heliostat


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heliostat

(hee -lee-ŏ-stat) A coelostat mirror mounted on a synchronously controlled drive mechanism so that it may reflect sunlight in a fixed direction as the Sun moves across the sky. Together with additional optical elements it is a basic component of most solar telescopes.

heliostat

[′hē·lē·ə‚stat]
(engineering)
A clock-driven instrument mounting which automatically and continuously points in the direction of the sun; it is used with a pyrheliometer when continuous direct solar radiation measurements are required.
References in periodicals archive ?
The latter require appropriate control of the two decoupled movements which are used in concentrating thermal power plants for the orientation of heliostats [3], to increase their efficiency which can reach values of 30 % compared to fixed systems [4], again, a computation method of the six angular parameter with a combination of the tracking angle bias strategy and the error-correction model in the of maximizing heliostat tracking accuracy [5].
Each heliostat consists of four flat, low-iron glass mirrors that provide maximum reflectivity for the life of the project.
Once online, this facility, constructed by BrightSource Energy, Inc, will feature 50,000 heliostats, which are individually controlled mirrors using wireless communication being to actuate motors that rotate and tilt each mirror precisely to concentrate huge amounts of energy towards a boiler that sits atop a tower.
For commercial solar tower installations, however, the proper control of the heliostat field will be more economical.
Just look at the 170,000 shining heliostat mirrors and the three towers that would dwarf the Statue of Liberty.
A two-axis heliostat has been designed, manufactured and tested.
With the use of heliostat mirrors, the sun's rays are absorbed and used as a source of energy to heat the boilers located on centralized solar towers.
The Khi Solar One project consists of a 200-metre high tower and more than 4,500 heliostat moving mirrors to reflect light onto the tower.
4 billion were solar cells and batteries, heliostats, and heliostat receivers that were shipped mostly to China, according to the Ministry of Economic Affairs (MOEA).
Smart grids and plug-in cars are also on its list of green projects, as are a number of riskier ventures, including work on a heliostat - a mirrored device that directs the sun's rays to create thermal energy - and high-altitude flying wind turbines.
The Sky gallery is a rooftop terrace featuring a heliostat and information about the sun, climate and astrology.
The heliostat can also be set to capture moonlight.