离子液体基集热纳米流体的光热转化性能调控和传热特性

项目名称： 离子液体基集热纳米流体的光热转化性能调控和传热特性

项目编号： No.21276088

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 化学工业

项目作者： 方晓明

作者单位： 华南理工大学

项目金额： 80万元

中文摘要： 太阳能集热器的效率对包括太阳能热发电在内的太阳能热利用系统至关重要。本项目致力于为适应太阳能中、高温热利用的新型直接吸收太阳能集热器来设计和研制太阳辐射吸收率高、工作温程宽、耐高温热分解性好以及热导率高的新型集热介质。以离子液体为基础流体，加入包括石墨烯在内的几种纳米添加剂来研制高性能集热纳米流体。探索相关纳米材料在离子液体中的分散特性和稳定性,在整个液体温程内测定离子液体基集热纳米流体的导热系数、比热容、粘度、吸光光谱和消光系数等的物性数据，测定离子液体基集热纳米流体的光热转化性能，揭示纳米材料种类、微观结构、尺寸、形状以及添加体积分率等参数对离子液体基集热纳米流体特性和光热转化性能的影响规律,掌握系统调控离子液体集热纳米流体性能的手段，研究所得的高性能离子液体集热纳米流体的传热性能。本项目的研究将提供新型的高性能集热纳米流体，推进直接吸收太阳能集热器乃至太阳能热发电的发展。

中文关键词： 太阳能；直接吸收式集热器；纳米流体；相变材料；碳纳米材料

英文摘要： The efficiencies of solar thermal collectors are critical for solar energy utilization systems including the soalr thermal power plants. This project aims at designing and developing novel heat-transfer liquids with high solar absorption, wide liquid temperature range, good thermal stablility, and high thermal conductivity for the direct absorption solar collectors suitable for the solar energy medium and high temperature utilization. The nanofluids based on the ionic liquids with good thermal stability will be systematically studied, in which several nanomateials including graphene are chosen as the additives. The stability of the nanomaterials dispersed in the ionic liquids will be firstly investigated. Secondly,the thermal conductivities, specific heat capacities, viscosities, optical absorption spectra, and extinction coefficients of the obtained nanofluids will be measured at the whole liquid temperature range.Thirdly, the solar thermal conversion performances of the nanofluids will be evaluated. Based on the obtained data, the effects of the microstructures, sizes, morphologies, and volume fraction of the nanomaterials on the properties and the solar thermal conversion performances of the obtained nanofluids will be elucidated, and the properties of the nanofluids can be tuned and optimized. Finally, the h

英文关键词： Solar energy；direct absorption solar collectors；nanofluid；phase change material；carbon nanomaterial