但也有很多热能被浪费掉了,或者称为“余热”,这些没有被利用的热量都被机器、电力加工过程、甚至是人类活动释放到了环境中,其实都可以被用作热能。
You can make use of this heat, though, by using something called the thermoelectric effect, which lets you convert temperature differences into electric voltage.
你可以通过热电效应利用这种热量,把温差转化成电压。
If two conductors are connected and one side is heated, electrons start to move over to the cooler side, creating a current that flows through the circuit.
连接两个导体,在一端加热,电子开始移向较冷的一侧,电路中就会产生电流。
Some materials act as conductors that can convert that temperature difference into a power source.
一些材料能充当导体,将温差转化成电源。
What this T-shirt does, researchers say, is capture heat coming off of our bodies, which contrasts with the cool air, making electricity.
研究人员说这种T恤的功能就是捕捉在周围空气温度较低时身体散发的热量,用来发电。
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