Carbon Nano Fiber Reinforced Cement Composite for Energy Harvesting Road
Carbon Nano Fiber Reinforced Cement Composite for Energy Harvesting Road
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DOI：
10.1061/41148(389)22
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
S. Bhattacharjee;A. Batra;J. Cain
中科院分区：
文献类型：
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作者：
S. Bhattacharjee;A. Batra;J. Cain
能量收集（也称为功率收集或能量收集）技术允许捕获未使用的环境能量，例如太阳能、风能、热能、应变能和动能、气体和液体流的能量，并将能量转换为另一种形式的可用能量。可从路面获得的环境能量的一种形式是源自路面的自然加热的热能。本研究的目的是确定是否有可能从路面捕获热能并储存能量，并将其用作其他设备的替代电源。在本文中，智能材料的基础上，定期可用波特兰水泥已经开发出来，可以捕获环境热能可从路面。水泥复合材料充当热电材料。热电材料的特性是温度的变化在材料中产生电流。在实验室中制备了含和不含碳纳米纤维的波特兰水泥试样，并测试了各种性能，如热释电系数和介电常数。已经发现，普通波特兰水泥充当热电材料。纳米碳纤维的加入提高了水泥的热释电性能。介电常数和热释电系数均随温度的升高而增大。目前的研究表明，简单的材料，如波特兰水泥可以用来捕获热能从路面，这可以存储在电容器的电源使用的其他传感器电子。
Energy harvesting (also known as power harvesting or energy scavenging) technology allows capturing unused ambient energy such as solar, wind, thermal, strain and kinetic, energy of gas and liquid flows and converting the energy into another form of usable energy. One form of ambient energy available from pavements is thermal energy derived from natural heating of pavements. The goal of this study was to determine if there is a possibility of capturing thermal energy from pavements and storing the energy and using it as alternative power source to other devices. In this paper, a smart material based on regular available Portland cement has been developed which can capture ambient thermal energy available from pavements. The cement composite material acts as a pyroelectric material. The characteristic of pyroelectric material is that a change in temperature creates current flows in the material. Specimens of Portland cement with and without carbon nanofibers have been prepared in the laboratory and tested for various properties, such as, pyroelectric coefficient and dielectric constant. It has been found that plain Portland cement acts as pyroelectric material. Addition of carbon nanofibers increases the pyroelectric behavior of cement. Both dielectric constant and pyroelectric coefficient increase with increase in temperature. The present research indicates that simple material such as Portland cement can be used to capture heat energy from pavements, which can be stored in capacitor for the use of power source to other sensor electronics.