Article


Article Code : 13971124177549

Article Title : Control Structure Design and Dynamic Simulation of Mixed Fluid Cascade Natural Gas Liquefaction Process

Journal Number : 5 Summer 2019

Visited : 76

Files : 2.15 MB


List of Authors

  Full Name Email Grade Degree Corresponding Author
1 Talieh Ramezani talieh_ramezani@ut.ac.ir Post Graduate Student PhD
2 Zahra Nargessi zahra_nargessi@ut.ac.ir Post Graduate Student PhD
3 Ali Palizdar paliz_529@alumni.ut.ac.ir Post Graduate Student PhD
4 Ali Vatani avatani@ut.ac.ir Professor PhD

Abstract

Mixed fluid cascade natural gas liquefaction process control system is designed and analyzed in this study. The specific energy consumption (SEC) of this process is 0.2647 kWh/kg LNG. After steady state simulation and sizing the process components, a control structure is designed to control the whole process. In addition, dynamic simulation is carried out and performance of the controllers is investigated. By dynamic simulation, specific energy consumption is reduced to 0.2574 kWh/kg LNG, which means the designed control structure can stably and accurately control the process. To validate the performance and stability of the control structure, changes in the flow rate and temperature of the feed gas are inflicted as a disturbance to the process.