Mechanical stirring can promote uniform distribution of crude oil temperature and increase the heating rate, but the effect is different for different heating methods in crude oil storage tank. In this paper, jet heating and tubular heating are used as the heating methods in the tank, the physical and mathematical models under the synergy of two heating methods and mechanical stirring are established, FVM and SIMPLE algorithm are used to numerical calculate. The results show that mechanical stirring can enhance the flow of crude oil in the tank, affect greatly the temperature and velocity fields of crude oil and improve uniformity of the temperature field. Mechanical stirring has more significant effect on tubular heating for the 1000 m actual oil storage tank. For tubular heating, mechanical stirring can increase the crude oil average velocity 13.8 times, heating rate by 0.123 °C/h, heating efficiency by 8.37 % and reduce the temperature variance by 92.03 % during 2h of heating. At the same time, the indicators of economic benefits for different heating methods are put forward, and the order of energy consumption per unit temperature rise is obtained: Tubular heating > Jet heating > Jet heating and stirring > Tubular heating and stirring.

中文翻译：

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不同加热方式下机械搅拌对储罐内原油传热及流动的影响

机械搅拌可以促进原油温度分布均匀，提高加热速率，但原油储罐内不同加热方式效果不同。本文采用射流加热和管式加热作为罐内加热方式，建立两种加热方式与机械搅拌协同作用下的物理数学模型，并采用FVM和SIMPLE算法进行数值计算。结果表明，机械搅拌可以增强原油在罐内的流动性，对原油的温度场和速度场影响较大，提高温度场的均匀性。对于1000 m实际储油罐来说，机械搅拌对管式加热效果更为显着。对于管式加热，机械搅拌可使原油平均流速提高13.8倍，加热速率提高0.123℃/h，加热效率提高8.37%，加热2h期间温度变化降低92.03%。同时提出了不同加热方式的经济效益指标，得出单位温升能耗的顺序为：管式加热>喷射加热>喷射加热搅拌>管式加热搅拌。