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SSS 2008-03-28

时间:2010-05-13 05:55来源:互联网 提供网友:0922013129   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I’m Cynthia Graber. This will just take a minute.

One of the problems with large-scale solar power plants is that they require a huge amount of space. To rise above that problem Israeli researchers recently patented a system of solar collecting balloons. The helium-filled globes will be covered with thin-film flexible photovoltaic panels to capture sun’s rays. Designs have been proposed before that include floating or flying solar arrays. But this is a modular system tethered to the ground through a system of cables. Some cables will deliver helium to the balloons, others will carry the solar energy back to earth. The researchers are testing the arrays on a few sites in Israel. A benefit of this system is that the arrays won’t cover a huge parcel of land and the system can be easily expanded. Need more power? Hook up another balloon. Of course there are still challenges, such as reducing the weight of the balloons, dealing1 with wind and designing the optimal2 system for transporting the energy down to the surface. But developers say that thin-film solar energy advances every month and they hope their breakthroughs will make solar balloons realistic and economically viable3 in the not too distant future.

 

Thanks for the minute for Scientific American's 60-Second Science. I’m Cynthia Graber.

 


点击收听单词发音收听单词发音  

1 dealing NvjzWP     
n.经商方法,待人态度
参考例句:
  • This store has an excellent reputation for fair dealing.该商店因买卖公道而享有极高的声誉。
  • His fair dealing earned our confidence.他的诚实的行为获得我们的信任。
2 optimal zmDzhM     
adj.最适宜的;最理想的;最令人满意的
参考例句:
  • What is the optimal mix of private and public property rights in natural resources?私人和国家的自然资源产权的最适宜的组合是什么?
  • Optimal path planning is a key link for the sailing contest.帆船最优行驶路径规划是帆船比赛取胜的关键环节。
3 viable mi2wZ     
adj.可行的,切实可行的,能活下去的
参考例句:
  • The scheme is economically viable.这个计划从经济效益来看是可行的。
  • The economy of the country is not viable.这个国家经济是难以维持的。
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TAG标签:   SSS  photovoltaic
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