The photovoltaic power station is inseparable from the light. Many people may ask, can the tropical area be the longest sunshine time? So is there any advantage in building photovoltaic power plants in the tropics? What about the specific situation?
1 high temperature
The tropics are of course very hot, and the annual average temperature of 20 °C or more is a common occurrence. The photovoltaic module is just a thing that is afraid of heat. As the temperature increases, his photoelectric conversion efficiency is also decreasing. The power temperature coefficient is generally around -0.4%/°C. At this time, the common 2% and 3% temperature loss in the country can be doubled in the tropics. 7% and 8% are common, and more than 10% is not impossible. This will have a great impact on the final power generation. .
2 latitude
The latitude of the tropics is low, and the corresponding optimal inclination angle is also low. This makes the ratio of the total radiation of the slope/horizon in the tropics very small, which narrows the gap between the tropics and other regions. For example: According to Meteonorm data, the total annual radiation level of Singapore's water level is about 1635 kWh/m2, and the total horizontal radiation of Datong, Shanxi is about 1481 kWh/m2. It seems that the radiation situation in Singapore is better than that in Shanxi Datong. However, Singapore's latitude is 1.37°, and the ratio of the total radiation to the local slope/horizon is about equal to 1, which means that the optimal dip radiation in Singapore is also equal to 1,635 kWh/m2; while the latitude of Shanxi Datong is 40.1°, according to the local area. The ratio of the total radiation of the slope/horizon is about 1.20, that is, the optimum dip radiation in the Datong area of the mountain is 1775 kWh/m2. The total radiation in the Datong area of Shanxi has surpassed that of Singapore in the tropics, and the power generation will be higher than that of Singapore.
Therefore, it cannot be blindly considered that there is a great advantage in tropical photovoltaic power generation. Of course, although there is no advantage in the tropical region in terms of power generation, there are some advantages to building photovoltaics in other areas in the tropics. For example, the most obvious footprint is small, and Candela will also introduce relevant summary analysis in future articles.
The above is about the advantages of building photovoltaic power stations in the tropics. Do you understand after reading? Friends who want to know more about the information can learn more about the other PV information we collect.