The preliminary CFD design of a compressor and combustor system towards a 100 kw hydrogen fuelled micro gas turbine

Cedric Devriese, W.J. Pennings, H.A. de Reuver, Rob Bastiaans, Ward De Paepe

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Abstract

Within the context of an ever-increasing share of wind, solar and emerging tidal power, the need to store energy, not only on the short term, but also in the medium to long-term to balance out the power grid will become more important in the near future. One of the most promising routes for this mid- to long term storage, is to produce hydrogen through electrolysis using excess electricity and store it. Instead of using this hydrogen then to generate electricity in a conventional, large, power plant, a more efficient route is to use it in a Decentralised Energy System (DES) using micro Gas Turbines (mGTs). Although the mGT presents itself as a promising option to convert pure hydrogen into electricity in this DES framework, several challenges, linked to the necessary increase of Turbine Inlet Temperature (TIT) for efficiency increase to make the unit compatible and the use of pure hydrogen in the combustor, still need to be overcome. In this paper we present the first steps towards a fully hydrogen fuelled mGT. Firstly, a full thermodynamic cycle analysis was performed to determine the optimal operating parameters, such as compressor pressure ratio and mass flow rate, air-to-fuel ratio and TIT. Secondly, a full CFD design and optimisation of the compressor and the combustion chamber was performed (steady and transient RANS and LES). CFD simulations of the compressor and combustion chamber matched the 1D performance calculations and also reached the desired performance goals. This CFD supported validation of the component performance shows that the design of a pure hydrogen combustion chamber for mGT applications is possible.
Original languageEnglish
Title of host publicationProceedings of ASME Turbo Expo 2019
Subtitle of host publicationTurbomachinery Technical Conference and Exposition GT2019, June 17-21, 2019, Phoenix, Arizona, USA
PublisherAmerican Society of Mechanical Engineers
Number of pages10
VolumeVolume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines
ISBN (Electronic)9780791858714
DOIs
Publication statusPublished - 17 Jun 2019
EventASME Turbo Expo 2019: Turbomachinery Technical Conference & Exposition - Phoenix Convention Center, Phoenix, United States
Duration: 17 Jun 201921 Jun 2019

Conference

ConferenceASME Turbo Expo 2019: Turbomachinery Technical Conference & Exposition
CountryUnited States
CityPhoenix
Period17/06/1921/06/19

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Devriese, C., Pennings, W. J., de Reuver, H. A., Bastiaans, R., & De Paepe, W. (2019). The preliminary CFD design of a compressor and combustor system towards a 100 kw hydrogen fuelled micro gas turbine. In Proceedings of ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition GT2019, June 17-21, 2019, Phoenix, Arizona, USA (Vol. Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines). [GT2019:91342] American Society of Mechanical Engineers. https://doi.org/10.1115/GT2019-91342