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 its 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.
词汇:
flip/flip/n. v.用手指轻弹,轻击 tungsten oxide 氧化钨
air conditioner 空调 jolt/dVEult/n. v.震摇,颠簸,晃动
refreshing/ri5freFiN /adj.使人清爽的 electrochromic adj.电致变色的
glaze/leiz/v.装玻璃,用玻璃覆盖 voltage/5vEJltIdV/n.电压
chromogenic adj.发色的 air conditioning 空调,空调系统
注释:
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