Abstract:
This study focuses on the hybrid power generation system of Solid Oxide Fuel Cells (SOFC), investigating the impact of integrating different types of external combustion engines (Gas turbine, Organic Rankine cycle, and Stirling engine) on system thermoelectric efficiency after selecting an appropriate reformer. By analyzing the thermoelectric efficiency differences of SOFC systems combined with three types of external combustion engines under various fuel utilization rates, the study evaluates the irreversible energy losses in each component based on the principles of entropy generation and exergy analysis.
Numerical simulations of energy and mass transfer reveal that, both qualitatively and quantitatively, the SOFC-SE configuration achieves the highest system thermoelectric efficiency. Entropy generation and exergy calculations indicate that the SOFC-ORC hybrid system exhibits the highest entropy generation, resulting in comparatively lower efficiency. In contrast, the SOFC-SE hybrid system demonstrates superior exergy efficiency. Factors such as temperature differences at component inlets and outlets, chemical reactions, and external heat transfer significantly influence entropy generation.
|