Design and optimization of energy-efficient single mixed refrigerant LNG liquefaction process

The optimal design of single mixed refrigerant (SMR) natural gas liquefaction process is decisive for upgrading the liquefied (LNG) value chain and can be achieved using simulators derivative-free optimization techniques in simulation–optimization frameworks. work consumption reduced by modifying flowsheet manipulating refrigeration cycle thermodynamic conditions composition. goal this paper energy-efficient SMR LNG production approach, Aspen HYSYS® MATLAB®, that considers more decision variables to optimized with a Nelder–Mead simplex algorithm small modifications, such as hydraulic turbines flash separators between compression stages. present approach resulted network duty 750.2 kJ per kg gas, which considerably smaller than those reported literature.