The process simulation is performed for ethylene glycol plant by using the PROCESS simulationprogramme, and the unit operation model and the thermodynamic method are determined.
Conjugate gradient method were choosed to solve the large sparse matrix equations induced by the FEM and computer language FORTRAN was used to programme the numerical simulation system software.
选择共轭梯度法解决由有限元法形成的大型稀疏矩阵方程，应用FORTRAN语言编制了数值模拟系统软件。
3
By the simulation for the transient responses of the upper shafting in the main drive system of 1150 rolling mill, the computer programme is proved to be effective.