2020, 37(3): 12-23.
In this paper, the influence of different windshield wall combinations on the wind pressure of PV array panels is studied by using CFD numerical simulation technology. By comparing the wind pressure distribution cloud map and the streamline map near the photovoltaic panel surface, we find that the blocking of the incoming air by the windshield wall will change the airflow vortex between the photovoltaic arrays, thereby affecting the panel surface wind pressure acting on the photovoltaic array. The direct blocking of the front windshield A to the incoming atmosphere causes the airflow between the first and second rows of photovoltaic arrays to diverge, thereby reducing the wind pressure of the first and second rows of photovoltaic arrays. The back windshield wall C can block the airflow from flowing back to the third row of photovoltaic arrays, avoiding the direct effect of the returning atmosphere on the lower deck of the third row of photovoltaic arrays. The side windshield wall B enables the airflow vortex between the arrays to move toward the top of the array, thereby reducing the positive pressure acting on the surface of the photovoltaic array. By comparing the different windshield wall combinations, we found that the windshield wall AD combination can effectively reduce the wind pressure on the first and second rows of photovoltaic arrays, but it will increase the positive pressure on the third row of photovoltaic arrays, the windshield AC The combination can effectively reduce the wind pressure of the first and third rows of photovoltaic arrays, but has less impact on the second row of photovoltaic arrays. The windshield ADC combination not only inherits the advantages of the above combination, but also compensates for the shortcomings of the above combination. Therefore, when the wind power wall is installed in the photovoltaic power station, the upper windshield wall should be arranged around the photovoltaic array.
