There would be a ball valve to stop water going back, if it starts boiling in that area. So there would be already some real steam power for the flash chamber.
Then there would be the real flash chamber, heated with a point focusing parabolic mirror. The water would come in trough a small hole, with a needle valve.
The focusing mirror can be going around with the same clockwork and axle as the trough mirror.
------- To Troy:
If a point focusing parabolic mirror is moving the same way as a trough mirror we have no need to track it with altitude and azimuth?
------- How to make parabolic mirrors cheaply even in rural areas, there are many drawings, if you look at my pages with my 'user info'.
More drawings are available for example here: http://www.solarcooking.org/
------ How to pump water high up?
Maybe the best way is to use solar. I've given some ideas how to build simple solar pumps earlier. Please look at my earlier comments.
- Hannu
The parabolic trough only needs vertical tracking, as the focal "point" is a long tube, so it doesn't matter where on the receiver tube the sun hits, so that lets you out of dual axis tracking.
Best regards,
troy[ Parent ]
Please see:
http://www.geocities.com/davidmdelaney/scheffler-precis/scheffler-precis.html
An extract from that text:
---------------------------------------- The optical system of Scheffler's community solar cooker forms a heliostat. An article on heliostats in the eleventh edition (1910) of the Encyclopaedia Brittanica defines a heliostat as "an instrument which will reflect the rays of the sun in a fixed direction notwithstanding the motion of the sun. The optical apparatus generally consists of a mirror mounted on an axis parallel to the axis of the earth, and rotated with the same angular velocity as the sun."
The heliostat of Scheffler's cooker comprises a primary reflector, a secondary reflector, and a clockwork powered by gravity or photovoltaic panels. The primary reflector produces a converging beam of sunlight aligned with an axis of rotation which is parallel to the axis of the earth, and which passes through the centers of both reflectors. The clockwork rotates the primary reflector around its axis of rotation at a rate of one revolution per day, keeping the reflected beam aligned with the axis of rotation as the sun moves. The fixed secondary reflector reflects the beam from the primary reflector onto a cooking pot or frying surface. --------------------------------
This kind of movement needs seasonal adjustments, however. The movement around the axis must be precise of course.
Scheffler reflectors are are providing an example, which kind of simple powerful solar devices can be constructed. Even a 'normal' small steam engine boiler can be powered with these reflectors, of course.
- Hannu[ Parent ]
