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
Better Solar Energy Systems: More Heat, More Light Solar photovoltaic thermal energy systems, or PVTs, generate both heat an
Better Solar Energy Systems: More Heat, More Light Solar photovoltaic thermal energy systems, or PVTs, generate both heat an
admin
2014-01-28
83
问题
Better Solar Energy Systems: More Heat, More Light
Solar photovoltaic thermal energy systems, or PVTs, generate both heat and electricity, but【C1】______now they haven’t been very good at the heat-generating part compared to a stand-alone solar thermal collector. That’s because they operate at low temperatures to cool crystalline silicon solar cells,【C2】______lets the silicon generate more electricity but isn’t a very efficient way to gather heat.
That’s a problem of economics. Good solar hot-water systems can harvest much more energy than a solar-electric system at a substantially lower【C3】______. And it’s also a space problem: photovoltaic cells can【C4】______up all the space on the roof, leaving little room for thermal applications.
In a pair of studies, Joshua Pearce, an associate professor of materials science and engineering, has devised a【C5】______in the form of a better PVT made with a different kind of silicon.
Most solar panels are made with crystalline silicon, but you can also make solar cells out of amorphous silicon, commonly known【C6】______thin-film silicon. They don’t create as much electricity, but they are lighter, flexible, and cheaper. And, because they【C7】______much less silicon, they have a greener footprint.【C8】______, thin-film silicon solar cells are vulnerable to some bad-news physics in the form of the Staebler-Wronski effect.
"That means that their efficiency drops when you【C9】______them to light—pretty much the worst possible effect for a solar cell," Pearce explains, which is one of the【C10】______thin-film solar panels make up only a small fraction of the market.
However, Pearce and his team found a【C11】______to engineer around the Staebler-Wronski effect by incorporating thin-film silicon in a new【C12】______of PVT. You don’t have to cool down thin-film silicon to make it work. In fact, Pearce’s group discovered that by heating it to solar-thermal operating temperatures, near the boiling【C13】______of water, they could make thicker cells that largely【C14】______the Staebler-Wronski effect. When they applied the thin-film silicon directly to a solar thermal energy collector, they also found that by baking the cell once a day, they【C15】______the solar cell’s electrical efficiency by over 10 percent.
【C15】
选项
A、defined
B、wasted
C、lowered
D、boosted
答案
D
解析
句意为:如果一天把太阳能电池加热一次,那么太阳能的电力效能会——10%。四个选项:defined“使明确;给…下定义”;wasted“浪费”;lowered“降低;削弱”;boosted“提高,推进”。
转载请注明原文地址:https://www.kaotiyun.com/show/6sGd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
AIntroductiontoSingaporeBEducationCEconomyDStateSystemofSingaporeEHistoryofSingaporeFLandandClimate
CarsAreGoodfortheEnvironmentBritain’smotorindustryisplanningamajorpublicitycampaigntocounterwhatitseesasan
AFactorsLeadingtoEnergyWasteBHomeAppliancesCPropsalstoCutEnergyConsumptionDEnergyConsumptionTestETerawa
ValuingChildhoodThevalueofchildhoodiseasilyblurred(变得模糊不清)intoday’sworld.Considersomerecentdevelopments:Thechi
ManandComputerWhatmakespeopledifferentfromcomputerprograms?Whatisthemissingelementthatourtheoriesdon’tyet(51)
ManandComputerWhatmakespeopledifferentfromcomputerprograms?Whatisthemissingelementthatourtheoriesdon’tyet(51)
Insectsthriveallover,fromthehottestdesertstothesnow-cladpeaksofloftymountains.
FoodandHealthThefoodyoueatdoesmorethanprovideenergy.Itcanhaveadramaticeffectonyourbody’sabilitytofig
FoodandHealthThefoodyoueatdoesmorethanprovideenergy.Itcanhaveadramaticeffectonyourbody’sabilitytofig
NewProductWillSaveLivesDrinkingwaterthatlookscleanmaystillcontainbugs(虫子),whichcancauseillness.Asmallcom
随机试题
在设计时无需计算联系焊缝的强度,而工作焊缝的强度则必须计算。
连续X线的最短波长的叙述,正确的是
A.橄榄B.赤参C.潼蒺藜D.千张纸E.恶实牛蒡子的别名是()。
关于建筑施工企业的安全生产教育培训制度,表述正确的是()。
如果某种商品供给曲线的斜率为正,在保持其余因素不变的条件下,该商品价格上升,将导致()。[2006年真题]
基金托管人一般由()聘请。
下列执照和单证中,属于“五证合一、一照一码”登记制度改革范围的有()。
提高军队的科学技术含量,加强军队的科学技术含量,加强以信息化为主要标志的军队质量建设,成为世界军事发展的趋势。()
气象条件及其变化不仅影响人的生理健康,对心理情绪的影响也非常明显。有利的气象条件使人情绪高涨、心情舒畅;不利的气象条件使人情绪低落、懒惰无力,甚至导致心理及精神病态和行为异常。研究表明,高温、高湿、阴雨以及一些异常天气事件,都不利于人的心理健康。世卫组织的
设U~N(μ,1),V~χ2(n),且U,V相互独立,则服从___________分布.
最新回复
(
0
)