| Ash deposition has a great influence on the efficiency of solar photovoltaic power generation.Because of the existence of ash deposit,which blocked the incidence of sunlight,but also affected the heat dissipation of photovoltaic modules,further affecting the photovoltaic power generation efficiency.Therefore,an effective ash removal scheme is the necessary operation and maintenance means to improve the efficiency of photovoltaic power generation and the income of photovoltaic power generation enterprises.Based on the basic principle of photovoltaic power generation and the structure of photovoltaic modules,this paper studies the causes of ash deposition on the surface of photovoltaic panels and its impact on photovoltaic power generation efficiency.At the same time,the widely used ash cleaning schemes are compared and analyzed to find out the shortcomings of various ash cleaning schemes.In order to study the influence of different ash cleaning schemes on power generation efficiency,this study takes the photovoltaic power generation project on the top floor of Yifu Building of Inner Mongolia University of Science and Technology as the experimental object.Based on the widely used water jet dust removal technology and dry dust removal technology.The advantages of the two technologies are integrated into a set of comprehensive dust removal equipment to be tested.In order to test the effect of water jet technology,dry dust removal technology and comprehensive dust removal technology,114 photovoltaic panels were divided into three groups,and orthogonal experiments were carried out with different parameters of each dust removal scheme as factors.By recording the dust removal effect of three dust removal schemes before and after adjustment of different parameters,and taking the percentage of power generation increase as an index,the analysis was carried out.The test results show that the average power of power generation can be increased by 5.01% by water jet scheme,4.34% by dry dust removal scheme and 5.84% by comprehensive dust removal scheme.Through comparative analysis,the comprehensive dust removal scheme avoids the dust accumulation on the surface of photovoltaic panels caused by water evaporation and the phenomenon of electrostatic secondary adsorption of dust caused by dry dust removal.The data obtained from the comprehensive dust removal scheme show that the contact distance between the brush and the photovoltaic panel has the greatest impact on the dust removal effect,followed by the travel speed of the equipment.At the same time,the Origin software is used to fit the percentage relationship between the parameters involved in the comprehensive dedusting equipment and the power generation efficiency improvement,and the empirical formula is obtained,which provides a reference basis for equipment optimization.Finally,combined with the actual project of a scientific and technological greenhouse,using the basic principles and methods of Engineering economics,the paper makes an empirical analysis of the cleaning vehicle dust removal method and the comprehensive equipment dust removal method studied in this paper.By comparing the two methods of dust removal,the incremental costs and benefits brought by capital investment and power generation efficiency improvement during the 25-year operation of the project are calculated respectively.The final empirical conclusion is that the benefit of comprehensive dust removal equipment is far greater than that of cleaning vehicle dust removal.At the same time,the emission of atmospheric particulate matter is calculated according to the amount of standard coal corresponding to the unit power generation,and then the effect of energy saving and emission reduction of different dust removal schemes is evaluated. |
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