Condensation characteristics of natural gas in the supersonic liquefaction process

Bian, Jiang; Cao, Xuewen; Yang, Wen; Song, Xiaodan; Xiang, Chengcheng; Gao, Song

doi:10.1016/j.energy.2018.11.102

Cited by 108 publications

(21 citation statements)

References 31 publications

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“…According to the data provided by the National Institute of Standards and Technology (NIST), the surface tension model of liquid methane was fitted . To obtain more accurate results, a piecewise function is adopted.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Liquefied natural gas (LNG) is the cleanest form of natural gas due to the removal of water, sour gas and other impurities before liquefaction, the physical volume of which is only about 1/625 after liquefaction at low temperature . The supersonic separation technology is extensively utilized in the purification and liquefaction of natural gas . In the supersonic separation process, the cooling effect at the extremely nonequilibrium state of nozzle cause the natural gas condenses to the liquid phase; then, the condensed liquids are removed from the gas–liquid mixture owing to the high centrifugal force generated by swirling devices.…”

Section: Introductionmentioning

confidence: 99%

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A new liquefaction method for natural gas by utilizing cold energy and separating power of swirl nozzle

et al. 2019

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A swirl nozzle with a central body was newly designed to make full use of the cold energy and separating power, and the coupling of swirling flow and condensation was realized based on a condensation model, a droplet surface tension model and a Reynolds stress model turbulence model. The flow and condensation characteristics of methane gas under supersonic swirling flow conditions were studied. The results show that the flow and condensation parameter distribution in the swirl nozzle are similar under varying swirling intensities, but the swirling performance improves with the increase in swirling intensity, and a tangential velocity is beneficial before the gas enters the nozzle. As the inlet temperature decreases or the inlet pressure increases, the liquefaction efficiency increases, and the gas condensation process can be promoted. With the advancement of the initial nucleation position and the increase in the droplet radius, the separation efficiency of the swirl nozzle increases.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new liquefaction method for natural gas by utilizing cold energy and separating power of swirl nozzle

et al. 2019

Self Cite

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“…In the simulations presented here, the primary phase is natural gas, and the secondary phase is water-liquid. A second-order upwind scheme was used to increase the accuracy of calculation (Bian et al 2018c(Bian et al , 2019. The absolute criteria of simulation residuals were set to be 10 -5 for all the dependent variables.…”

Section: Mathematical Modelmentioning

confidence: 99%

Flow Characteristics of Wet Natural Gas in Different Throttling Devices

Cao¹,

Chu²,

Song³

et al. 2019

Frontiers in Heat and Mass Transfer

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Wet natural gas widely exists in the natural gas industry, and the selection of throttling devices plays an important role in wet natural gas transportation. In order to study the flow field characteristics of different throttling devices in wet natural gas pipelines, a set of Laval nozzles, orifice plates, and plate valves have been designed. The standard k-ε model was selected for numerical simulation. By changing inlet pressure, inlet temperature or volume fraction of water-liquid, the pressure field and temperature fields of different throttling devices were obtained, and the influence of the presence of a shockwave on the flow fields of the throttling devices was analyzed. Different throttling devices have significantly different operating characteristics. Therefore, appropriate throttling devices should be selected in different conditions in order to control the pressure of wet natural gas transportation and reduce gas hydrate formation. The present simulation results show that under identical conditions, the throat pressure and temperature of the Laval nozzle are the lowest, the throat pressure of the orifice plate is the highest, and the throat temperature of the plate valve is the highest.

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“…At the outlet of the 3S, temperature and pressure of fluid reached –119 °C and 16 bar. Bian et al considered a real gas effect in the proposed nucleation model unlike others. Their study shows that the latent heat of condensation plays a dominant role in the change of the droplet growth rate of the binary mixture (methane‐ethane).…”

Section: Introductionmentioning

confidence: 99%

Effect of the Geometry of a Swirl Generator on Energy Loss and Shockwave Position in Arina Nozzle

Majidi

Farhadi

2020

Chem Eng & Technol

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To investigate the effect of the swirl generator (SG) on shockwave position and pressure drop, 3D simulation is conducted and validated by Arina's study. An increase of the blade number, height, and end angle leads to shockwave displacement toward the nozzle outlet. The maximum increment of the shockwave displacement, which is due to enlarging the angle of the blade end, is about 47 %. For this case, the pressure drop share of the SG is nearly half of the total pressure drop, while the residence time of particles is prolonged by about 51 %. As a general finding, increasing the swirl intensity provides a longer residence time to separate adequately the liquid from the gas. However, a higher energy loss is not desirable for the high-pressure process at the downstream of the 3S separator.

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Condensation characteristics of natural gas in the supersonic liquefaction process

Cited by 108 publications

References 31 publications

A new liquefaction method for natural gas by utilizing cold energy and separating power of swirl nozzle

A new liquefaction method for natural gas by utilizing cold energy and separating power of swirl nozzle

Flow Characteristics of Wet Natural Gas in Different Throttling Devices

Effect of the Geometry of a Swirl Generator on Energy Loss and Shockwave Position in Arina Nozzle

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