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Farzaneh-Gord M.,Shahrood University of Technology | Izadi S.,Shahrood University of Technology | Deymi-Dashtebayaz M.,Hakim Sabzevari University | Pishbin S.I.,Khayym University of Mashhad | Sheikhani H.,Industrial Advisor of Khorasanrazavi Gas Company
Journal of Natural Gas Science and Engineering | Year: 2015

In the supply pipelines, the natural gas pressure is about 1.7MPa (approximately 250Psi) and before entering distribution pipelines, this pressure should be reduced to a lower level of 0.4MPa (approximately 60Psi). This pressure reduction is performed in Town Border Stations (TBSs) in which the sizeable amount of pressure energy is wasted by employing throttling valves. One way to recover pressure energy during pressure reduction process is to employ an expansion machine such as the reciprocating expansion engines. The purpose of this study is thermodynamic simulation of one-sided medium pressure reciprocating expansion engine. The simulation is based on energy and mass conservation laws and the AGA8 equation of state. The results show that, with using expansion engine in TBS stations the efficiency of pressure energy recovery is about 91%. Also, with the suction of 18g gas per cycle, the engine generates 46.2kW power. The results also show that the engine could generate highest power at specific suction port to bore diameter. © 2015 Elsevier B.V.. Source

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