Maximally concentrating optics for photovoltaic solar energy conversion. Technical progress report, [July 1, 1985--February 15, 1986]

Winston, R; O`Gallagher, J; Ning, X

doi:10.2172/10182423

Title: Maximally concentrating optics for photovoltaic solar energy conversion. Technical progress report, [July 1, 1985--February 15, 1986]

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Abstract

The use of a two-stage concentrator with a fresnel lens primary and a non-imaging dielectric totally internally reflecting secondary, has unique advantages for photovoltaic concentration. This new design has a much larger acceptance angle than the conventional lens-cell concentrating system. In the continuation of this research, an optimally designed prototype which employs a 13.6-cm diameter flat fresnel tons as the primary focusing device, a dielectric compound hyperbolic concentrator (DCHC) as secondary and a 1-cm diameter high-concentration cell for electricity conversion has been built, tested and analyzed. Measurements under sunlight show that it has an angular acceptance of {plus_minus}3.6 degrees, which is dramatically better than the {plus_minus}0.5 degree achievable without a secondary concentrator. This performance agrees well with theoretical ray-tracing predictions. The secondary shows an optical efficiency of (91{plus_minus}2)% at normal incidence. Combining with the primary fresnel tens which has an optical efficiency of (82{plus_minus}2)%, tho two-stage system yields a total optical efficiency of (7l{plus_minus}2)%. The measurement of the system electrical performance yielded a net electrical efficiency of 11.9%. No problems associated with non-uniform cell illumination were found, as evidenced by the excellent fill factor of (79{plus_minus}2)% measured under concentration. The secondary geometrical properties and the optimal two-stage design procedures formore »« less

Authors:: Winston, R; O`Gallagher, J; Ning, X

Publication Date:: Thu Feb 27 00:00:00 EST 1986

Research Org.:: Chicago Univ., IL (United States). Enrico Fermi Inst.

Sponsoring Org.:: USDOE, Washington, DC (United States)

OSTI Identifier:: 10182423

Report Number(s):: DOE/CH/10201-T4
ON: DE93002845

DOE Contract Number:: FG02-84CH10201

Resource Type:: Technical Report

Resource Relation:: Other Information: PBD: 27 Feb 1986

Country of Publication:: United States

Language:: English

Subject:: 14 SOLAR ENERGY; CONCENTRATOR SOLAR CELLS; OPTICAL SYSTEMS; PROGRESS REPORT; FRESNEL LENS; DESIGN; EFFICIENCY; FILL FACTORS; PERFORMANCE; LENSES; TESTING; 140501; PHOTOVOLTAIC CONVERSION

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                    Winston, R, O`Gallagher, J, and Ning, X. Maximally concentrating optics for photovoltaic solar energy conversion. Technical progress report, [July 1, 1985--February 15, 1986].  United States: N. p., 1986. 
        Web.  doi:10.2172/10182423.

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                    Winston, R, O`Gallagher, J, & Ning, X. Maximally concentrating optics for photovoltaic solar energy conversion. Technical progress report, [July 1, 1985--February 15, 1986].  United States.  https://doi.org/10.2172/10182423

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                    Winston, R, O`Gallagher, J, and Ning, X. 1986.  
        "Maximally concentrating optics for photovoltaic solar energy conversion. Technical progress report, [July 1, 1985--February 15, 1986]".  United States.  https://doi.org/10.2172/10182423.  https://www.osti.gov/servlets/purl/10182423.

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@article{osti_10182423,

  title        = {Maximally concentrating optics for photovoltaic solar energy conversion. Technical progress report, [July 1, 1985--February 15, 1986]},

  author       = {Winston, R and O`Gallagher, J and Ning, X},

  abstractNote = {The use of a two-stage concentrator with a fresnel lens primary and a non-imaging dielectric totally internally reflecting secondary, has unique advantages for photovoltaic concentration. This new design has a much larger acceptance angle than the conventional lens-cell concentrating system. In the continuation of this research, an optimally designed prototype which employs a 13.6-cm diameter flat fresnel tons as the primary focusing device, a dielectric compound hyperbolic concentrator (DCHC) as secondary and a 1-cm diameter high-concentration cell for electricity conversion has been built, tested and analyzed. Measurements under sunlight show that it has an angular acceptance of {plus_minus}3.6 degrees, which is dramatically better than the {plus_minus}0.5 degree achievable without a secondary concentrator. This performance agrees well with theoretical ray-tracing predictions. The secondary shows an optical efficiency of (91{plus_minus}2)% at normal incidence. Combining with the primary fresnel tens which has an optical efficiency of (82{plus_minus}2)%, tho two-stage system yields a total optical efficiency of (7l{plus_minus}2)%. The measurement of the system electrical performance yielded a net electrical efficiency of 11.9%. No problems associated with non-uniform cell illumination were found, as evidenced by the excellent fill factor of (79{plus_minus}2)% measured under concentration. The secondary geometrical properties and the optimal two-stage design procedures for various primary- cell combinations were systematical studied. A general design principle has been developed.},

  doi          = {10.2172/10182423},

  url          = {https://www.osti.gov/biblio/10182423},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Feb 27 00:00:00 EST 1986},

  month        = {Thu Feb 27 00:00:00 EST 1986}

}

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