Energy and exergoeconomic evaluation of a new power/cooling cogeneration system based on a solid oxide fuel cell

Khani, Leyla; Mahmoudi, S.M.S.; Chitsaz, Ata; Rosen, Marc A.

doi:10.1016/j.energy.2015.11.001

Cited by 136 publications

(22 citation statements)

References 37 publications

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“…The total cost rate of capital investment, operating and maintenance for the SOFC, $%&' is evaluated by the formula below [31]: where $")) and $")) are the area and number of cells. $")) is the operating temperature of fuel cell, ] is the interest rate (12%), ∅ denotes the maintenance factor, assumed as 1.1, is the number of system operating hours (8600/year) and is the system life (20 years) [31].…”

Section: Constraints and Objective Functionsmentioning

confidence: 99%

A Novel Design of a Solid Oxide Fuel Cell-Based Combined Cooling, Heat and Power Residential System in the U.K.

Yuan

Liu

Bucknall

2021

IEEE Trans. on Ind. Applicat.

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This paper details the use of objective sizing techniques for a novel design of a residential solid oxide fuel cell (SOFC) combined cooling, heat and electrical power (CCHP) for UK market. The aim of the research is to determine the objective sizing of parameters taking into account the aspects of efficiency, economic and environmental impacts by the entropyweighting approach and grey relationship analysis. The combination of these two approaches helps designers objectively maximise efficiency of energy utilization and minimise emissions and costs of the system that is examined. It is envisaged that electrical demand is met by the fuel cell stacks while the most efficient use is made of heat that is generated by the fuel cell through waste heat recovery to satisfy domestic hot water, freezers, space heating and space cooling. The demand of conventional electric freezers is innovatively designed to be fulfilled by heat exchangers and absorption chillers to further increase the efficiency of heat use. Due to the particularity of the energy demand of the domestic sector in the UK, the proposed system structure, sizing values and control strategiessupported by MATLAB R2018a/Simulink-are suited to the residential energy demands of a single household.

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Section: Constraints and Objective Functionsmentioning

confidence: 99%

A Novel Design of a Solid Oxide Fuel Cell-Based Combined Cooling, Heat and Power Residential System in the U.K.

Yuan

Liu

Bucknall

2021

IEEE Trans. on Ind. Applicat.

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“…Rosen [21] has quantified an equation that is helpful in calculating the chemical exergy of rice husk. Overall exergy of fuel can be calculated given the individual component`s standard chemical exergy and molar ratio.…”

Section: Boilermentioning

confidence: 99%

“…Rankine cycle and combined cycle energy and exergy analysis were studied by Kaushik et al [20] concluded that although condenser is the largest source for energy losses, boiler offers maximum exergy loss especially in the combustion processes, can happen due to incomplete combustion phenomena & insufficient insulation. The boiler of the steam power plant was analyzed on basis of energy and exergy by Khani et al [21], concluded that exergy efficiency is increased to 0.19% & 0.37% respectively as excess air fraction is decreased to 0.4 and 0.15. Furthermore, with the decrease in temperature of flue gases leaving the stack, from 137 °C to 90 °C, the increase in exergy efficiency was about 1.5%.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the thermodynamic performance of an existing steam power plant via energy and exergy analyses to restrain the environmental repercussions: A simulation study

Hamayun

Hussain

Shafiq

et al. 2021

Environmental Engineering Research

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Exergy analysis is an important tool to identify the improvements in various industrial processes. In this study, the existing steam power plant is examined based on energy and exergy analyses. The steam network in the power plant is comprised of two sections, one of them is used for paddy drying, while other portion is used to operate the turbine for in-house electricity production. Mass, energy, and exergy balances are applied to individual equipment of the plant. The power plant is modeled and simulated using Aspen HYSYS® V10. The calculated thermodynamic values are used for in-depth analysis of the power plant. Case-studies are included in this study to show the effect of various operational parameters on the process efficiency. The analysis shows that the boiler is the major source of exergy destruction, because of the incomplete combustion process, and inappropriate insulations. The remedial actions are also suggested in the study.

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“…To further enhance the system performance, the GA, which has been applied to single-objective optimization 31,32 and multi-objective optimization 33,34 in various combined energy conversion systems, is employed to perform a parametric optimization. In the present study, two types of optimizations are conducted, and the decision variables together with their ranges and constraints are tabulated in Table 5.…”

Section: Optimization Studymentioning

confidence: 99%

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle

et al. 2020

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Summary The paper proposes a novel combined heating and power (CHP) system integrated with solid oxide fuel cell (SOFC) and supercritical CO2 (SCO2) partial preheating cycle to improve the energy utilization rate by employing the SCO2 cycle to recover the waste heat from the SOFC. The SCO2 partial preheating cycle can not only improve the net output power but also preheat the air supplied to the SOFC for enhancing the system efficiency. Sensitivity analysis is implemented to study the influences of six key parameters (ie, fuel flow rate, excess air ratio, fuel utilization factor, CO2 turbine inlet temperature, CO2 compressor pressure ratio, and CO2 split ratio) on the proposed system in terms of thermodynamic behaviors. And then the optimal operating conditions for the different objectives are determined by parametric optimization. The results indicate that the optimal overall electrical efficiency and CHP efficiency of the proposed system are 72.84% and 83.83% respectively, while the exergy efficiency can achieve 70.84%. Furthermore, the best trade‐off result is obtained with the energy output of 434.71 kW and the exergy efficiency of 64.28%. Finally, the investigation demonstrates the fuel flow rate is the most sensitive parameter which should be determined with the comprehensive consideration of the efficiency and energy output, and the lower excess air ratio and higher CO2 turbine inlet temperature are preferred for power generation.

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Energy and exergoeconomic evaluation of a new power/cooling cogeneration system based on a solid oxide fuel cell

Cited by 136 publications

References 37 publications

A Novel Design of a Solid Oxide Fuel Cell-Based Combined Cooling, Heat and Power Residential System in the U.K.

A Novel Design of a Solid Oxide Fuel Cell-Based Combined Cooling, Heat and Power Residential System in the U.K.

Investigation of the thermodynamic performance of an existing steam power plant via energy and exergy analyses to restrain the environmental repercussions: A simulation study

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle

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Energy and exergoeconomic evaluation of a new power/cooling cogeneration system based on a solid oxide fuel cell

Cited by 136 publications

References 37 publications

A Novel Design of a Solid Oxide Fuel Cell-Based Combined Cooling, Heat and Power Residential System in the U.K.

A Novel Design of a Solid Oxide Fuel Cell-Based Combined Cooling, Heat and Power Residential System in the U.K.

Investigation of the thermodynamic performance of an existing steam power plant via energy and exergy analyses to restrain the environmental repercussions: A simulation study

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO2partial preheating cycle

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Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle