A coupled optical-electrical-thermal model of the bifacial photovoltaic module
A coupled optical-electrical-thermal model of the bifacial photovoltaic module
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DOI：
10.1016/j.apenergy.2019.114075
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发表时间：
2020-01-15
期刊：
影响因子：
11.2
通讯作者：
Zhang, Yijie
中科院分区：
文献类型：
--
作者：
Gu, Wenbo;Ma, Tao;Zhang, Yijie
双面光伏（PV）技术因其可以同时收集正反两面的太阳光实现高发电量而近年来在全球市场流行，但学界对这项新技术尤其是多物理场仿真的理论研究关注有限。本文开发了双面光伏组件的综合光电热模型，其中通过光学模型获得倾斜前后表面的全局辐照度，通过热模型获得电池温度，并通过电模型获得功率输出。经过验证，采用耦合模型进行日和年性能估算，晴天和阴天双面增益分别为25.58%和28.21%，香港和上海的年双面增益超过22%。此外，发现由于漫射率较高，低辐照度下的双面增益相对较高，这表明双面组件在适应各种天气条件（尤其是阴天）方面具有优势。此外，考虑各种安装和天气参数对光伏发电的影响，提出了一些优化双面组件的建议。跟踪型双面组件安装在最佳倾斜角度，高反照率、高程、辐照度和风速，但环境温度低，可以获得高发电量，而朝东安装的双面组件，高反照率、高程、高程、辐照度、风速、环境温度和风速，可以获得高双面增益。
The bifacial photovoltaic (PV) technology has become prevalent in the global market in recent years as it can simultaneously collect the sunlight from both front and rear sides to achieve high power generation, however, there is limited attention from academic circle on this new technology particularly theory study in multiphysics simulation. This paper develops a comprehensive optical-electrical-thermal model for the bifacial PV module, in which the global irradiances of the tilted front and rear surfaces are obtained through the optical model, the cell temperature through the thermal model, and the power output through the electrical model accordingly. After validation, the coupled model is employed to conduct daily and yearly performance estimations, demonstrating 25.58% and 28.21% of the daily bifacial gain for sunny and cloudy days, respectively, and more than 22% of the yearly bifacial gain for Hong Kong and Shanghai. Besides, it is found that the bifacial gain under low irradiance is relatively high due to high diffuse fraction, indicating that bifacial modules have an advantage in adapting to various weather conditions, especially cloudy days. Furthermore, some suggestions are proposed to optimize the bifacial module by considering the effects of various installation and weather parameters on the PV generation. A tracking bifacial module, installed at an optimum tilt angle with high albedo, elevation, irradiance and wind velocity, but low ambient temperature, could achieve high energy yield, while a bifacial module facing east with high albedo, tilt angle, elevation, diffuse fraction, ambient temperature and wind velocity could achieve high bifacial gain.