Optical Modeling Techniques for Bifacial PV

Jain, Pulkit; Raina, Gautam; Mathur, Siddharth; Sinha, Sunanda

doi:10.1002/9781119785460.ch7

Cited by 2 publications

(6 citation statements)

References 38 publications

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“…It is known that, in dependence on the properties of the cells and on the conditions of installation, bifacial modules may provide PCE improvements above 20% and even above 40% with respect to standard flat modules of equivalent area 56,62 . To simulate the PCE of bifacial modules from a general viewpoint is a complex task, due to the extreme variability of environmental conditions and possible installation geometries that affect the amount of rearside collected albedo irradiation 55,56,58,62,66,67 . For this reason, a quantitative estimation of PCE for the module operated bifacially is outside the scope of the present work.…”

Section: Design Of the Right‐angle‐wedge Spectral Splitting (Raw‐ss) ...mentioning

confidence: 98%

“…56,62 To simulate the PCE of bifacial modules from a general viewpoint is a complex task, due to the extreme variability of environmental conditions and possible installation geometries that affect the amount of rearside collected albedo irradiation. 55,56,58,62,66,67 For this reason, a quantitative estimation of PCE for the module operated bifacially is outside the scope of the present work.…”

Section: Bifacial Operationmentioning

confidence: 99%

“…Moreover, the statistic nature of albedo, its dependence on the type of diffusive and reflective environment, the difficulties in obtaining a proper modeling and quantification for it, and the role of the panels self-shading are additional elements that add complexity to the subject. 56,[58][59][60] The minimization of the selfshading effect is clearly one ingredient for best bifacial efficiency, for which different approaches have been proposed. 55,56,58,61 The coupling of bifaciality and concentrating optics is also a research and innovation subject, with specific focus on LCPV, in view of harvesting of diffused light, though not limited to that.…”

Section: Introductionmentioning

confidence: 99%

“…56,[58][59][60] The minimization of the selfshading effect is clearly one ingredient for best bifacial efficiency, for which different approaches have been proposed. 55,56,58,61 The coupling of bifaciality and concentrating optics is also a research and innovation subject, with specific focus on LCPV, in view of harvesting of diffused light, though not limited to that. 48,53,62,63 In this work we introduce an optical element, as a building block for 4T solar modules operating in hybrid LCPV geometry and SS, so that the dimensions of solar cells can be independently chosen.…”

Section: Introductionmentioning

confidence: 99%

“…The analysis of the installation conditions that optimize the PCE of bifacial modules is a real hot and complex technological topic. Moreover, the statistic nature of albedo, its dependence on the type of diffusive and reflective environment, the difficulties in obtaining a proper modeling and quantification for it, and the role of the panels self‐shading are additional elements that add complexity to the subject 56,58–60 . The minimization of the self‐shading effect is clearly one ingredient for best bifacial efficiency, for which different approaches have been proposed 55,56,58,61 .…”

Section: Introductionmentioning

confidence: 99%

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An asymmetric low concentrator and spectral splitting approach to bifacial four‐terminal photovoltaic modules

Farina

Carlotto

Varas³

et al. 2022

Progress in Photovoltaics

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We introduce the conceptual design of the optical core for a spectral‐splitting and light‐guiding four‐terminal (4T) photovoltaic (PV) module, with appealing features for bifacial operation. We analyze the applicability of the solution and its performance using a commercial ray‐tracing software for direct and diffused solar irradiance at standard AM1.5G spectrum. The core is a right‐angle transparent wedged (RAW) prism. Complementary, two dichroic mirrors are optically coupled to the rear and bottom faces of the wedge to perform the spectral‐splitting (SS) function. Low‐gain concentration in the visible (VIS) band is provided by combining dichroic reflections with achromatic total internal reflection (TIR) at the topmost air‐dielectric interface for light guiding. The module can support 4T heterojunction connection, implemented with wide‐bandgap (WG) solar cells for the VIS and silicon‐based solar cells for the near infrared (NIR). At a geometrical concentration gain CG‐VIS ≈ 4 and wide optical acceptance angle θA ≈ 48°, also VIS diffused light is effectively collected and a spectrally integrated optical efficiency ηo,diff = 62%, (ηo(diff,NIR) =45%, ηo(diff,VIS) = 17%) is estimated. Under direct illumination ηo,dir > 80% is obtained over the whole angular acceptance with a maximum optical efficiency ηo,dir‐MAX ≈ 88.7% at θi = 37°. Low‐concentrating RAW‐SS can work stationary and trackless. The tilt angle for the orientation is set according to the latitude at the installation site, and in the northern hemisphere, it is more north‐oriented with respect to standard panels. The collection of albedo irradiance from the ground is favored, since the scaling coefficient for self‐shading of the module at sun elevation is lower than for standard flat panels of equivalent input area and normally oriented. The decrease in self‐shading is therefore an asset for bifacial operation and specifically effective at lower latitudes where solar irradiance is stronger. The possible applications range from sub‐watt indoor PV and Internet‐of‐Things power suppliers to utility‐scale plants and building‐integrated solutions.

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Section: Design Of the Right‐angle‐wedge Spectral Splitting (Raw‐ss) ...mentioning

confidence: 98%

Section: Bifacial Operationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An asymmetric low concentrator and spectral splitting approach to bifacial four‐terminal photovoltaic modules

Farina

Carlotto

Varas³

et al. 2022

Progress in Photovoltaics

View full text Add to dashboard Cite

show abstract

An Accurate Model for Bifacial Photovoltaic Panels

et al. 2022

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Recently, there has been increasing concerns over bifacial PV (BPV) modules over the conventional monofacial PV (MPV) modules owing to their potential to add extra electrical energy from their rear-side irradiance. However, adding the rear-side irradiance to the front-side irradiance results in the increased nonlinearity of the BPV modules compared to MPV modules. Such nonlinearity makes the conventional methods unable to accurately extract the BPV module parameters. In this context, the precise determination of the BPV module parameters is a crucial issue for establishing energy yield estimations and for the proper planning of BPV installations as well. This paper proposes a new model for the BPV modules based on the MPV modeling, in which a new parameter is added to the MPV model to adjust the value of the model series resistance in order to provide a generic model for BPV modules in both monofacial and bifacial operating regions. Moreover, a new determination method for optimizing BPV model parameters using the recently developed enhanced version of the success-history-based adaptive differential evolution (SHADE) algorithm with linear population size reduction, known as the LSHADE method, is applied. The determination process of the model parameters is adapted using a two-stage optimization scheme to model the full operating range of BPV modules. The accuracy of the obtained parameters using the proposed model is compared with the conventional single-diode and double-diode models of the BPV. The obtained results using the proposed model of the BPV module show the performance superiority and accuracy of the LSHADE method over the existing methods in the literature. Furthermore, the LSHADE method provides the successful and accurate extraction of the global optimized parameters to model MPV and BPV modules. Therefore, the proposed method can provide an accurate model for the whole operating range of BPV that would be beneficial for further studies of their economic and technical feasibility for wide installation plans.

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Optical Modeling Techniques for Bifacial PV

Cited by 2 publications

References 38 publications

An asymmetric low concentrator and spectral splitting approach to bifacial four‐terminal photovoltaic modules

An asymmetric low concentrator and spectral splitting approach to bifacial four‐terminal photovoltaic modules

An Accurate Model for Bifacial Photovoltaic Panels

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