Investigation of hydrate formation in natural gas flow through underground transmission pipeline

Farzaneh–Gord, Mahmood; Rahbari, Hamid Reza; Bajelan, Mahdi; Pilehvari, Lila

doi:10.1016/j.jngse.2013.09.001

Cited by 32 publications

(13 citation statements)

References 13 publications

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“…Several main model assumptions are listed below: The transmission parameters in the gas storage station are considered to be stable during CO 2 transmission. The heat transfer rate from CO 2 to the outer wall of the pipeline is assumed to be stable, while the heat transfer in the formation is considered to be transient The burial depth along the pipeline is considered to be the same, and the initial temperature of the formation is only related to the depth CO 2 is considered to be a non‐ideal gas and maintained as a gas phase during transportation.…”

Section: Model Descriptionmentioning

confidence: 99%

“…The burial depth along the pipeline is considered to be the same, and the initial temperature of the formation is only related to the depth …”

Section: Model Descriptionmentioning

confidence: 99%

“…The burial depth along the pipeline is considered to be the same, and the initial temperature of the formation is only related to the depth. 46 4. CO 2 is considered to be a non-ideal gas and maintained as a gas phase during transportation.…”

Section: Basic Assumptionsmentioning

confidence: 99%

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A numerical study on the non‐isothermal flow characteristics and hydrate risk of CO₂ in buried transmission pipelines under the gas‐phase transportation mode

Liu

Sun

et al. 2019

Greenhouse Gases

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With the development and progress of carbon dioxide (CO2) capture and storage technology, the study of the flow assurance of CO2 in transmission pipelines needs to be further deepened. In this study, aiming at the gas‐phase transportation mode of CO2, first, a new prediction model of temperature, pressure as well as hydrate formation risk in buried CO2 transmission pipelines is established. Second, the model solving methods of differential discretization and piecewise iteration are introduced in detail. Third, model validation and sensitivity analysis of typical transmission parameters are performed. The results show that: (a) there is good agreement between the model prediction results and software simulation results. (b) The subcooling and the length of the hydrate formation region increase with the increase in the transmission rate. Appropriate increase in the CO2 transmission rate can reduce the risk of hydrate formation in CO2 transmission pipelines. (c) The subcooling and the length of the hydrate formation region decrease as the transmission temperature increases. In order to prevent hydrate risk in the CO2 transmission process, low transmission temperatures should be avoided. (d) The subcooling and the length of the hydrate‐formation area increase first and then decrease as the transmission pressure increases. Appropriate increase in CO2 transmission pressure is conducive to avoiding hydrate formation risk. This study provides basic theoretical guidance for optimizing transmission parameters and risk assessment of hydrate formation in CO2 transmission pipelines. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Model Descriptionmentioning

confidence: 99%

“…The burial depth along the pipeline is considered to be the same, and the initial temperature of the formation is only related to the depth …”

Section: Model Descriptionmentioning

confidence: 99%

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A numerical study on the non‐isothermal flow characteristics and hydrate risk of CO₂ in buried transmission pipelines under the gas‐phase transportation mode

Liu

Sun

et al. 2019

Greenhouse Gases

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“…Also Ndiaye and Bernier [5] did a dynamic model of a hermetic reciprocating compressor in on-off cycling operation. Also Farzaneh-Gord et al [6] optimized design parameters of reciprocating air compressor thermodynamically. They developed a mathematical model according to the mass conservation, first law, and ideal gas assumption to study the performance of reciprocating compressors.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Vertical Vibration Mechanism of Reciprocating Compressors considering Flexibility of Piston Rod and Crosshead Subsidence

Cheng

Liu

Xiao

et al. 2019

Mathematical Problems in Engineering

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This paper is targeted on the vertical vibration of the crosshead in a reciprocating compressor, taking into consideration the crosshead subsidence. The traditional model of the compressor is usually a crank-slider mechanism system without considering the abrasion loss for any parts, thus neglecting the influence of the piston rod flexibility. A rigid-flexible model of slider-crank is described theoretically, in which the crank, connecting rod, and crosshead are treated as rigid bodies, while the piston rod connected to the crosshead is considered as a flexible body. Lagrange equation was adopted to establish the kinetic equation of the system, considering the mass of the crank, the linkage, and the crosshead. After modeling the mechanism, the simulation shows that the dynamic response of the crosshead will be greatly influenced if crosshead subsidence is considered. Additionally, the influence of the crosshead subsidence is also investigated, and some new phenomena arise especially the vertical vibration of crosshead.

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“…Many researchers working on the natural gas engines demonstrated that natural gas composition significantly affects engine performance and emissions. It was also reported that the heating value (HV), thermal efficiency, and concentration of un-burnt hydrocarbon (UHC) and other emission particles would highly depend on the source of supply of natural gas as the main fuel [34,35]. under given inlet conditions.…”

Section: Fuel Composition Effectsmentioning

confidence: 99%

Investigation of Combustion Phenomena in a Single-Cylinder Spark-Ignited Natural Gas Engine with Optical Access

Padmanaban¹

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More demanding efficiency and emissions standards for internal combustion (IC) engines require novel combustion strategies, alternative fuels, and improved after-treatment systems. However, their development depends on improved understanding of in-cylinder processes. For example, the lower efficiency of conventional spark-ignited (SI) natural-gas (NG) engines reduces their utilization in the transportation sector. Single-cylinder optical-access research engines allow the use of non-intrusive visualization techniques that study in-cylinder flow, fuel-oxidizer mixing, and combustion and emissions phenomena under conditions representative of production engines. These visualization techniques can provide qualitative and quantitative answers to fundamental combustion-phenomena questions such as the effects of engine design, operating conditions, fuel composition, fuel delivery strategy, and ignition techniques. The thesis is divided in two main parts. The first part focuses on the setup of a single-cylinder research engine with optical access including the design of its control system and the acquisition of in-cylinder pressure data and high-speed combustion images. The second part focuses on measurements of the turbulent flame speed using the high-speed combustion images. Crank-angle-resolved images of methane combustion were taken with a high-speed CMOS camera at a rate of 15,000 Hz. The optical engine was operated in a skip-firing mode (one fired cycle followed by 5 motored cycles) at 900 RPM and a load of 5.93 bar IMEP. The images show that flow turbulence and flame stretch resulted in flame velocities several order of magnitude higher compared to the laminar flame velocity. In addition, both in-cylinder pressure and optical data were used to determine the cycle-to cycle variability of the combustion phenomena. iii Dedication This thesis is dedicated to my beloved parents, Dr.Padmanaban, and Beena Padmanaban First and foremost, I would like to thank my research advisor Dr. Cosmin Dumitrescu for his support, knowledge and all the friendship he shared with me right from the beginning. Everything he taught me both, in academics and building me as a person will surely stay with me and help me progress in my future career. His perseverance in work have always strongly motivated me to put in a lot of efforts and set an example to my colleagues in the laboratory. I am very grateful to him for teaching me the difference between a scientific and an engineering work, helping me start transforming into a good researcher. On a lighter note, I am very thankful to him for having funded me three long semesters in my master's study. I would like to express my gratitude to Dan Carder for having initially hired me to the CAFEE, and help me settle down to work with optical engines research project. My heartfelt thanks are due to my committee member Dr. Arvind Thiruvengadam for having been a good friend and a wonderful source of inspiration. With his stature and knowledge, nobody I could think of to have been this modest, helpful and...

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Investigation of hydrate formation in natural gas flow through underground transmission pipeline

Cited by 32 publications

References 13 publications

A numerical study on the non‐isothermal flow characteristics and hydrate risk of CO₂ in buried transmission pipelines under the gas‐phase transportation mode

A numerical study on the non‐isothermal flow characteristics and hydrate risk of CO₂ in buried transmission pipelines under the gas‐phase transportation mode

Analysis of Vertical Vibration Mechanism of Reciprocating Compressors considering Flexibility of Piston Rod and Crosshead Subsidence

Investigation of Combustion Phenomena in a Single-Cylinder Spark-Ignited Natural Gas Engine with Optical Access

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Investigation of hydrate formation in natural gas flow through underground transmission pipeline

Cited by 32 publications

References 13 publications

A numerical study on the non‐isothermal flow characteristics and hydrate risk of CO2 in buried transmission pipelines under the gas‐phase transportation mode

A numerical study on the non‐isothermal flow characteristics and hydrate risk of CO2 in buried transmission pipelines under the gas‐phase transportation mode

Analysis of Vertical Vibration Mechanism of Reciprocating Compressors considering Flexibility of Piston Rod and Crosshead Subsidence

Investigation of Combustion Phenomena in a Single-Cylinder Spark-Ignited Natural Gas Engine with Optical Access

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A numerical study on the non‐isothermal flow characteristics and hydrate risk of CO₂ in buried transmission pipelines under the gas‐phase transportation mode

A numerical study on the non‐isothermal flow characteristics and hydrate risk of CO₂ in buried transmission pipelines under the gas‐phase transportation mode