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

Liu, Yang; Xu, Ying; Liu, Xiaoyan; Cheng, Qinglin; Nie, Xin; Dai, Zhonghua

doi:10.2298/tsci180612100l

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…The mathematical model and resolution have been verified to be right in author's another paper [8]. This paper analyzed the affection of the crude oil's properties (density , conductivity coefficient−λ, specific heat c) on the heat transfer process.…”

Section: Numerical Simulation and Results Analysismentioning

confidence: 91%

“…Shutdown pipeline temperature field numerical simulation results is necessary for confirming the safe shutdown time, making restart up scheme and maintenance plan. Liu Yang [8], Xu Ying [9][10], established a new zoning model and analyzed the affection of physical properties of the crude oil and different external factors on the total setting time. diameter of insulating layer, respectively.…”

Section: Physical Modelsmentioning

confidence: 99%

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The affection of Crude Oil Physical Parameters on Heat Transfer

Liu

Zhao

et al. 2022

J. Phys.: Conf. Ser.

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This paper used the partition method mathematical model, considering the oil’s latent heat effects and the cyclical changes of atmospheric temperature, studied on the influence of crude oil properties on heat and mass transfer during the process of shutdown in overhead pipe. This paper used UFD method to simulate the internal temperature field in shutdown overhead pipe with different crude oil’s physical parameters, and gave the solidification cloud charts of medium in typical shutdown time.

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Section: Numerical Simulation and Results Analysismentioning

confidence: 91%

Section: Physical Modelsmentioning

confidence: 99%

The affection of Crude Oil Physical Parameters on Heat Transfer

Liu

Zhao

et al. 2022

J. Phys.: Conf. Ser.

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show abstract

“…By solving the problem composed of the equilibrium equation of heat dissipation of oil products in the pipe and the thermal conductivity equation outside the pipe, and considering the convective heat transfer between the soil outside the pipe and the atmosphere, the analytical solution of oil temperature change with time in the pipe was obtained. On this basis, some scholars [9][10][11][12] considered the transformation of relevant physical parameters over time and the cementation of oil products during the cooling process and solved the variation law of crude oil and soil temperature in pipe numerically.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the thermal process of hot oil pipeline shutdown and restart

Zhan

Xiaohu

et al. 2022

J. Phys.: Conf. Ser.

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For a long transport pipeline in service in the east, the thermodynamic change rules along the pipeline during shutdown and restart were simulated and analyzed respectively, and the characteristics of soil temperature field during restart were clarified. The change of the dangerous section position was analyzed emphatically, and the reasonable shutdown time was determined according to the temperature of the dangerous section position. The research of this paper can provide theoretical support for the determination of shutdown time in the process of shutdown.

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Study on microstructure wax evolution behavior of waxy crude oil during cooling

Zhang

Nie

et al. 2022

THERM SCI

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The microcosmic characteristics of wax evolution of waxy crude oil directly affect the heat transfer process of crude oil. A microscopic experiment was carried out on the wax deposit process of waxy crude oil by polarized light microscopy. The phase change characteristics of wax crystals during wax deposit process were analyzed, and the process of wax crystal precipitation was quantitatively analyzed by the image analysis software ImageProPlus. The results show that the wax deposit process mainly includes wax crystal nucleation, growth and bonding, which together lead to the formation of wax crystal network. The sample oil particle number and the wax crystal area fraction curves have inflection points at 41?C and 38?C, respectively, which are caused by different carbon number alkane content and wax crystal bonding. By analyzing the particle size and particle area curves, it is known that nucleation precipitation and growth are alternately dominant in the early stage of wax crystal growth. Through the wax roundness study, it is found that the growth of wax crystals in the early stage is mainly in the longitudinal direction, and the growth in the late stage is not directional. According to the phase change process of wax crystal, it is proposed that the temperature of the crude oil with porous media grid structure is coalescence point. By using the position point tracking of wax crystal and analysis of the variation characteristics of microscopic parameters, the coalescence point temperature of the sample crude oil in this experiment is 38?.

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

Cited by 5 publications

References 14 publications

The affection of Crude Oil Physical Parameters on Heat Transfer

The affection of Crude Oil Physical Parameters on Heat Transfer

Analysis of the thermal process of hot oil pipeline shutdown and restart

Study on microstructure wax evolution behavior of waxy crude oil during cooling

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