Abstract
This paper brought the performance prediction of a Solid Oxide Fuel Cell (SOFC) - Micro Gas Turbine (MGT) hybrid system using biogas fuel. Assuming biochemical process, it is noted that the biogas mainly consists of methane (CH_4) and carbon dioxide (CO_2). In the present study, the concentration of CH_4 was varied from 100% to 20%, where the one of CO_2 from 0% to 80%, in order to analyse the effect of CH_4 concentration on the electrical power generation of hybrid system. It was found that the efficiency of the hybrid system degraded with decreasing CH_4 concentration. Main reason of the efficiency drop was voltage drop, while the CH_4 concentration was diluted from 100% to 20%. Consequently, getting lower concentration of CH_4 degrades the electrical power generation in SOFC. Therefore it led the performance degradation of the hybrid system.
