Analysis of a micro-CHP system consisting of steam injected gas turbine fed by syngas and integrated with bottoming Organic Rankine Cycle

Integration of energy systems is an effective strategy to achieve higher efficiency and to reduce the emissions in power systems, which has been studied by many researchers for different applications and system configurations. Steam Injected micro Gas Turbine (SImGT) coupled to bottoming Organic Rankine Cycle (ORC) can be a way to achieve higher efficiency and to reduce the emissions in small-scale biomass power plants. In this study, a 1-dimensional model of a steam fluidized-bed gasifier has been coupled with a dynamic model of a SImGT and a zero-dimensional model of a bottoming ORC in order to investigate the performance of such system. A Heat Recovery Steam Generating (HRSG) is adopted in the design of the integrated system to produce steam for both the gasification process and the SImGT. Results of the simulation under steady-state condition show that the designed system can produce 114.6 kWel and 81.3 kWth with 33.6 % electric efficiency using 25 g/s steam injected to the combustion chamber.