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Currently, a mobile solar-powered traffic light has begun to “stand guard” at intersections in many cities. This type of traffic light is energy-saving and flexible, which can greatly reduce the work pressure of the traffic police. The main technical parameters of this solar traffic light are presented in the table below. During the day, solar panels power the traffic lights, while excess energy recharges the battery. On rainy days and at night, the battery powers the traffic lights so that they can work continuously, as shown in the figure.
Photoelectric conversion efficiency η Effective light receiving area S Operating voltage U Specifications of each light signal U, P Conditions of use T
30% 8 24V 24V, 30W -30℃～70 ℃
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⑴ This traffic light Solar is equipped with 4 wheels at the bottom and can be easily moved to areas requiring temporary traffic diversion or power outage. The function of these four wheels is to reduce friction in a __________________ method.
⑵ On a sunny day, when the traffic light is not working and the battery is charging, the energy conversion process of the solar traffic light is _____ the energy is converted into ________ energy then into ________ energy.
⑶ Assuming that the effective light reception time per day is 6 hours and the solar radiation power P0 = 103 W per square meter, how many kWh of electric energy does this panel of solar traffic light gets in a day?
< p>⑷ This type of signal lightlation solar is divided into four groups: front, rear, left and right. Each group is made up of red, yellow and green lights, with a total of 12 traffic lights. How many days can the solar traffic light panel get enough electricity in one day to work normally? When operating normally, what is the main circuit current?Answer
⑴Rolling instead of sliding
⑵Solar electric energy and chemical energy
⑶The total power P of the solar panel receiving the radiation solar =8P0=8×103W=8kW
The total solar energy W obtained by the solar panel in one day=P total t=8kW×6h=48kWh
The energy electric converted from solar energy in one day W=W Total ?η=48kwh×30%=14.4kWh
⑷The total power of the solar traffic light in normal operation P=4P1=4×30W =120W=0.12kW< /p>
The solar traffic light operates normally permanentlynce. Working time t=W/P=14.4kWh/0.12kW=5 days
When the solar traffic light works normally, the dry circuit current I =P/U=120W/24V= 5A
Car Can I install a small LED solar rear collision warning light?
No. The solar panelsthemselves are resistant to high temperaturesSilicon crystal material.
The solar panel itself is made of high temperature resistant crystalline silicon material and can generally withstand temperatures close to 200 degrees. Although silicon crystal solar panels are prone to reduced power generation efficiency due to overheating, they are unlikely to catch fire simply from sunlight. It is more likely that the power generation system under the panel is shorted or has an abnormally high temperature. a fire.
Precautions regardingSolar warning lights: 1. Avoid dark and humid places to extend battery life.
2. Place the lamp in a location with enough sunlight to store energy. It's best to charge it once every 3 months when not in use to avoid battery damage.
It is possible to install small solar LED rear anti-collision lights. According to relevant information, the solar warning light is a traffic light that uses solar energy as energy. This type of outdoor lighting does not require external power or wiring. It is simple and convenient to install. is widely used in road administration, fire protection, transportation and other fields. The main functions of solar warning lights are:
1. During highway maintenance operations, they must be placed in a suitable location to rapurge drivers to drive carefully.
2. Install in dangerous areas of the highway where there are potential traffic safety hazards to remind drivers and pedestrians to pay attention to safety and avoid traffic accidents.
3. Installation in some dangerous road sections, such as highway intersections, bends, bridges, roadside village intersections, school gates, residential areas, factory gates, etc. ., can serve as a warning.
4. At night, the solar light is attached to the building. When the switch is turned on, energy stored during the day can be used to turn on the light, serving as a warning to the building. .
5. A warning light can also be placed on the rear or rear window of the car to prevent rear-end collisions when the car breaks down.
6. FunctionThe main purpose of solar warning lights is to be installed in various occasions that require warning, and to remind others through the flashing of the light source, special attention should be paid to the fact that red, blue, orange or ** cannot be used.