Analysis of Post Combustion in Solid Oxide Fuel Cell Combustor Gas Turbine Hybrid Power Generation Cycle

The shipping industry is facing increasing requirements to decrease its environmental footprints. This challenge is being addressed through the use of alternative fuels and adoption of novel energy sources in advanced power and propulsion systems. In this paper, an energy management approach is proposed to determine the optimal split between different energy sources of a vessel with hybrid power generation. The power and propulsion system of the vessel consists of a gas engine-generator set and a solid oxide fuel cell, both fed with liquefied natural gas, and a battery. Specific fuel consumption curves and transient capabilities of the engine and fuel cell are used to determine the optimal split and the battery is used to deal with the fast load transients during heavy operations and also providing power during low power demanding activities. The performance of the proposed approach is evaluated for a dredging vessel with a DC power and propulsion system and compared to a benchmark vessel powered by gas engine-generator sets only. The results indicate a 16.5% reduction in fuel consumption compared to a benchmark non-hybrid power system and conventional power management.

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Detailed Performance Analysis of a Solid Oxide Fuel Cell: Micro Gas Turbine Hybrid Power System

Volume 3 ◽

10.1115/ht-fed2004-56630 ◽

2004 ◽

Cited By ~ 1

Author(s):

Tae Won Song ◽

Jeong L. Sohn ◽

Jae Hwan Kim ◽

Tong Seop Kim ◽

Sung Tack Ro ◽

...

Keyword(s):

Fuel Cell ◽

Performance Analysis ◽

Power System ◽

Solid Oxide Fuel Cell ◽

Gas Turbine ◽

Solid Oxide ◽

Oxide Fuel ◽

Hybrid Power System ◽

Micro Gas Turbine ◽

Hybrid Power

Performance of a solid oxide fuel cell (SOFC) can be enhanced by converting thermal energy of its high temperature exhaust gas to mechanical power using a micro gas turbine (MGT). A MGT plays also an important role to pressurize and warm up inlet gas streams of the SOFC. Performance behavior of the SOFC is sensitively influenced by internal constructions of the SOFC and related to design and operating parameters. In case of the SOFC/MGT hybrid power system, internal constructions of the SOFC influence not only on the performance of the SOFC but also on the whole hybrid system. In this study, influence of performance characteristics of the tubular SOFC and its internal reformer on the hybrid power system is discussed. For this purpose, detailed heat and mass transfer with reforming and electrochemical reactions in the SOFC are mathematically modeled and their results are reflected to the performance analysis. Effects of different internal constructions of the SOFC system and design parameters such as current density, recirculation ratio, fuel utilization factor, and catalyst density in internal reformer on the system performance are investigated and, as a result, some guidelines for the choice of those parameters for optimum operations of the SOFC/MGT hybrid power system are discussed.

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