Thermodynamic Modeling of Blade Cooled Turboprop Engine Integrated to Solid Oxide Fuel Cell: A Concept

Choudhary, Tushar; Sahu, Mridu; Sanjay, R; Kumari, Anupam; Mohapatra, Alok K.

doi:10.4271/2018-01-1308

Cited by 8 publications

(5 citation statements)

References 30 publications

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“…Using recuperator, the available waste heat at the gas turbine outlet has been utilized to charge up the working fluid and fuel. The effectiveness (ε) of recuperator is given as [24]: The mass and energy balance equation for the recuperator is expressed as:…”

Section: Recuperatormentioning

confidence: 99%

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Thermodynamic sensitivity analysis of SOFC integrated with blade cooled gas turbine hybrid cycle

Choudhary

Verma

SAHU³

et al. 2023

Journal of Thermal Engineering

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In the area of clean energy production along with higher efficiency, integrated combine power system, specifically gas turbine (GT) cycle with solid oxide fuel (SOFC) system, is gaining the attention of researchers. Thermodynamic modeling for the SOFC-GT hybrid cycle has been presented in this paper. For the proposed hybrid cycle, a high-temperature SOFC has successfully integrated with the recuperated-blade cooled gas turbine cycle. The gas turbine outlet waste heat has perfectly utilized the recuperator to power the fuel cell system. However, to maintain the temperature of the gas turbine blade within the permissible limit, air–film blade cooling scheme has been used. The SOFC-GT hybrid cycle has been operated under steady-state conditions, and a developed MATLAB program has been used to solve the governing equations for the components of the hybrid cycle. The impact of main operating parameters such as the temperature intake turbine (TIT), compression ratio (rpc), fuel utilization ratio (UF), and recirculation ratio are examined. From the obtained result, it can be revealed that the integration of the SOFC has seen significant improves overall hybrid cycle efficiency. The performance of fuel cell (SOFC) increases notably as the level of recuperation increases. To check the influence of main operating parameters, a sensitivity analysis has been performed for the hybrid cycle, and the maximum efficiency of 73% has been achieved. Moreover, to extend this research, an exclusive performance map has been plotted for power plant designers.

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Section: Recuperatormentioning

confidence: 99%

“…From the comprehensive literature review, it has been found that no such work has been reported where a cooled gas turbine engine has been integrated with internal reformed SOFC. In contrast, the research related to gas turbine cooling exhibits [23][24][25][26] and is still in maturing stage.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic sensitivity analysis of SOFC integrated with blade cooled gas turbine hybrid cycle

Choudhary

Verma

SAHU³

et al. 2023

Journal of Thermal Engineering

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“…They also discovered that adding extra fuel lowers the system's exergy efficiency. Moreover, Chaudhary et al [18] proposed a concept of hybridizing air-blade cooled turboprop engines with SOFC system, which can utilize the waste heat of the engine exhaust and increase the overall performance of the hybrid system. They performed a thermodynamic analysis of the turboprop-SOFC system based on the 1st and 2nd laws of thermodynamics and investigated the effects of various parameters such as compressor pressure ratio, turbine inlet temperature, and airflow rate on the system.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics, Environmental and Sustainability Impacts of a Turbofan Engine Under Different Design Conditions Considering Variable Needs in the Aviation Industry

Aygun,

Sheikhi,

Caliskan

2024

Global Challenges

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In this study, thermodynamic analysis is implemented to the kerosene‐fuelled high by‐pass turbofan (HBP‐TF) engine to assess entropy, exergy, environmental, and sustainability metrics for different design variables such as pressure ratio of high‐pressure compressor (HPC‐PR) ranging from 7.5 to 8.5 and turbine inlet temperature (TIT) varying from 1400 to 1525 K considering variable needs in the aviation industry. As a novelty, entropic improvement potential (EIP) index for turbomachinery components and specific irreversibility production for the whole engine are calculated. Sustainability‐based parameters for different cases are compared with the baseline values of the HBP‐TF engine. The combustor has the highest entropy production of 44.4425 kW K−1 at the baseline. The higher TIT increases the entropy production of the combustor by 16.56%, whereas the higher HPC‐PR decreases it by 5.83%. The higher TIT and HPC‐PR favorably affect the sustainable efficiency factor of the engine, which is observed as 1.5482 at baseline and increases by 4.5% and 0.058% with the increment of TIT and HPC‐PR, respectively. The higher TIT and higher HPC‐PR results in lowering sustainability of the engine. The specific irreversibility production of the engine decreases by 3.78% and 0.1171% respectively, as TIT and HPC‐PR reach the highest point considered in the study.

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“…Because of these benefits, SOFC has posed a great candidate for power generation in a wide range of scales and applications, including stationary and distributed power plants, auxiliary power unit (APU) in heavy duty trucks, and portable power generators . The SOFC cell can also be integrated into hybrid power generation systems, for example, the SOFC gas turbine hybrid system for power generation at very high efficiency …”

Section: Introductionmentioning

confidence: 99%

“…8 The SOFC cell can also be integrated into hybrid power generation systems, for example, the SOFC gas turbine hybrid system for power generation at very high efficiency. 9,10 The operation of SOFC involves transport of mass, momentum, species, charge, and energy, which are coupled with electrochemical reactions and internal reforming chemical reactions. Those processes inside SOFC are complex and hard to be measured experimentally indeed.…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional nonisothermal modeling of solid oxide fuel cell coupling electrochemical kinetics and species transport

Yan

Zhou

et al. 2019

Int J Energy Res

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Summary A three‐dimensional (3D) nonisothermal model is developed and applied for anode‐supported planar solid oxide fuel cell (SOFC). The mass and momentum, species, ion, electric, and heat transport equations are solved simultaneously by implementing the electrochemical kinetics and electrochemical reaction as volumetric source terms. The interconnect land limits the O2 transport under the land and lowers the local current density under the land. The effects of interconnect land width and cathode substrate thickness on SOFC cell performance are quantified in this study. Cathode stoichiometry is found to have a large effect on the SOFC cell temperature distribution. Under low‐cathode stoichiometry, significant temperature gradients are seen in the SOFC cell. Higher‐cathode stoichiometry is beneficial for lower temperature and more uniform current density distribution in SOFC cell. Co‐flow and counter‐flow arrangements are investigated and discussed with the model. Counter‐flow arrangement is found to induce a high temperature and high current density region near the H2 inlet. On the other hand, co‐flow arrangement leads high temperature and high current density to occur relatively downstream, a slightly lower maximum temperature on cell and considerably more uniform current density distribution. A 67.2‐cm2 SOFC cell is simulated considering the side cooling effect. The side cooling effectively lowers the cell temperature, at the same time, causes temperature, current density, and fuel utilization nonuniformity in the across multichannel direction. Because of the strong coupling of the in‐plane current density distribution and temperature distribution, limiting the locally high temperature and temperature gradient is critical for achieving a more uniform current density distribution in anode‐supported planar SOFC.

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Thermodynamic Modeling of Blade Cooled Turboprop Engine Integrated to Solid Oxide Fuel Cell: A Concept

Cited by 8 publications

References 30 publications

Thermodynamic sensitivity analysis of SOFC integrated with blade cooled gas turbine hybrid cycle

Thermodynamic sensitivity analysis of SOFC integrated with blade cooled gas turbine hybrid cycle

Thermodynamics, Environmental and Sustainability Impacts of a Turbofan Engine Under Different Design Conditions Considering Variable Needs in the Aviation Industry

Three‐dimensional nonisothermal modeling of solid oxide fuel cell coupling electrochemical kinetics and species transport

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