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Abstrakt

This brief note focuses on a simple fluid, i.e., a homogeneous, chemically inert, and electrically neutral fluid, for which, in the linear nonequilibrium regime, the thermodynamic state is expressed by a relation between pressure, temperature, and density. The approach based on the elementary scales is used to check the validity range of both the classical irreversible thermodynamics and the extended irreversible thermodynamics. The achieved result reveals that the classical irreversible thermodynamics fails in providing an adequate response when the mechanical solicitations exceed limit values.
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Bibliografia

[1] Gad-el-Hak M.: The fluid mechanics of microdevices-the Freeman scholar lecture. J. Fluids Eng. 121(1999), 1, 5–33.
[2] Auriault J.-L.: Homogenization theory applied to porous media. Poromechanics 3(2005), 113–120.
[3] Di Nucci C., Celli D., Fischione P., Pasquali D.: Elementary scales and the lack of Fourier paradox for Fourier fluids. Meccanica 57(2022), 251–254.
[4] Jou D., Casas-Vázquez J., Lebon G.: Extended Irreversible Thermodynamics revisited (1988–98). Rep. Prog. Phys. 62(1999), 7, 1035–1142.
[5] Lenarczyk M., Domanski R.: Investigation of non-Fourier thermal waves interaction in a solid material. Arch. Thermodyn. 40(2019), 1, 115–126.
[6] Othman M.I.A., Abouelregal A.E.E.: The effect of pulsed laser radiation on a thermoviscoelastic semi-infinite solid under two-temperature theory. Arch. Thermodyn. 38(2017), 3, 77–99.
[7] Di Nucci C., Pasquali D., Celli D., Pasculli A., Fischione P., Di Risio M.: Turbulent bulk viscosity. Eur. J. Mech. B-Fluid. 84(2020), 446–454.
[8] Durst F.: Fluid Mechanics: An Introduction to the Theory of Fluid Flows. Springer- Verlag, Berlin – Heidelberg 2008.
[9] Frost W., Moulden T.H. (Eds.): Handbook of Turbulence: Vol. 1 Fundamentals and Applications. Plenum Press, New York – London 1977.
[10] Gallavotti G.: Foundations of Fluid Dynamics. Springer-Verlag, Berlin – Heidelberg 2002.
[11] Petersen K.B., Pedersen M.S.: The Matrix Cookbook. Tech. Univ. of Denmark, 2008.
[12] Panton R.: Incompressible Flow. John Wiley & Sons, Hoboken 2013.
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Autorzy i Afiliacje

Carmine Di Nucci
1
Daniele Celli
1
Piera Fischione
1
Davide Pasquali
1

  1. Environmental and Maritime Hydraulic Laboratory (LIAM), Civil, Construction-Architectural and Environmental Engineering Department (DICEAA), University of L’Aquila, Piazzale Ernesto Pontieri 1, Monteluco di Roio, 67100 L’Aquila, Italy

Abstrakt

In this study, an irreversible thermodynamic model for the high temperature proton exchange membrane fuel cell taking electrochemical and heat losses into account is developed. The power density, exergy destruction index, exergy sustainability index and ecological coefficient of performance is derived. The model was validated against experimental data. The influence of parameters on the irreversible thermodynamic performance of high temperature proton exchange membrane fuel cell are considered. The multi-objective particle swarm optimization algorithm is utilized to optimize the power, ecological coeffi-cient of performance and efficiency. The population distribution of the optimization variables was analyzed using a three-dimensional Pareto frontier analysis, and results show that the maximum power density, maximum efficiency and maximum ecological coefficient of performance being 6340 W/m2, 64.5% and 1.723 respectively, which are 43.28%, 3.7% and 17.8% higher than the preoptimized high temperature proton exchange membrane fuel cell. Moreover, the nondominated sorting genetic algorithm II and simulated annealing algorithm have been chosen versus multi-objective particle swarm optimization algorithm for making the optimization comparative analysis.
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Autorzy i Afiliacje

Yuting Wang
1
Zheshu Ma
1
Yongming Gu
1
Qilin Guo
1

  1. Nanjing Forestry University, College of Automobile & Traffic Engineering, 210037, China

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