May 2008

Piping/Fluid Flow

The effect of kinetic energy change on flow in gas pipelines

The significance of the acceleration term in pressure drop calculations is investigated

Demneh, F. A., Department of Chemical Engineering, Falculty of Engineering, University of Tehran; Mesbah, A., Process and Energy Laboratory, Delft Univeristy of Technology

Engineers often seek simple design tools that can be utilized for quick and reliable calculations. This approach has led to emergence of many simplified or integrated forms of pressure drop equations that are widely used for gas pipeline design. In most of such analytical expressions the effect of kinetic energy on the total pressure drop is, however, neglected and may result in substantial errors. In this article, the significance of the acceleration term in pressure drop calculations of gas pipelines is investigated. A simple procedure is introduced that provides an estimate of the pressure drop contribution due to the kinetic energy change to the total pressure drop along the pipeline at

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