The purpose of this research is to analyze influence of energy equation on gas pipeline transient simulation. The paper briefly presents current models for gas pipeline simulation, and analyzes their characteristics, applicable conditions, and solution methods. Calculation errors are analyzed by applying one model considering energy equation and the other neglecting to simulate a gas pipeline in service. The example results show the average relative error between the two models is lower than 1.32%, which indicates the neglect of energy equation can satisfy general gas pipeline design. However, the maximum relative error is 4.40%, especially the maximum absolute error of temperature is 12.14K, which indicates energy equation could not be neglected if some pipeline simulation condition needing higher accuracy. Finally, influence of energy equation on simulation result is evaluated and some conclusions are drawn.
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