release time:2018-05-17 15:30:00 source:clear sunshing
With the worsening of the environment and the deepening of human environmental awareness, photovoltaic power generation is one of the main green energy sources. The number and scale of photovoltaic power stations are also growing. Once the photovoltaic power plant is built, its power generation capacity is basically dependent on the weather. In addition to avoiding the loss of electrical equipment caused by faults, the main way is to clean the surface of the photovoltaic panels, which is pollution and dust. Sand is particularly evident. Therefore, it is necessary and effective to periodically clean the photovoltaic panels under the conditions permitting. Next, we will introduce the importance of photovoltaic panel cleanliness:
1. Effect of dust accumulation on solar photovoltaic power station
Dust is used as a material with a small thermal conductivity and is attached to the surface of the photovoltaic panel to block heat transfer from the photovoltaic panel. This makes it possible that the heat of the photovoltaic panel itself is not released and the temperature of the photovoltaic panel becomes higher and higher, affecting the photovoltaic power generation. The efficiency, at the same time, may also create the risk of local overheating of the panel, ie the “hot spot effect”. The temperature effect of dust accumulation should directly affect the temperature of the components and thus affect the power output of the photovoltaic modules. At the same time, it also leads to safety risks of local overheating of the components.
The corrosive effect of the photovoltaic panel ash deposit: From the overall view of the glass panel of the photovoltaic panel, due to the corrosion of the glass cover plate by the acid or alkaline dust, or the improper cleaning, the surface roughness of the glass cover plate increases, and the reflected light energy increases. The decrease of the energy of the refracted light causes the intensity of the light incident on the photovoltaic cell to decrease, the photoelectric effect to decrease, and the amount of power generation to decrease. Although the corrosion effect of dust deposits is small, the damage to photovoltaic modules is permanent, and it is difficult to repair. Only by strengthening daily routine cleaning and maintenance can the corrosion of photovoltaic panels be minimized.
2. Effect of Adhesive Sludge on Photovoltaic Power Generation
Photocontamination of the photovoltaic panel surface has a significant effect on its power generation efficiency. The principle of its influence can be mainly understood as two aspects: First, the contamination of the surface affects the transmittance of light and thus the amount of radiation received on the surface of the module. The second reason is that the surface of the module is dirty because the distance from the battery sheet is very close, shadows are formed, and the hot spot effect is formed in the local area of the photovoltaic module, thereby reducing the power generation efficiency of the module and even burning the module. When the turbidity on the surface of the module is a partial obstructer such as leaves, dirt, bird droppings, and so on, the principle of action is more likely to be the effect of the hot-spot effect.
Here, I believe we all understand the importance of the cleanliness of photovoltaic panels. Many people can easily ignore this when carrying out photovoltaic power plant maintenance, or only clean once a year, which will greatly reduce the service life of photovoltaic modules. Taken, so everyone must understand clearly the cleaning cycle of photovoltaic panels.
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