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Flash steam | 39 comments (38 topical, 1 editorial)

Re: Flash steam (4.00 / 1) (#15)
by JW on Fri Jun 27th, 2003 at 10:18:07 AM MST
(User Info)

I like this idea because it incorporates the tall water towers. These water towers will receive sunlight from all angles of the sun's travel. Hence the only need for tracking is for the flash tube. And I believe these towers can accumulate allot of energy. Its definitely something to work with. If these towers are of significant height the solar reception qualities will improve. Also the pressure on the water should be significant. However at the top of the column you will most likely have some issues. Due to convection circulation. but it would be interesting to learn from such a device if it worked or not. I'm not quite sure how to deal with the exhaust from the turbine. Or how to get the water back in the towers. often solutions present themselves with diligence and discovered options. JW-

[ Parent ]

Re: Flash steam (4.00 / 1) (#16)
by JW on Fri Jun 27th, 2003 at 10:54:05 AM MST
(User Info)

I've been throwing stuff across my office since I realized I spelled Hannu's name wrong, Please forgive me it was unintentional.

[ Parent ]

Re: Flash steam (4.00 / 1) (#18)
by hvirtane (hannu_markus_virtanen(at)yahoo(dot)com) on Sat Jun 28th, 2003 at 02:38:21 AM MST
(User Info) http://web.archive.org/web/20050404022706/www.cc.jyu.fi/~hvirtane/cooker/

Hello,

don't worry.

It happens to many people.

My late aunt's name was 'Hanna'.

By the way 'Virtanen' is the most common surname
in Finland.
Hannu is a quite common first name as well.

So there are hundreds of 'Hannu Virtanen'
is this country.

If you want to correct it on the board,
you can do it easily I think.
You make the correction on
the original, which you've got
upload it with the same name as the original
replacing the original.
Then it is there?

- Hannu

[ Parent ]

Re: Flash steam (4.00 / 1) (#17)
by Andrew (andrew@lookingglass.com) on Fri Jun 27th, 2003 at 08:28:20 PM MST
(User Info)

Looks promising.
I like the idea of using the water towers as solar collectors to build up some small pressure before the flash tube. The valve is a great idea, as it simply lets some low pressure water squirt in, and when the water flashes, it seals shut. Its a great idea. Looks promising. Might try and build a small solar flash boiler for fun.
Although I would reccomend some heat sinks installed before the valve to simply draw a slight vacuum at the valve. (as pointed out in my idea above.)
Also, I have seen solar boilers before that incorporate a darkend tube running through a focal point of an elongated parabla. (I think the Mojave desert solar thermal power plants runs this way)
-Andrew

[ Parent ]

Re: Flash steam (4.00 / 1) (#19)
by troy on Sat Jun 28th, 2003 at 08:50:07 AM MST
(User Info)

The big advantage of parabolic trough collectors is that they only have to be tracked in one axis, in comparison to a parabolic dish collector which must be tracked in both altitude and azimuth. Plus the boiler/heater tube in a trough collector sees less photons and heat per square centimeter, reducing the need for exotic high temp materials that still have good heat transfer qualities. Furthermore, a very good approximation of a parabolic trough can be made using plywood ribs and aluminum foil or mylar, so the cost becomes very inexpensive. For something more durable, the trough may be made of many 1.5" wide strips of glass mirror mounted on parabolic ribs.

Best Regards,

troy

[ Parent ]

Re: Flash steam (3.00 / 1) (#20)
by Anonymous Hero on Sat Jun 28th, 2003 at 10:58:46 AM MST

I think if you can keep that parabloic mirror on the focus point (ball flash chamber) at 1000 degrees or close, you might not need a valve at all. The flash explosion would both spin the turbine AND back the water up for a brief moment. Who knows? anyone?

[ Parent ]

Flash steam | 39 comments (38 topical, 1 editorial)

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