The types of the solar road studs
are different, so are the installation positions. However, no matter the shapes of the solar road studs, the following demands for features of the solar road studs should be taken into consideration.
The solar road studs should give out light automatically and delineate the edge of the roads, which is the key feature which is different with the ordinary reflective road studs. The standard for the brightness of the solar road studs of the
Ministry of Transportation is 2000MCD.
The solar panel
The solar panel on the solar road stud can absorb solar energy directly, which can be transformed into electrical energy. The working efficiency of the solar panel decides the quality of the solar road stud directly. Now the monocrystalline silicon solar panel is widely applied, for it has higher photoelectric conversion rate than others, which is about 14%. In addition, the solar panel must be the circuit board with high hardness, if the solar panel is not that hard, it cannot resist the crash of the cars, which may also have influence on the conversion rate of the solar panel.
The conformability of the environment
The environment on roads complicated, and the temperature and the humidity are quite different, so the solar road studs must adapt the change. The temperature in north China is low and that of south China is high, which may influence the working efficiency of the solar road studs. So the conformability of the environment should be taken into consideration in the process of design.
The technical standard for the working temperature of the solar stud is between -20°C to 85°C. In addition, the demand of the humidity of the Ministry of Transportation is that the solar road stud should work effectively after 48 hours under the condition of 45℃ and the 98% relative humidity.