Thermally stabilized heliostat
Abstract
An improvement in a heliostat having a main support structure and pivoting and tilting motors and gears and a mirror module for reflecting solar energy onto a collector, the improvement being characterized by an internal support structure within each mirror module and front and back sheets attached to the internal support structure, the front and back sheets having the same coefficient of thermal expansion such that no curvature is induced by temperature change, and a layer of adhesive adhering the mirror to the front sheet. The adhesive is water repellent and has adequate set strength to support the mirror but has sufficient shear tolerance to permit the differential expansion of the mirror and the front sheet without inducing stresses or currature effect. The adhesive also serves to dampen fluttering of the mirror and to protect the mirror backside against the adverse effects of weather. Also disclosed are specific details of the preferred embodiment.
- Inventors:
-
- Littleton, CO
- Issue Date:
- OSTI Identifier:
- 864493
- Patent Number(s):
- 4373783
- Assignee:
- Atlantic Richfield Company (Los Angeles, CA)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F24 - HEATING F24S - SOLAR HEAT COLLECTORS
F - MECHANICAL ENGINEERING F28 - HEAT EXCHANGE IN GENERAL F28F - DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- DOE Contract Number:
- MDH 83-2729E
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- thermally; stabilized; heliostat; improvement; main; support; structure; pivoting; tilting; motors; gears; mirror; module; reflecting; solar; energy; collector; characterized; internal; front; sheets; attached; coefficient; thermal; expansion; curvature; induced; temperature; change; layer; adhesive; adhering; sheet; water; repellent; adequate; set; strength; sufficient; shear; tolerance; permit; differential; inducing; stresses; currature; effect; serves; dampen; fluttering; protect; backside; adverse; effects; weather; disclosed; specific; details; preferred; embodiment; adverse effects; temperature change; thermal expansion; preferred embodiment; solar energy; support structure; main support; differential expansion; mirror module; internal support; reflecting solar; thermally stabilized; tilting motors; /359/126/
Citation Formats
Anderson, Alfred J. Thermally stabilized heliostat. United States: N. p., 1983.
Web.
Anderson, Alfred J. Thermally stabilized heliostat. United States.
Anderson, Alfred J. Sat .
"Thermally stabilized heliostat". United States. https://www.osti.gov/servlets/purl/864493.
@article{osti_864493,
title = {Thermally stabilized heliostat},
author = {Anderson, Alfred J},
abstractNote = {An improvement in a heliostat having a main support structure and pivoting and tilting motors and gears and a mirror module for reflecting solar energy onto a collector, the improvement being characterized by an internal support structure within each mirror module and front and back sheets attached to the internal support structure, the front and back sheets having the same coefficient of thermal expansion such that no curvature is induced by temperature change, and a layer of adhesive adhering the mirror to the front sheet. The adhesive is water repellent and has adequate set strength to support the mirror but has sufficient shear tolerance to permit the differential expansion of the mirror and the front sheet without inducing stresses or currature effect. The adhesive also serves to dampen fluttering of the mirror and to protect the mirror backside against the adverse effects of weather. Also disclosed are specific details of the preferred embodiment.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1983},
month = {Sat Jan 01 00:00:00 EST 1983}
}