Solar central receiver heliostat reflector assembly
A heliostat reflector assembly for a solar central receiver system comprises a light-weight, readily assemblable frame which supports a sheet of stretchable reflective material and includes mechanism for selectively applying tension to and positioning the sheet to stretch it to optical flatness. The frame is mounted on and supported by a pipe pedestal assembly that, in turn, is installed in the ground. The frame is controllably driven in a predetermined way by a light-weight drive system so as to be angularly adjustable in both elevation and azimuth to track the sun and efficiently continuously reflect the sun's rays to a focal zone, i.e., central receiver, which forms part of a solar energy utilization system, such as a solar energy fueled electrical power generation system. The frame may include a built-in system for testing for optical flatness of the reflector. The preferable geometric configuration of the reflector is octagonal; however, it may be other shapes, such as hexagonal, pentagonal or square. Several different embodiments of means for tensioning and positioning the reflector to achieve optical flatness are disclosed. The reflector assembly is based on the stretch frame concept which provides an extremely light-weight, simple, low-cost reflector assembly that may be driven for positioning and tracking by a light-weight, inexpensive drive system. 14 claims.
- Assignee:
- Dept. of Energy
- Patent Number(s):
- US 4209236
- OSTI ID:
- 5139876
- Resource Relation:
- Patent File Date: Filed date 21 Oct 1977; Other Information: PAT-APPL-844,400
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HELIOSTATS
DESIGN
TOWER FOCUS COLLECTORS
CENTRAL RECEIVERS
POSITIONING
SOLAR REFLECTORS
SOLAR TRACKING
TOWER FOCUS POWER PLANTS
CONCENTRATING COLLECTORS
EQUIPMENT
POWER PLANTS
SOLAR COLLECTORS
SOLAR CONCENTRATORS
SOLAR EQUIPMENT
SOLAR POWER PLANTS
SOLAR RECEIVERS
SOLAR THERMAL POWER PLANTS
141000* - Solar Collectors & Concentrators