1 Department of Mechanical Engineering, Technical University of Denmark2 Thermal Energy, Department of Mechanical Engineering, Technical University of Denmark
Thermodynamic and thermoeconomic investigation of a small scale Integrated Gasification Solid Oxide Fuel Cell (SOFC) and Stirling engine for combined heat and power (CHP) with a net electric capacity of 120kW have been performed. Woodchips are used as gasification feedstock to produce syngas which is then utilized for feeding the anode side of SOFC stacks. Thermal efficiency of 0.424 LHV for the plant is found to use 89.4kg/h of feedstock for producing 120kW of electricity. Thermoeconomic analysis shows that the production price of electricity is 0.1204$/kWh. Further, hot water is considered as a by-product and the cost of hot water was found to be 0.0214$/kWh. When compared to other renewable systems at similar scale, it shows that if both SOFC and Stirling engine technology emerges enter commercialization phase, then they can deliver electricity at a cost rate which is competitive with corresponding renewable systems at the same size and therefore.
Proceedings of the 8th Conference on Sustainable Development of Energy, Water and Environment Systems, 2013