高温显热-潜热复合堆积床储热系统液-固耦合储热特性研究

项目名称： 高温显热-潜热复合堆积床储热系统液-固耦合储热特性研究

项目编号： No.51306170

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 能源与动力工程

项目作者： 王艳

作者单位： 中国科学院电工研究所

项目金额： 25万元

中文摘要： 利用显热材料的高导热率，潜热材料的高储热密度，组成显热-潜热复合储热单元，达到有效提高储热系统的储热效率，成为储热研究领域的热点问题。本项目旨在对以高温（200℃～600℃）气体作为传热介质，多孔陶瓷基与无机盐相变材料复合的显热-潜热堆积床储热系统内气体对流，固体导热、相变传热以及高温辐射的多相耦合传输机理开展深入系统的研究。结合理论分析与实验测试，建立高温显热-潜热复合储热的三维动态数学模型，研究复合储热单元内液固界面移动、界面热阻与固-液耦合传热机理，揭示高温显热-潜热复合堆积床储热系统动态储热特性，为这一技术在高温储热领域的实际应用奠定基础。

中文关键词： 高温固体储热；显热-潜热储热；储热特性；液固耦合；储热系统优化

英文摘要： To use the composite sensible/latent heat materials for the purpose of improving the heat storage efficient in thermal storage system has become of a very hot topic of research, due to its advantage in high thermal conductivity coefficient of sensible material and high storage density of latent material. This project aims to study the multiphase coupled transmission mechanism of gas convection, solid conduction, phase heat transfer and high temperature radiation in sensible/ latent heat composite bed-packed thermal storage system. The thermal storage unit is composited of porous ceramic as the sensible material and inorganic salt as the latent material, and high temperature gas(200℃~600℃) as the heat transfer fluid. The main research contents include establishing of a three dimensional dynamic mathematic model, study on the coupling heat mechanism of liquid-solid interface moving, interface resistance and conduction, analyzing dynamic thermal storage characteristics of high temperature sensible/ latent heat composite bed-packed thermal storage system. With theoretical and experimental research, this project will lay the foundation for applying the sensible/latent heat composite material for high temperature thermal storage.

英文关键词： high temperature solid thermal storage；sensible-latent thermal storage；thermal storage mechanism；solid-liquid coupling；optimization of thermal storage system