scholarly journals A model of wax deposition under oil-gas two-phase stratified flow in horizontal pipe

2018 ◽  
Vol 73 ◽  
pp. 80 ◽  
Author(s):  
Jimiao Duan ◽  
Jiang Li ◽  
Huishu Liu ◽  
Kecheng Gu ◽  
Jinfa Guan ◽  
...  
Keyword(s):  
Mass Flux ◽  
Molecular Diffusion ◽  
Diffusion Mechanism ◽  
Interface Temperature ◽  
Solubility Curve ◽  
Wax Deposition ◽  
Flow Loop ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Oil Gas

A model of wax deposition based on molecular diffusion mechanism, for oil-gas two-phase stratified pipe flow is developed. In the model, unidirectional fully developed flow analyses of momentum, heat and mass transfer are presented. And, a cube cage model is used to describe the wax deposit structure considering the effect of oil flow shear on the deposit. Calculation of wax deposit is compared well with a flow loop experiment. In particular, the model could give the wax deposit forming a crescent shape at the cross section of pipe, which is observed in different experiments. Furthermore, the cause of forming a crescent shape is revealed, which is indicated by the non-uniform circumferential distribution of mass flux for wax deposition along the pipe wall wetted by the oil. The mass flux from oil bulk flow to the oil-deposit interface is closely related to three parameters, diffusivity at oil-deposit interface, the temperature gradient at the oil-deposit interface at different time, and the slope of the wax solubility curve at oil-deposit interface temperature.

Wax Deposition in the Oil/Gas Two-Phase Flow for a Horizontal Pipe

2011 ◽  
Vol 25 (4) ◽  
pp. 1624-1632 ◽  
Author(s):  
Jing Gong ◽  
Yu Zhang ◽  
Lulu Liao ◽  
Jimiao Duan ◽  
Pengyu Wang ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Wax Deposition ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Oil Gas

Pressure Drop for Oil-Gas Two-Phase Flow Through Straight Horizontal Pipe

2007 ◽  
Author(s):  
Wenhong Liu ◽  
Liejin Guo ◽  
Ximin Zhang ◽  
Kai Lin ◽  
Long Yang ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Flow Through ◽  
Oil Gas

New Revised Correlation to Predict Pressure Drop for Oil-Gas Two-Phase Flow Through Horizontal Pipe

2007 ◽  
Author(s):  
L. Wenhong ◽  
G. Liejin ◽  
Z. Ximin ◽  
L. Kai ◽  
Y. Long ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Flow Through ◽  
Oil Gas

scholarly journals Experimental Study of HFE 7000 Refrigerant Condensation in Horizontal Pipe Minichannels

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6886
Author(s):  
Małgorzata Sikora ◽  
Tadeusz Bohdal ◽  
Karolina Formela
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Transfer Coefficient ◽  
Pressure Drop ◽  
Transfer Coefficient ◽  
Flux Density ◽  
Mass Flux ◽  
Internal Diameter ◽  
Two Phase ◽  
Horizontal Pipe

This article presents the results obtained from our own experimental investigations on heat exchange and pressure drop during the condensation flow of the HFE 7000 refrigerant in pipe minichannels with an internal diameter of di = 1.2–2.5 mm. The influence of vapor quality x and the mass flux density G on the two-phase flow pressure drops and heat transfer is presented. The tests were performed for the mass flux density range of G = 110–4700 kg/m2s, saturation inlet temperature of Ts = 36–43 °C and heat flux density of q = 1 ÷ 20 kW/m2. The pressure drop characteristics and heat transfer coefficient as a function of the internal diameter of minichannels are illustrated. The results of experimental research on the heat transfer coefficient and two-phase pressure drop are compared with correlations developed by other authors. The best accuracy has a comparison of experimental study with correlation of Rahman-Kariya-Miyara et al. and Mikielewicz et al.

Wax Deposition Experiment with Highly Paraffinic Crude Oil in Laminar Single-Phase Flow Unpredictable by Molecular Diffusion Mechanism

2018 ◽  
Vol 32 (3) ◽  
pp. 3406-3419 ◽  
Author(s):  
Charlie Van Der Geest ◽  
Vanessa C. Bizotto Guersoni ◽  
Daniel Merino-Garcia ◽  
Antonio Carlos Bannwart
Keyword(s):  
Crude Oil ◽  
Single Phase ◽  
Molecular Diffusion ◽  
Diffusion Mechanism ◽  
Phase Flow ◽  
Single Phase Flow ◽  
Wax Deposition ◽  
Paraffinic Crude

Pressure Drop for Oil-Gas Two-Phase Flow Through Straight Horizontal Pipe

2007 ◽  
Author(s):  
Wenhong Liu ◽  
Liejin Guo ◽  
Ximin Zhang ◽  
Kai Lin ◽  
Long Yang ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Flow Through ◽  
Oil Gas

Multifunction Expansion Design of the Wellbore Multiphase-Flow Experimental System

2013 ◽  
Vol 732-733 ◽  
pp. 421-425
Author(s):  
Hui Rong Liang ◽  
Jian Ning Xu ◽  
Duan Yin Zhu
Keyword(s):  
Heat Transfer ◽  
Multiphase Flow ◽  
Large Scale ◽  
Experimental System ◽  
Phase Flow ◽  
Annular Space ◽  
Flow Loop ◽  
Two Phase ◽  
Mixed Modes ◽  
Oil Gas

In this paper, a set of wellbore multiphase flow experimental system with several functions is designed. The system can complete a flow loop of the two-phase flow or the multiphase flow of oil, gas, and water in a level, vertical or tilt angle tube, used to study the flow law of these different mixed modes in the inner tube and the annular space of the wellbore and the heat transfer law between the fluids in the inner tube and the annular space. It is a set of large-scale and complete experimental system to research the multiphase flow.

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