关于太阳能的英语作文.docxVIP

关于太阳能的英语作文 The Solar Energy is the Origin of the lifes on the earth. Plants synthesize the tissue materials and grow with the solar energy; the earth warms up with the everyday solar irradiationwhich makes the earth suitable for living; scientists have developed solor cellswhich can directly transform solar energy into electric energy. Actuallysolar irradiation also makes the air flowwhich gives the wind; solar irradiation vaporizes the waterwhich makes the rain; solar irradiation even help people to produce Vitamin D under the skinwhich guarantee our bones healthy. Solar cars combine technology typically used in the aerospace bicycle alternative energy and automotive industries. The design of a solar vehicle is severely limited by the amount of energy input into the car. Most solar cars have been built for the purpose of solar car races. Exceptions include solar-powered cars and utility vehicles. Solar cars are often fitted with gauges as seen in conventional cars. In order to keep the car running smoothly the driver must keep an eye on these gauges to spot possible problems. Cars without gauges almost always feature wireless telemetry which allows the drivers team to monitor the cars energy consumption solar energy capture and other parameters and free the driver to concentrate on driving. Solar cars depend on PV cells to convert sunlight into electricity. In fact 51% of sunlight actually enters the Earths atmosphere. Unlike solar thermal energy which converts solar energy to heat for either household purposes industrial purposes or to be converted to electricity PV cells directly convert sunlight into electricity. When sunlight photons strike PV cells they excite electrons and allow them to flow creating an electrical current. PV cells are made of semiconductor materials such as silicon and alloys of indium gallium and nitrogen. Silicon is the most common material used and has an efficiency rate of 15-20%.