Abstract
In this study, a biomass based power generation system is proposed. This system includes a BIG (BIG) system to produce syngas, a proton exchange membrane (PEM) type fuel cell (FC), a gas turbine (GT), and an organic Rankine cycle (ORC). In order to evaluate the system function, first a parametric study is conducted and the effect of the design variables on the production power, exergy efficiency, and the total cost rate (TCR) of the system is investigated. Design variables include biomass moisture content, gasification temperature, compressor pressure ratio, air heat exchanger temperature difference, pressure of FC, current density of FC, LP Stage PPTD, and HP stage pressure. It is observed that the determining factors in the TCR of the system are more affected by the cost of the gasifier and PEM FC system. It is also observed that the ORC plays a greater role in recovering wasted heat and generating power compared to GT. Finally, it is observed that in optimal operating conditions, the exergy efficiency of the system are 33.19% and TCR is 693 $/h, respectively.
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