Exergy analysis and multiobjective optimization of a biomass gasification based multigeneration system

Rashidi, Halimeh; Khorshidi, Jamshid

doi:10.1016/j.ijhydene.2017.12.073

Cited by 64 publications

(10 citation statements)

References 49 publications

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“…[36] for a recent review of literature. Amongst other techniques, exergy and entropy generation minimisation have been employed to improve the design of biomass gasification systems [37]. Central to achieving improved modelling of the second law performance of biomass gasifiers, is obtaining an in-depth understanding of transport and entropy generation during gasification of single particles.…”

Section: Introductionmentioning

confidence: 99%

Gas-phase transport and entropy generation during transient combustion of single biomass particle in varying oxygen and nitrogen atmospheres

Wang

Karimi

Paul

2018

International Journal of Hydrogen Energy

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Transient combustion of a single biomass particle in preheated oxygen and nitrogen atmospheres with varying concentration of oxygen is investigated numerically. The simulations are rigorously validated against the existing experimental data. The unsteady temperature and species concentration fields are calculated in the course of transient burning process and the subsequent diffusion of the combustion products into the surrounding gases. These numerical results are further post processed to reveal the temporal rates of unsteady entropy generation by chemical and transport mechanisms in the gaseous phase of the reactive system. The spatio-temporal evolutions of the temperature, major chemical species including CO, CO2, O2, H2 and H2O, and also the local entropy generations are presented. It is shown that the homogenous combustion of the products of devolatilisation process dominates the temperature and chemical species fields at low concentrations of oxygen. Yet, by oxygen enriching of the atmosphere the post-ignition heterogeneous reactions become increasingly more influential. Analysis of the total entropy generation shows that the chemical entropy is the most significant source of irreversibility and is generated chiefly by the ignition of volatiles. However, thermal entropy continues to be produced well after termination of the particle life time through diffusion of the hot gases. It also indicates that increasing the molar concentration of oxygen above 21% results in considerable increase in the chemical and thermal entropy generation. Nonetheless, further oxygen enrichment has only modest effects upon the thermodynamic irreversibilities of the system.

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Section: Introductionmentioning

confidence: 99%

Gas-phase transport and entropy generation during transient combustion of single biomass particle in varying oxygen and nitrogen atmospheres

Wang

Karimi

Paul

2018

International Journal of Hydrogen Energy

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“…Así pues, las investigaciones de los últimos cinco años se centran principalmente en optimizar teniendo como criterio la minimización de la destrucción de exergía. Se proponen por 1 Búsquedas realizadas el día 16 de marzo de 2021 en ScienceDirect con los siguientes términos de búsqueda: "Exergy" AND "Optimization" AND "Plant" Aplicaciones de la exergía en casos de optimizacion de plantas ejemplo, la optimización de sistemas de refrigeración y acondicionamiento de espacios mediante la minimización de la exergía destruida (Flórez-Orrego & de Oliveira Junior, 2017;Singh & Das, 2017); también se han presentado optimizaciones para procesos de generación de energía y producción de coque que usan la misma metodología (C. Liu et al, 2017;Rashidi & Khorshidi, 2018).…”

Section: Marco Teórico Y Estado Del Arte 21 Exergíaunclassified

Energy, Exergy analysis and optimization of solar thermal power plant with adding heat and water recovery system

Vakilabadi

Bidi

Najafi

2018

Energy Conversion and Management

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“…Sahoo et al 11 investigated the coincident production of power, cooling, and freshwater using a solar-biomass cofed system. Rashidi et al 12 presented thermodynamic and thermoeconomic simulation of a heating, cooling, and electrical power production system based on the biomass gasification process. Then, they optimized the system considering exergy efficiency and total cost rate as the objective functions based on differential evolution algorithms and local unimodal sampling techniques.…”

Section: Introductionmentioning

confidence: 99%

Multi‐objective optimization of a novel biomass‐based multigeneration system consisting of liquid natural gas open cycle and proton exchange membrane electrolyzer

et al. 2021

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In the present study, multi-objective optimization has been conducted to optimize a novel multigeneration system that is based on biomass energy, and uses the cold energy of the liquid natural gas as a heat sink. The designed system is an integration of combined gas-steam cycle, a cascade Rankine cycles, a lithium bromide-water absorption refrigeration cycle, a proton exchange membrane electrolyzer, and a liquid natural gas subsystem. The proposed system aims to produce power, cooling, natural gas, and hydrogen. Following thermodynamic and exergoeconomic analysis, two conflicting objectives, that is, total product cost rate and exergy efficiency, are selected for the optimization process. The genetic algorithm is used to optimize the system and the Pareto front plot is achieved. The obtained results for this system reveal that the final optimization point has an exergy efficiency of 39.023% and a total product cost rate of 1107$/h. This point is a trade-off between thermodynamic and thermoeconomic single-objective optimization cases. In addition, the biomass gasification-gas turbine cycle, organic Rankine cycles, and proton exchange membrane have the highest exergy destruction rates, respectively. Finally, it is shown that the liquid pressure ratio of the natural gas pump and inlet temperature of the steam turbine have the most important effects on the balance between the selected objective parameters.

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Exergy analysis and multiobjective optimization of a biomass gasification based multigeneration system

Cited by 64 publications

References 49 publications

Gas-phase transport and entropy generation during transient combustion of single biomass particle in varying oxygen and nitrogen atmospheres

Gas-phase transport and entropy generation during transient combustion of single biomass particle in varying oxygen and nitrogen atmospheres

Energy, Exergy analysis and optimization of solar thermal power plant with adding heat and water recovery system

Multi‐objective optimization of a novel biomass‐based multigeneration system consisting of liquid natural gas open cycle and proton exchange membrane electrolyzer

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