Simulation Wind Load And Sand-dust Deposition Surround The Solar Photovoltaic Modules

Solar photovoltaic power generation for its safe, reliable, long-term, non-polluting and other advantages have a rapid development in the process of renewable energy sources to replace fossil energy sources. Current research for increasing the utilization ratio of solar photovoltaic technology has already reached a bottleneck stage, people are turning to improve security and high-efficiency in the process of solar photovoltaic system operation and maintenance. In solar power technology industry more mature countries, such as the United States and Spain are formed according to different climate, landscape environment design principles.The northwest region is the centre of without electricity in our country, but also has abundant solar resources and cheap land resources of this advantage, make the solar photovoltaic industry flourish here. However, windy and sandy climate characteristics of northwest are brought hidden trouble to run efficiently and safety for solar photovoltaic modules. This topic through the numerical simulation method to simulate wind load condition of S275 type polycrystalline silicon photovoltaic modules in net wind field, dust particle are added on the basic, to analyze the various factors influencing the settlement of sand and dust around the photovoltaic modules, the main content includes the following aspects:(1)First explore the numerical analysis method and the follow theory of the net wind and wind-blown-sand two phase flow field, analysis of the dust particles force,physical settlement model, choose k-ε model and Eulerian-mixture model under the guidance of theory, according to the steps to establish the finite element analysis calculation model and solving;(2)Simulation in 10 m/s wind speed velocity field distribution around photovoltaic modules in different installation angle, and by comparing to the influence of the wind flow direction to the surface pressure distribution of photovoltaic modules, make the surface pressure as the key research when wind direction is dorsal, analysis impact of the installation angle and wind speed to the surface pressure of photovoltaic modules;(3)It is defined the angle between direction of the wind flow and symmetrical face of photovoltaic module as wind angle, simulation the influence of wind angle to velocity field and surface pressure distribution of solar photovoltaic modules when installation angle is 60 °, wind speed is 10 m/s;(4)On the basis of the net wind field simulation to join the second phase- dust particle phase, assumes no relative slip between sand and gas phases, and under the premise of no interaction between them, then analysis of photovoltaic modules installation angle and the angle of wind direction, wind speed and sand-dust particle size and concentration on the effect of dust settling in the photovoltaic modules flow field, analyzes dust settling around the photovoltaic modules when the particle size mixing;Above research for the further analysis of sand erosion of PV modules to lay thefoundation, as well as provides a reference to the design standards for solar photovoltaic system suitable for northwest China climate and landscape environment.