Details
| Original language | English |
|---|---|
| Pages (from-to) | 29518-29531 |
| Number of pages | 14 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 42 |
| Issue number | 49 |
| Early online date | 31 Oct 2017 |
| Publication status | Published - 7 Dec 2017 |
Abstract
Integration of a multifunctional fuel cell into civil aircraft as on-board power generating system is a promising opportunity to improve energy efficiency while reducing emissions. In this approach, a PEMFC would provide electrical energy during on-ground operations and emergency situations, while by-products water vapour and oxygen depleted air (ODA) would be used during flight for water generation and inerting (provision of non-inflammable atmosphere). This study presents a novel cathode exhaust gas dehumidification system based on an air cycle machine (compressor, heat exchanger, cyclone, turbine) which supplies liquid water and dry ODA for the aforementioned functions. First, feasibility of the multifunctional approach, quality of the generated water and necessary level of dehumidification are discussed. Next, real fluid property data and the system thermodynamic model are presented. Feasibility of the novel system is demonstrated with a parametric study on the effect of stoichiometry, compressor pressure ratio and turbine outlet pressure. Computed results show that: the target average O2 concentration of 10.5% (vol.) is maintained at stoichiometries below λO2≤1.8; for maximum humidity ratio xmax=0.002kgH2O/kgODA there is not risk of ice formation on condenser when compressor pressure ratio is above π ≥ 2.8. Finally, an estimation of added and potentially removed weight is given, also possible system configurations are derived.
Keywords
- Civil aviation, Dehumidification, Multifunctional fuel cell, Tank inerting, Water generation
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Energy(all)
- Fuel Technology
- Physics and Astronomy(all)
- Condensed Matter Physics
- Energy(all)
- Energy Engineering and Power Technology
Sustainable Development Goals
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In: International Journal of Hydrogen Energy, Vol. 42, No. 49, 07.12.2017, p. 29518-29531.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Multifunctional fuel cell system for civil aircraft
T2 - Study of the cathode exhaust gas dehumidification
AU - Cruz Champion, H.
AU - Kabelac, S.
N1 - Funding Information: This study is part of the research project ”FUel Cell and Hydrogen Systems (FUCHS)” and was supported by the German Federal Ministry of Economic Affairs and Energy (BMWi) under the research grant 20Y1105F . Special thanks to the Airbus Fuel Cell Team for their assistance understanding aircraft architecture and requirements. In particular, the authors gratefully acknowledge Dr. Lüdders (Airbus) for initiating and supporting the work on the presented exhaust gas dehumidification concept. Publisher Copyright: © 2017 Hydrogen Energy Publications LLC Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/12/7
Y1 - 2017/12/7
N2 - Integration of a multifunctional fuel cell into civil aircraft as on-board power generating system is a promising opportunity to improve energy efficiency while reducing emissions. In this approach, a PEMFC would provide electrical energy during on-ground operations and emergency situations, while by-products water vapour and oxygen depleted air (ODA) would be used during flight for water generation and inerting (provision of non-inflammable atmosphere). This study presents a novel cathode exhaust gas dehumidification system based on an air cycle machine (compressor, heat exchanger, cyclone, turbine) which supplies liquid water and dry ODA for the aforementioned functions. First, feasibility of the multifunctional approach, quality of the generated water and necessary level of dehumidification are discussed. Next, real fluid property data and the system thermodynamic model are presented. Feasibility of the novel system is demonstrated with a parametric study on the effect of stoichiometry, compressor pressure ratio and turbine outlet pressure. Computed results show that: the target average O2 concentration of 10.5% (vol.) is maintained at stoichiometries below λO2≤1.8; for maximum humidity ratio xmax=0.002kgH2O/kgODA there is not risk of ice formation on condenser when compressor pressure ratio is above π ≥ 2.8. Finally, an estimation of added and potentially removed weight is given, also possible system configurations are derived.
AB - Integration of a multifunctional fuel cell into civil aircraft as on-board power generating system is a promising opportunity to improve energy efficiency while reducing emissions. In this approach, a PEMFC would provide electrical energy during on-ground operations and emergency situations, while by-products water vapour and oxygen depleted air (ODA) would be used during flight for water generation and inerting (provision of non-inflammable atmosphere). This study presents a novel cathode exhaust gas dehumidification system based on an air cycle machine (compressor, heat exchanger, cyclone, turbine) which supplies liquid water and dry ODA for the aforementioned functions. First, feasibility of the multifunctional approach, quality of the generated water and necessary level of dehumidification are discussed. Next, real fluid property data and the system thermodynamic model are presented. Feasibility of the novel system is demonstrated with a parametric study on the effect of stoichiometry, compressor pressure ratio and turbine outlet pressure. Computed results show that: the target average O2 concentration of 10.5% (vol.) is maintained at stoichiometries below λO2≤1.8; for maximum humidity ratio xmax=0.002kgH2O/kgODA there is not risk of ice formation on condenser when compressor pressure ratio is above π ≥ 2.8. Finally, an estimation of added and potentially removed weight is given, also possible system configurations are derived.
KW - Civil aviation
KW - Dehumidification
KW - Multifunctional fuel cell
KW - Tank inerting
KW - Water generation
UR - http://www.scopus.com/inward/record.url?scp=85032736088&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2017.09.175
DO - 10.1016/j.ijhydene.2017.09.175
M3 - Article
AN - SCOPUS:85032736088
VL - 42
SP - 29518
EP - 29531
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 49
ER -