热物性数据精度对熔融盐传热性能计算的影响  

Influence of Precision of Thermophysical Properties Data on Calculation of the Heat Transfer Performance of Molten Salts

作　　者：郭航[1] 杨进学[1] 叶芳[1] 吴玉庭[1] 马重芳[1] 

机构地区：[1]北京工业大学环境与能源工程学院,传热强化与过程节能教育部重点实验室及传热与能源利用北京市重点实验室,北京100124

出　　处：《北京工业大学学报》2013年第4期619-623,共5页Journal of Beijing University of Technology

基　　金：国家973计划资助项目(2010CB227103)

摘　　要：熔融盐是太阳能高温热发电技术中颇具前景的传热蓄热介质.其黏度、密度、比热容和导热系数与熔融盐的传热过程密切相关.利用函数误差理论,从各种传热条件下的经典换热公式出发,分别计算了对传热性能影响+10%和-10%时各热物性的误差值,并结合热物性数据的误差分析,确定了热物性数据对传热性能计算的影响程度.As the heat transfer and storage medium, the molten salts have the good prospect in the high- temperature solar thermal power technology. The viscosity, density, specific heat and thermal conductivity are closely related to the heat transfer process of molten salts. In this paper, the errors of every thermophysical property that causes the heat transfer performance to deviate at ＋ 10% or - 10% were calculated under a variety of classic heat exchange equations, respectively, according to the function error theory. Using the error analysis method, the influence of thermophysical properties data on the heat transfer performance calculation of molten salts was obtained.

关 键 词：熔融盐 黏度 密度 比热容 导热系数 传热 太阳能 

分 类 号：TK124[动力工程及工程热物理—工程热物理]