Combined thermal-momentum start-up in long pipes

Patience, Gregory S.; Mehrotra, Anil K.

doi:10.1016/0017-9310(90)90235-m

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…Wang [26] regarded the heat transfer as a pure thermal conduction process. Patience [27] and Nagano [28] took the crude oil properties as constant, which meant there was no natural convection in the models.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the existing studies on the phase change heat transfer of crude oil were to determine the temperature fields or condensate situations at different shutdown times [12][13][14][15][16][17][18][19][20][23][24][25][26][27][28]. In fact, the temperature fields and total freezing time of crude oil in pipeline are two important parameters of oil field operation management, who are closely related to the allowance shutdown time and the pressure required to restart [5,[29][30].…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity analysis of crude oil’s physical properties to total freezing time

Liu

et al. 2020

THERM SCI

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the physical parameters of crude oil are one of the main factors affecting the heat transfer of phase change. A mathematical model for a hot oil overhead pipeline was established, taking latent heat impact, the non-Newtonian properties of crude oil, and nature convection heat transfer into account. Compared with the experimental data, the model and the solution method were correct. And a criterion was made to estimate the crude oil total freezing in a pipeline by tracking the change trajectory of the maximum temperature point. The effects of the crude oil with average properties on the total freezing time in a pipeline were analyzed, and the sensitivity of the different influencing factors was investigated by orthogonal test.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis of crude oil’s physical properties to total freezing time

Liu

et al. 2020

THERM SCI

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“…Convection heat-transfer heat treatment with a moving-phase interface is key to the study of heat transfer of crude oil. 6 – 13 Patience and Mehrotra 9 and Nagano et al 10 neglected the influence of natural convection by assuming the crude oil properties as constant. Chen and Xuan 11 neglected the convective process, treating the heat transfer as purely conductive.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis of heat dissipation factors in a hot oil pipeline based on orthogonal experiments

Nie

Liu

et al. 2019

Science Progress

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The study of phase-change heat-transfer characteristics of crude oil has been one of the hot issues in the field of gathering and transportation. The process of phase-change heat transfer of crude oil involves many complicated problems such as natural convection treatment, latent heat treatment, phase-change interface determination and fluid characteristic change. A mathematical model based on the additional capacity heat method is proposed in this article, and the momentum equations of crude oil liquid phase are presented for Newtonian and non-Newtonian fluids. The aim of this study was to investigate the influence of different factors on the heat transfer performance during the shutdown process of an overhead pipe. Experiments were conducted to verify the model and the solution method; the experimental and model results showed good agreement with a maximum relative error of 4.57%. The temperature fields and solidification conditions of crude oil in pipelines under different shutdown conditions were determined, and the sensitivity of the main effect factors was determined through an orthogonal experiment. The results show that the order of influence was oil initial temperature >thickness of insulating layer >air temperature >thickness of wax layer. The results of the study have important guiding significance on the control of shutdown time and the determination of restarting schemes.

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“…Studies on the unsteady heat transfer problems in crude oil pipelines are mostly focused on the batched transporting crude oils with different outlet temperatures and shutdown and restart problems of waxy crude oil [2][3][4][5][6]. Few studies are on the preheating commissioning of crude oil pipelines.…”

Section: Introductionmentioning

confidence: 99%

Study on Optimizing Operation of Preheating Commissioning for Waxy Crude Oil Pipelines

Zhang

Wang

et al. 2014

Advances in Mechanical Engineering

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A mathematical model is established for the preheating commissioning process of waxy crude oil pipelines. The governing equations are solved by the finite volume method and the finite difference method. Accordingly, numerical computations are made for the Niger crude oil pipeline and the Daqing-Tieling 3rd pipeline. The computational results agree well with the field test data. On this basis, fluid temperature in the process of the preheating commissioning is studied for single station-to-station pipeline. By comparing different preheating modes, it is found that the effect of forward preheating is the best. Under different preheating commissioning conditions, the optimal combination of outlet temperature and flow rate is given.

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Combined thermal-momentum start-up in long pipes

Cited by 4 publications

References 7 publications

Sensitivity analysis of crude oil’s physical properties to total freezing time

Sensitivity analysis of crude oil’s physical properties to total freezing time

Sensitivity analysis of heat dissipation factors in a hot oil pipeline based on orthogonal experiments

Study on Optimizing Operation of Preheating Commissioning for Waxy Crude Oil Pipelines

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