TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Transient Phenomena Specific to Gas Pipelines Exploitation
(* Universitatea Petrol-Gaze din Ploieşti, Bd. Bucureşti, 39, Ploieşti e-mail: ctrifan@upg-ploiesti.ro ** E.ON Gaz România, Regiunea Est e-mail: dumitru.olteanu@eon-gaz-romania.ro *** E.ON Gaz Distribuţie, Centrul Operaţional Piatra Neamţ e-mail: remus.herda@eon-gaz-distributie.ro **** Transgaz Medias, Exploatarea Teritorială Bucureşti, Sectorul Ploieşti e-mail: tiberiu4eternity@zahoo.com)
Vol LX • No. 4/2008
Cornel Trifan*, Dumitru Olteanu**, Remus Herda***, Tiberiu Florin Trifan****
* Universitatea Petrol-Gaze din Ploieşti, Bd. Bucureşti, 39, Ploieşti
e-mail: ctrifan@upg-ploiesti.ro
** E.ON Gaz România, Regiunea Est
e-mail: dumitru.olteanu@eon-gaz-romania.ro
*** E.ON Gaz Distribuţie, Centrul Operaţional Piatra Neamţ
e-mail: remus.herda@eon-gaz-distributie.ro
**** Transgaz Medias, Exploatarea Teritorială Bucureşti, Sectorul Ploieşti
e-mail: tiberiu4eternity@zahoo.com

 Keywords   gas, pipelines, transient phenomena, exploatation

 Abstract
This paper presents the simulation of transient phenomena appearing in gas pipelines when the gas yields either at the pipeline inlet or outlet gets different values towards the prescribed ones due to exploitation, according to the primary normal stationary regimes. These new gas yields values disturb the stationary regime, transforming it in a transient one. The new regime has a transient character since it becomes stabile in time, returning to a stationary regime, according to the new hydrodynamic parameters: the pressure at the ends of pipeline and the flow. This paper is intended to determinate the duration of transient regime so it could be determined sooner by the operators of gas transportation and distribution systems.

 Rezumat
Lucrarea prezintă modelarea fenomenelor tranzitorii ce apar în conductele de gaze atunci când, datorită exploatării, debitele de gaze vehiculate, fie la intrare, fie la ieşire, capătă valori diferite de cele prescrise, corespunzătoare regimurilor staţionare iniţiale, normale. Aceste noi valori ale debitelor de gaze perturbă regimul staţionar de curgere, transformându-l în regim nestaţionar. Noul regim are caracter tranzitoriu deoarece, după o anumită perioadă de timp se stabilizează, revenind la un regim staţionar, corespunzător noilor parametri hidrodinamici, presiunile la capetele conductei şi debitul vehiculat. Scopul lucrării este determinarea duratei regimului tranzitoriu pentru a putea fi cunoscută din timp de operatorii din sistemele de transport şi distribuţie a gazelor naturale.



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