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Home> News>Industry Information>Product Information>The optimum Angle of pv array is not necessarily the best!

The optimum Angle of pv array is not necessarily the best!

From:galvanized steel solar from China     Release time:2018-11-05

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In the design of the photovoltaic phalanx, if fixed installation, there will be a "best Angle" concept, in this case, the best Angle is placed when photovoltaic phalanx, according to a certain inclined Angle, reached the maximum annual total radiation on the surface of the photovoltaic panels tilt, but usually, close to the best Angle of the Angle of radiation difference is very small. When the capacity of the power station is certain, reducing the inclination Angle can save the land and cable, and increase the wind resistance of the supports. In the case of a certain land area, reducing the tilt Angle can increase the installed capacity and power generation and increase the revenue. The following is a case study of a distributed power station in gansu province.

structure of the solar system from China

When the Angle is 35 ° by software calculation annual total radiation on the surface of the slope is the largest. 23 ° ~ 37 ° inclined plane year change total amount below.

Can be seen from the above, 23 ° ~ 37 ° inclined plane from the total amount change curve is very smooth, that is the best Angle near total radiation on the surface of the slope in vary little.

The project land area available is limited, in this case, with 35 °, 30 °, 25 ° Angle of three power station of installed capacity, power generation, investment income, the results are as follows:

structure of the solar system from China

Figure 2: the installed capacity, power generation and revenue of the power station from different angles

When photovoltaic modules tilt Angle of 35 °, installed capacity of 4.0 MW power station, the average annual output of 5.34 million kW, internal rate of return of 12.64% before finance and tax; When the tilt Angle of 30 °, installed capacity of 4.4 MW power station, the average annual output of 5.86 million kW, the internal rate of return of 12.72% before finance and tax; When the tilt Angle is 25 °, installed capacity of 5.5 MW power station, the average annual output of 5.86 million kW, internal rate of return of 12.83% before finance and tax.

This shows, compared with the best Angle of 35 °, 25 ° benefits better. Therefore, the best is just to say that the radiation quantity is the maximum, which may not be the best for the overall benefit of the power station. Different projects should compare multiple schemes according to the project situation, and finally determine the installation Angle of pv array.


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