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
2017-06-29
104
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."
In the research on the custom-built car, the commercially available software and hardware _______.
选项
A、enabled the car to control its energy flow
B、enabled the grip operators to monitor the car’s energy flow
C、were provided by PJM Interconnection for Kempton’s team
D、were custom-designed for Kempton’s team
答案
A
解析
该段第2句开头的主语They指的是上一句提到的Kempton’s team,该句提到了他们使用了商业软件和硬件,结合上一句的custom-built和本句的这些软件和硬件的功能可以推断Kempton’s team将这些软件和硬件安装到电动车里,以使电动车能控制电池电力的流动方向,以达到为电网供电的目的,因此选A。
转载请注明原文地址:https://kaotiyun.com/show/NyU7777K
0
大学英语六级
相关试题推荐
Itiscommonlyheldthatdrinkingmoderateamountsofalcoholcanreducetheoddsofhavingadeadlyheartattack.More【B1】_____
Itiscommonlyheldthatdrinkingmoderateamountsofalcoholcanreducetheoddsofhavingadeadlyheartattack.More【B1】_____
Mostpeopleareawarethatoutdoorairpollutioncandamagetheirhealth,butmanydonotknowthatindoorairpollutionalsoca
Mostpeopleareawarethatoutdoorairpollutioncandamagetheirhealth,butmanydonotknowthatindoorairpollutionalsoca
Mostpeopleareawarethatoutdoorairpollutioncandamagetheirhealth,butmanydonotknowthatindoorairpollutionalsoca
Mostpeopleareawarethatoutdoorairpollutioncandamagetheirhealth,butmanydonotknowthatindoorairpollutionalsoca
Haveyoueverwantedtotravelbackthroughtimeandseewhatlifewaslikeatthedawnofman?Well,museumscanmakehistory【B
Haveyoueverwantedtotravelbackthroughtimeandseewhatlifewaslikeatthedawnofman?Well,museumscanmakehistory【B
Haveyoueverwantedtotravelbackthroughtimeandseewhatlifewaslikeatthedawnofman?Well,museumscanmakehistory【B
ItisnoteasytotalkabouttheroleofthemassmediainthisoverwhelminglysignificantphaseinEuropeanhistory.Historyan
随机试题
女性,22岁,月经前反复出现双侧额颞部搏动样疼痛,发作时伴有恶心、呕吐、畏光、畏声、头皮触痛。严重影响其工作、学习。治疗护理措施不恰当的是
A.丙酮酸B.草酰乙酸C.乙酰辅酶AD.葡萄糖-l-磷酸E.磷酸二羟丙酮
A.氯氮平B.苯巴比妥C.阿米替林D.苯妥英钠E.卡马西平属于乙内酰脲类的是()。
监理工程师认真审查施工单位的分包人的资格和分包工程的类型、数量后,施工单位可以执行分包合同。()
建设项目投资的计价特点有()。
甲公司目前主营产品为A,A产品所在行业竞争者众多,占有市场份额最高的企业的市场份额为18%,且行业内主要企业的份额比率均在1.7以内。甲公司同两个主要竞争对手乙公司和丙公司的竞争态势矩阵,见表6。为了进一步拓展业务范围,甲公司考虑进入B产品市场,为此委
对硫酸、磷酸、亚硫酸、铬酸和氢氟酸等具有良好耐蚀性的有色金属为()。
IEEE802.5令牌环(TokenRing)网中,时延是由(1)决定。要保证环网的正常运行,环的时延必须有一个最低限度,即(2)。如果达不到这个要求,可以采用的一种办法是通过增加电缆长度,人为地增加时延来解决。设有某一个令牌环网长度为400m
(3)在考生文件夹下WIN文件夹中新建一个文件夹BOOK。
Ifyou’reemployedinthefieldofbusiness,thereissomethingyouhavelikelyexperiencedbefore:thefeelingofhelplessness
最新回复
(
0
)