Info

Current density; 250 mA/cm2

Reformer

l,000kW class, Multi-tube type

Foot prints

^ 0.1 mVkff

Fuel

Natural gas , Pressure : 0.7 kg/cm2G

Air Blower

Air Blower

CHARACTERISTICS OF KEY PLANT COMPONENT fl) Fuel cell

To achieve high performance and compactness, large, 1 m square class high—performance fuel cell capable of generating 250 mA/cm2 at atmospheric pressure were selected.

The fuel cell package consists of 2 fuel cell stacks (414 cells/stack), and these stacks are arranged closely with symmetrical configuration of gas manifold. This arrangement can achieve approximately 24% less foot print than the conventional independent two cell stack configuration.

(2) Reformer

The multi—tube type reformer which has 30 reforming tubes inside a vertically positioned cylindrical vessel was developed and employed. To improve heat recovery by high—temperature steam, a reforming system that can minimize the amount'of steam necessary for reforming process was developed. This has enabled achievement of a steam/carbon ratio of 2.5 at the rated power level.

(3) Inverter

The inverter has been down-sized 40% compared to a conventional GTO-based unit by using IGBT devices in the main circuit A self—exciting voltage type PWM control method was selected and a current control function was developed and integrated which allows stable operation even when monentary voltage drop occurs.

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