Nonisothermal
Transient Flow in Natural Gas Pipeline

Abbaspour, Mohammad; Chapman, Kirby S.

doi:10.1115/1.2840046

Cited by 82 publications

(49 citation statements)

References 9 publications

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“…However, the above proposed forms of conservation equations in this paper as well as the way of their derivation were different from those proposed by [6] and [7].…”

Section: Pipelinementioning

confidence: 80%

“…The derivation of the above equations and the equations proposed in [6] and [7] started with the same governing equations and the same idea of using gas mass flow rate instead of gas velocity. However, the above proposed forms of conservation equations in this paper as well as the way of their derivation were different from those proposed by [6] and [7].…”

Section: Pipelinementioning

confidence: 99%

“…References [6] and [7] proposed new forms of governing equations for compressible gas flow in which mass flow rate was substituted for flow velocity. …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Technical Assessment of Isothermal and Non-Isothermal Modelings of Natural Gas Pipeline Operational Conditions

Sanaye

Mahmoudimehr

2012

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Évaluation technique de modélisations isothermes et non isothermes de conditions opérationnelles de conduites de gaz naturel -Une modélisation d'équipement au sein d'un gazoduc a été réalisée en dérivant une nouvelle forme d'ensemble d'équations de conservation pour un écoulement compressible. Une section du troisième réseau de distribution de gaz iranien (Nourabad-PatavehDorahan, N-P-D) a été ensuite étudiée selon des approches de modélisation isotherme (IT) et non isotherme (NIT) en prenant en compte les effets de la température du sol. Dans la première partie, le fonctionnement en régime stationnaire du gazoduc N-P-D, comprenant une station de compresseurs à Pataveh, a été étudié. Pour les valeurs connues de débit massique de gaz naturel et de pression de gaz d'entrée/sortie aux points Nourabad/Dorahan, les modélisations IT et NIT ont présenté respectivement des écarts maximaux en pourcentages d'environ 33,7 %, 16,6 % et 23 % en ce qui concerne la tête des compresseurs, la vitesse de rotation des compresseurs et les taux de consommation de carburant. Dans la deuxième partie, le fonctionnement instable du gazoduc N-P-D, dû à l'arrêt d'un compresseur à la station de compresseurs de Pataveh (PCS: Pataveh Compressor Station), a été étudié. Les résultats ont confirmé qu'à des températures de sol faibles (0 et 20°C), les compresseurs restants pouvaient compenser la perte d'un compresseur. Toutefois, à des températures de sol supérieures (40 et 50°C), les compresseurs devaient tourner plus vite que la vitesse maximale acceptable pour parvenir à délivrer un certain débit massique sans réduction de la pression de gazoduc requise. Dans tous les cas étudiés ci-dessus, le temps de calcul de la modélisation non isotherme a été approximativement trois fois plus long que celui de la modélisation isotherme. Abstract -Technical Assessment of Isothermal and Non-Isothermal Modelings of Natural Gas Pipeline Operational Conditions -Modeling of equipment in a gas pipeline was performed here by deriving a new form of conservation equation set for compressible flow. Then a section of the third Iranian gas transmission pipeline (Nourabad-Pataveh-Dorahan, N-P-D) was investigated by isothermal (IT) and non-isothermal (NIT) modeling approaches taking into

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“…However, the above proposed forms of conservation equations in this paper as well as the way of their derivation were different from those proposed by [6] and [7].…”

Section: Pipelinementioning

confidence: 80%

Section: Pipelinementioning

confidence: 99%

See 1 more Smart Citation

Technical Assessment of Isothermal and Non-Isothermal Modelings of Natural Gas Pipeline Operational Conditions

Sanaye

Mahmoudimehr

2012

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…At pressures above 3.5 MPa, the ratio of the pressure drop due to kinetic energy change to the total pressure drop in the pipeline was below 0.5% for all studied flow conditions (gas velocities). It is worth mentioning that under transient conditions the importance of the convective term in momentum equation is significant, as demonstrated by Abbaspour and Chapman (2008). The comparison shows that to the contrary of steady-state modeling, there exist significant difference in the flow distribution between solution with the convective term and without the convective term, and this difference increases when the mass flow rate increases in pipe.…”

Section: Introductionmentioning

confidence: 94%

Comparative assesment of steady-state pipeline gas flow models / Analiza porównawcza modeli przepływu gazu w rurociągu w stanach ustalonych

Chaczykowski¹,

Osiadacz²

2012

Archives of Mining Sciences

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One-dimensional, non-isothermal flow of gas in a straight pipe has been considered to predict pressure and temperature profiles along the horizontal pipeline under steady-state conditions. Selected analytical models for the simplified calculation of these profiles are evaluated on the basis of the numerical solution of the accurate model, which incorporates the convective term in the momentum equation and the kinetic energy term in the energy equation, while treating the enthalpy as a function of pressure and temperature. For closure of the system of the conservation equations, the GERG 2004 equation of state was chosen. In order to present the discrepancies introduced by the models, the results of the numerical and analytical solutions are compared with the field data. The results show that in the case of the high pressure gas transmission system, the effects of the convective term in the momentum equation and the kinetic energy term in the energy equation are negligible for pipeline pressure and temperature calculation accuracies. It also indicates that real gas effects play an important role in the temperature distribution along the pipeline and cannot be neglected from the calculation when approximate analytical equations are used.Keywords: pipeline gas flow, steady-state flow model, convective term, kinetic energy term, design flow equation, GERG 2004 application W artykule analizowano jednowymiarowy, nieizotermiczny przepływ gazu w stanie ustalonym w celu określenia zmian ciśnienia i temperatury w poziomym gazociągu. Wyniki uproszczonych obliczeń za pomocą wybranych modeli analitycznych zostały porównane z wynikami obliczeń uzyskanych za pomocą numerycznego całkowania modelu dokładnego, zawierającego człon konwekcyjny w równaniu pędu oraz człon energii kinetycznej w równaniu energii, jednocześnie przyjmując entalpię jako funkcję ciśnienia i temperatury. W celu zamknięcia układu równań zachowania zastosowano równanie stanu zgodnie z metodą GERG 2004. Dla przedstawienia niedokładności związanych z zastosowaniem różnych modeli, przeprowadzono weryfikację wyników na zbiorze danych rzeczywistych. Wyniki pokazują, że w przypadku systemów przesyłowych wysokiego ciśnienia, wpływ członu konwekcyjnego w równaniu pędu oraz członu energii kinetycznej w równaniu energii jest pomijalny z punktu widzenia dokładności

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“…Recently, nonisothermal transient flow of gas in natural gas pipeline was analysed by Abbaspour and Chapman [11]. The compressibility factor as a function of pressure and temperature and the steady-state heat flow between the gas in the pipe and the surroundings was assumed.…”

Section: Introductionmentioning

confidence: 99%

Transient flow in natural gas pipeline – The effect of pipeline thermal model

Chaczykowski

2010

Applied Mathematical Modelling

127

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a b s t r a c tOne-dimensional, nonisothermal gas flow model was solved to simulate the slow and fast fluid transients, such as those typically found in high-pressure gas transmission pipelines. The results of the simulation were used to understand the effect of different pipeline thermal models on the flow rate, pressure and temperature in the pipeline. It was found that simplified flow model with steady-state heat transfer term overestimates the amplitude of the temperature fluctuations in the pipeline. This result indicated that unsteady heat transfer model with the effect of heat accumulation in the surroundings of the pipeline should be used to calculate the gas parameters at locations of interest within high-pressure gas transmission pipelines.

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Nonisothermal Transient Flow in Natural Gas Pipeline

Cited by 82 publications

References 9 publications

Technical Assessment of Isothermal and Non-Isothermal Modelings of Natural Gas Pipeline Operational Conditions

Technical Assessment of Isothermal and Non-Isothermal Modelings of Natural Gas Pipeline Operational Conditions

Comparative assesment of steady-state pipeline gas flow models / Analiza porównawcza modeli przepływu gazu w rurociągu w stanach ustalonych

Transient flow in natural gas pipeline – The effect of pipeline thermal model

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