Task 4

Solar car

Solar car is a car that driven by solar energy. Compared with the traditional engine driven cars, solar car is a real zero emissions.

summarize:

 Solar power application in automobile, will be able to effectively reduce the environmental pollution around the world, creating a clean living environment, as the global economy and the rapid development of science and technology, solar car as an industry is not a myth. Burning gasoline cars is an important pollution source in the city, and car exhaust emissions including sulfur dioxide and nitrogen oxides will cause air pollution, affect our health.

 Solar car use solar cells convert light energy to electrical energy, electric energy will be saved in storage battery backup, are used to push the car's motor. Due to the solar car without burning fossil fuels, so will not emit harmful. It is estimated that if the cars by solar energy instead of burning cars, and can reduce carbon dioxide emissions of every car 43 to 54%.

significance

Automotive fuels such as petrol and diesel, they are derived from oil. But this kind of fossil fuels, oil is not renewable, with only a little a bit less, there is always a day out. According to scientists predicted that the world's proven oil reserves will be necessary in around 2020. As a result, cars will appear in the risk of "hunger", human beings will be faced with the challenge of energy.

On the other hand, the oil itself is a kind of valuable chemical raw materials, can be used to make plastics, synthetic rubber and synthetic fibre, etc. The oil as fuel is burned, not only great pity, but also pollutes the environment to the survival of humans.

operating principle；working principle

sun, its surface is churning in the flames of a fire, the temperature is around 6000 k. Inside the sun, the temperature is as high as twenty million degrees of above. So solar energy moment kept a lot of light and heat, bring human light and warm, it also became a cornucopia inexhaustible, inexhaustible energy.

Turning sunlight into electricity is an important way of utilizing solar energy. Solar cells based on semiconductor materials used are different, usually divided into silicon, cadmium sulfide, gaas, etc., is one of the most commonly used silicon solar cells.

Silicon solar cells with circular and rectangular, semicircle, etc. The battery on a small silicon chip with paper-thin. On one side of the silicon wafer evenly mixed in some boron, phosphorus mixed with some of the other side, and on both sides of the silicon wafer with electrode, it can turn light energy into electrical energy.