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Research Papers

Solid Oxide Fuel Based Auxiliary Power Unit for Regional Jets: Design and Mission Simulation With Different Cell Geometries

[+] Author and Article Information
M. Santarelli

Dipartimento di Energetica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italymassimo.santarelli@polito.it

M. Cabrera, M. Calì

Dipartimento di Energetica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy

J. Fuel Cell Sci. Technol 7(2), 021006 (Jan 05, 2010) (11 pages) doi:10.1115/1.3176282 History: Received February 20, 2008; Revised April 19, 2008; Published January 05, 2010; Online January 05, 2010

Although it accounts for only 4.2% of the total global warming potential, the concern today is that aviation generated CO2 is projected to grow to approximately 5.7% by 2050. Aviation emissions are growing faster than any other sector and they risk undermining the progress achieved through emission cuts in other areas of the economy. Rapidly emerging hydrogen and fuel-cell-based technologies could be developed for future replacement of on-board electrical systems in “more-electric” or “all-electric” aircrafts. Primary advantages of deploying these technologies are low emissions and low noise (important features for commuter airplanes, which takeoff and land in urban areas). Solid oxide fuel-cell (SOFC) systems could result advantageous for some aeronautical applications due to their capability of accepting hydrocarbons and high energy-density fuels. Moreover they are suitable for operating in combined-heat-and-power configurations, recovering heat from the high-temperature exhaust gases, which could be used to supply thermal loads therefore reducing the electric power requested by the aircraft. ENFICA-FC is a project selected by the European Commission in the Aeronautics and Space priority of the Sixth Framework Programme (FP6) and led by Politecnico di Torino, in Turin, Italy. One of the objectives of the project is to carry out a feasibility study on a more-electric intercity aircraft (regional jet: 32 seats). After the characterization of the power consumption of electrical and nonelectrical loads, and the definition of a mission profile, the design of the SOFC-based energy system as well as the simulation of a complete mission is performed hypothesizing different system configurations. The simulation concerns both the stack (current and current density, cell and stack voltage, etc.) and the balance-of-plant (air compressor power, gross stack power, system efficiency, etc.). The obtained results are analyzed and discussed.

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Copyright © 2010 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Three views of Dornier 328JET

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Figure 2

Typical mission range profile

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Figure 3

Integrated environment control system

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Figure 4

Example of a SOFC system layout

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Figure 5

Gross electric power along the mission

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Figure 6

Current density along the mission

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Figure 7

Cell voltage along the mission

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Figure 8

Impact of air compression power over nominal power of the stack (kW)

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Figure 9

Effective recoverable thermal power in all mission phases

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Figure 10

AC heating thermal load coverage in all the mission phases (kW)

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Figure 11

Fuel consumption in all mission phases and cumulative

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