高压下三种脂肪酸甲酯液相导热系数的实验研究  

Experimental Research on the Thermal Conductivity of Three Fatty Acid Methyl Esters in High Pressure

作　　者：范晶[1,2] 孟庆龙[1] 宋粉红 FAN Jing;MENG Qing-Long;SONG Fen-Hong(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,China;Key laboratory of Thermo-Fluid Science and Engineering,Ministry of Education,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012 [2]西安交通大学热流科学与工程教育部重点实验室,西安710049

出　　处：《工程热物理学报》2022年第1期182-189,共8页Journal of Engineering Thermophysics

基　　金：吉林省自然科学基金项目(No.20200201223JC);吉林市杰出青年人才培养专项(No.20190104134);热流科学与工程教育部重点实验室开放基金项目(No.KLTFSE2018KFJJ03)。

摘　　要：生物柴油是新型环境友好型替代能源,其主要成分为碳数分布在C6∼C24的长链脂肪酸酯。利用瞬态单丝法导热系数测量系统在272∼352 K温度范围内、0.1∼15 MPa压力范围内对三种生物柴油组成成分壬酸甲酯、庚酸甲酯和己酸甲酯的液相导热系数进行了实验测量,并将导热系数拟合成关于温度和压力的方程,壬酸甲酯、庚酸甲酯和己酸甲酯导热系数实验值与拟合方程的计算值最大相对偏差分别为−0.18%、0.12%和−0.07%,平均绝对偏差分别为0.06%、0.05%和0.02%。导热系数实验系统测量的扩展不确定度小于2%(置信区间0.95),重复性好于±0.5%。Biodiesel is a novel environmentally friendly alternative energy source,and its main component is long-chain fatty acid esters with carbon numbers range from C6 to C24.The liquid thermal conductivity of three biodiesel components:methyl nonanoate,methyl enanthate and methyl caproate was measured by means of transient single hot-wire method at the temperature range of 272 K to 352 K and the pressure range of 0.1 MPa to 15 MPa,and the thermal conductivity was fitted to an equation about temperature and pressure.The maximum relative deviations of the thermal conductivity of methyl nonanoate,methyl heptanoate,and methyl caproate from the calculated value of the fitting equation were−0.18%,0.12%and−0.07%,the average absolute deviation is 0.06%,0.05%and 0.02%,respectively.The expanded uncertainty of thermal conductivity experimental system measurement is less than 2%(confidence interval 0.95),and the repeatability is batter than±0.5%.

关 键 词：生物柴油 壬酸甲酯 庚酸甲酯 己酸甲酯 导热系数 

分 类 号：TK123[动力工程及工程热物理—工程热物理]