Abstract
A comparative study on various solid oxide fuel cell (SOFC)-combined heat and power system layout designs is conducted to suggest its optimized structure. Thermodynamic models of a SOFC stack and balance of plant components are developed by using empirical correlations dependent on their design variables. 14 potential system layout designs are categorized by thermal integration methods through rigorous literature review and evaluated for their thermodynamic feasibility and performance by T-Q diagram analysis. Results show that preemptive air heating prior to combustion of stack exhaust gases or fuel heating is not thermodynamically feasible due to substantial heat transfer during air heating. Independent heat recuperation of the anode exhaust gas from a SOFC stack also shows thermodynamic non-viability given its low heat capacity rate. 4 effective layouts are selected and further investigated by proceeding detailed thermodynamic analysis. The system layout employing direct combustion just after the SOFC stack and branching of the hot gas stream (combustion gas) results in the pressure drop of 23.5 kPa and parasitic power of 1.04 kW (less than 5% of gross power). These are 2–4 times smaller than those of other layouts. Accordingly, the proposed layout provides the highest electrical efficiency of 55.5% and exergetic efficiency of 53.5%.
| Original language | English |
|---|---|
| Pages (from-to) | 351-368 |
| Number of pages | 18 |
| Journal | Energy Conversion and Management |
| Volume | 182 |
| DOIs | |
| Publication status | Published - 2019 Feb 15 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Nuclear Energy and Engineering
- Fuel Technology
- Energy Engineering and Power Technology
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Comparative study of solid oxide fuel cell-combined heat and power system designs for optimal thermal integration. / Park, Young Joon; Min, Gyubin; Hong, Jongsup.
In: Energy Conversion and Management, Vol. 182, 15.02.2019, p. 351-368.Research output: Contribution to journal › Article
TY - JOUR
T1 - Comparative study of solid oxide fuel cell-combined heat and power system designs for optimal thermal integration
AU - Park, Young Joon
AU - Min, Gyubin
AU - Hong, Jongsup
PY - 2019/2/15
Y1 - 2019/2/15
N2 - A comparative study on various solid oxide fuel cell (SOFC)-combined heat and power system layout designs is conducted to suggest its optimized structure. Thermodynamic models of a SOFC stack and balance of plant components are developed by using empirical correlations dependent on their design variables. 14 potential system layout designs are categorized by thermal integration methods through rigorous literature review and evaluated for their thermodynamic feasibility and performance by T-Q diagram analysis. Results show that preemptive air heating prior to combustion of stack exhaust gases or fuel heating is not thermodynamically feasible due to substantial heat transfer during air heating. Independent heat recuperation of the anode exhaust gas from a SOFC stack also shows thermodynamic non-viability given its low heat capacity rate. 4 effective layouts are selected and further investigated by proceeding detailed thermodynamic analysis. The system layout employing direct combustion just after the SOFC stack and branching of the hot gas stream (combustion gas) results in the pressure drop of 23.5 kPa and parasitic power of 1.04 kW (less than 5% of gross power). These are 2–4 times smaller than those of other layouts. Accordingly, the proposed layout provides the highest electrical efficiency of 55.5% and exergetic efficiency of 53.5%.
AB - A comparative study on various solid oxide fuel cell (SOFC)-combined heat and power system layout designs is conducted to suggest its optimized structure. Thermodynamic models of a SOFC stack and balance of plant components are developed by using empirical correlations dependent on their design variables. 14 potential system layout designs are categorized by thermal integration methods through rigorous literature review and evaluated for their thermodynamic feasibility and performance by T-Q diagram analysis. Results show that preemptive air heating prior to combustion of stack exhaust gases or fuel heating is not thermodynamically feasible due to substantial heat transfer during air heating. Independent heat recuperation of the anode exhaust gas from a SOFC stack also shows thermodynamic non-viability given its low heat capacity rate. 4 effective layouts are selected and further investigated by proceeding detailed thermodynamic analysis. The system layout employing direct combustion just after the SOFC stack and branching of the hot gas stream (combustion gas) results in the pressure drop of 23.5 kPa and parasitic power of 1.04 kW (less than 5% of gross power). These are 2–4 times smaller than those of other layouts. Accordingly, the proposed layout provides the highest electrical efficiency of 55.5% and exergetic efficiency of 53.5%.
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UR - http://www.scopus.com/inward/citedby.url?scp=85059455739&partnerID=8YFLogxK
U2 - 10.1016/j.enconman.2018.12.068
DO - 10.1016/j.enconman.2018.12.068
M3 - Article
AN - SCOPUS:85059455739
VL - 182
SP - 351
EP - 368
JO - Energy Conversion and Management
JF - Energy Conversion and Management
SN - 0196-8904
ER -