Thermodynamic simulation and economic modeling and optimization ‎of a multi generation system partially fed with synthetic gas from ‎gasification plant

This paper presents thermodynamic simulation, economic modeling and annual profit optimization of a multi generation system which produces both power and fresh water. The fuel of the combined system is natural gas plus synthesis gas which is produced in biomass gasification reactor. In order to evaluate thermodynamic performance of the biomass gasification reactor, visual simulation software was developed in C# programming language. The multi generation system is analyzed both with inlet air cooling and without inlet air cooling. The final results show that the total cost of produced power is 0.0286 $/kWh and total cost of produced water is 0.7408286 $/m³. Also the total annual profit which comes from selling power and water to the market is 35.103 M$ and the CHP efficiency is 67.08. Optimization of the configuration is carried out once the simulation phase is finished. The optimization results in 10.5% increase in total annual profit and 6.6% increase in CHP efficiency.