Transient Modeling of Natural Gas Transmission Systems

September 2016, Vol. 243, No. 9

By Rainer Kurz and Robert C. White, Solar Turbines Inc., San Diego, CA, Klaus Brun, Southwest Research Institute, San Antonio, TX, and Saeid Mokhatab, Gas Processing Consultant, Dartmouth, NS, Canada

Transient flow regularly occurs in the gas pipeline during normal operation due to variations in demand, inlet and outlet flow changes, and compressor start and stop. Transients can also occur in natural gas pipelines during filling and line pressurization, emergency shutdown, gas blowdown, line depressurization processes, and pipe leaks or rupture (Mokhatab et al., 2015). There are several reasons for applying transient analysis during the design phase of gas transmission pipelines. First, the designed system must be able to operate under different scenarios. Otherwise, the transmission company could face penalties for not delivering the contracted…

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