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文章来源:本站   发布时间:2010/4/8   浏览次数:3940


英译汉
      The U.S. military is developing technology to extend the life of its spy satellites. But instead of creating a complex chemical propellant, the Pentagon has turned to one of the simplest compounds on Earth-water.
     

      The Defense Advanced Research Projects Agency is working with Proton Energy Systems(质子能量系统公司) on the Water Rocket program, which would develop a satellite that exploits a "closed loop" regenerative fuel cell: Solar power electrolyzes(电解) water into hydrogen, then the hydrogen is converted into electricity and water. Satellites that generate their own power could remain in service for up to 20 years, as long as they don''t become technologically obsolete. The solar panel and fuel cell in development provides 1 kilowatt of electricity, which is sufficient to power the thrusters for maintaining orbits or for short journeys. Prolonging the life of satellites could reduce the amount of wayward "space junk."


 
 
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