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Promising Electric Aircraft Drive Systems - page 10 / 23

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State of Fuel-cell Technology

Stack Power Density (kW/kg)

2.0

1.6

1.2

0.8

0.4

Proton Exchange Membrane (PEM) Fuel Cell Solid Oxide Fuel Cell (SOFC)

1.25 kW/kg at system level

0.5 kW/kg at system level

8

6

4

2

0

Commercial PEM Fuel Cell

Technology Readiness Level (TRL)

  • Significant opportunity exists to reduce weight of balance of plant through use of lightweight materials and composite materials (~50% weight reduction possible) – 1 kW/kg stack would correspond to 0.66 kW/kg at system level

Developmental SOFC

  • Effective system integration may yield further weight reductions

EAA Electric Aircraft World Symposium 2010: Michael Dudley

Balance of Plant Contributes Significant Weight (~50%)

10

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