heliostat


Also found in: Dictionary, Wikipedia.

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.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
1) a rim drive mechanism for the heliostat that reduces weight and improves performance, 2) a decentralized heliostat control scheme that draws its power from a local photovoltaic supply (with battery storage), and 3) a wireless heliostat control that reduces cabling costs, simplifies deployment, and enables better scalability.
Further, he also studied the theoretical derivation of heliostat tracking error distribution using methods of integral geometry and geometrical probabilities [16].
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].
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.
The heliostat array can account for up to 60 percent of the capital costs of a solar thermal facility; so if possible, facilities should be designed to make full use of the light falling on the mirrors.
The shading saves cooling energy, while the heliostat directs sunlight for heating and lighting into or away from the building and the adjoining park when it is most needed.
These systems are usually formed by an external collecting tool like a heliostat and a duct.
Just look at the 170,000 shining heliostat mirrors and the three towers that would dwarf the Statue of Liberty.
For a solar cavity receiver, there is an aperture on the front face of the cavity, through which sunlight concentrated by a heliostat field projects onto the surfaces inside the receiver.
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.