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Title: Heliostat Cost Reduction.


Abstract not provided.

; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the Energy Sustainability 2007 held June 27-30, 2007 in Long Beach, CA.
Country of Publication:
United States

Citation Formats

Kolb, Gregory J., Donnelly, Mathew W., David Gorman, Robert Thomas, Ron Lumia, and Roger Davenport. Heliostat Cost Reduction.. United States: N. p., 2007. Web.
Kolb, Gregory J., Donnelly, Mathew W., David Gorman, Robert Thomas, Ron Lumia, & Roger Davenport. Heliostat Cost Reduction.. United States.
Kolb, Gregory J., Donnelly, Mathew W., David Gorman, Robert Thomas, Ron Lumia, and Roger Davenport. Tue . "Heliostat Cost Reduction.". United States. doi:.
title = {Heliostat Cost Reduction.},
author = {Kolb, Gregory J. and Donnelly, Mathew W. and David Gorman and Robert Thomas and Ron Lumia and Roger Davenport},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}

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  • This paper presents the background and rationale and describes the development effort of a potentially low-cost, concentrating reflector design. The proposed reflector design is called the stretched-membrane concept. In this concept a reflector film - which can be metal, polymeric, or of a composite construction - is stretched on a hollow torroidal frame that offers a structurally efficient and optically accurate surface. Although the intent is to improve heliostat concentrator cost and performance for solar thermal applications, the collector design approach proposed here may well offer effective cost and performance opportunities for improving photovoltaic and solar daylighting applications as well.more » Some of the major advantages include a reflector, a support frame, and support structures that can be made extremely lightweight and low in cost because of the effective use of material with high average stress levels in the reflector and support frame; a 75% reduction in the weight of the reflector and support structure (down to the drive attachment) over the second-generation glass-and-metal heliostat concept; a better than 50% cost reduction for the reflector assembly and support structure compared to corresponding elements of the second-generation concept; and, finally, optical accuracies and an annual energy delivery potential close to those attainable with current glass-and-metal heliostats. In this paper results of initial design studies, performance predictions, and analysis are presented, as well as results corresponding to subscale testing. Also included are recommendations for further development and for resolving remaining issues.« less