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analysis on influencing factors of buried hot oil pipeline

analysis on influencing factors of buried hot oil pipeline

analysis on influencing factors of buried hot oil pipeline

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2.1. Analysis of influencing factors Material Steel pipe Insulating layer Asphalt Soil Thickness (mm) 4 40 5 – Density  (kg/m 3) 4850 60 900 1700 Coefficient of heat conductivity (W/m·K) 48 0.04 0.15 1.4 Specific heat capacity J/ (K·kg) 500 700 2300 1300 Sep 22 2020Author: Dai ZhonghuaCited by: 1Publish Year: 2019

WO2017024534A1 - Method for determining critical state analysis on influencing factors of buried hot oil pipeline

As shown in Figure 1, Zone II is the unstable working area of the hot oil pipeline; if the hot oil pipeline runs in this zone, when some flow factors reduce the flow, the frictional resistance increases, thus further increasing the flow rate.The propagation of pressure in a gelled waxy oil pipeline analysis on influencing factors of buried hot oil pipelineJan 18, 2011 · Dai Zhonghua, Analysis on influencing factors of buried hot oil pipeline, Case Studies in Thermal Engineering, 10.1016/j.csite.2019.100558, (100558), (2019). Crossref Yichen Wang, Jules J. Magda, Ramachandran Venkatesan, Milind D. Deo, Effect of Emulsified Water on Gelled Pipeline Restart of Model Waxy Crude Oil Cold Flows, Energy & Fuels, Study on the water-heat coupled phenomena in thawing analysis on influencing factors of buried hot oil pipelineDec 22, 2014 · The most obvious water migration occurs in the soil area close to the buried oil pipeline where there is the largest gradient of temperature. And the change of thermal properties caused by the water migration turns out to be one of the most important Cited by: 26Publish Year: 2014Author: Yu Zhao, Bo Yu, Guojun Yu, Wang Li

Steady state analysis of heat transfer in a fully buried analysis on influencing factors of buried hot oil pipeline

The result also showed that if the pipe is buried deeper than five times pipe radius, the difference between the two resistances is less than 1%. By using data of a real buried pipeline, it was analysis on influencing factors of buried hot oil pipelineSteady state analysis of heat transfer in a fully buried analysis on influencing factors of buried hot oil pipelineJan 01, 2020 · Heat loss in a buried pipeline is controlled by the pipeline thermal resistance. Heat loss results in crude oil temperature drop which leads to wax formation and deposition and eventual blocking of the pipeline. This work developed a model of heat transfer in the buried pipeline and obtained closed solution of the thermal resistance of the pipeline with constant heat flux boundary condition.Cited by: 3Publish Year: 2020Author: O.K. Otomi, U.P. Onochie, A.I. ObanorStandard friction prediction model of long-distance hot analysis on influencing factors of buried hot oil pipelineJan 10, 2020 · The predicted results are shown in Table 5 and indicate that the flow rate of the SCADA system data, the upstream-outlet oil temperature, and the downstream-inlet oil temperature are the main influencing factors of the pipeline friction, whereas the ground temperature correlation is small.

Simulation on the Temperature Drop Rule of Hot Oil Pipeline

By using data of a real buried pipeline, it was shown that the thermal resistance increases with depth of burial and burial depth of 0.6-2.5 m is most effective to conserve heat in buried pipelines.Sensitivity analysis of heat dissipation factors in a hot analysis on influencing factors of buried hot oil pipelineSensitivity analysis of heat dissipation factors in a hot oil pipeline based on orthogonal experiments Ying Xu, Xin Nie, Xiao-Yan Liu, Qinglin Cheng, Yang Liu, and Zhonghua Dai Science Progress 2019 103 : 1Cited by: 1Publish Year: 2020Author: Ying Xu, Xin Nie, Xiao-Yan Liu, Qinglin Cheng, Yang Liu, Zhonghua DaiSensitivity analysis of heat dissipation factors in a hot analysis on influencing factors of buried hot oil pipelineAtmospheric temperature is the main factor affecting the total freezing time of crude oil in pipeline. The lower the ambient temperature, the faster the oil dissipates heat. Figure 6 depicts the temperature-drop rule of crude oil at typical temperatures for different times in winter in northeast China. It gives the temperature-drop curves of the pipe center at atmospheric temperatures of 253, 258, and 263 K.Cited by: 1Publish Year: 2020Author: Ying Xu, Xin Nie, Xiao-Yan Liu, Qinglin Cheng, Yang Liu, Zhonghua Dai

Sensitivity analysis of heat - SAGE Journals

ditions 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 SENSITIVITY ANALYSIS OF CRUDE OILS PHYSICAL Key words: influence factor, total freezing time, sensitivity analysis, crude oils physical properties Introduction During the shutdown of a hot oil pipeline in a cold region, the temperature of the crude oil will decrease and the oil will be condensed because of the temperature difference between the inside and outside of the pipe.Numerical simulation of a buried hot crude oil pipeline analysis on influencing factors of buried hot oil pipelineFeb 04, 2010 · Abstract. In this paper a mathematical model is built for a buried hot crude oil pipeline during shutdown, and an unstructured grid and polar coordinate grid are respectively applied to generating grids for the soil region and the three layers in the pipe (wax layer, pipe wall, and corrosion-inhibiting coating).Cited by: 26Publish Year: 2010Author: Cheng Xu, Bo Yu, Zhengwei Zhang, Jinjun Zhang, Jinjia Wei, Shuyu Sun

Numerical simulation of a buried hot crude oil pipeline analysis on influencing factors of buried hot oil pipeline

Dec 01, 2010 · On the basis of the thermal influence region, a finite difference method and a finite volume method are proposed to make thermal analyses on the normal operation of the buried hot oil pipeline in this paper. 2. Mathematical model of the buried hot oil pipeline under normal operation. The thermal system of the buried pipeline contains the convective heat transfer of the oil in the pipeline and the heat conduction outside the pipeline, which is affected Cited by: 63Publish Year: 2010Author: Bo Yu, Chao Li, Zhengwei Zhang, Xin Liu, Jinjun Zhang, Jinjia Wei, Shuyu Sun, Jinping HuangNumerical simulation of a buried hot crude oil pipeline analysis on influencing factors of buried hot oil pipelineA mathematical model for determining the thermal influence zone of buried hot oil pipeline was developed and solved numerically by the finite element method.Numerical Simulation on Soil Temperature Field around analysis on influencing factors of buried hot oil pipelineAnalysis the calculation results show that the time of infusing oil after preheating should be in line with the requirement, and multiple factors obviously influence oil temperature change within pipeline, such as staring time, staring temperature etc. The reliable basis is provided for hot oil pipeline to operate economically and securely.

Method of computing the maximum flow stoppage time

From the above analysis, we can draw the conclusions that the hot oil pipelines range of influence on the earths temperature field is larger when the pipeline is not insulated. It is also higher than the depth of constant temperature layer of the earth, 2.3 The physical model of the buried oil pipelineHot buried Oil Lines - Pipelines, Piping and Fluid analysis on influencing factors of buried hot oil pipelineMar 14, 2007 · I assume you are past the point of thermal analysis and finding the thermal heat loss properties (heat loss shape factor) of the 3-pipe configuration within the ground and are now concentrating on limmiting stresses within the installed pipeline. If the insulation is not rigid, it should be encased within a casing pipe.Factors affecting gasoline prices - U.S. Energy analysis on influencing factors of buried hot oil pipelineThe cost of crude oil is the largest component of the retail price of gasoline, and the cost of crude oil as a share of the retail gasoline price varies over time and across regions of the country. Many factors affect crude oil prices; learn about seven major factors that influence crude oil prices in What Drives Crude Oil

FRP crude pipeline shows thermal analysis on influencing factors of buried hot oil pipeline - Oil & Gas Journal

The study used air temperature, period of operation, pipeline material, oil flow temperature, buried depth, and distance to the pipeline wall as influencing factors. Basic theoryEngineering-Economic Analysis of Pipeline Transportation analysis on influencing factors of buried hot oil pipelineApr 26, 2012 · The frame of engineering-economic characteristics of oil and gas pipelines is outlined in this paper, and some key elements are also discussed on the basis of a large amount of engineering calculation and economic analysis of virtual crude oil pipeline projects, including the economic capacity limits and the economic flow velocity limits for a given pipe diameter, the economically feasible analysis on influencing factors of buried hot oil pipelineDOI 10.1007/s12182-010-0008-x Numerical simulation thermal influence region of a hot oil pipeline, which is adopted by our computation in this paper (Fig. 1, d10, x y d10). With the simplification and hypothesis mentioned above and as Fig. 1 shows, we established a heat transfer mathematical model for a buried hot crude oil pipeline,

Case Studies in Thermal Engineering | Vol 16, December analysis on influencing factors of buried hot oil pipeline

select article Analysis on influencing factors of buried hot oil pipeline. analysis on influencing factors of buried hot oil pipeline Analysis on influencing factors of buried hot oil pipeline. Dai Zhonghua. Article 100558 Download PDF. Article preview. select article Experimental study on fire-extinguishing efficiency of protein foam in diesel pool fire.Analysis on influencing factors of buried hot oil pipeline analysis on influencing factors of buried hot oil pipeline4 rows · Dec 01, 2019 · In the following comparative analysis, all the other parameters were unchanged except for special analysis on influencing factors of buried hot oil pipelineCited by: 1Publish Year: 2019Author: Dai Zhonghua Thickness (mm) 4 40 5 Density (kg/m 3) 4850 60 900 1700 Coefficient of heat conductivi analysis on influencing factors of buried hot oil pipeline 48 0.04 0.15 1.4 Specific heat capacity J/ (K·k analysis on influencing factors of buried hot oil pipeline 500 700 2300 1300 See all 4 rows on www.sciencedirect analysis on influencing factors of buried hot oil pipelineAnalysis of Hot Oil Pipeline Stress Influencing Factors analysis on influencing factors of buried hot oil pipelineIn this paper, in order to explore the main factor of hot oil pipeline stress and the location of key points, we build the XX hot oil pipeline stress analysis model used CAESAR II software, analysis on influencing factors of buried hot oil pipeline

Analysis of Hot Oil Pipeline Stress Influencing Factors analysis on influencing factors of buried hot oil pipeline

In this paper, in order to explore the main factor of hot oil pipeline stress and the location of key points, we build the XX hot oil pipeline stress analysis model used CAESAR II software, analysis of the impact of changes in temperature and pressure on piping stress when hot oil pipeline running, draw hot oil pipeline stress distribution, clearly identifies the location of key points of stress concentration, and we have come to that temperature is a major factor Author: Xiao Nan Wu, Shi Juan Wu, Hong Fang Lu, Jie Wan, Jia Li Liu, Wei Tao Li, Zi Lin LiuPublish Year: 2014A numerical external pitting damage prediction method of analysis on influencing factors of buried hot oil pipelineThe work introduces a numerical external damage prediction method for buried pipelines. The external pitting initiation and corrosion rate of oil or gas pipelines are affected by pipeline age, physicochemical properties of soils and cathodic protection performance as well as coating conditions.2.1. Analysis of influencing factors Material Steel pipe Insulating layer Asphalt Soil Thickness (mm) 4 40 5 Density (kg/m 3) 4850 60 900 1700 Coefficient of heat conductivity (W/m·K) 48 0.04 0.15 1.4 Specific heat capacity J/ (K·kg) 500 700 2300 1300 Sep 22 2020Author: Dai ZhonghuaCited by: 1Publish Year: 2019

2-D Conduction: Finite-Difference Methods

Shape Factor S: q= Sk(T1T2) Shape Factors, Cont. Example Buried Hot Pipe A pipeline, used for the transport of crude oil, is buried in the earth such that its centerline is a distance of 1.5 m below the surface. The pipe has an outer diameter of 0.5 m and is insulated with a (PDF) Analysis on influencing factors of buried hot oil analysis on influencing factors of buried hot oil pipelineAnalysis on influencing factors of buried hot oil pipeline analysis on influencing factors of buried hot oil pipeline Fluent software was used for numerical simulation and analysis. The influence factors such as soil depth, atmospheric temperature analysis on influencing factors of buried hot oil pipeline

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