Northwest China is rich in solar energy resources, with dry climate, less rainfall and long direct sunlight. However, frequent sand and dust weather has brought great trouble to solar power generation.

各种问题可见，分布式屋顶项目，污染源多面广，分布分散，污染种类繁多。

Various problems can be seen. Distributed roof projects have a wide range of pollution sources, scattered distribution and various types of pollution.

积灰污染对光伏发电的影响很大。

Ash pollution has a great impact on photovoltaic power generation.

尘埃污染分类

Dust pollution classification

1.天然粉尘

1. Natural dust

沙尘，灰尘等

Sand, dust, etc

分布式光伏发电

Distributed photovoltaic power generation

2.油性粉尘。

2. Oily dust.

常见于化工厂和机械加工厂。

It is common in chemical plants and mechanical processing plants.

3.金属粉尘。

3. Metal dust.

长时间积聚难以清除自然粉尘，常见于钢厂、机械加工。

It is difficult to remove natural dust accumulated for a long time, which is common in steel mills and machining.

4.有机物粉尘。

4. Organic dust.

长时间积难以清洗，组件玻璃表面形成腐蚀，常见于木材厂、纺织厂、鸟类栖息地。

It is difficult to clean for a long time, and the surface of component glass forms corrosion, which is common in wood mills, textile mills and bird habitats.

5.矿物粉尘。

5. Mineral dust.

附着力低，与雨水和自然粉尘混合会增加清洁难度，常见于石材厂和水泥厂，长期堆积与雨水混合会产生板结和钙化。酸或碱性物质的存在会腐蚀组件框架和组件玻璃。

Low adhesion, mixing with rainwater and natural dust will increase the difficulty of cleaning, which is common in stone plants and cement plants. Long-term accumulation and mixing with rainwater will cause hardening and calcification. The presence of acid or alkaline substances will corrode the component frame and component glass.

灰尘污染的影响

Impact of dust pollution

1.透光率降低，零件积灰会遮挡阳光，导致零件电池片接收到的太阳辐射能量降低。

1. The light transmittance is reduced, and the part dust will block the sun, resulting in the reduction of the solar radiation energy received by the part battery.

2.反射率上升，酸性或碱性积灰会引起组件玻璃的腐蚀，即使被腐蚀的玻璃没有灰尘遮挡，也会引起部分太阳辐射腐蚀后的凹槽反射。

2. The increase of reflectivity, acid or alkaline ash deposition will cause the corrosion of component glass. Even if the corroded glass is not covered by dust, it will also cause the reflection of some grooves after solar radiation corrosion.

3.积灰带引起的热斑效应使局部玻璃温度升高。同时，积灰带中的杂质和钠盐在高温下会损坏涂层，形成不可恢复的彩虹带。即使积灰带被冲洗干净，该区域的光透射率也会下降。

3. The hot spot effect caused by the ash deposition zone causes the local glass temperature to rise. At the same time, impurities and sodium salts in the ash deposit zone will damage the coating at high temperature, forming an unrecoverable rainbow zone. Even if the ash deposit zone is washed clean, the light transmittance of this area will also decrease.

4.积灰带导致下缘玻璃表面电阻降低，分布式光伏发电从玻璃表面到铝框的漏电流增大，下端电池片PID衰减高。

4. The ash deposition zone causes the lower glass surface resistance to decrease, the leakage current from the glass surface to the aluminum frame of distributed photovoltaic power generation increases, and the PID attenuation of the lower cell is high.