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
Smart Window Windows not only let light in to cut down an electricity use for lighting, but the light coming through the win
Smart Window Windows not only let light in to cut down an electricity use for lighting, but the light coming through the win
admin
2013-09-25
101
问题
Smart Window
Windows not only let light in to cut down an electricity use for lighting, but the light coming through the window also provides heat. However, windows are not something people typically associate with being a cutting edge technology. Researchers are now working on new technologies that enable a window to quickly change from clear to dark and anywhere in between with a flip of a switch.
"It took us a long time to figure out what a window really is, " says Claes Granqvist. He’s a professor of solid-state physics at Uppsala University in Sweden. "It’s contact with the outside world. You have to have visual contact with the surrounding world to feel well. " So, windows and natural light are important for improving the way people feel when they’re stuck indoors.
Yet, windows are the weak link in a building when it comes to energy and temperature control. In the winter, cold air leaks in. When it’s hot and sunny, sunlight streams in. All of this sunlight carries lots of heat and energy. And all of this extra heat forces people to turn on their air conditioners. Producing blasts of cold air, which can feel so refreshing, actually suck up enormous amounts of electricity in buildings around the world.
Windows have been a major focus of energy research for a long time. Over the years, scientists have come up with a variety of strategies for coating, glazing, and layering windows to make them more energy efficient. Smart windows go a step further. They use chromogenic technologies which involve changes of color.
Electrochromic windows use electricity to change color. For example, a sheet of glass coated with thin layers of chemical compound such as tungsten oxide works a bit like a battery. Tungsten oxide is clear when an electric charge is applied and dark when the charge is removed, that is, when the amount of voltage is decreased, the window darkens until it’s completely dark after all electricity is taken away. So applying a voltage determines whether the window looks clear or dark.
One important feature that makes a smart window so smart is that it has a sort of "memory". All it takes is a small jolt of voltage to turn the window from one state to the other. Then, it stays that way. Transitions take anywhere from 10 seconds to a few minutes, depending on the size of the window. The development of smart windows could mean that massive air conditioning systems may no longer need. "In the future, " Granqvist says, "our buildings may look different. "
To make electrochromic windows change color, what is applied to the window glass?
选项
A、Electricity.
B、Tungsten oxide.
C、A battery.
D、A voltage.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/tN1d777K
本试题收录于:
职称英语卫生类C级题库职称英语分类
0
职称英语卫生类C级
职称英语
相关试题推荐
Whilestillinitsearlystages,welfarereformhasalreadybeenjudgedagreatsuccessinmanystates,atleastUNisgettingp
1.Whoknowsbetterthanyourcustomerswhereyouroperationscanbeimproved?Today,progressivefirmsincreasinglyrelyonadv
InBritain,agreementsforinvitingandentertainingguestataweddingareusuallytheresponsibilityofthebride’sfamily.In
Thesingle,decisivefactorthatmadeitpossibleformankindtosettleinpermanentcommunitieswasagriculture.【R1】______Once
Somepeoplebelievethatinternationalsportcreatesgoodwillbetweenthenationsandthatifcountriesplaygamestogetherthey
ItiscommonforAmericanstohavedifferent"circlesoffriends"suchaschurchfriends,workfriends,orsportsfriends.【R1】__
1.Onceitwaspossibletodefinemaleandfemaleroleseasilybythedivisionoflabor.Menworkedoutsidethehomeandearned
Beautyhasalwaysbeenregardedassomethingpraiseworthy.【R1】______Theyhavebettermarriagesandhavemorerespectableoccupat
Beautyhasalwaysbeenregardedassomethingpraiseworthy.【R1】______Theyhavebettermarriagesandhavemorerespectableoccupat
Wewereastonishedtohearthattheirfootballteamhadwonthechampion.
随机试题
直接耦合放大电路存在零点漂移的原因是()。
设且f为可微函数,则全微分dz=________.
男性患者,45岁,因“乏力,左上腹饱胀1个月”入院。查体:轻度贫血貌,皮肤未见瘀点瘀斑,全身浅表淋巴结不大,肝肋下未及,脾肋下8cm,质硬。若患者无疫水接触史,未吃鱼生,无嗜酒史等,病毒性肝炎等指标正常,血常规示:WBC50×109/L,Hb100
患者,女,29岁,已婚。妊娠中期出现腹大异常,胸膈满闷,呼吸急促,神疲肢软,舌淡胖,苔白腻,脉沉滑。应首先考虑的是()
下列事项中,属于《行政处罚法》未作统一明确规定的有()。
某大型运输公司下设陆运事业部和水运事业部,分别从事陆运和水运业务。2014年陆运事业部的车辆资产如下:(1)年初拥有整备质量5吨的货车26辆;整备质量4吨的挂车10辆。(2)因业务扩张需要,2014年2月进口11辆1.6升排气量的高档小
根据物流活动发生的先后次序,企业物流活动可以从水平的方向上划分为生产物流、供应物流、回收与废弃物流和销售物流等4个部分。
48,52,(),74,90,108,127
古人云:“子不教,父之过。”请结合我国民法的监护制度和侵权责任制度加以辨析。
WhenIfirstentereduniversity,myaunt,whoisanEnglishprofessor,gavemeanewEnglishdictionary.Iwas【C1】______toseet
最新回复
(
0
)