首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
If Jim Dehlsen ever needs to remind himself why, at 67, he’s still trying to save the world, all he has to do is glance outside
If Jim Dehlsen ever needs to remind himself why, at 67, he’s still trying to save the world, all he has to do is glance outside
admin
2011-06-24
33
问题
If Jim Dehlsen ever needs to remind himself why, at 67, he’s still trying to save the world, all he has to do is glance outside his window. The offices of his three-year-old firm, Clipper Wind-power, look across California’s tranquil Santa Barbara Channel and, in the distance, to the remote marine sanctuary of Santa Cruz island. Marring that view are eight oil rigs jutting into the ocean mist. In 1969 a well underneath one platform ruptured, releasing 200,000 gallons of crude into the harbor, coating beaches and killing thousands of birds. Today the oil rigs represent Dehlsen America’s dependence on fossil fuels. "We’re not only depleting those resources but reaching the limits of what the planet can absorb, in terms of emissions," he says. "And that is clearing the way for the return of wind power."
Not long ago wind power was the domain of fringe scientists and environmentalists. In the 1970s the idea of harvesting the wind’s kinetic energy and converting it into electrons was impractical: the first rickety, garage-built turbines often self-destructed in storms. The industry grew in the 80’s and 90’s, but wind was still too costly, generating power at more than 10 cents per kilowatt hour, versus less than five cents for coal and other fossil fuels. Even today, wind power feeds less than half of 1 percent of America’s ravenous energy appetite, and about 5 percent of Germany’s and Spain’s.
But the industry is maturing and growing quickly—and is beginning to find its place as one viable element in the energy puzzle. Dehlsen is one of its pioneers. His first wind company, Zond— founded in 1980 and sold to Enron in 1997—was synonymous with many early breakthroughs. The firm was the first to add wind energy to the California electricity grid and to bring scientific rigor to the locating of wind farms and the development of wind turbines. In recent years much bigger companies like General Electric, which bought what was left of Zond after Enron imploded, have entered the field. With rapidly improving technology and major corporate muscle behind wind power, costs are falling: wind contracts now average three cents per kilowatt hour (with tax subsidies), cheaper than coal and comparable to natural gas and oil. Because the wind is uncontrolled— it doesn’t always blow—the challenge is to drive costs down further. Still, says Bob Thresher of the Department of Energy’s National Renewable Energy Lab, "wind is the first renewable technology that is very nearly competitive in the market for bulk power generation."
For his part, Dehlsen has returned to the fray with Clipper, which seeks to replay Zond’s original game plan: broker new wind farms around the world and use the revenues to fund advancements in wind technology. Clipper is currently opening farms, such as Iowa’s Flying Cloud, a 44-megawatt wind plant activated in July that will bring in a sizable piece of Clipper’s $11.5 million in revenues this year. Later this year Clipper will unveil its own envelope-pushing turbine design. The C93 Liberty is a 25-megawatt turbine with a rotor span of 305 feet; it features a sophisticated mechanism to distribute the torque from high-speed winds among four on-board electricity generators. That, Dehlsen boasts, will translate into the most efficient turbine in the industry, making wind power even more attractive when compared with new coal and natural-gas power plants. The new turbines are also optimized for use in moderate winds, which would allow wind farms to be located closer to transmission grids than they typically are today. GE and others are working on similar advances, including larger machines for offshore sites.
Politics, as much as innovation, will govern the future. While European governments heavily subsidize wind production, the United States still funnels far greater resources into tax breaks for oil companies, and has even recently allowed the wind-production tax credit to expire. (Dehlsen and others think Congress will eventually renew the wind tax credit.)
But Dehlsen thinks the key is increasing cost efficiency, so that the attraction of wind becomes irresistible. Dehlsen says the cost of wind needs to fall below three cents per kilowatt hour—without tax credits—to truly break society’s addiction to fossil fuels. "It’s still not there, but we’re getting close," he says. He’s trying to build on the $18 million he has already raised from investors, and to expand. He plans to open a wind farm in Oaxaca, Mexico, the largest in Latin America, and in 2006 Clipper will introduce a new turbine with retractable rotors, so that the size of the turbine can be altered to match the speed of the wind. (In low winds, longer blades are more productive.) As for the future of the planet, Dehlsen is less sanguine. He plies a visitor with tracts on dire climate trends and America’s insatiable thirst for fossil fuels. The evidence, he says, is right outside his window.
What is the main idea of the first paragraph?
选项
A、The location of his firm.
B、The disadvantages of fossil fuels.
C、The reason for Jim Dehlsen’s career.
D、America’s dependence on fossil fuels.
答案
C
解析
本段讲的是戴尔森办公室窗外的钻探平台时刻告诉着他自己从事风能研究这项事业的原因。故选项A为正确答案。
转载请注明原文地址:https://jikaoti.com/ti/9hpYFFFM
0
专业英语八级
相关试题推荐
Peopledonotanalyzeeveryproblemtheymeet.Sometimestheytrytorememberasolutionfromthelasttimetheyhadasimilarp
NowadaysthereareanincreasingnumberofadvertisementsonTVandsomeofthemareunfortunatelymisleading.Somepeoplehold
WhenIwasabout11,Iinheritedmyolderbrother’spaperroute.Itwasagoodjob,thoughitmeanswakingupatthecrackof
MoviesarethemostpopularformofentertainmentformillionsofAmericans.Theygotothemovietoescapetheirnormaleveryda
Mr.Bascombwasupset.Attimeslikethishewishedhehadneverbecomeacandidateformayor.Everythinghadgonewronglythat
Oneofthemajorproblemsofnuclearenergyistheinabilityofscientiststodiscoverasafewaytodisposeoftheradioactive
WHO,workingcloselywithitsMemberStates,otherUnitedNationsagenciesandnongovernmentalorganizations,isfocusingonma
DanishpolicehavebeenleftscratchingtheirheadsastheyhuntforthevandalswhodecapitatedtheLittleMermaid.Fewclue
Lastyear’seconomyshouldhavewontheOscarforbestpicture.Growthingrossdomesticproductwas4.1percent;profitssoared
Supernovaearemassiveexplodinggiantstars.Asupernovaisknownasoneofthemostenergeticexplosiveevents.Whentheexpl
随机试题
Listentothefollowingpassage.Altogetherthepassagewillbereadtoyoufourtimes.Duringthefirstreading,whichwillbe
一切唯心主义者都主张()。
A.寻常性间质性肺炎(UIP)B.脱屑性间质性肺炎(DIP)C.非特异性间质性肺炎(NSIP)D.急性间质性肺炎(AIP)E.隐源性机化性肺炎(COP)
A.金黄色葡萄球菌B.厌氧菌C.肺炎克雷伯杆菌D.肺炎链球菌E.肺炎支原体男,66岁。慢性阻塞性肺疾病患者,“上感”后出现高热、咳嗽、脓痰伴痰中带血。胸部X线片示右上肺大片状影,其内可见多个圆形透亮区,叶间隙略下移,最可能感染的病原体是(
连翘用高效液相色谱法测定()
可转换债券的价格通常在理论价值之上,转换价值之上。()
下列情形中,注册会计师认为通常适合采用信息技术控制的有()。
冬至日,小明、小红、小丽、小强各吃了一种食物,分别是饺子、汤圆、面条、米饭。已知:①小明没吃饺子,也没吃米饭;②小红没吃饺子,也没吃面条;③如果小明没吃面条,那么小强也没吃饺子;④小丽既没吃饺子,也没吃米饭。由此可以推出:
曲线()
模式也称为概念模式,它是对数据库全体数据的______的描述。
最新回复
(
0
)