Study on influence of mechanical stirring on heat transfer characteristics during jet heating of crude oil storage tank

被引：0
|
作者：
Zhao J. [1 ,3 ]
Zhou X. [1 ,3 ]
Xia D. [2 ]
Dong H. [1 ,3 ]
机构：
[1] School of Petroleum Engineering, Northeast Petroleum University, Heilongjiang, Daqing
[2] Research Institute of Exploration and Development, Daqing Oilfield Company Ltd., Heilongjiang, Daqing
[3] Energy-saving and Consumption-reducing Laboratory Surface Engineering Pilot Test Center, China National Petroleum Corporation, Heilongjiang, Daqing
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 05期
关键词：
flow; heat transfer; jet heating; mechanical stirring; numerical simulation;
D O I：
10.11949/0438-1157.20230006
中图分类号：
学科分类号：
摘要：
The physical and mathematical models of heat transfer and flow processes in a large floating roof storage tank under the synergy of jet heating and mechanical stirring were established. The sliding grid technique was used to model the stirring impeller. The flow and heat transfer laws of strong and weak buoyant jet heating processes were numerically simulated based on the finite volume method (FVM). The results show that compared with the strong buoyancy jet, the heating rate of the weak buoyancy jet can be increased by 74%, and the heating time required to reach the same temperature can be shortened by 42%. For the strong buoyant jet heating process, the increase of mechanical stirring can significantly increase the overall velocity in the computational domain, enhance the heat exchange between hot and cold media, increase the heating rate by 9.6%. It can also make more uniform oil temperature distribution in the computational domain and a 17% reduction in temperature variance. For the weak buoyancy jet heating process, although increasing the stirring effect can only increase the heating rate by 0.9%, it can reduce the temperature variance by 29%. Mechanical stirring has a more significant effect on the heating rate of strong buoyant jet and the temperature uniform distribution of weak buoyant jet. It is found that mechanical stirring can increase the heating efficiency of strong buoyant jet by 0.7%. In addition, further studies have found that the installation height of agitator plays an important function in eliminating the low-temperature area at the bottom of the actual storage tank and regulating the oil temperature distribution. The numerical simulation results can provide a significant reference for the structural design of mechanical agitator. © 2023 Chemical Industry Press. All rights reserved.
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页码：1982 / 1999
页数：17
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