scholarly journals Studies on energy consumption of crude oil pipeline transportation process based on the unavoidable exergy loss rate

2018 ◽  
Vol 12 ◽  
pp. 8-15 ◽  
Author(s):  
Qinglin Cheng ◽  
Anbo Zheng ◽  
Lu Yang ◽  
Chenlin Pan ◽  
Wei Sun ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Crude Oil ◽  
Loss Rate ◽  
Exergy Loss ◽  
Pipeline Transportation ◽  
Oil Pipeline ◽  
Transportation Process

Deduction and Analysis of Driving Exergy Loss in Oil Pipeline System

2013 ◽  
Vol 291-294 ◽  
pp. 688-692 ◽  
Author(s):  
Qing Lin Cheng ◽  
Meng Zhang ◽  
Xuxu Wang
Keyword(s):  
Energy Consumption ◽  
Fluid Mechanics ◽  
Analytic Formula ◽  
Exergy Loss ◽  
Pipeline System ◽  
Pipeline Transportation ◽  
Element Analysis ◽  
Oil Pipeline ◽  
Insulation Thickness ◽  
Operation Parameters

Pipeline transportation is a substance conveying process that makes crude oil flowing from first station to ultimate station and at the same time takes a certain amount of driving energy for cost. Based on related theories of engineering fluid mechanics, mathematics analytic formula of driving exergy in oil pipeline transportation is deduced by micro-element analysis. We can get the conclusion that driving exergy loss has a positive correlation with diameter and throughput, and also a contrary trend with insulation thickness and outbound temperature by analyzing the influence on driving exergy loss from operation parameters in pipeline process,. This research can provide theoretical guidance for energy consumption classification, and further more, the technical support for energy consumption in pipeline system.

Molecular Dynamics Study on Microscopic Mechanism of Dissolution, Diffusion and Aggregation Process for Waxy Molecules in the Process of Waxy Crude Oil Pipeline Transportation

2019 ◽  
Author(s):  
Yifan Gan ◽  
Qinglin Cheng ◽  
Zhihua Wang ◽  
Jinwei Yang ◽  
Wei Sun ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Crude Oil ◽  
Dynamics Simulation ◽  
Precipitation Process ◽  
Pipeline Transportation ◽  
Waxy Crude Oil ◽  
Wax Precipitation ◽  
Waxy Crude ◽  
Oil Pipeline ◽  
Transportation Process

Abstract In order to ensure the safe and economic operation of waxy crude oil transportation process, the micro-dynamic mechanism and thermodynamic characteristics of wax precipitation process at nanoscale are necessary to be revealed. Here, we established the molecular dynamics model to characterize the phase transition and precipitation behavior of waxy molecules in multiphase system (including oil, asphaltene and water), the relative error between simulated results and experimental data measured by Dutour et al. (2002) is less than 5%. Under the coupling effect of different operation parameters, the molecular dynamics simulation was employed, the simulated results showed that the spherical paraffin crystals underwent the process of dissolution, diffusion and aggregation, then the waxy cluster crystals with larger amount but smaller volume would form, and it would deposit on the outer wall under the concentration gradient. The influence mechanism of different operating parameters on wax precipitation was analyzed, of which the increase of temperature and water cut will decrease the wax precipitation, while the increase of pressure will enhance the wax precipitation rate, furthermore, by means of the hydrogen bonding and the effect of similar dissolution, the water and asphaltene molecules also affect the wax precipitation process at molecular-scale. The researches of this paper provide the theoretical support for the paraffin removal and control in waxy crude oil pipeline transportation process.

scholarly journals Studies of the unavoidable exergy loss rate and analysis of influence parameters for pipeline transportation process

2018 ◽  
Vol 12 ◽  
pp. 517-527 ◽  
Author(s):  
Qinglin Cheng ◽  
Anbo Zheng ◽  
Lu Yang ◽  
Hao Wu ◽  
Lili Lv ◽  
...  
Keyword(s):  
Loss Rate ◽  
Exergy Loss ◽  
Pipeline Transportation ◽  
Transportation Process

Energy Saving for a Chinese Crude Oil Pipeline

2014 ◽  
Author(s):  
Yang Yu ◽  
Changchun Wu ◽  
Xiaokai Xing ◽  
Lili Zuo
Keyword(s):  
Energy Consumption ◽  
Crude Oil ◽  
Energy Saving ◽  
Heating Temperature ◽  
Physical Property ◽  
Optimal Operation ◽  
Oil Pipeline ◽  
Simulation And Optimization ◽  
Shengli Oilfield ◽  
Consumption Cost

The Dongying-Linyi Crude Oil Pipeline, transporting the crude oil from Shengli Oilfield to the outside, is one of the most important pipelines in East China. It is of great significance for saving energy, reducing emissions and improving the economy by optimizing pipeline operation. By analyzing the daily operation reports and monthly energy consumption reports, the energy consumption situation of the pipeline is revealed. Then the crude oil from Shengli Oilfield is collected, and its physical property is tested and researched. Based on the topological structure, the technological process and the operation philosophy of the pipeline, the mathematical models for the optimal operation and the energy consumption are built and the corresponding algorithm is introduced. With the models and the algorithms mentioned above, a computer software is developed for the operation simulation and optimization of the pipeline. Combining with practice, three energy-saving measures for the pipeline are analyzed, including reduction of oil heating temperature, operation matching with peak-valley electricity price and operation matching with the combination of flow rates in a planned operation period. In addition, these energy-saving measures are evaluated by the software with several examples. It turns out that: the first measure can considerably reduce the energy consumption and the energy consumption cost of the pipeline; the second could reduce the energy consumption cost of the pipeline a lot, while may make the energy consumption go higher a little; the third could slightly lower the equivalent energy consumption and the energy cost at the same time, but the effect of it is not obvious.

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