Performance of photovoltaic panels with different inclinations under uniform thermal loading

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2024-10-24 DOI:10.1016/j.ijthermalsci.2024.109489

Yu Wang , Chengming Xiao , Chiara Bedon

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引用次数: 0

Abstract

Integrating photovoltaic (PV) panels with different tilt angles in building envelopes or roofs is widely employed for environmental sustainability. However, little is known about the influence of different tilt angles on the thermal failure of the photovoltaic façades or roofs in fire conditions. A total of 15 four-edge shielded PV panels (300 × 300 × 4.7 mm³), with five different inclinations of 0°, 15°, 30°, 45° and 60°, were heated to fail using a uniform radiant panel. Measurements were taken to track glass thermal breakage, surface temperatures, incident heat flux and failure characteristics. The glass fracture and pyrolysis of the internal thermoplastic materials were observed under thermal radiation. The average breakage time of glass in PV panels showed an increasing trend with increasing inclination of the PV panels. Moreover, when the PV panels were tilted beyond 30°, the time to failure increased more significantly. The maximum temperature difference and heat flux that the PV panels can withstand were primarily measured within the range of 61–84 °C and 8–15 kW/m², respectively. Finally, the test results were simulated by a finite element method (FEM) model, calculating the heat transfer and thermal stress of PV panels: the average errors concerning temperature distributions and failure times were smaller than 15 % compared with the experimental results.

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均匀热负荷下不同倾斜度的光伏电池板的性能

为了实现环境的可持续发展，在建筑围护结构或屋顶中广泛采用不同倾斜角度的光伏（PV）板。然而，人们对不同倾斜角度在火灾条件下对光伏外墙或屋顶热失效的影响知之甚少。共使用 15 块四边屏蔽光伏板（300 × 300 × 4.7 mm3），有 0°、15°、30°、45° 和 60°五种不同的倾斜角度，使用均匀辐射板加热至失效。对玻璃热破裂、表面温度、入射热通量和失效特征进行了跟踪测量。在热辐射条件下，观察了玻璃破裂和内部热塑性材料热解的情况。光伏板玻璃的平均破裂时间随着光伏板倾斜度的增加而呈上升趋势。此外，当光伏板倾斜度超过 30° 时，玻璃破裂时间的增加更为显著。光伏板可承受的最大温差和热通量主要是在 61-84 °C 和 8-15 kW/m2 范围内测得的。最后，用有限元法（FEM）模型模拟了测试结果，计算了光伏板的传热和热应力：与实验结果相比，温度分布和失效时间的平均误差小于 15%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.