Exergy analysis and optimization of a biomass gasification, solid oxide fuel cell and micro gas turbine hybrid system
A hybrid plant producing combined heat and power (CHP) from biomass by use of a two-stage gasification concept, solid oxide fuel cells (SOFC) and a micro gas turbine was considered for optimization. The hybrid plant represents a sustainable and efficient alternative to conventional decentralized CHP plants. A clean product gas was produced by the demonstrated two-stage gasifier, thus only simple gas conditioning was necessary prior to the SOFC stack. The plant was investigated by thermodynamic modeling combining zero-dimensional component models into complete system-level models. Energy and exergy analyses were applied. Focus in this optimization study was heat management, and the optimization efforts resulted in a substantial gain of approximately 6% in the electrical efficiency of the plant. The optimized hybrid plant produced approximately 290 kWe at an electrical efficiency of 58.2% based on lower heating value (LHV).
Year of publication: |
2011
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Authors: | Bang-Møller, C. ; Rokni, M. ; Elmegaard, B. |
Published in: |
Energy. - Elsevier, ISSN 0360-5442. - Vol. 36.2011, 8, p. 4740-4752
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Publisher: |
Elsevier |
Subject: | Exergy | Optimization | Combined heat and power | Biomass gasification | Solid oxide fuel cells | Micro gas turbine |
Saved in:
Online Resource