Development of a Solid-Oxide Fuel Cell/Gas Turbine Hybrid System Model for Aerospace Applications

Freeh, Joshua E.; Pratt, Joseph William; Brouwer, Jacob

doi:10.1115/gt2004-53616

Cited by 44 publications

(52 citation statements)

References 13 publications

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“…UEL cells are continuing to gain credibility as alternative power sources in many applications, including stationary power, automotive propulsion, auxiliary power for large trucks, remote or backup power for telecommunications and other sensitive equipment, and even portable power for personal electronic devices. And although fuel cells have been used in space applications for decades, recently the aerospace industry has increased its attention on the possibility of using fuel cells in other applications, such as commercial aircraft auxiliary power units (APUs) [1,2], propulsive and/or auxiliary power for high-altitude long endurance (HALE) aircraft and orbiting platforms [3,4], and unmanned aerial vehicles (UAVs) [5,6].…”

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confidence: 99%

Performance of Proton Exchange Membrane Fuel Cell at High-Altitude Conditions

Pratt

Brouwer

Samuelsen

2007

Journal of Propulsion and Power

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The effects of oxygen concentration and ambient pressure on fuel cell performance are explored both in theory and in experiment. For fuel cells in general the effect due to a change in oxygen concentration is shown to be fundamentally different than the effect due to a change in cathode pressure, even if partial pressure is held constant. For a proton exchange membrane fuel cell, a significant reason for this difference comes from the nature of mass diffusion processes in the fuel cell structure, which infers that there is an optimum fuel cell design (macroscale and microscale) for a given operating pressure and oxygen concentration. In the experimental work a proton exchange membrane fuel cell was subjected to varying atmospheric conditions from sea level to 53,500 ft (16,307 m) with results analyzed up to 35,000 ft (10,668 m). The results showed that at low current density operation a decrease in either cathode pressure or concentration led to an increase in irreversible losses associated with reaction kinetics (activation polarization) and confirmed the differing effects of cathode pressure and oxygen concentration. Consideration of all these effects enables both fuel cell-and system-level optimization of aeronautical fuel cell-based power systems.

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confidence: 99%

Performance of Proton Exchange Membrane Fuel Cell at High-Altitude Conditions

Pratt

Brouwer

Samuelsen

2007

Journal of Propulsion and Power

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“…The high-temperature exhaust also allows increased efficiency by utilizing a hybrid SOFC/gas turbine engine to extract work out of the exhaust, and also provides a thermal feedback mechanism that can be utilized to reduce the losses involved in fuel reforming [5]. A sample SOFC-hybrid power plant for aerospace applications, capable of providing 200 kW of electrical power has previously been proposed by Freeh et al [6].…”

Section: Introductionmentioning

confidence: 98%

Optimization of Jet-A fuel reforming for aerospace applications

Ibarreta¹,

Sung²

2006

International Journal of Hydrogen Energy

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“…Due to their lower emissions and higher efficiency, fuel cells are considered as an alternative energy to conventional fuel combustion power generation [1,2]. Among various types of fuel cells, solid oxide fuel cell (SOFC) operating at high temperature can combine with electrical power and thermal recycling, which leads to higher system efficiency than other fuel cell systems [3]. Furthermore, with the multi-fuel capability solid oxide fuel cells are more attractive than other fuel cells [4].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Flow Distribution in an External Manifold SOFC Stack by Computational Fluid Dynamics Technique

Wang

Yan

et al. 2014

Fuel Cells

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In this study, the flow distribution in a planar solid oxide fuel cell (SOFC) stack with external manifolds is investigated by computational fluid dynamics (CFD) technique. Three dimensional external manifold models are constructed for a SOFC stack composed of 24 cells. CFD simulations with air as operating gas are implemented for two types of stacks with different inlet manifolds, including the manifold with three tube inlets (T-manifold) and the manifold with a gas chamber on top (C-manifold). The influences of different parameters such as channel resistance and gas feeding rate on flow distribution are studied. Modeling results indicate that the increase of channel resistance and a lower gas feeding rate can respectively improve the uniformity factor of Tmanifold and C-manifold from 0.963 to 0.995 and 0.989 to 0.998. For a given channel resistance, the pressure distribution in the inlet manifold plays a dominant role in the flow distribution. In addition, flow distribution in the stack with C-manifold is generally more uniform than the stack with Tmanifold. Furthermore, flow characteristics of the two type inlet manifolds are investigated by measuring velocity distribution of the gas at manifold outlets using a hot-wire anemometer.

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Development of a Solid-Oxide Fuel Cell/Gas Turbine Hybrid System Model for Aerospace Applications

Cited by 44 publications

References 13 publications

Performance of Proton Exchange Membrane Fuel Cell at High-Altitude Conditions

Performance of Proton Exchange Membrane Fuel Cell at High-Altitude Conditions

Optimization of Jet-A fuel reforming for aerospace applications

Investigation on Flow Distribution in an External Manifold SOFC Stack by Computational Fluid Dynamics Technique

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