Outdoor Test Setup for Concentrating Photovoltaic and Thermal (CPVT) Systems

Helmers, Henning; Boos, Alexander; Jetter, Felix; Heimsath, Anna; Wiesenfarth, Maike; Bett, Andreas W.

doi:10.1063/1.3658320

Cited by 19 publications

(11 citation statements)

References 2 publications

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“…The concentrator setup is a CPVT system that is installed at the outdoor test facility at Fraunhofer ISE [19]. As primary optics, a circular parabolic concentrator (dish) with a diameter of 1.175 m is used.…”

Section: Methodsmentioning

confidence: 99%

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Optical analysis of deviations in a concentrating photovoltaics central receiver system with a flux homogenizer

et al. 2013

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The application of a kaleidoscope as a flux homogenizer to a concentrating photovoltaics system with a central receiver is investigated. The optical setup of a primary dish-type concentrator, a secondary homogenizer optics, and a photovoltaic receiver is simulated using ray tracing. The influence of various deviations from the ideal-namely sunshape (circumsolar radiation), shading, tracking error, and shape of the primary optical concentrator-on the performance of the homogenizer is analyzed quantitatively using the optical efficiency and the normalized standard deviation as a measure of inhomogeneity. Flux distributions for different progressively increasing deviations are discussed qualitatively. Experimental validation of the simulation is presented. It is demonstrated that the performance of the homogenizer is not particularly sensitive to sunshape. If sufficient length is provided, the homogenizer effectively compensates for tracking error, misalignment, and shape deviations of the primary concentrator. Yet despite the presence of the homogenizer, shading due to the holder of the receiver significantly affects the flux distribution at the receiver.

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Section: Methodsmentioning

confidence: 99%

“…Finally, in scenario No. 6, the ideal surface profile of the primary concentrator is replaced by a real surface profile that was measured using the fringe reflection method [19,27]. In the fringe measurement, a tilt of 0.1°of the concentrator was introduced to include a tracking error of 0.1°in the measured shape.…”

Section: B Scenariosmentioning

confidence: 99%

Optical analysis of deviations in a concentrating photovoltaics central receiver system with a flux homogenizer

et al. 2013

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“…Helmers et al [182] set up an outdoor bench for CPVT system characterization and scientific analysis. The system used a parabolic dish as the primary concentrator, and a kaleidoscope was applied as the flux homogenizer.…”

Section: Parabolic/spherical Dish Concentratormentioning

confidence: 99%

A review of concentrated photovoltaic-thermal (CPVT) hybrid solar systems with waste heat recovery (WHR)

Jü

Liao

et al. 2017

Science Bulletin

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“…Typical concentrator solar cell devices in high‐concentration PV modules have dimensions of 1 mm 2 up to 1 cm 2 and operate at concentration levels between 200 and 1500 suns. Even larger area devices are used in parabolic dish mirror systems with dense array receivers . Such receivers may cover an area of 100 cm 2 up to 1 m 2 and operate at intensities of 1000 suns or higher.…”

Section: Introductionmentioning

confidence: 99%

GaInP/AlGaAs metal‐wrap‐through tandem concentrator solar cells

Oliva

Salvetat

Jany

et al. 2016

Progress in Photovoltaics

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III–V multi-junction solar cells are promising devices for photovoltaic applications under very high concentration levels of sunlight. Shadowing losses of the front side metallisation and ohmic resistance losses in the metal grid limit the practical cell size typically to around 1 cm2 at 1000 suns. The use of a full back-contact architecture, similar to the metal-wrap-through (MWT) technology known in silicon photovoltaics, can help to overcome this limitation. Furthermore, positioning both the positive and negative contact pads on the rear side of concentrator solar cells opens the possibility for efficient packaging solutions and the realisation of dense array receivers with low metal shadowing. The MWT technology addresses conventional concentrating photovoltaics as well as combined conventional concentrating photovoltaic-thermal applications and offers specific advantages for large-area devices at high intensities. This work presents the first experimental results for MWT architectures applied to III–V tandem solar cells and discusses specific challenges. An efficiency of 28.3% at 176 suns and 27.2% at 800 suns has been measured for the best MWT Ga0.51In0.49P/Al0.03Ga0.97As tandem solar cells

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Outdoor Test Setup for Concentrating Photovoltaic and Thermal (CPVT) Systems

Cited by 19 publications

References 2 publications

Optical analysis of deviations in a concentrating photovoltaics central receiver system with a flux homogenizer

Optical analysis of deviations in a concentrating photovoltaics central receiver system with a flux homogenizer

A review of concentrated photovoltaic-thermal (CPVT) hybrid solar systems with waste heat recovery (WHR)

GaInP/AlGaAs metal‐wrap‐through tandem concentrator solar cells

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