also, at the top of … also, at the top of the tower, if there was a right-angle swiveling elbow for the exhaust to be released in the direction of the wind, the wind will create a vacuum that will pull the air from tube as well
i think
if they … i think
if they put the canopy over a black-top asphalt parking lot,
the air would be heated much more quickly - also it would
work longer at night with all of the heat absorption during
the day, anything that is the color black will always absorb
more heat from the sun- better yet would be a large black metal egg-carton underneath the canopy which would yield more heated sq footage for the same canopy size
I heard these solar … I heard these solar updraft towers are less than 1% efficient! Compare that to the SunCatcherTM unit from StirlingEnergySystems which is a CSP dish collector that can get 25 KW with an area of about 80m2. The energy conversion principles at work here are the greenhouse effect and the chimney effect…. which require huge areas. I’d stick with the Stirling Cycle and concentrated solar. Where else can you get 31.25% solar to electrical efficiencies? Good Idea…. if you are a hippy.
a peak perfomance … a peak perfomance of 60kW and a sustained one of 30kw? this is the power output of a small car at an investment of 1.000.000 US$. This is a losing proposition then and it will be. You cannot trick physics. The numbers dont bear that out. A thinly spread source of energy will always require huge collective mechanisms.
With peak oil having arrived and peak carbon in general looming around the corner I just don’t see any serious alternative to nuclear if we dont want to freeze in the dark.
It’s about … It’s about capturing convection currents. The air keeps moving. The only time it would stop is if the air cools before it reaches the top in which case the convection cycles within the tube.
THIS!!!!! in 1964 … THIS!!!!! in 1964 13 year old Elisa Johnson was raped and murdered in North Carolina, her body was found with multiple stab wounds, and now that you’ve read this, every night she will come to your house and hang from your closet with glowing red eyes, the only way to stop this is to post this to 10 other videos. SORRY I DIDNT WANT HER IN MY ROOM
Is there any reason … Is there any reason why heat from the sun’s light would not also get, to some extent, trapped inside the tower, further raising the temperature of the air there and contributing the the vacuum effect drawing in the air under the canopy?
The air under the … The air under the canopy is heated. Some of it enters the tower. When in the tower, it will lift and suck in more hot air into the tower. When starting, some hot air will escape att the outer edge, but as opposed to the air in the tower, it won’t keep sucking out more hot air. When the process is up and running, most of the hot air will get sucked into the tower.
But in order for … But in order for that to do any good, the canopy would still have to be higher around the base of the tower than around its outer edge or the rising air would simply escape over the edge of the canopy, unless the air inside the tower is also being heated, and therefore is rising, causing a vacuum which draws in the air from under the canopy, which, being heated, contributes to the lift effect.
… maybe they just … … maybe they just keep canopy closed for some time untill its warm enough and then open the tower and open some ways to canopy itself so that heat air can escape….
As far as I can … As far as I can tell, though, the canopy is completely level. If this is the case, then there is no reason why heated air would escape up the tower more than it would simply escape over the edge of the canopy. If the canopy is sealed to the ground, then how does air get in in the first place?
Of course not.
The … Of course not.
The air is being heated in canopy (greenhouse). And as we all know heated air is lighter then cool air so that it will tend to go up. And the only way to escape is tower, and in tower are generators.
truthiness79: … truthiness79: that’s not the idea with this particular tower. This is to drive heat up the chimney. I’m sure you’ve seen the other excellent projects from Spain regarding using parabolic mirrors to drive a turbine at the top of a tower. This example is first project they worked on.
With a build cost of US$1 million, this is a great solution.
So then the air is … So then the air is drawn under the canopy by the force of air being drawn up the tower, and that force is being generated by the heat from the sun being trapped inside the tower?
Brett Rodli, Website Developer, SolarMission Technologies, Inc.
August 24th, 2009 at 12:15 am
wow must cost you …
wow must cost you $50 just to turn the TV on where you live.
August 24th, 2009 at 12:15 am
According to my …
According to my calculation home pv cost $1500 /kwh. This machine cost 33000/kwh. Is this correct?
August 24th, 2009 at 12:15 am
also, at the top of …
also, at the top of the tower, if there was a right-angle swiveling elbow for the exhaust to be released in the direction of the wind, the wind will create a vacuum that will pull the air from tube as well
August 24th, 2009 at 12:15 am
i think
if they …
i think
if they put the canopy over a black-top asphalt parking lot,
the air would be heated much more quickly - also it would
work longer at night with all of the heat absorption during
the day, anything that is the color black will always absorb
more heat from the sun- better yet would be a large black metal egg-carton underneath the canopy which would yield more heated sq footage for the same canopy size
August 24th, 2009 at 12:15 am
We need to get …
We need to get smart about energy.
August 24th, 2009 at 12:15 am
I heard these solar …
I heard these solar updraft towers are less than 1% efficient! Compare that to the SunCatcherTM unit from StirlingEnergySystems which is a CSP dish collector that can get 25 KW with an area of about 80m2. The energy conversion principles at work here are the greenhouse effect and the chimney effect…. which require huge areas. I’d stick with the Stirling Cycle and concentrated solar. Where else can you get 31.25% solar to electrical efficiencies? Good Idea…. if you are a hippy.
August 24th, 2009 at 12:15 am
a peak perfomance …
a peak perfomance of 60kW and a sustained one of 30kw? this is the power output of a small car at an investment of 1.000.000 US$. This is a losing proposition then and it will be. You cannot trick physics. The numbers dont bear that out. A thinly spread source of energy will always require huge collective mechanisms.
With peak oil having arrived and peak carbon in general looming around the corner I just don’t see any serious alternative to nuclear if we dont want to freeze in the dark.
August 24th, 2009 at 12:15 am
The turbines create …
The turbines create drag on the system. Just like any motor the more current you draw the more fuel you need.
August 24th, 2009 at 12:15 am
It’s about …
It’s about capturing convection currents. The air keeps moving. The only time it would stop is if the air cools before it reaches the top in which case the convection cycles within the tube.
August 24th, 2009 at 12:15 am
nice pink sweater.
nice pink sweater.
August 24th, 2009 at 12:15 am
maybe its just …
maybe its just enough for the hot air in the middle of the canopy to go up the tower and the rest from the outer edge
August 24th, 2009 at 12:15 am
THIS!!!!! in 1964 …
THIS!!!!! in 1964 13 year old Elisa Johnson was raped and murdered in North Carolina, her body was found with multiple stab wounds, and now that you’ve read this, every night she will come to your house and hang from your closet with glowing red eyes, the only way to stop this is to post this to 10 other videos. SORRY I DIDNT WANT HER IN MY ROOM
August 24th, 2009 at 12:15 am
Is there any reason …
Is there any reason why heat from the sun’s light would not also get, to some extent, trapped inside the tower, further raising the temperature of the air there and contributing the the vacuum effect drawing in the air under the canopy?
August 24th, 2009 at 12:15 am
The air under the …
The air under the canopy is heated. Some of it enters the tower. When in the tower, it will lift and suck in more hot air into the tower. When starting, some hot air will escape att the outer edge, but as opposed to the air in the tower, it won’t keep sucking out more hot air. When the process is up and running, most of the hot air will get sucked into the tower.
August 24th, 2009 at 12:15 am
But in order for …
But in order for that to do any good, the canopy would still have to be higher around the base of the tower than around its outer edge or the rising air would simply escape over the edge of the canopy, unless the air inside the tower is also being heated, and therefore is rising, causing a vacuum which draws in the air from under the canopy, which, being heated, contributes to the lift effect.
August 24th, 2009 at 12:15 am
… maybe they just …
… maybe they just keep canopy closed for some time untill its warm enough and then open the tower and open some ways to canopy itself so that heat air can escape….
August 24th, 2009 at 12:15 am
As far as I can …
As far as I can tell, though, the canopy is completely level. If this is the case, then there is no reason why heated air would escape up the tower more than it would simply escape over the edge of the canopy. If the canopy is sealed to the ground, then how does air get in in the first place?
August 24th, 2009 at 12:15 am
Well they’re also …
Well they’re also working on such a project in the Australian outback.
August 24th, 2009 at 12:15 am
Of course not.
The …
Of course not.
The air is being heated in canopy (greenhouse). And as we all know heated air is lighter then cool air so that it will tend to go up. And the only way to escape is tower, and in tower are generators.
August 24th, 2009 at 12:15 am
truthiness79: …
truthiness79: that’s not the idea with this particular tower. This is to drive heat up the chimney. I’m sure you’ve seen the other excellent projects from Spain regarding using parabolic mirrors to drive a turbine at the top of a tower. This example is first project they worked on.
With a build cost of US$1 million, this is a great solution.
August 24th, 2009 at 12:15 am
Lol, you idiot!
Lol, you idiot!
August 24th, 2009 at 12:15 am
no no no, they have …
no no no, they have to much Coal Power, SWEDEN NR 1!!
August 24th, 2009 at 12:15 am
So then the air is …
So then the air is drawn under the canopy by the force of air being drawn up the tower, and that force is being generated by the heat from the sun being trapped inside the tower?
August 24th, 2009 at 12:15 am
Why not put several …
Why not put several turbines up the tube?
August 24th, 2009 at 12:15 am
Germany is the …
Germany is the leading country for renewable energy sources!