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Research on Exergy Flow Composition and Exergy Loss Mechanisms for Waxy Crude Oil Pipeline Transport Processes

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  • Qinglin Cheng

    (Key Lab of Ministry of Education for Enhancing the Oil and Gas Recovery Ratio, Northeast Petroleum University, Daqing, 163318, China)

  • Yifan Gan

    (Key Lab of Ministry of Education for Enhancing the Oil and Gas Recovery Ratio, Northeast Petroleum University, Daqing, 163318, China)

  • Wenkun Su

    (Key Lab of Ministry of Education for Enhancing the Oil and Gas Recovery Ratio, Northeast Petroleum University, Daqing, 163318, China)

  • Yang Liu

    (Key Lab of Ministry of Education for Enhancing the Oil and Gas Recovery Ratio, Northeast Petroleum University, Daqing, 163318, China)

  • Wei Sun

    (Key Lab of Ministry of Education for Enhancing the Oil and Gas Recovery Ratio, Northeast Petroleum University, Daqing, 163318, China)

  • Ying Xu

    (Key Lab of Ministry of Education for Enhancing the Oil and Gas Recovery Ratio, Northeast Petroleum University, Daqing, 163318, China)

Abstract

The basic theory of exergy was used to derive the formulae of physical and chemical exergy in the process of pipeline transportation, combined with the effect of wax deposition on the thermodynamic parameters including specific heat, density, chemical potential and concentration gradient. On the basis of this, the expression of various exergy losses were derived, and the exergy balance model was then built in the process. For the case study, a waxy crude oil pipeline in China was selected. The mechanism for how wax deposition affected the physical and chemical exergy loss was studied through analyzing the axial pipeline distribution of pressure, temperature, flow rate and thickness of insulation layer. Finally, under the design flow of 66 × 10 3 kg·h −1 , the orthogonal experimental analysis method was used for comparing the degree of specific factors which could influence the total exergy efficiency. The highest exergy efficiency combination of working conditions was then determined. This research could provide a theoretical basis for guiding safe and economic operation in the actual pipeline transportation process.

Suggested Citation

  • Qinglin Cheng & Yifan Gan & Wenkun Su & Yang Liu & Wei Sun & Ying Xu, 2017. "Research on Exergy Flow Composition and Exergy Loss Mechanisms for Waxy Crude Oil Pipeline Transport Processes," Energies, MDPI, vol. 10(12), pages 1-20, November.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:12:p:1956-:d:120311
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    References listed on IDEAS

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    1. Chaczykowski, M. & Osiadacz, A.J. & Uilhoorn, F.E., 2011. "Exergy-based analysis of gas transmission system with application to Yamal-Europe pipeline," Applied Energy, Elsevier, vol. 88(6), pages 2219-2230, June.
    2. Li, Yaopeng & Jia, Ming & Chang, Yachao & Kokjohn, Sage L. & Reitz, Rolf D., 2016. "Thermodynamic energy and exergy analysis of three different engine combustion regimes," Applied Energy, Elsevier, vol. 180(C), pages 849-858.
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    Cited by:

    1. Yong Wang & Nan Wei & Dejun Wan & Shouxi Wang & Zongming Yuan, 2019. "Numerical Simulation for Preheating New Submarine Hot Oil Pipelines," Energies, MDPI, vol. 12(18), pages 1-26, September.
    2. Dario Friso & Lucia Bortolini & Federica Tono, 2020. "Exergetic Analysis and Exergy Loss Reduction in the Milk Pasteurization for Italian Cheese Production," Energies, MDPI, vol. 13(3), pages 1-16, February.
    3. Dongxu Han & Qing Yuan & Bo Yu & Danfu Cao & Gaoping Zhang, 2018. "BFC-POD-ROM Aided Fast Thermal Scheme Determination for China’s Secondary Dong-Lin Crude Pipeline with Oils Batching Transportation," Energies, MDPI, vol. 11(10), pages 1-25, October.

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