问英语作文:太阳能汽车

[太阳能汽车作文] 太阳能汽车 现在的汽车，都是用汽油才能行驶，太阳能汽车作文。大家都知道，使用汽油，不仅会污染环境，并且价钱很昂贵，一点也不划算。我就想发明一种汽车，这种汽车就叫太阳能汽车。 太阳能汽车的外观十分漂亮:车身五颜六色，在阳光的照耀下熠熠生辉，它们从马路上飞驰而过时，就像一道道彩虹，又给繁华的都市增添了一道亮丽的风景线。车顶则呈圆形，因为圆形可以起到缓冲的作用，这样，可以让外界的物体不会轻易砸坏车身，更不会伤到车里的人。 太阳能汽车不仅外形美观，而且构造也十分简单。只需要在汽车上装上两块面积约为5平方分米的太阳能电池板。在太阳能的照耀下，两块电池板中的一块将光能转换为电能，通过一根电线传输到马达上，马达便以每秒400圈的速度高速运行，而且还不污染环境。这时,有的同学就会问了,难道没有太阳的帮助汽车就不能行驶吗？这个问题就交给第二块电池板吧！在晴天里，这块电池板吸收了光能以后，不直接使用，而是保存起来，等到阴天再继续使用，这个问题不就迎刃而解了吗？ 我发明的汽车防盗措施也同样好。如果盗贼撬车门,就将触动车上的感应装置,汽车将发出刺耳的警报,提醒主人：“有情况！”并同时释放出约70伏电压将盗贼电晕。 这就是我设计的汽车，虽然暂时不能成为现实，但是我相信，在不久的未来，在科技发达的未来，我发明的汽车一定会出现在大街小巷。 五〈3〉班 周拓太阳能汽车作文500字

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 driver's team to monitor the car's 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 Earth's 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%.