Determination of energy output losses due to shading of building-integrated photovoltaic arrays using a raytracing technique

Kovach, Andre; Schmid, J.

doi:10.1016/s0038-092x(96)00066-7

Cited by 57 publications

(35 citation statements)

References 4 publications

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“…This is in very good agreement with the operating temperature of a non-shaded PV cell reported in [22], which reaches T=57.2°C with an ambient temperature of 20°C. After the cell is shaded (at time t 1 ), our model estimates a time interval t = t 1 rise by 90˚C, thus reaching a temperature of 150˚C. This result is also in accordance with the experimental data in [23], which reports a thermal behavior of e cell under hot-spot exhibiting a temperature increase of 90°C in approximately 18s.…”

Section: Model Description and Validationsupporting

confidence: 89%

“…When the PV cell is exposed to sunlight, it generates a photocurrent given by [13,14,15]: ] is the area of the PV cell. Diodes D1 and D2 account for the saturation mechanisms in the PV cell [1,8]. Particularly, I D1 is the saturation current due to the diffusion mechanism, while I D2 is the saturation current generated by the recombination in the space charge layer.…”

Section: A Pv Cell Electrical Modelmentioning

confidence: 99%

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Modeling and Detection of Hotspot in Shaded Photovoltaic Cells

Rossi

Omaña

Giaffreda

et al. 2015

IEEE Trans. VLSI Syst.

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obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.The WestminsterResearch online digital archive at the University of Westminster aims to make the research output of the University available to a wider audience. Copyright and Moral Rights remain with the authors and/or copyright owners.Whilst further distribution of specific materials from within this archive is forbidden, you may freely distribute the URL of WestminsterResearch: ((http://westminsterresearch.wmin.ac.uk/).In case of abuse or copyright appearing without permission e-mail repository@westminster.ac.uk TVLSI-00149-2014 1  Abstract-We address the problem of modeling the thermal behavior of photovoltaic (PV) cells undergoing a hot-spot condition. In case of shading, in fact, PV cells, may experience a dramatic temperature increase, with consequent reduction of the provided power. Our model has been validated against experimental data, and has highlighted a counterintuitive PV cell behavior, that should be taken into account to improve the energy efficiency of PV arrays. Then, we propose a hot-spot detection scheme, enabling to identify the PV module that is under hot-spot condition. Such a scheme can be used to avoid the permanent damage of the cells under hot-spot, thus their drawback on the power efficiency of the entire PV system.

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Section: Model Description and Validationsupporting

confidence: 89%

Section: A Pv Cell Electrical Modelmentioning

confidence: 99%

Modeling and Detection of Hotspot in Shaded Photovoltaic Cells

Rossi

Omaña

Giaffreda

et al. 2015

IEEE Trans. VLSI Syst.

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“…One of the earliest applications of daylighting/visualisation software for estimating PV energy output can be found in [199]. In this case, Radiance ray tracing is used to produce irradiation distributions on the PV panel arrays in an urban environment.…”

Section: Building To Urban Scalementioning

confidence: 99%

State-of-the-art review of solar design tools and methods for assessing daylighting and solar potential for building-integrated photovoltaics

Jakica

2018

Renewable and Sustainable Energy Reviews

138

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Solar design can take many different forms across disciplines with different methodologies and goals, ranging from acquiring architectural visual effects to assessing illumination for daylighting and solar radiation potential on building surfaces for PV implementation. Furthermore, a capability of solar design methodologies and tools to accurately and time efficiently simulate light phenomena can greatly influence performance results and design decisions. This is especially important in complex cases such as dense urban settings with the significant surface shadowing, and vertical facades including daylighting devices and photovoltaics. Consequently, choosing a suitable approach and tool for each design phase is essential for achieving unique design and performance goals. This paper was carried out within the framework of IEA-PVPS Task 15 -BIPV and it aims to facilitate this decision for all parties involved in solar design process. Here presented, is an overview of almost 200 solar design tools, analyzing their numerous features regarding accuracy, complexity, scale, computation speed, representation as well as building design process integration in about 50 2D/3D, CAD/CAM and BIM software environments. Furthermore, tools from various fields have been analysed in a broad interdisciplinary context of solar design with a particular attention for being used for Daylighting and Building-Integrated Photovoltaics (BIPV) purposes. This approach should open many new perspectives on a potentially wider multidisciplinary usage and interpretation of solar design tools, sometimes well beyond their initial scope of work.

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“…This can be partly done yet in CAD software in which most products and buildings are designed in the Netherlands. However, previous studies in the field of irradiance simulations in CAD environments [146][147][148] used software based on the raytracing technique, which gave accurate results, but required much processing time. The rendering of a model would cost about 30 minutes to a couple of hours per scene, depending on the complexity of the geometry, using ray-tracing in 3D Studio Max, a typical render tool for industrial designers.…”

Section: C13 April 2014mentioning

confidence: 99%

“…A study of Kovach and Schmid [146] uses the software tool RADIANCE to calculate the shading losses in PV systems by applying the ray-tracing technique. However, this software is less suitable during a design process, because it is not integrated in a CAD environment.…”

Section: C13 April 2014mentioning

confidence: 99%

Modeling and simulation of photovoltaic systems in Indonesia

Veldhuis¹

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Determination of energy output losses due to shading of building-integrated photovoltaic arrays using a raytracing technique

Cited by 57 publications

References 4 publications

Modeling and Detection of Hotspot in Shaded Photovoltaic Cells

Modeling and Detection of Hotspot in Shaded Photovoltaic Cells

State-of-the-art review of solar design tools and methods for assessing daylighting and solar potential for building-integrated photovoltaics

Modeling and simulation of photovoltaic systems in Indonesia

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