Thermodynamic Analysis of a Woodchips Gasification Integrated with Solid Oxide Fuel Cell and Stirling Engine

Masoud Rokni

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

Abstract

Integrated gasification Solid Oxide Fuel Cell (SOFC) and Stirling engine for combined heat and power application is analysed. The target for electricity production is 120 kW. Woodchips are used as gasification feedstock to produce syngas which is utilized for feeding the SOFC stacks for electricity production. Unreacted hydrocarbons after SOFC are burned in a catalytic burner and the hot off-gases from the burner are recovered in a Stirling engine for electricity and heat production. The domestic hot water is used as heat sink for the Stirling engine. A complete balance of plant is designed and suggested. Thermodynamic analysis shows that a thermal efficiency of 42.4% based on LHV (lower heating value) can be achieved. Different parameter studies are performed to analysis system behaviour under different conditions. The analysis show that increasing fuel mass flow from the design point results in reducing plant efficiency, whereas power production increases to a maxima before decreasing. Further, not shown here, the optimum utilization factor of SOFC is found to be 65% with suggested input parameters.
Original languageEnglish
Title of host publicationProceedings of SEEP 2013
PublisherUniversity of Maribor
Publication date2013
Pages432-438
ISBN (Print)978-961-248-379-1
Publication statusPublished - 2013
Event6th International Conference of Sustainable Energy and Environmental Protection (SEEP) - University of Maribor, Maribor, Slovenia
Duration: 20 Aug 201323 Aug 2013
Conference number: 6

Conference

Conference6th International Conference of Sustainable Energy and Environmental Protection (SEEP)
Number6
LocationUniversity of Maribor
CountrySlovenia
CityMaribor
Period20/08/201323/08/2013

Cite this

Rokni, M. (2013). Thermodynamic Analysis of a Woodchips Gasification Integrated with Solid Oxide Fuel Cell and Stirling Engine. In Proceedings of SEEP 2013 (pp. 432-438). University of Maribor.