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Micro Turbo-Fuel-Cell-Technology: Hybrid compact turbo machinery technology and thermodynamic aspects regarding design parameters of a high efficient MGT-SOFC-system

  • The improvement of decentralised energy supply systems has received an important role in the recent years. One option therefore is the combination of SOFC with a recuperated MGT. Here, a new strategy for selecting the system parameters, such as the operating temperature of the SOFC, the turbine inlet temperature and the pressure ratio of the hybrid system, is presented. By introducing the heat ratio between the heat required to increase the process gas to the SOFC operating temperature and the heat required to raise the SOCF exhaust gas to the TIT, it was found that high efficiency (approx. 68%) is realisable in a compact hybrid system today. Analysis also shows that the HEX-technology is needed to improve the system effectiveness. Also, high recirculation rates with lower TIT can be considered as the future development direction. In addition, a sample configuration of an oil-free MGT rotor unit with high speed foil bearings is presented.

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Author: Peter Berg, Roland Dückershoff, Mario Lehmann, Nontavut Prechavut
URL:http://www.euroturbo.eu/paper/ETC2017-266.pdf
Title of the source (English):Proceedings of 12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics, ETC12, April 3 - 7, 2017, Stockholm, Sweden
Document Type:Conference Proceeding
Language:English
Year of publication:2017
Tag:CHP; Foil bearings; SOFC; Thermodynamic; Turbo machinery
Article number:ETC2017 - 266
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Verbrennungskraftmaschinen und Flugantriebe
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