Modelling and control of a gas blending station: A real industrial case study

The purpose of this study is to develop an automatic blending system of the gas coming from many sources in the Algerian desert. This system should ensure flexibility at the Algerian National Center of Dispatching GAS (CNDG) of Sonatrach in terms of the management of the qualities and quantities of the gases to be transported via the pipeline network (known as TRC). Furthermore, the proposed automatic blending system must satisfy the requirements of Sonatrach's clients. The modelling of the system is carried out by using Aspen HYSYS software where a model of the station is built according to the project technical specifications and tested in various realistic scenarios. Moreover, the simulation is based on conditions and parameters (mass flow rates, temperature and pressure readings, gas compositions, flow coefficients of the valves, etc.) obtained from the CNDG. Finally, by using real data, HYSYS simulation results demonstrate the effectiveness of the proposed control strategy.