沙塵在太陽能光伏組件表面的沉降與沖蝕行為研究
[Abstract]:With the development of social economy, the demand for energy is increasing, and the large amount of energy consumption has directly led to the more and more serious air pollution problem in the whole country in recent years. Solar energy is a clean, harmless and potential renewable energy, which is favored by all walks of life. The region with better solar energy resources in China is the northwest region, which is very conducive to the large-scale development and utilization of solar energy resources, but desertification and desertification are more serious in this area. Due to the characteristics of windy and sandy climate, the sand particles carried in the wind will cause sedimentation and erosion on the surface of solar photovoltaic module. The mixed model and DPM model in Fluent are used to simulate the sedimentation and erosion behavior of sand dust on the surface of photovoltaic module. The main contents and results are as follows: (1) the influence of dust volume fraction on the sand deposition distribution on the surface of photovoltaic module is analyzed. The results show that the settlement distribution of sand dust on the surface of the assembly is the same with different inlet volume fraction, but the volume fraction of each part is different. The volume fraction of the maximum settlement area is 1.14 times of that of the inlet volume fraction. (2) the effects of the wind speed of the incoming flow and the installation inclination of the solar photovoltaic module on the sand deposition and erosion rate distribution on the surface of the photovoltaic module are analyzed. The results show that with the increase of wind speed, the sedimentation and stratification of sand dust on the surface of the module become obvious, and the maximum erosion rate increases. With the increase of installation inclination, the sand settling on the module surface is more uniform, and the maximum erosion rate is reduced. (3) the influence of sand particle size on the sand deposition and erosion rate distribution on the surface of photovoltaic module is analyzed. The results show that when the installation angle of photovoltaic module is less than 45 擄, the sedimentation becomes more uniform with the increase of dust particle size, and when the inclination angle is greater than 45 擄, the sedimentation of sand dust presents the characteristics of dispersion and concentration. The settlement distribution of the mixed particle size is mainly determined by the larger particle size phase. With the increase of sand particle size, the maximum erosion rate does not change much, which indicates that the particle size is not the main factor affecting the erosion rate. (4) the sedimentation amount and maximum sedimentation density of sand dust on the surface of the module are calculated. The results show that the settlement increases with the increase of the installation inclination of the photovoltaic module, and decreases with the increase of the wind speed when the inclination angle is constant. The maximum settlement density increases with the increase of wind speed. When the installation angle is 45 擄, the maximum settlement density reaches the maximum. (5) the erosion rate distribution of wind direction angle on the surface of photovoltaic module is analyzed. The results show that the surface erosion rate increases with the increase of wind direction angle, and reaches the maximum value when wind direction angle is 75 擄. (6) the influence of sand mass flow on the surface erosion rate distribution of photovoltaic module is analyzed. The results show that the maximum erosion increases first and then fluctuates with the increase of mass flow rate, and reaches the maximum when the mass flow rate is 0.35kg/s.
【學(xué)位授予單位】:內(nèi)蒙古工業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TM914.4
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