Dynamic Mechanism of Secondary Wind and Sand Hazard Interfered by Photovoltaic Plant in Sandy Area
Abstract
In order to explain the dynamic mechanism of sand erosion and accumulation of sandy surface under the interference of solar facilities. The average wind speed of heights (0-310cm) around the photovoltaic panels were observed simultaneously in the 220MW photovoltaic plant in the Hobq Desert. Results showed that: Under the action of west wind , the wind speed of 20cm, 50cm and 100cm height varied violently around the photovoltaic panels, while the wind speed changed relatively gentle at the heights of 200cm and 310cm. The change of wind speed is the most significant at 20cm near surface, and the average wind speed around the panels was as follows: between panels > behind panels > under panels, and the wind speed of between panels was 1.23 times as much as under panels. Due to the "venturi effect", the acceleration zone was formed in front of the panels. The near surface of the before panels formed a deceleration zone by photovoltaic facilities blocking, and the upper air flow was lifted by the surface of the panels and recovered rapidly. The back of panels was also affected by the base column, the near surface wind speed decreased significantly, while the upper air flow was less affected by solar facilities. Under the combined action of pressure difference on both sides and west wind of the between panels , the direction of the before panels air flow inclined to the southwest. The shear force to the surface was increased under the action of guide, and then a strong erosion occurred. Finally, the wind erosion trench with the before panels as the axis and the accumulated sand ridge geomorphology were formed the between panels.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMGC21F1296G
- Keywords:
-
- 1632 Land cover change;
- GLOBAL CHANGE;
- 1809 Desertification;
- HYDROLOGY;
- 4323 Human impact;
- NATURAL HAZARDS;
- 4329 Sustainable development;
- NATURAL HAZARDS