Experimental and numerical analysis of a serial connection of two SOFC stacks in a micro-CHP system fed by biogas

Kupecki, Jakub; Skrzypkiewicz, Marek; Wierzbicki, Michał; Stępień, Michał

doi:10.1016/j.ijhydene.2016.07.222

Cited by 58 publications

(20 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(1) [8,9]. By contrast, a two-stage stacks technology has been proposed [10] and its advantages have been investigated [11,12]. Due to the simplicity of the gas flow and the ease of module control, highly efficient SOFC modules were studied and developed using the two-stage stacks technology [13].…”

Section: Introductionmentioning

confidence: 99%

Development of a Highly Efficient SOFC Module Using Two‐stage Stacks and a Fuel Regeneration Process

et al. 2017

View full text Add to dashboard Cite

A solid oxide fuel cell (SOFC) module using two-stage stacks and a fuel regeneration process between them was developed in this study for the first time, to the best of the authors' knowledge. Upon configuring the first-stage and secondstage stacks and a steam reformer between them in the SOFC module, a gross output power of DC 2.27 kW was generated with gross power generation efficiency of DC 69.2% (lower heating value (LHV)), at a total fuel utilization rate of 86.3%. This technology enables operation at a very high total fuel utilization rate even while operating the stacks at a moderate fuel utilization rate (below 70%). Considering an auxiliary device loss (6%) and inverter loss (5%), the net power generation efficiency is estimated to be AC 61.8% (LHV); hence, the module is considered to exhibit a high power generation efficiency. Further increases in the power generation efficiency could be realized in the future by removing the CO 2 from the anode off-gas during the fuel regeneration process and/or operating the stacks at higher temperatures by decreasing heat leakage from the module.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of a Highly Efficient SOFC Module Using Two‐stage Stacks and a Fuel Regeneration Process

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Several SOFCs-based combined heat and power plant (CHP) designs have been considered [1,2]. Solutions proposed in the literature assume higher fuel utilization level through recirculation of depleted anodic fuel [3][4][5][6] or a serial connection of two identical cell stacks [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…The connection of two stacks in series increases the output power of the system due to utilization of lean fuel from the first stack in the second one. This solution has been proposed recently by Kupecki et al [1]. A micro-Combined Heat and Power, CHP, unit with two 30 SOFC cells serially connected integrated in stack modules was investigated experimentally and numerically.…”

Section: Introductionmentioning

confidence: 99%

“…A micro-Combined Heat and Power, CHP, unit with two 30 SOFC cells serially connected integrated in stack modules was investigated experimentally and numerically. Kupecki et al [1] enclosed the steam reformer and post combustor in a well-insulated high temperature box to achieve high thermal integration of the fuel process and post-combustor assuring heat delivery for the endothermic process of steam fuel reforming. Instantaneous evaporation inside the fuel processor resolved the problem of stand-alone steam generation.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the electrical efficiency of the system with two in-series SOFC stacks was 3-7% points higher than in systems based on the parallel connection of two stacks, when recirculation of the anodic gases was involved. According to Kupecki et al [1] optimization of the system performance was associated with defining parameters, which allowed them to maximize the performance of the SOFC stacks. Rapid changes in performance was observed when the first stack operated at constant current density and the current density of the second stack was gradually increased.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic Analysis of Load Operations of Two-Stage SOFC Stacks Power Generation System

Pianko‐Oprych

Hosseini

2017

Energies

View full text Add to dashboard Cite

Abstract:The main purpose of this paper was to develop a complete dynamic model of a power generation system based on two serially connected solid oxide fuel cell stacks. The uniqueness of this study lies in a different number of fuel cells in the stacks. The model consists of the electrochemical model, mass and energy balance equations implemented in MATLAB Simulink environment. Particular attention has been paid to the analysis of the transient response of the reformers, fuel cells and the burner. The dynamic behavior of the system during transient conditions was investigated by load step changing. The model evaluates electrical and thermal responses of the system at variable drawn current. It was found that a decrease of 40% in the 1st stage and 2nd solid oxide fuel cell (SOFC) stacks drawn current caused both stacks temperature to drop by 2%. An increase of the cell voltage for the 1st and 2nd SOFC stacks led to very fast steam reformer response combined with a slight decrease in reformer temperature, while a considerable burner temperature increase of 70 K can be observed. Predictions of the model provide the basic insight into the operation of the power generation-based SOFC system during various transients and support its further design modifications.

show abstract

Design and fabrication of novel interconnectors for solid oxide fuel cells via rubber pad forming

Timurkutluk

Onbilgin

2020

Int J Energy Res

View full text Add to dashboard Cite

Experimental and numerical analysis of a serial connection of two SOFC stacks in a micro-CHP system fed by biogas

Cited by 58 publications

References 13 publications

Development of a Highly Efficient SOFC Module Using Two‐stage Stacks and a Fuel Regeneration Process

Development of a Highly Efficient SOFC Module Using Two‐stage Stacks and a Fuel Regeneration Process

Dynamic Analysis of Load Operations of Two-Stage SOFC Stacks Power Generation System

Design and fabrication of novel interconnectors for solid oxide fuel cells via rubber pad forming

Contact Info

Product

Resources

About