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The Stretched Lens Array (SLA) : An Ultra-Light Photovoltaic Concentrator

Author
ONeill, Mark J.
Published
October 2002.
Physical Description
1 electronic document
Additional Creators
George, Patrick J., Botke, Matthew M., Pisczor, Michael F., Eskenazi, Michael I., Jaster, Paul A., Brandhorst, Henry W., Edwards, David L., and McDanal, A. J.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
A high-performance, ultralight, photovoltaic concentrator array is being developed for space power. The stretched lens array (SLA) uses stretched-membrane, silicone Fresnel lenses to concentrate sunlight onto triple-junction photovoltaic cells. The cells are mounted to a composite radiator structure. The entire solar array wing, including lenses, photovoltaic cell flex circuits, composite panels, hinges, yoke, wiring harness, and deployment mechanisms, has a mass density of 1.6 kg/sq.m. NASA Glenn has measured 27.4% net SLA panel efficiency, or 375 W/sq.m. power density, at room temperature. At GEO operating cell temperature (80 C), this power density will be 300 W/sq.m., resulting in more than 180 W/kg specific power at the full wing level. SLA is a direct ultralight descendent of the successful SCARLET array on NASA's Deep Space 1 spacecraft. This paper describes the evolution from SCARLET to SLA, summarizes the SLA's key features, and provides performance and mass data for this new concentrator array.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20030000587.
17th Space Photovoltaic Research and Technology Conference; 14-23; NASA/CP-2002-211831.
Terms of Use and Reproduction
No Copyright.
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