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

Zhao, Yingru; Shah, Nilay; Brandon, Nigel P.

doi:10.1002/fuce.200900127

Cited by 18 publications

(9 citation statements)

References 53 publications

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“…Note that this equation captures the effects of fuel cell temperature changes. A detailed explanation and definition of these parameters can be found in our previous publication [22,23].…”

Section: Modelling the Heat Exchangersmentioning

confidence: 99%

Modelling of a Solid Oxide Fuel Cell CHP System Coupled with a Hot Water Storage Tank for a Single Household

et al. 2015

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Abstract:In this paper a solid oxide fuel cell (SOFC) system for cogeneration of heat and power integrated with a stratified heat storage tank is studied. The use of a storage tank with thermal stratification allows one to increase the annual operating hours of CHP: heat can be produced when the request is low (for instance during the night), taking advantage of thermal stratification to increases the heat recovery performance. A model of the SOFC system is presented to estimate the energy required to meet the average electric energy demand of the residence. Two fuels are considered, namely syngas produced by gasification and natural gas. The tank model considers the temperature gradients over the tank height. The results of the numerical simulation are used to size the SOFC system and storage heat tank to provide energy for a small household using two different fuels. In particular it was shown that in the case of syngas, due to larger system heat output, a larger tank volume was required in order to accumulate unused heat over the night. The detailed description of the tank model will be useful to energy system modelers when sizing hot water tanks. Problem formulation is reported also using a Matlab script.

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“…Note that this equation captures the effects of fuel cell temperature changes. A detailed explanation and definition of these parameters can be found in our previous publication [22,23].…”

Section: Modelling the Heat Exchangersmentioning

confidence: 99%

Modelling of a Solid Oxide Fuel Cell CHP System Coupled with a Hot Water Storage Tank for a Single Household

et al. 2015

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“…Eq. (40) implies that the exit temperature of the combustor T c is a function of the SOFC operating temperature T.…”

Section: Combustormentioning

confidence: 99%

“…In the present study, heat loss is modelled based on the temperature difference between the SOFC and ambient conditions [40][41][42]:…”

Section: Modelling the Heat Exchangersmentioning

confidence: 99%

Optimal design and operation of a syngas-fuelled SOFC micro-CHP system for residential applications in different climate zones in China

Yang

Zhao

Liso

et al. 2014

Energy and Buildings

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Early version, also known as pre-print Link to publication from Aalborg University Citation for published version (APA):Yang, W., Zhao, Y., Liso, V., & Brandon, N. (2014). Optimal design and operation of a syngas-fuelled SOFC micro CHP system for residential applications in different climate zones in China. Energy and Buildings, 80, 613-622. https://doi.org/10.1016/j.enbuild.2014.05.015 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.? Users may download and print one copy of any publication from the public portal for the purpose of private study or research. ? You may not further distribute the material or use it for any profit-making activity or commercial gain ? You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us at vbn@aub.aau.dk providing details, and we will remove access to the work immediately and investigate your claim. t r a c tFuel cell based micro-CHP systems are expected to be one of the most promising technologies for implementation in the residential sector. Since the design and operation of such CHP systems are greatly dependent upon the seasonal atmospheric conditions, it is important to evaluate their performance under difference climate conditions to ensure that it is well matched with the local heat-to-power ratio. The aim of this study is to investigate the optimal design and operation of a syngas-fuelled SOFC micro-CHP system for small households located in five different climate zones in China. The ability of the micro-CHP to cover the heat and electricity demand of a 70 m 2 single-family apartment with an average number of occupants of 3 is evaluated. A detailed model of the micro-CHP unit coupled with a hot water storage tank and an auxiliary boiler is developed. System design trade-offs are discussed to determine the optimal match between the energy demand of the household for different climates across China and the energy supply of the micro-CHP during the whole year. Moreover, criteria for sizing the system components of the micro-CHP are specifically addressed. The developed methodology can be applied to different types of residence with different load profiles.

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“…SOFCs show up to 60%, chemical to electrical efficiency in full scale trials [1][2][3]. They have also been shown to be fuel flexible and tolerant of impurities such as sulfur [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Solid Oxide Fuel Cells with Particle Size and Porosity Grading in Anode Electrode

Liu¹,

Flesner²,

Kim³

et al. 2012

Fuel Cells

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Solid oxide fuel cells (SOFCs) have the potential to meet the critical energy needs of our modern civilization and minimize the adverse environmental impacts from excessive energy consumption. They are highly efficient, clean, and can run on variety of fuel gases. However, little investigative focus has been put on optimal power output based on electrode microstructure. In this work, a complete electrode polarization model of SOFCs has been developed and utilized to analyze the performance of functionally graded anode with different particle size and porosity profiles. The model helps to understand the implications of varying the electrode microstructure from the polarization standpoint. The work identified conditions when grading can improve the cell performance and showed that grading is not always beneficial or necessary.

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

Cited by 18 publications

References 53 publications

Modelling of a Solid Oxide Fuel Cell CHP System Coupled with a Hot Water Storage Tank for a Single Household

Modelling of a Solid Oxide Fuel Cell CHP System Coupled with a Hot Water Storage Tank for a Single Household

Optimal design and operation of a syngas-fuelled SOFC micro-CHP system for residential applications in different climate zones in China

Modeling of Solid Oxide Fuel Cells with Particle Size and Porosity Grading in Anode Electrode

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