Impact of PV module configuration on energy yield under realistic conditions

Thomson, Andrew; Haedrich, Ingrid; Qian, Jiadong

doi:10.1007/s11082-017-0903-0

Cited by 13 publications

(4 citation statements)

References 18 publications

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“…Solar modules can operate in non‐ideal conditions, which impact the module performance and potentially speed up performance degradation. Partial shading and cell cracks can lead to a non‐uniform reduction in cell current generation in a solar module.…”

Section: Introductionmentioning

confidence: 99%

Two‐Dimensional Hot Spot Temperature Simulation for c‐Si Photovoltaic Modules

Qian

Thomson

Blakers

2018

Physica Status Solidi (a)

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A two‐step method to simulate the spatially resolved temperature of a partially shaded cell in a crystalline silicon photovoltaic (PV) module is presented and tested. First, an efficient module electronic simulation tool computes the operating conditions of a module's constituent cells. Second, a two‐dimensional finite‐element analysis simulation, utilizing forward‐, and revers‐bias electroluminescence measurements, is performed to spatially resolved cell temperature. With an outdoor experiment, un‐encapsulated cell temperatures are directly measured under controlled heat transfer conditions. A peak local cell temperature of 144 °C is observed on a multi crystalline silicon cell dissipating 54 W heat in the experiment, 57 °C higher than the result from a non‐spatially resolved simulation. Experimental results indicate cells without significant Ohmic shunts are suitable for temperature simulation with the aid of reverse bias electroluminescence imaging, which yields a maximum temperature prediction error of less than 15 °C. However, simulation for cells with significant Ohmic shunts is prone to underestimate the cell temperature by up to 45 °C. Multiple shading fractions from 12 to 80% lead to severe heating scenarios in such case.

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Section: Introductionmentioning

confidence: 99%

Two‐Dimensional Hot Spot Temperature Simulation for c‐Si Photovoltaic Modules

Qian

Thomson

Blakers

2018

Physica Status Solidi (a)

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“…Tüm bu çalışmalara ek olarak son birkaç yıldır güneş modülleri için yeni bir teknoloji olan yarım PV hücrelerin, hücreden modüle kayıpları azalttığı bildirilmektedir [19,20,21]. Bu teknoloji direnç kayıplarına neden olan akımı yarıya indirmektedir.…”

Section: Rc(kesik) = Nrc(tam)unclassified

Yarım ve tam fotovoltaik hücreleri ile tasarlanan güneş enerjisi panellerinin toplam verimliliğini etkileyen parametrelerinin incelenmesi

DUMAN¹

2022

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Güneş enerjisi (GE), küresel çevre endişelerini azaltmak ve artan enerji talebini karşılamak için en umut verici yenilenebilir enerji kaynaklarından biri olmuştur. Güneş enerjisinden farklı şekillerde yararlanılmaktadır. Bunlardan biride fotovoltaik (PV) hücrelerdir. Fotovoltaik hücreler güneş enerjisini doğrudan elektrik enerjisine dönüştüren yarıiletken malzemelerdir. Geleneksel fotovoltaik modüller tam PV hücreler ile modellenmektedir. Günümüzde ise yeni bir teknoloji olan yarım hücreli modül kullanımı hızla artmaktadır. Yarım PV hücrelerin tam PV hücrelere göre çeşitli avantajları olmasına rağmen, bazı üretim dezavantajları da vardır. Bu çalışmada kapsamlı bir literatür incelemesi sonucu yarım ve tam hücreli PV modüllerin toplam verimliliğini etkileyen parametreler karşılaştırılarak yarım hücreli PV modüllerin, düşük güç kaybı, azaltılmış gölge duyarlılığı, fiyat performans oranının yüksek olması, daha az sıcak nokta etkisi ve iyileştirilmiş ısı dağılımı gibi tam hücrelere göre üstünlüklerinin gösterilmesi amaçlanmaktadır. Bunlara ek olarak yarım ve tam PV hücrelerinin verimlilikleri, üretim süreçleri ve diğer bazı dezavantajları hakkında da bilgiler verilmektedir.

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“…Our previous work [12][13][14][15] developed and validated a cellto-module-yield (CTMY) model to predict the annual energy yield of crystalline silicon solar modules in any environment (figure 1). The model was aimed specifically at understanding and quantifying the optical, thermal, and electrical effects of embedding solar cells into a full module to accurately determine the effects caused by the interaction of module and cell design.…”

Section: Introductionmentioning

confidence: 99%

Impact of angular irradiance distributions on coupling gains and energy yield of cell interconnection designs in silicon solar modules in tracking and fixed systems

Haedrich¹

2021

J. Phys. D: Appl. Phys.

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Cell interconnector designs such as light redirecting films (LRFs) and various geometric ribbon layouts are all aimed at improving the performance of crystalline silicon solar modules. However, due to the usually specular reflecting surface, the angular-dependent module performance, which is typically quantified with an incidence angle modifier, depends on the rotation of the module. We find that typical power measurements under standard test conditions at 1000 W m−2 and 25 °C cell temperature are not suited to identify the best performing design in real-world conditions. In this work, we therefore determine the optimum ribbon geometry based on its simulated energy yield in common installation configurations for solar modules based on industry-standard full and half-cut solar cells. We compare the effects of planar, triangular, LRFs, pentagonal and wire ribbon geometries, as well as fixed optimal inclination, building-integrated (façade), and single-axis tracking installation scenarios of modules in portrait and landscape orientation. Energy yield gains of 1.8% can be achieved for full cell modules with LRFs or pentagonal ribbons in single-axis tracking installation compared to a reference module with five planar ribbons. Critically, we find that changing the module orientation to landscape reduces this energy yield gain by nearly 50% for the modules with LRFs. This directional dependence is significantly reduced with the pentagonal ribbon structure. The installation scenario can have a similarly dramatic impact. The expectation of power gains for certain designs inferred from standard test conditions may not only show significantly lower gains in annual energy yield, but may even lead to yield losses, especially for building-integrated photovoltaic systems. For a typical full-cell module, for example, we have found that LRFs perform 2.5% better than standard planar ribbons under standard test conditions but can result in a 0.2% lower annual yield in a façade installation. Therefore, to fully evaluate the effectiveness of a specific ribbon design, the annual energy yield must consider the angular irradiance distribution and weather conditions at a specific location, the installation scenario, and the module orientation.

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Impact of PV module configuration on energy yield under realistic conditions

Cited by 13 publications

References 18 publications

Two‐Dimensional Hot Spot Temperature Simulation for c‐Si Photovoltaic Modules

Two‐Dimensional Hot Spot Temperature Simulation for c‐Si Photovoltaic Modules

Yarım ve tam fotovoltaik hücreleri ile tasarlanan güneş enerjisi panellerinin toplam verimliliğini etkileyen parametrelerinin incelenmesi

Impact of angular irradiance distributions on coupling gains and energy yield of cell interconnection designs in silicon solar modules in tracking and fixed systems

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