基于面向方程闪蒸模型的管道单元模拟OA

Pipeline systems are vital in chemical and energy industries,where accurate steady-state simulation is crucial for design.This work presents an equation-oriented(EO)approach mass,momentum,and energy equations are discretized using the finite volume method,coupled with an improved flash evaporation model based on pseudo-equilibrium temperature and complementary constraints,to construct a fully coupled,differentiable tridiagonal Jacobian matrix,which is then solved using the interior-point method.Validated on three cases—LNG transport,C2/C3 two-phase flow,and superheated steam—the model achieves pressure and temperature drop predictions within 5%relative error of Aspen Plus and PipeSim,with 19%—21%higher computational efficiency than sequential modular methods.The method offers high accuracy,robustness,and speed,enabling reliable real-time simulation and optimization of complex pipeline networks.