First of all, each solar street lamp is a relatively independent system, and there is no need to bury cables or dig roads during installation and construction, which saves a considerable amount of manpower, material resources and installation costs. In addition, electricity consumption, an ordinary street light for about 6 hours a day, the consumption of electricity is about 2 degrees, a year needs more than 300 electricity costs, a city according to 300 street lights calculation, a year cost nearly 100,000 yuan, the use of solar street lights on the whole province.
It is reported that there are 50 million new outdoor lights in the country every year. If the solar energy can account for one tenth of one percent, it will save the country hundreds of millions of kilowatt hours of electricity every year, which is equivalent to sending a 100,000-kilowatt power station to the country.
Ii. Principle of energy conservation
1. How to store energy of solar panels?
The main material for solar panels is silicon, but there are also some other alloys. When a solar panel is exposed to light, it converts light energy into electricity, causing current to flow from one side to the other. Solar panels are designed on this principle. Solar panels can generally generate electricity as long as they are exposed to sunlight or light. In order to minimize the light reflection of solar panels and improve the photoelectric conversion rate, it is generally covered with a film to prevent light reflection, making the surface of solar panels purple. In addition, the inclination of solar panels will have a considerable impact on whether the solar street lighting can be effective.
2. How does light energy become electricity?
The solar street lamp mainly consists of four parts: photovoltaic module, light-emitting diode, solar cell and controller. Photovoltaic modules absorb light during the day, convert solar energy into electricity and store it in solar cells, then discharge the light when it gets dark at night. In normal sunny days, under the ideal light intensity, it only needs 4 hours to be fully charged. After each charge is completed, it can be guaranteed for more than 5 days at most, and it can work normally even if it rains for 3 consecutive days.
In addition, according to different requirements, the controller can design the switch of the solar street lamp as light control or time control, not only the charging and discharging time of the battery can be controlled, but also the discharge intensity can be controlled.
In a word, in the cities with more and more energy consumption, urban electricity consumption has become extremely heavy: industrial electricity consumption and household electricity consumption have been high in recent years, rising year by year, and many cities' electricity consumption peak is more common. If solar street lamps can be widely used, people will not have to worry about the impact of normal production and life.