Charged photovoltaic glass produces an electrostatic field.The electrostatic field exerts an electrostatic force on dust particles,thus making more dust particles deposited on the glass.In this paper,the contact elect...Charged photovoltaic glass produces an electrostatic field.The electrostatic field exerts an electrostatic force on dust particles,thus making more dust particles deposited on the glass.In this paper,the contact electrification between the deposited dust particles and the photovoltaic glass is studied.Meanwhile,the surface charge density model of the photovoltaic glass and the electrostatic force of charged particles are analyzed.The results show that with the increasing of the particle impact speed and the inclination angle of the photovoltaic panel,the charges on particles increase to different degrees.Under a given condition,the electrostatic forces acting on the charged particles at different positions above the glass plate form a bell-shaped distribution at a macro level,and present a maximum value in the center of the plate.As the distance between the particle and the charged glass decreases,the electrostatic force exerted on the particle increases significantly and fluctuates greatly.However,its mean value is still higher than the force caused by gravity and the adhesion force,reported by some studies.Therefore,we suggest that photovoltaic glass panels used in the severe wind-sand environment should be made of an anti-static transparent material,which can lessen the dust particles accumulated on the panels.展开更多
The DC energy produced by photovoltaic （PV） modules can change depending on the cell type, module components and module technology. The cell efficiency, sensitivity of the cell to light, recombination losses and how...The DC energy produced by photovoltaic （PV） modules can change depending on the cell type, module components and module technology. The cell efficiency, sensitivity of the cell to light, recombination losses and how much the light reflects within the cell will affect the amount of produced energy. In addition, the energy produced will change depending on what wavelength light and how much can be transmitted through the front glass and encapsulant and how much light is reflected from back encapsulant and back cover. The front glass transmissivity, patterned surface and existence of ARC （anti-reflective coating） are all very important. In this research project, 14 modules were tested： 4 modules Glass/Glass （Perc Mono Cell）, 4 modules Glass/Ceramic （Perc Mono Cell）, 2 modules Glass/Glass bifacial （HIT Cell）, 1 module Standard （Framed, Mono-n type Cell）, 2 modules Standard （Framed, Poly Cell）, 1 module Standard （Framed, Perc Mono Cell）. This paper compares the normalized Wh/Wp ratios of the different modules under low irradiance （morning and afternoon light） and analyzes and investigates the obtained results as per the cell type used, module components and module technology.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.12064034 and 11562017)the Leading Talents Program of Science and Technology Innovation in Ningxia Hui Autonomous Region,China(Grant No.2020GKLRLX08)+1 种基金the CAS Light of West China Program(Grant No.XAB2017AW03)the Key Research and Development Program of Ningxia Hui Autonomous Region,China(Grant No.2018BFH03004).
文摘Charged photovoltaic glass produces an electrostatic field.The electrostatic field exerts an electrostatic force on dust particles,thus making more dust particles deposited on the glass.In this paper,the contact electrification between the deposited dust particles and the photovoltaic glass is studied.Meanwhile,the surface charge density model of the photovoltaic glass and the electrostatic force of charged particles are analyzed.The results show that with the increasing of the particle impact speed and the inclination angle of the photovoltaic panel,the charges on particles increase to different degrees.Under a given condition,the electrostatic forces acting on the charged particles at different positions above the glass plate form a bell-shaped distribution at a macro level,and present a maximum value in the center of the plate.As the distance between the particle and the charged glass decreases,the electrostatic force exerted on the particle increases significantly and fluctuates greatly.However,its mean value is still higher than the force caused by gravity and the adhesion force,reported by some studies.Therefore,we suggest that photovoltaic glass panels used in the severe wind-sand environment should be made of an anti-static transparent material,which can lessen the dust particles accumulated on the panels.
文摘The DC energy produced by photovoltaic （PV） modules can change depending on the cell type, module components and module technology. The cell efficiency, sensitivity of the cell to light, recombination losses and how much the light reflects within the cell will affect the amount of produced energy. In addition, the energy produced will change depending on what wavelength light and how much can be transmitted through the front glass and encapsulant and how much light is reflected from back encapsulant and back cover. The front glass transmissivity, patterned surface and existence of ARC （anti-reflective coating） are all very important. In this research project, 14 modules were tested： 4 modules Glass/Glass （Perc Mono Cell）, 4 modules Glass/Ceramic （Perc Mono Cell）, 2 modules Glass/Glass bifacial （HIT Cell）, 1 module Standard （Framed, Mono-n type Cell）, 2 modules Standard （Framed, Poly Cell）, 1 module Standard （Framed, Perc Mono Cell）. This paper compares the normalized Wh/Wp ratios of the different modules under low irradiance （morning and afternoon light） and analyzes and investigates the obtained results as per the cell type used, module components and module technology.
