浮顶储油罐传热系数的变化规律及影响因素研究

目前国内外常用的地上大型原油储罐主要是浮顶罐,研究其传热系数的变化规律对于降低储罐生产能耗,节约成本具有重要的现实意义。在建立浮顶罐内原油理论模型基础上,为避免由于平均温度的不当选取,使得计算误差不断得到放大,采用分步集总参数法计算浮顶储油罐的传热系数,通过对浮顶类型、储罐液位、储罐体积、外界环境温度、风速等影响因素的分析,总结浮顶罐罐底、罐壁、罐顶以及总传热系数变化规律,为准确预测大型浮顶储油温降提供了理论依据。

The Study of Variation Law and Influence Factors of Heat Transfer Coefficient for Floating Roof Storage Tank

The large -scale aboveground oil storage tanks commonly used at home and abroad are mainly floating roof storage tank. The research on the variation law of heat transfer coefficient has important prac- tical significance for energy consumption reduction and cost savings. In order to avoid constantly enlarge- ment of calculation error caused by the improper average temperature selection, the LumpedCapacity a- nalysis method is used to calculate the heat transfer coefficient of floating roof storage tank based on the crude oil theoretical model in floating roof storage tank. The influencial factors including the type of float- ing roof, fluid level, tank volumes, the environment temperature and wind velocity are analyzed. The variation law of total heat transfer coefficient and the heat transfer coefficient in the bottom, wall and top of floating roof tank are summed up to provide technical support for accurate prediction of oil temperature drop.