Comparison between pressurized design and ambient pressure design of hybrid solid oxide fuel cell–gas turbine systems

Park, S.K.; Kim, T.S.

doi:10.1016/j.jpowsour.2006.09.036

Cited by 95 publications

(50 citation statements)

References 6 publications

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“…Until now, pressurised hybrid SOFC systems have been developed [3][4][5], but the need to develop ambient pressure systems has also been recognised because developers have experienced some critical problems in designing and operating the early versions of the pressurised system (system complexity, difficulty in matching SOFC and GT, etc.) [14]. Studies of hybrid cycles indicate that atmospheric system configurations would be less complex to develop and quicker to implement than pressurised ones.…”

Section: System Configurationmentioning

confidence: 99%

“…An ambient pressure system has several advantages, the most prominent of which is selection of the GT pressure independently of the fuel cell pressure [10]. Since they would require less integration of the SOFC and gas turbine, they also have the potential to be less expensive and could accommodate a wider variety of gas turbines [14]. Accordingly, an ambient pressure system is examined in the present study as a representative layout for integrating a fuel cell and gas turbine, as schematically depicted in Figure 1, where the fuel cell acts as the high-temperature heat reservoir of the gas turbine for the further production of power.…”

Section: System Configurationmentioning

confidence: 99%

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The Development and Application of a Novel Optimisation Strategy for Solid Oxide Fuel Cell‐Gas Turbine Hybrid Cycles

2010

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A combined power system with solid oxide fuel cell (SOFC) and gas turbine (GT) is modelled and analysed thermodynamically in this paper. A novel optimisation strategy including the design of optimal parameters is proposed and applied to the hybrid system. Different sources of irreversible losses are specified, and entropy analyses are used to indicate the multi‐irreversibilities existing, and to assess the work potentials of the system. Expressions of the power output and efficiency for both the subsystems and the SOFC‐GT hybrid system are derived. The optimal performance characteristics are presented and discussed in detail through a parametric analysis. The developed model is expected to provide not only a convenient tool to determine the optimal system performance and component irreversibility, but also an appropriate basis to design similar complex hybrid power plants. This new approach can be further extended to other energy conversion settings and electrochemical systems. Decision makers should therefore find the methodology contained in this paper useful in the comparison and selection of advanced heat recovery systems.

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Section: System Configurationmentioning

confidence: 99%

Section: System Configurationmentioning

confidence: 99%

The Development and Application of a Novel Optimisation Strategy for Solid Oxide Fuel Cell‐Gas Turbine Hybrid Cycles

2010

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“…Studies to develop new system configurations for better performance are still in progress. In this regard, a number studies were analysed ambient pressure design of hybrid SOFC-GT system and performances were compared with a pressurized system, like the studies of Park et al (2006;. Kuchonthara et al (2003) evaluated a combination of SOFC and various gas turbine cycles such as STIG cycle, gas turbine/steam turbine combined cycle and humid air turbine (HAT) cycle.…”

Section: Introductionmentioning

confidence: 99%

Comparison Between Conventional Design and Cathode Gas Recirculation Design of a Direct-Syngas Solid Oxide Fuel Cell–Gas Turbine Hybrid Systems Part I: Design Performance

Azami

Yari

2017

Int. J. Renew. Energy Dev.

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ABSTRACT. In this paper, a conventional SOFC-GT hybrid system and an SOFC-GT hybrid system with cathode gas recirculation system fuelled with syngas as the main source of energy were analyzed and their performances were compared. In the conventional SOFC-GT hybrid system the incoming air to the cathode is heated at the air recuperator and air preheater to meet the required cathode inlet temperature while in the SOFC-GT hybrid system with cathode gas recirculation, in addition to the air recuperator and air preheater, also the recirculation of the cathode exhaust gas is used to meet the required cathode inlet temperature. The system performances have been analyzed by means of models developed with the computer program Cycle-Tempo. A complete model of the SOFC-GT hybrid system with these two configurations evaluated in terms of energy and exergy efficiencies and their performance characteristics were compared. Simulation results show that the electrical energy and exergy efficiencies achieved in the cathode gas recirculation plant (64.76% and 66.28%, respectively) are significantly higher than those obtained in the conventional plant (54.53% and 55.8%).Keywords: Solid oxide fuel cell, Gas turbine, Cathode gas recirculation, Exergy.

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“…SOFCs can be designed to operate either at an ambient pressure system or pressurised system [4]. Combined with the gas turbine (GT) system the high pressure air from the compressor is delivered directly to the fuel cell and the outgoing high pressure gas drives the turbine in a pressurised system.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation into Thermofluidic and Electrochemical Characteristics of Tubular‐type SOFC

Kuo

2010

Fuel Cells

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Three‐dimensional simulations based on a multi‐physics model are performed to examine the thermofluidic and electrochemical characteristics of a tubular, anode‐supported solid oxide fuel cell (SOFC). The simulations focus on the local transport characteristics of the cathode and anode gases and the distribution of the temperature field within the fuel cell. In addition, the electrochemical properties of the SOFC are systematically examined for a representative range of inlet gas temperatures and pressures. The validity of the numerical model is confirmed by comparing the results obtained for the correlation between the power density and the current density with the experimental results presented in the literature. Overall, the present results show that the performance of the tubular SOFC is significantly improved under pressurised conditions and a higher operating temperature.

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Comparison between pressurized design and ambient pressure design of hybrid solid oxide fuel cell–gas turbine systems

Cited by 95 publications

References 6 publications

The Development and Application of a Novel Optimisation Strategy for Solid Oxide Fuel Cell‐Gas Turbine Hybrid Cycles

The Development and Application of a Novel Optimisation Strategy for Solid Oxide Fuel Cell‐Gas Turbine Hybrid Cycles

Comparison Between Conventional Design and Cathode Gas Recirculation Design of a Direct-Syngas Solid Oxide Fuel Cell–Gas Turbine Hybrid Systems Part I: Design Performance

Numerical Investigation into Thermofluidic and Electrochemical Characteristics of Tubular‐type SOFC

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