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
Widespread adoption of plug-in electric vehicles could dramatically cut greenhouse gas pollution and reduce U.S. dependence on f
Widespread adoption of plug-in electric vehicles could dramatically cut greenhouse gas pollution and reduce U.S. dependence on f
admin
2016-08-29
59
问题
Widespread adoption of plug-in electric vehicles could dramatically cut greenhouse gas pollution and reduce U.S. dependence on foreign oil. But results of an electric-car pilot project presented recently at the annual meeting of the American Association for the Advancement of Science provide added incentive to go electric: Car owners could return unused electricity back to the grid(输电网)and make real money while doing it.
Electric cars need big, powerful batteries to accelerate to highway speeds and travel scores or even several hundred kilometers on a single charge. But because most drivers drive just a few dozen kilometers a day, most of that battery capacity sits unused. To take advantage of that storage capacity, Willett Kempton, director of the University of Delaware’s Center for Carbon-Free Power Integration in Lewes, teamed up with an electric car maker, several utilities, a software company, and PJM Interconnection, one of 10 regional organizations that coordinate and control the U.S. electrical grid.
To ensure that electricity flows steadily and without interruption, the U.S. government requires PJM Interconnection and its counterparts to have reserves of power in case a generator goes down and other electrical reserves to maintain the 60-Hz frequency of alternating current that our appliances and devices are accustomed to dealing with. Today, PJM Interconnection and its counterparts pay conventional power plants to maintain this reserve power. But as renewable energy sources such as wind and solar, which provide energy cleanly but intermittently, come online, these grid operators need to increase their storage capacity to ensure a steady electricity supply. So Kempton and his colleagues set out to provide some of the backup power from a fleet of parked electric cars.
Kempton’s team used an electric car from AC Propulsions, a California car company, which was custom-built to provide electricity back to the grid. They used commercially available software and hardware that companies such as PJM Interconnection use to monitor and control energy flow. In November, the company hooked the grid up to the car, and Kempton’s team’s electric car became the first car in the world to earn its keep as a backup electric power source. At the rates that PJM Interconnection pays today to maintain power reserves, a hooked-in electric car could generate $1,800 a year for its owner.
"I think it’s tremendously exciting," says Kathryn Clay, director of research for the Alliance of Automobile Manufacturers. "The extra dollars an electric car provides will not be enough by themselves to get consumers to adopt grid-enabled vehicles—for that we also need better and less expensive batteries and tax incentives to give the market an encouragement" Nevertheless, "it’s an incentive to push in the right direction."
What is true about renewable energy sources such as wind and solar?
选项
A、They reduce the dependence on backup power.
B、They increase the necessity for backup power.
C、They are the main sources of backup power.
D、They are regarded as the best back power.
答案
B
解析
原文该句开头的as...表明本句中存在着一对因果关系,原文表明:因为使用了不稳定的可再生能源,导致对后备电力有了更高的需求,因此,本题应选B。
转载请注明原文地址:https://kaotiyun.com/show/LOG7777K
0
大学英语六级
相关试题推荐
A、Rapidpopulationgrowth.B、Corruptcitygovernment.C、Realestatespeculators.D、Lackofimmigrationquotas.B恶劣的生存状态要归因于腐败的城市
A、Sheisn’tgoingtochangehermajor.B、Sheplanstomajorintaxlaw.C、Shestudiesinthesameschoolasherbrother.D、Shei
A、Themanisaforgetfulperson.B、Thetypewriterisnotnew.C、Themancanhavethetypewriterlater.D、Themanmisunderstoodh
A、Informstudentsofthedisadvantagesoffriedfood.B、Findotherstudentswhowillworkinthecafeteria.C、Askstudentstotr
A、19yearsold.B、16yearsold.C、35yearsold.D、25yearsold.C玄奘19岁开始穿越沙漠,16年后回到中国,那时他已经35岁了。
Globalindustrializationhaspouredcarboninthesky,andnowwemustpaytheprice:thenastyclimatechange,withitssinking
MyViewonChina’sCollegeEducation1.近日,北大原校长指出“中国目前没有世界一流的大学”2.分析中国大学教育存在的问题3.我的看法
中国申奥意向的形成可追溯到1908年,当时的《天津青年》杂志就曾提出中国何时才会参加奥运会,中国何时才能主办奥运会。1979年,邓小平同志指出,在适当的时机,中国会申办奥运会。1991年至2001年,北京共筹备了两次申奥工作,第一次申奥仅以两票之差败于悉尼
徐霞客是明朝著名的地理学家(geographer)、旅行家和探险家。他一生周游考察了16个省,足迹几乎遍及全国。他在考察的过程中,从来不盲目迷信书本上的结论。相反,他发现前人研究地理的记载有许多不很可靠的地方。为了进行真实细致的考察,他几乎全靠双脚旅行。为
WhatisAprilFoolsDayandwhatareitsorigins?Itis【B1】______believedthatinmedievalFrance,NewYearwascelebratedon1
随机试题
随机变量X的方差D(X)存在,C为非零常数,则一定有【】
A.由雌激素、糖皮质激素、卤素等所致B.接触石油、焦油等C.痤疮,突然显著加重,伴有发热等全身症状D.表现为严重的结节、囊肿、窦道、瘢痕E.与月经密切相关月经前痤疮的临床特点是
A.猪瘟病毒B.猪细小病毒C.伪狂犬病病毒D.日本脑炎病毒E.猪繁殖与呼吸综合征病毒某猪场一头公猪出现睾丸一侧肿大,另一侧萎缩,与该公猪交配的母猪出现流产。用乳鼠肾细胞分离到一种能凝集绵羊红细胞的病毒,该病例最可能的致病病原是
男,5岁,咳嗽4个月,凌晨及活动后加剧,服用多种抗生素无效,服用特布他林(博利康)尼后有缓解。查体:无发热,面及颈部散在湿疹。两肺呼吸音粗,该病儿最可能的诊断是
关于居住区道路用地的叙述正确的是()。
铁路路堤填筑应按三阶段、四区段、八流程的工艺组织施工。下列选项中,属于“八流程”内容的有()。
合规人员在对业务部门进行核查时,应当坚持统一标准来对违规行为风险进行评估和报告,这体现了合规管理的()原则。
我校将针对中学生使用手机对其学习成绩是否有影响开展调查活动。作为此次调查的负责人,你会如何组织这次活动以保证调查数据的客观真实?
How’sthisforacynicalviewofscience?(46)"Anewscientifictruthdoesnottriumphbyconvincingitsopponentsandmakingth
优越的战略位置、通讯条件(communications)和商业文化,促进了香港经济和社会迅速发展。
最新回复
(
0
)