Abstract
AbstractIn natural gas transmission network analysis, the general gas pipeline equation and its common design variations (Weymouth, Panhandle A, Panhandle B, IGT/AGA) typically assume an average compressibility factor Zav across pipeline sections. In this work, it is shown that errors in the selected Zav value result in design specification errors biased toward pipe sections further downstream of the network. These errors are especially pronounced in large pressure change systems and can have significant cost implications given standardized pipeline sizing. Consequently, a new natural gas transmission model is developed towards improved natural gas pipeline network analysis. The new model is based on quartic characterization of the P/Z integral term in pseudoreduced form. The pseudoreduced framework serves to preserve the simplicity level of prevailing design equations while improving the accuracy in the handling of the P/Z integral computation by up to 100% with improved design specifications and cost-sa...
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