Thermodynamics of pipeline gas flow

• Autorzy: Osiadacz A. , Chaczykowski M.
• Języki publikacji: EN

Abstrakty

EN

The form of mathematical models describing the transient flow of gas in pipes varies in practice with the assumptions made as regards the conditions of operation of the networks. Generally, the thermodynamics of one-dimensional transient flow of gas in pipes is described by an equation of energy. In much of the literature, the assumption of either an isothermal or an adiabatic process is adopted. Isothermal flow relates to slow fluctuations in demand and it is assumed that the gas in the pipe has sufficient time to reach thermal equilibrium with its constant-temperature surroundings. Similarly, when rapid transients are under consideration, it is assumed that the pressure changes occur instantaneously and heat conduction effects can be neglected. In such cases the thermodynamics of the gas flow can be considered as of an adiabatic process. For many dynamic gas applications the assumption of a process having a constant temperature or being adiabatic is not valid. In this case, the temperature of the gas is a function of distance and is calculated using a mathematical model, which includes energy equation. In the paper a comparison between the isothermal and two non-isothermal models of different accuracy is presented. Practical example has been used to emphasise differences between models.

Słowa kluczowe

EN

gas flow; gas networks; mathematical modelling; simulation

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2001
• Tom: Vol. 22, nr 3-4
• Strony: 53--67
• Opis fizyczny: Bibliogr. 13 poz.,Rys., tab.,

Twórcy

autor

Osiadacz A.

autor

Chaczykowski M.

• Politechnika Warszawska

Bibliografia

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• [7] OSIADACZ A. J., CHACZYKOWSKI M.: Simulation of non-isothermal transient gas flow in a pipeline, Archives of Thermodynamics, Vol. 22(2001), 51-70.
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