碳酸二乙酯液相导热系数实验研究  

Thermal Conductivity of Diethyl Carbonate in Liquid Phase

作　　者：宋琳丰[1] 吴江涛[1] 刘志刚[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《高校化学工程学报》2008年第2期183-187,共5页Journal of Chemical Engineering of Chinese Universities

基　　金：全国优秀博士论文作者专项资金(200540);教育部新世纪优秀人才支持计划(NCET-05-0836)

摘　　要：为了给可替代清洁燃料的研究提供急需的基础物性数据,利用瞬态单热线法对温度区间为250～390K、压力区间为0.1～30MPa的碳酸二乙酯(DEC)的导热系数进行了实验研究。将实验数据拟合成关于温度和压力的导热系数方程,并分析了碳酸二乙酯导热系数与温度和压力的关系,方程采用完全三次多项式形式。结果表明,碳酸二乙酯的导热系数随温度升高而减小,随压力的升高而增大。实验数据与拟合方程计算值的最大偏差为-1.94%,绝对平均偏差为0.84%。另外,文中对改进的瞬态单热线测量导热系数实验装置以及所采用的测量系统进行了说明。In order to provide the urgently needed thermophysical data for the research of alternative clean fuels,the thermal conductivity of diethyl carbonate（DEC） in liquid phase was measured by transient single hot-wire method at the ranges of 250～390 K and 0.1～30 MPa.The measurement system and the used apparatus of transient single hot-wire method were described in detail.Using a perfect cubic polynomial formula,the measured thermal conductivity of DEC was correlated as a function of temperature and pressure,and the relationships of the thermal conductivity of DEC with temperature and pressure were analyzed separately.The results show that the thermal conductivity of DEC increases with the increase of temperature and decreases with the increase of pressure.The maximum deviation and the absolute average deviation between the measured thermal conductivities of DEC and the calculated ones are -1.94% and 0.84%,respectively.

关 键 词：导热系数 瞬态热线法 碳酸二乙酯 清洁燃料 

分 类 号：O552.422[理学—热学与物质分子运动论] O623.662[理学—物理]