Abstract
Abstract This study presents a new analytical method to design gas pipelines. The new method is based on a real gas equation of state developed by The European Gas Research Group (GERG). This equation of state is very accurate in the pressure and temperature ranges that gas pipelines are operated at. The form of the GERG equation of state is such that an analytical solution to compressible gas flow in an arbitrarily inclined flow string can be obtained. The new analytical method considers the effect of kinetic energy, variable temperature distribution along the flow string, changes in flow string inclination, and variable flow string size, all of which are not considered in available methods in the literature. This method can be applied to both gas pipelines and wells. The new method is verified by comparing model-calculated and field-measured pressure drops in gas pipelines and gas wells. Twenty-seven data set for pipelines are used in the comparison. The average difference between calculated and measured pressure losses is 3 psi for pipelines. The methodology used to develop the new method can also be used to solve other gas flow problems.
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