屋顶光伏阵列对流换热不均匀分布特性及校正研究

IF 7 2区 工程技术 Q1 ENERGY & FUELS
Xusong Tian, Yalan Yin, Jiawei Wang, Fujian Jiang, Wenhui Ji, Jinzhi Zhou
{"title":"屋顶光伏阵列对流换热不均匀分布特性及校正研究","authors":"Xusong Tian,&nbsp;Yalan Yin,&nbsp;Jiawei Wang,&nbsp;Fujian Jiang,&nbsp;Wenhui Ji,&nbsp;Jinzhi Zhou","doi":"10.1016/j.seta.2025.104571","DOIUrl":null,"url":null,"abstract":"<div><div>Due to the wind shielding effect, the convective heat transfer coefficient (CHTC) exhibits a non-uniform distribution across different regions of the rooftop photovoltaic (PV) array. However, existing calculation correlations for CHTC neglected this effect, which may lead to significant errors in predicting the heat transfer and power conversion efficiency (PCE) of the PV array. Therefore, based on the generalized form of Newton’s law of cooling and the validated simulation model, this study conducted numerical investigations under hundreds of test conditions, corrected existing calculation correlations, and compared the prediction accuracy between existing calculation correlations and corrected calculation correlations. Finally, an optimal layout scheme for the rooftop PV array was proposed. The main research results are as follows: (1) Corrected calculation correlations comprehensively account for the effects of installation height, tilt angle, and other critical parameters on the CHTC, and achieve coefficients of determination of no less than 0.8237; (2) Existing calculation correlations exhibit significant prediction deviations exceeding 50 % for PV array temperatures, while corrected calculation correlations achieve substantially improved accuracy with an average deviation of approximately 20 %; (3) Installation height shows the dominant influence on the PV array’s PCE, followed by row spacing, where increasing both parameters enhances airflow to reduce module operating temperatures and consequently improve PCE. The above research findings provide practical guidance for engineering projects and can facilitate the widespread adoption of rooftop PV systems.</div></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"83 ","pages":"Article 104571"},"PeriodicalIF":7.0000,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Research on non-uniform distribution characteristic and correction of convective heat transfer in the rooftop photovoltaic array\",\"authors\":\"Xusong Tian,&nbsp;Yalan Yin,&nbsp;Jiawei Wang,&nbsp;Fujian Jiang,&nbsp;Wenhui Ji,&nbsp;Jinzhi Zhou\",\"doi\":\"10.1016/j.seta.2025.104571\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Due to the wind shielding effect, the convective heat transfer coefficient (CHTC) exhibits a non-uniform distribution across different regions of the rooftop photovoltaic (PV) array. However, existing calculation correlations for CHTC neglected this effect, which may lead to significant errors in predicting the heat transfer and power conversion efficiency (PCE) of the PV array. Therefore, based on the generalized form of Newton’s law of cooling and the validated simulation model, this study conducted numerical investigations under hundreds of test conditions, corrected existing calculation correlations, and compared the prediction accuracy between existing calculation correlations and corrected calculation correlations. Finally, an optimal layout scheme for the rooftop PV array was proposed. The main research results are as follows: (1) Corrected calculation correlations comprehensively account for the effects of installation height, tilt angle, and other critical parameters on the CHTC, and achieve coefficients of determination of no less than 0.8237; (2) Existing calculation correlations exhibit significant prediction deviations exceeding 50 % for PV array temperatures, while corrected calculation correlations achieve substantially improved accuracy with an average deviation of approximately 20 %; (3) Installation height shows the dominant influence on the PV array’s PCE, followed by row spacing, where increasing both parameters enhances airflow to reduce module operating temperatures and consequently improve PCE. The above research findings provide practical guidance for engineering projects and can facilitate the widespread adoption of rooftop PV systems.</div></div>\",\"PeriodicalId\":56019,\"journal\":{\"name\":\"Sustainable Energy Technologies and Assessments\",\"volume\":\"83 \",\"pages\":\"Article 104571\"},\"PeriodicalIF\":7.0000,\"publicationDate\":\"2025-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Sustainable Energy Technologies and Assessments\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2213138825004023\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sustainable Energy Technologies and Assessments","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2213138825004023","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0

摘要

由于风屏蔽效应,屋顶光伏阵列的对流换热系数(CHTC)在不同区域呈非均匀分布。然而,现有的CHTC计算相关性忽略了这一影响,这可能导致PV阵列的传热和功率转换效率(PCE)预测出现重大误差。因此,本研究基于牛顿冷却定律的广义形式和经过验证的仿真模型,在数百种试验条件下进行了数值研究,对现有计算关联进行了修正,并比较了现有计算关联与修正后计算关联的预测精度。最后,提出了屋顶光伏阵列的优化布局方案。主要研究结果如下:(1)修正后的计算相关性综合考虑了安装高度、倾斜角度等关键参数对CHTC的影响,确定系数不小于0.8237;(2)现有计算相关性对光伏阵列温度的预测偏差超过50%,而修正后的计算相关性预测精度显著提高,平均偏差约为20%;(3)安装高度对光伏阵列PCE的影响最大,排间距对PCE的影响其次,增加排间距和安装高度都可以增强气流,从而降低组件的工作温度,从而提高PCE。以上研究结果对工程项目具有实际指导意义,有利于屋顶光伏系统的广泛应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Research on non-uniform distribution characteristic and correction of convective heat transfer in the rooftop photovoltaic array
Due to the wind shielding effect, the convective heat transfer coefficient (CHTC) exhibits a non-uniform distribution across different regions of the rooftop photovoltaic (PV) array. However, existing calculation correlations for CHTC neglected this effect, which may lead to significant errors in predicting the heat transfer and power conversion efficiency (PCE) of the PV array. Therefore, based on the generalized form of Newton’s law of cooling and the validated simulation model, this study conducted numerical investigations under hundreds of test conditions, corrected existing calculation correlations, and compared the prediction accuracy between existing calculation correlations and corrected calculation correlations. Finally, an optimal layout scheme for the rooftop PV array was proposed. The main research results are as follows: (1) Corrected calculation correlations comprehensively account for the effects of installation height, tilt angle, and other critical parameters on the CHTC, and achieve coefficients of determination of no less than 0.8237; (2) Existing calculation correlations exhibit significant prediction deviations exceeding 50 % for PV array temperatures, while corrected calculation correlations achieve substantially improved accuracy with an average deviation of approximately 20 %; (3) Installation height shows the dominant influence on the PV array’s PCE, followed by row spacing, where increasing both parameters enhances airflow to reduce module operating temperatures and consequently improve PCE. The above research findings provide practical guidance for engineering projects and can facilitate the widespread adoption of rooftop PV systems.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Sustainable Energy Technologies and Assessments
Sustainable Energy Technologies and Assessments Energy-Renewable Energy, Sustainability and the Environment
CiteScore
12.70
自引率
12.50%
发文量
1091
期刊介绍: Encouraging a transition to a sustainable energy future is imperative for our world. Technologies that enable this shift in various sectors like transportation, heating, and power systems are of utmost importance. Sustainable Energy Technologies and Assessments welcomes papers focusing on a range of aspects and levels of technological advancements in energy generation and utilization. The aim is to reduce the negative environmental impact associated with energy production and consumption, spanning from laboratory experiments to real-world applications in the commercial sector.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信