd, 2008, 04:33 PM   #384
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wth? you should make new thread on that, but looks like those towers from Chicago.
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Old September 3rd, 2008, 04:35 PM   #385
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There was a thread on it a while ago.
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Old September 3rd, 2008, 07:34 PM   #386
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it's visionary, so no thread
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Old September 3rd, 2008, 07:49 PM   #387
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Is there a plan to built those huge structures, especially more 1.0 km high ?
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Old September 3rd, 2008, 10:00 PM   #388
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http://www.skyscrapernews.com/news.php?ref=1729




World's Tallest Structure Planned In Namibia

Published on 03-09-2008 by Skyscrapernews.com

What could be one of the defining landmarks in the evolution of solar technology that will see the world's tallest structure built looks like happening in the south African state of Namibia.

German firm Hanh & Hahn are planning to construct a 1,500 metre tall solar tower in the depths of the Namibian desert for the cost of $150 million dollars that can potentially generate 400 megawatts of power - equivalent to 308 average wind turbines.

The structure will be called Greentower and feature a massive greenhouse 200 metres in diameter with a central concrete chimney to channel the updrafts caused by the air currents created within by the natural heating of the structure from the sun that will run almost twice the height of the Burj Dubai.

The solar chimney will contain wind turbines that will be powered by the moving air currents and generate most of the schemes power.

As an additional source of income for the developer, the greenhouse will be used to grow crops too turning an otherwise arid desert into a resource that can be harnessed and used to feed Africa with, a concept so simple some might wonder why it has taken so long to even be proposed.

Solar power of this nature is gradually becoming more popular. Even London has seen a similar proposal in recent months by Rafael Vinoly to stand next to Battersea Power Station. Despite being 300 metres tall that proposal has secured over 70% public support from Londoners indicating there's a huge amount of enthusiasm for this technology.

If built Hanh & Hahn's scheme will take it to new heights but the Namibian government is claiming they have yet to receive a serious proposal making some fear this could all be a lot of hot air.
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Old September 3rd, 2008, 10:14 PM   #389
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haha would be quite hard for dubai if this gets built :-D
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This has made a lot of people very angry and been widely regarded as a bad move.
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Old September 3rd, 2008, 10:27 PM   #390
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I really, really hope it gets built, and hopefully many others like it. As the 21st century progresses we are going to need as many of these solar towers as possible, to reverse the effects of global warming. I love the inclusion of the greenhouse too, which could provide food to starving Africans. In fact these mega-projects could actually go a long way towards reducing poverty in the developing world... just imagine if we built hundreds of them.
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Old September 3rd, 2008, 10:55 PM   #391
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How much energy is generated from one of those?
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Old September 3rd, 2008, 10:55 PM   #392
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Read the article.

"... can potentially generate 400 megawatts of power - equivalent to 308 average wind turbines."
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Old September 3rd, 2008, 11:30 PM   #393
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Quote:
Originally Posted by The other Dude View Post
haha would be quite hard for dubai if this gets built :-D
Let's wait and see how fast "Dubai" will come with it's own solar tower. It's not like they got the climate against them and they do use more and more electricity every day.
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Old September 4th, 2008, 12:39 AM   #394
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Quote:
Originally Posted by wjfox View Post
http://www.skyscrapernews.com/news.php?ref=1729




World's Tallest Structure Planned In Namibia

Published on 03-09-2008 by Skyscrapernews.com

What could be one of the defining landmarks in the evolution of solar technology that will see the world's tallest structure built looks like happening in the south African state of Namibia.

German firm Hanh & Hahn are planning to construct a 1,500 metre tall solar tower in the depths of the Namibian desert for the cost of $150 million dollars that can potentially generate 400 megawatts of power - equivalent to 308 average wind turbines.

The structure will be called Greentower and feature a massive greenhouse 200 metres in diameter with a central concrete chimney to channel the updrafts caused by the air currents created within by the natural heating of the structure from the sun that will run almost twice the height of the Burj Dubai.

The solar chimney will contain wind turbines that will be powered by the moving air currents and generate most of the schemes power.

As an additional source of income for the developer, the greenhouse will be used to grow crops too turning an otherwise arid desert into a resource that can be harnessed and used to feed Africa with, a concept so simple some might wonder why it has taken so long to even be proposed.

Solar power of this nature is gradually becoming more popular. Even London has seen a similar proposal in recent months by Rafael Vinoly to stand next to Battersea Power Station. Despite being 300 metres tall that proposal has secured over 70% public support from Londoners indicating there's a huge amount of enthusiasm for this technology.

If built Hanh & Hahn's scheme will take it to new heights but the Namibian government is claiming they have yet to receive a serious proposal making some fear this could all be a lot of hot air.
see my post 354.
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Old September 4th, 2008, 01:14 AM   #395
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Quote:
Originally Posted by wjfox View Post
Read the article.

"... can potentially generate 400 megawatts of power - equivalent to 308 average wind turbines."
They never say how much is consumed in building one, my guess from earlier estimations is that this will take over 200 years to pay back the energy used in construction. I know you like to think this is a great solution, but to me it seems far more of a problem!

Look to the oceans for real options!

EDIT: here goes:

4.8 * 10^9 Joules to produce 1 tonne of concrete, thats 4800 mega joules (from here http://www.edcmag.com/CDA/Articles/C...00000000166118 - 1 BTU = 1 055.05585 joules )
weight of CN tower is 118,000 tonnes so let's use a conservative estimate for this 1.5km tower as 300,000 tonnes.
time to pay off 1 tonne of concrete at 400MW = 12 seconds (watt is a joule per second)
Time to pay off entire tower = 41 days

Clearly i made a mistake last time, apologies... carry on
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Last edited by nezzybaby; September 4th, 2008 at 01:26 AM.
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Old September 4th, 2008, 01:33 AM   #396
malec
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Huh?

If it takes 4800MJ to produce a tonne of concrete then running at 400MW it'll take 12 seconds to pay off one tonne not 12 hours
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Old September 4th, 2008, 01:36 AM   #397
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^That's strange was sure i'd edited it before anyone had a chance to read that...


My last edit:
Last edited by nezzybaby; Today at 11:26 PM.

Malecs post:
Today, 11:33 PM

hmmmmmm
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Old September 4th, 2008, 01:42 AM   #398
malec
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I think I kept the page open for a while while I was editing it.
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Old September 4th, 2008, 03:09 AM   #399
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$150 million compared to 308 'average' wind turbines? How much does an 'average' wind turbine cost?

It would be great to have a cost/output comparison of this with other green systems. I like tall towers, but I also like projects that make sense.
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Old September 4th, 2008, 12:45 PM   #400
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^Average cost of a 1MW wind turbine is $1.5million, but that price can vary considerably with location.... as can i'm sure a solar tower.

However you're missing the real advantages, a solar tower will generate constantly, and will take up less ground space than 300 turbines. So this makes more sense not less
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