First, the installation and arrangement of solar street lights:
The installation and arrangement of solar street lamps need to be installed and lighted according to the width of the road and the lighting requirements. Generally, there are three ways: one-side cloth light, double-sided symmetrical cloth light, and double-sided staggered cloth light.
Second, the choice of solar street light source:
The selection principle of the solar street light source is a light source suitable for environmental requirements, high luminous efficiency and long life. Commonly used light source types are: three primary color energy-saving lamps, traditional nano lamps, induction lamps, LEDs, etc. For the global environmental status, the most widely used solar street light source is the induction lamp light source and LED light source.
Third, the choice of lamps:
The choice of luminaires mainly depends on the reflectivity, illuminance and maintenance factor. The quality of road lighting can be measured by the three indicators of road surface brightness, uniformity and glare. Road lighting quality is reflected in:
1, brightness level
The average brightness of the road has different brightness requirements according to the road grade. Generally, the expressway and the main road require a brightness requirement of 2 cd/m2 or more, and the secondary trunk road and the auxiliary road or the residential road are relatively low.
2, the average illumination
The average illuminance refers to the average value of all illuminances on the road surface and is the unit of illumination intensity, which is generally expressed by LM.
3, glare
Road lighting should strive to limit the uncomfortable glare within a certain range, generally expressed by G value, in general, G = 7.
Fourth, system configuration calculation:
The formula for calculating the peak sunshine hours is that the peak sunshine hours = A / (3.6X365)
Fifth, the determination of the series voltage:
The DC input voltage of the solar street light source is used as the system voltage, generally 12V or 24V. When the solar module voltage is 36V, the battery voltage requirement is not less than 2/3 of the component voltage, so the voltage of the battery, controller and light source must be selected. 24V.
Sixth, the choice of controller:
The controller is generally made of stainless steel, which is beautiful and durable. The charge and discharge controller is designed with light control, time control, over charge and over discharge protection and can realize secondary energy saving control. Half power illumination in the specified time period. . The battery can be equipped with a “maintenance-free lead-acid battery”. Most of the charge and discharge controllers are built into the control box.
Seven, solar panel capacity calculation:
For solar street lights, the overall system configuration formula: P = light source power X light source working time / peak sunshine hours; where P is the power of the battery component, the unit is W; the light source working time unit is H, the peak sunshine hours unit is H;
Eight, battery capacity calculation:
It is preferred to determine the storage type of battery type and battery according to the local rainy weather conditions. There are more rainy weather in the south, and the storage weather is generally 5-7 rainy days.
Battery capacity calculation formula: battery capacity = load power X day working time X storage days ÷ discharge depth ÷ system voltage
Among them: the battery capacity unit is AH; the load power unit is W; the daily working time unit is H; the storage day unit is D; the discharge depth is generally about 0.8, and the system voltage unit is V.
Nine, light pole design:
The common light pole design of solar street light is steel cone light pole, which is beautiful, sturdy and durable, with simple processing technology and high mechanical strength, which is convenient for various shapes. Commonly used words of the light pole section, round, hexagonal, octagonal, etc., taper 1:90, 1:100, the wall thickness according to the force of the pole, generally 3-5mm
Ten, dip design:
In order for solar streetlight modules to maximize solar radiant energy throughout the year, we must choose the best tilt angle for the solar modules.
XI. Wind resistance: In the series of solar street lamps, a problem that needs to be paid attention to in structural design is the design of wind resistance. The design of wind resistance is mainly divided into two parts: the wind resistance of the battery assembly bracket and the wind resistance of the pole. .
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