首页
登录
职称英语
Widespread adoption of plug-in electric vehicles could dramatically cut gree
Widespread adoption of plug-in electric vehicles could dramatically cut gree
游客
2024-04-05
3
管理
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." [br] 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://tihaiku.com/zcyy/3541959.html
相关试题推荐
Widespreadadoptionofplug-inelectricvehiclescoulddramaticallycutgree
Widespreadadoptionofplug-inelectricvehiclescoulddramaticallycutgree
Widespreadadoptionofplug-inelectricvehiclescoulddramaticallycutgree
AllChange[A]Thebasicmodeloftheelectricity
AllChange[A]Thebasicmodeloftheelectricity
AllChange[A]Thebasicmodeloftheelectricity
[originaltext]Thisroomisdevotedtoelectricfish.Theeelinthetankbe
[originaltext]Thisroomisdevotedtoelectricfish.Theeelinthetankbe
[originaltext](9)Ourelectriccaristhewayofthefuture.Automobileman
[originaltext](9)Ourelectriccaristhewayofthefuture.Automobileman
随机试题
[audioFiles]2016m8x/audio_ezfj_ezflisteningd_201607_131[/audioFiles]TheOxf
关于行政复议参加人的说法正确的( )。A.被申请人可以委托本机关以外人员参加行政
在美国,每个书面企业价值或无形资产的书面评估报告都包括一个经评估师署名的声明,主
女性,60岁。因消瘦、腹胀、纳差5年入院,病前曾有慢性肝病史。查:皮肤、巩膜黄染
速度v、长度L、运动粘度v的无量纲组合是:
共同时产和共同利益是业主之间建立联系的基础,()是物业管理区域内全体业主建立的共
著名画家、书法家()开创了元代新画风,被称为“元人冠冕”。A.赵孟頫 B
下列关于个人贷款尽职调查的方式和要求的说法中,错误的是()。A.贷款人在不损害
属于选择性COX-2抑制剂的药物是A.安乃近 B.甲芬那酸 C.塞来昔布
易并发脓性胸腔积液、脓气胸的肺炎是A.呼吸道合胞病毒肺炎 B.腺病毒肺炎 C
最新回复
(
0
)