荒漠环境中电池板表面灰尘颗粒力学模型建立
高海拔荒漠地区电池板表面积灰严重制约着光伏发电效率和光伏组件寿命。该文在分析表面能的基础上,假设接触不变形条件下,依据宏观分子间作用理论分析提出了电池板表面灰尘颗粒粘附受力模型。结合青海共和地区电池板表面灰尘主要成分和粒径组成,给出了灰尘受力参数;计算了灰尘颗粒所受的范德华力、静电力及重力,给出由参数改变引起的灰尘受力的变化规律。结果表明:当灰尘颗粒半径较小时,颗粒与电池板间的主要粘附力为范德华力,当灰尘颗粒半径较大时,重力分量则成为主导粘附力,粘附合力取值范围为10-10~10-8 N;Lifshitz常数和分子间平均间距主要影响的是范德华力;灰尘颗粒总的静电力随灰尘颗粒半径的增大而增大,静...
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Published in | 农业工程学报 Vol. 30; no. 16; pp. 221 - 229 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
青海大学机械工程学院,西宁,810016%青海大学机械工程学院,西宁 810016
2014
浙江大学流体动力与机电系统国家重点实验室,杭州 310027%中国科学技术馆,北京,100012 |
Subjects | |
Online Access | Get full text |
ISSN | 1002-6819 |
DOI | 10.3969/j.issn.1002-6819.2014.16.029 |
Cover
Summary: | 高海拔荒漠地区电池板表面积灰严重制约着光伏发电效率和光伏组件寿命。该文在分析表面能的基础上,假设接触不变形条件下,依据宏观分子间作用理论分析提出了电池板表面灰尘颗粒粘附受力模型。结合青海共和地区电池板表面灰尘主要成分和粒径组成,给出了灰尘受力参数;计算了灰尘颗粒所受的范德华力、静电力及重力,给出由参数改变引起的灰尘受力的变化规律。结果表明:当灰尘颗粒半径较小时,颗粒与电池板间的主要粘附力为范德华力,当灰尘颗粒半径较大时,重力分量则成为主导粘附力,粘附合力取值范围为10-10~10-8 N;Lifshitz常数和分子间平均间距主要影响的是范德华力;灰尘颗粒总的静电力随灰尘颗粒半径的增大而增大,静电力的取值小于范德华力和重力分量。对灰尘粘附受力大小及其规律的研究,为高海拔荒漠地区光伏除尘提供理论依据。 |
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Bibliography: | 11-2047/S Along with the booming development of the photovoltaic industry, the later maintenance of photovoltaic power station and the improvement of photovoltaic power generation efficiency have gradually become the focus of attention. Under the condition of blown sand in high altitude desert areas, dust accumulation on the surface of solar panel has become one of the most significant factors which influences the consistency and efficiency of photovoltaic power station. The effects of dust deposition on photovoltaic conversion efficiency and dust removal methods were studied. The mechanism of dust particle adhesion was analyzed at first in this paper. Due to the surface free energy of the dust particle and solar panel, they interacted. The van der Waals force between spherical dust particles and the panel was derived from Lifshitz’s macro molecular interaction theory and the order of magnitudes van der Waals force was calculated. The electrostatic image force was simulated based on two known dust charge empir |
ISSN: | 1002-6819 |
DOI: | 10.3969/j.issn.1002-6819.2014.16.029 |