Abstract: Polyalcohol is considered as a promising candidate of phase change material for heat storage,but it presents poor heat conduction performance.Fiber-enhanced polyalcohol binary system combines polyalcohol with copper fiber to improve its heat conduction.FLUENT software is used to simulate the temperature field of polyalcohol binary system PE/TRIS in this study,in which molar capacity of polyalcohol binary system PE/TRIS is fitted to polynomial equations.Simulation results present the same trend of temperature distribution in the fiber-enhanced polyalcohol binary system as experimental data.Therefore,the physical model for the simulation is reliable.The simulation shows that fiber planes do contribute to heat conduction.The heat flux first declines sharply with time with or without fiber planes inserted,and then becomes steady.The heat conducted through fiber planes in fiber-enhanced polyalcohol is the main heat flux and is comparable with the heat conducted through five boundary walls.The fiber-enhanced polyalcohol binary system shows quicker response to heat input than the polyalcohol binary system PE/TRIS without fiber.To perfect the temperature field,fiber planes parallel to the bottom copper board should be added to the polyalcohol heat storage system.

Key words: polyalcohol, heat conduction performance, temperature, heat transfer enhancement, heat storage

摘要： 多元醇热传导系数较低,纤维复合相变材料将纤维材料与多元醇联合起来以改善多元醇的传热特性。FLUENT 数值计算软件用于模拟多元醇二元体系PE/TRIS 的贮热温度场。通过实验验证,模拟时建立的物理模型是可信的。模拟结果显示,插入多元醇的铜纤维可改进多元醇的传热性能,通过铜纤维传递的热量和通过容器壁传递的热量相当。为了进一步提高多元醇的热响应特性,有必要插入与底部加热板平行的铜纤维。

关键词: 多元醇, 热传导性能, 温度, 强化传热, 贮热