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Cost analysis of flat-plate concentrators employing microscale photovoltaic cells for high energy per unit area applications

2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014

Paap, Scott; Gupta, Vipin P.; Tauke-Pedretti, Anna; Resnick, Paul; Sanchez, Carlos A.; Nielson, Gregory N.; Cruz-Campa, Jose L.; Jared, Bradley H.; Nelson, Jeffrey; Okandan, Murat; Sweatt, W.C.

Microsystems Enabled Photovoltaics (MEPV) is a relatively new field that uses microsystems tools and manufacturing techniques familiar to the semiconductor industry to produce microscale photovoltaic cells. The miniaturization of these PV cells creates new possibilities in system designs that can be used to reduce costs, enhance functionality, improve reliability, or some combination of all three. In this article, we introduce analytical tools and techniques to estimate the costs associated with a hybrid concentrating photovoltaic system that uses multi-junction microscale photovoltaic cells and miniaturized concentrating optics for harnessing direct sunlight, and an active c-Si substrate for collecting diffuse sunlight. The overall model comprises components representing costs and profit margin associated with the PV cells, concentrating optics, balance of systems, installation, and operation. This article concludes with an analysis of the component costs with particular emphasis on the microscale PV cell costs and the associated tradeoffs between cost and performance for the hybrid CPV design.

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TYPE Conference YEAR 2014
ScopusOSTIDOI

Design of wearable binoculars with on-demand zoom

Proceedings of SPIE - The International Society for Optical Engineering

Boye, Robert; Wolfley, Steven; Yelton, W.G.; Goeke, Ronald S.; Hunt, Jeffery P.; Ison, Aaron; Jared, Bradley H.; Pillars, Jamin R.; Saavedra, Michael P.; Sweatt, W.C.; Winrow, Edward G.

Sandia has developed an optical design for wearable binoculars utilizing freeform surfaces and switchable mirrors. The goals of the effort included a design lightweight enough to be worn by the user while providing a useful field of view and magnification as well as non-mechanical switching between normal and zoomed vision. Sandia's approach is a four mirror, off-axis system taking advantage of the weight savings and chromatic performance of a reflective system. The system incorporates an electrochromic mirror on the final surface before the eye allowing the user to switch between viewing modes. Results from a prototype of a monocular version with 6.6x magnification will be presented. The individual mirrors, including three off-axis aspheres and one true freeform, were fabricated using a diamond-turning based process. A slow-slide servo process was used for the freeform element. Surface roughness and form measurement of the freeform mirror will be presented as well as the expected impact on performance. The alignment and assembly procedure will be reviewed as well as the measured optical performance of the prototype. In parallel to the optical design work, development of an electrochromic mirror has provided a working device with faster switching than current state of the art. Switchable absorbers have been demonstrated with switching times less than 0.5 seconds. The deposition process and characterization of these devices will be presented. Finally, details of an updated optical design with additional freeform surfaces will be presented as well as plans for integrating the electrochromic mirror into the system. © 2013 SPIE.

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TYPE Conference YEAR 2013
OSTIScopus

Flat plate concentrators with large acceptance angle enabled by micro cells and mini lenses: performance evaluation

Cruz-Campa, Jose L.; Anderson, Benjamin J.; Gupta, Vipin P.; Tauke-Pedretti, Anna; Cederberg, Jeffrey G.; Paap, Scott M.; Sanchez, Carlos A.; Nordquist, Christopher D.; Nielson, Gregory N.; Saavedra, Michael P.; Ballance, Mark; Nguyen, Janet; Alford, Charles; Riley, Daniel; Okandan, Murat; Lentine, Anthony L.; Sweatt, W.C.; Jared, Bradley H.; Resnick, Paul; Kratochvil, Jay A.

Abstract not provided.

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TYPE Conference YEAR 2013
OSTI
Results 176–200 of 220
Results 176–200 of 220