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  4. A High-Temperature, High-Speed, Oil-Free Syngas Compressor for Small-Scale Combined Heat and Power
 
conference paper

A High-Temperature, High-Speed, Oil-Free Syngas Compressor for Small-Scale Combined Heat and Power

He, Victoria  
•
Van Herle, Jan  
•
Schiffmann, Jürg Alexander  
June 28, 2024
Proceedings of ASME Turbo Expo 2024: Turbomachinery Technical Conference and Exposition (GT2024)
ASME Turbo Expo 2024: Turbomachinery Technical Conference and Exposition

For low-emission, small-scale combined heat and power generation, integrating a biomass gasifier with a downstream solid oxide fuel cell system is very promising due to their similar operating conditions in terms of temperatures and pressures. This match avoids intermediate high-temperature heat exchangers and improves system efficiency. However, to couple both systems, a high-temperature and oil-free compressor is required to compress and push the low-density, high-temperature bio-syngas from the gasifier to the solid oxide fuel cell stack. The design and development of this high-temperature, high-speed, and gas-bearing supported compressor is presented in this work. An iterative process involving preliminary design, meanline analysis using commercial tools and in-house models is used for the design, which is then numerically analyzed using computational fluid dynamics. The goal is to achieve a design with a wide operating range and high robustness that withstands extreme working conditions. The 727 W machine is designed to run up to 210 krpm to compress 18.23kgh−1 of syngas at 350°C and 0.81bar. The centrifugal compressor has a tip diameter of 38 mm and consists of 9 backswept main and splitter blades. The impeller is made of Ti6Al4V and coated to prevent hydrogen embrittlement from the hot and highly reactive bio-syngas. The results obtained from the established models suggest a good concordance with the results from numerical analyses, despite the high temperatures and small scale of this design.

  • Details
  • Metrics
Type
conference paper
DOI
10.1115/GT2024-125975
Author(s)
He, Victoria  

EPFL

Van Herle, Jan  

EPFL

Schiffmann, Jürg Alexander  

EPFL

Date Issued

2024-06-28

Publisher

American Society of Mechanical Engineers

Published in
Proceedings of ASME Turbo Expo 2024: Turbomachinery Technical Conference and Exposition (GT2024)
ISBN of the book

978-0-7918-8801-8

Book part title

Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications; Steam Turbine

Book part number

Volume 9

Series title/Series vol.

Manufacturing Materials and Metallurgy, Microturbines, Turbochargers, and Small Turbomachines, Oil & Gas Applications, Steam Turbine; 9

Subjects

small-scale turbomachinery

•

thermally-driven

•

syngas compressor

•

high-speed

•

high-temperature

•

SOFC

•

multi-disciplinary

•

CHP

URL
Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LAMD  
Event nameEvent acronymEvent placeEvent date
ASME Turbo Expo 2024: Turbomachinery Technical Conference and Exposition

TurboExpo 2024

London, UK

2024-06-24 - 2024-06-28

FunderFunding(s)Grant NumberGrant URL

European Commission

Horizon 2020 Research and Innovation Program

815284

RelationRelated workURL/DOI

Continues

A High-Temperature, High-Speed, Oil-Free Syngas Compressor for Small-Scale Combined Heat and Power

https://infoscience.epfl.ch/handle/20.500.14299/240876.3
Available on Infoscience
August 30, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/240921
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