Research on heat transfer characteristics of crude oil storage tank heated by jet in combination with mechanical stirring

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-05-08 DOI:10.1016/j.csite.2025.106227

Hang Dong , Xiaowan Liang , Xiaonian Xiong , Mingyu Lei , Jian Zhao

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Abstract

Mechanical stirring can enhance the jet heating of storage tanks. However, the internal heat transfer characteristics during heating and the effects of different agitators are unclear. This paper simulated the heating process of single jet and three agitators under different stirring speeds, considering crude oil rheology and wax crystal latent heat, using the SIMPLE algorithm. Results show that mechanical stirring spreads jet - introduced heat across the domain, making the temperature field more uniform. The agitator B, with higher impact flow velocity, a broader velocity core, and wider reflux coverage, was most effective. After 4 - hour heating, it raised the average temperature by 0.13 °C over the single jet, reduced temperature variance by 80 %, and increased the heating rate by 12.5 %. At high speed (350 rpm), the three impellers showed little difference. At low speed (150 rpm), the agitator B also increased the minimum temperature. After 4 - hour heating, the domain's minimum temperature was 1.04 °C higher than the single jet, and 0.35 °C and 0.37 °C higher than the agitators A and C. The findings also apply to large - scale oil storage facilities and different crude oil types. Both high-speed stirring and low-speed stirring were comprehensively evaluated from various perspectives.

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射流加热与机械搅拌相结合的原油储罐传热特性研究

机械搅拌可以增强储罐的射流加热。然而，加热过程中的内部传热特性和不同搅拌器的影响尚不清楚。本文采用SIMPLE算法，在考虑原油流变和蜡晶潜热的情况下，模拟了不同搅拌速度下单喷嘴和三台搅拌器的加热过程。结果表明，机械搅拌将射流引入的热扩散到整个区域，使温度场更加均匀。具有较高冲击流速、较宽流速芯和较宽回流覆盖范围的搅拌器B最有效。加热4小时后，单喷嘴平均温度提高0.13℃，温度差异减小80%，加热速率提高12.5%。在高速（350转/分）时，三个叶轮的差别不大。在低速时（150转/分），搅拌器B也提高了最低温度。加热4 h后，该区域的最低温度比单一射流高1.04℃，比搅拌器A和C分别高0.35℃和0.37℃，这一结果同样适用于大型储油设施和不同原油类型。从多个角度对高速搅拌和低速搅拌进行了综合评价。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.