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RISS 인기검색어
- 검색키워드
- 저자 : George Tsatsaronis (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Petrakopoulou, Fontina,Lee, Young Duk,Tsatsaronis, George Elsevier 2014 APPLIED ENERGY Vol.114 No.-
<P><B>Abstract</B></P> <P>The incorporation of fuel cells into power plants can enhance the operational efficiency and facilitate the separation and capture of emissions. In this paper a fuel-cell unit, consisting of solid-oxide fuel-cell stacks, a pre-reformer, and an afterburner is incorporated into a combined-cycle power plant with CO<SUB>2</SUB> capture. The thermodynamic performance of the plant is examined using an exergetic analysis and it is compared with a conventional combined-cycle power plant (reference plant) without CO<SUB>2</SUB> capture, as well as with other plants with CO<SUB>2</SUB> capture.</P> <P>The inefficiencies of the chemical reactions taking place in the fuel-cell unit are found to be the main source of exergy destruction among the plant components. However, the additional power generated in the fuel-cell stacks and the afterburner enhances the overall efficiency and compensates for the energy needed for the capture and compression of the carbon dioxide. When compared with the reference plant and with alternative capture technologies, the solid-oxide fuel-cell plant with CO<SUB>2</SUB> capture operates more efficiently and appears to be a thermodynamically promising approach for carbon capture.</P> <P><B>Highlights</B></P> <P> <UL> <LI> An exergetic analysis is used to identify the thermodynamic irreversibilities of a power plant. </LI> <LI> The plant includes a solid-oxide fuel-cell unit and CO<SUB>2</SUB> capture. </LI> <LI> Additional power generated in the fuel-cell unit enhances the power output of the plant. </LI> <LI> The power plant results in a high efficiency compared both to conventional and other CO<SUB>2</SUB> capture plants. </LI> <LI> High irreversibilities are found for the solid-oxide fuel cell. </LI> </UL> </P>
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Lee, Young Duk,Ahn, Kook Young,Morosuk, Tatiana,Tsatsaronis, George Elsevier 2015 ENERGY Vol.79 No.-
<P><B>Abstract</B></P> <P>The environmental impact associated with a SOFC (solid-oxide fuel-cell) power generation system has been assessed using a LCA (life cycle assessment) method. LCA is a technique assessing the environmental aspects associated with a system during its entire life cycle. To calculate the environmental impact of the analyzed system, a commercial software package, SimaPro version 7.3.3., was used; the ReCiPe method, endpoint approach, and the hierarchist's perspective were selected for calculating the values. The calculation results reveal that the manufacturing stage and the disposal stage have small contributions to the total environmental impact, which just cover 2.1%–9.5% and 0.1%–0.6% of the total, respectively, depending on the assumption made for the lifetime of the SOFC stack and the overall system. The SOFC stack is a dominant contributor to the environmental impact associated with manufacturing; 72% of the total environmental impact of manufacturing comes from the SOFC stack; the remaining balance-of-plant (BOP) components account for 28% of the total environmental impact. Options for reducing the overall environmental impact are presented.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Environmental impact analyses of an SOFC-based power generation system have been made. </LI> <LI> Analyses cover the manufacturing, operation, and disposal of the system during whole life cycle. </LI> <LI> Energy and material input data are updated, reflecting the current technological progress. </LI> <LI> Results reveal that the manufacturing and the disposal stage have small contributions to the total environmental impact. </LI> </UL> </P>
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Exergetic and exergoeconomic evaluation of an SOFC-Engine hybrid power generation system
Lee, Young Duk,Ahn, Kook Young,Morosuk, Tatiana,Tsatsaronis, George Elsevier 2018 ENERGY Vol.145 No.-
<P><B>Abstract</B></P> <P>An SOFC-Engine hybrid power generation system is evaluated using exergetic and exergoeconomic analysis methods to determine measures for improving its efficiency and cost effectiveness. The system is a combination of a solid oxide fuel cell (SOFC) and an internal combustion engine; the engine burns the anode offgas and produces additional power, thus improving the electrical efficiency of the overall system.</P> <P>The exergetic analysis, on the SOFC-Engine hybrid system, identifies the location, magnitude, and sources of thermodynamic inefficiencies (exergy destructions and exergy losses) in the system; the largest exergy destruction takes place within the internal combustion engine, followed by the heat exchangers, and the SOFC stack. Through the exergoeconomic analysis, the cost structure of the SOFC-Engine hybrid system is revealed, and the exergoeconomic factor of each component is quantified. The highest exergoeconomic factor of 93% is observed in the SOFC stack, implying that reducing the equipment cost of SOFC is of high importance to reduce the final product of the overall system. On the other hand, the fuel/water preheater shows the lowest exergoeconomic factor of 7%, meaning that improving its thermodynamic efficiency is more important for that component. Concerning the internal combustion engine, a well-balanced exergoeconomic factor of 52% is calculated.</P> <P><B>Highlights</B></P> <P> <UL> <LI> An SOFC-Engine hybrid system is analyzed using exergetic and exergoeconomic analyses. </LI> <LI> The SOFC-Engine hybrid shows the highest efficiency among all analyzed systems. </LI> <LI> The largest exergy destruction takes place on the internal combustion engine. </LI> <LI> Through the exergoeconomic analysis, measures for the cost reduction are suggested. </LI> </UL> </P>
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전과정 평가(Life Cycle Assessment)방법을 이용한 SOFC 열병합 발전시스템의 환경영향 분석
이영덕(Young Duk Lee),강상규(Sanggyu Kang),안국영(Kook Young Ahn),George Tsatsaronis 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
The environmental impact associated with a solid-oxide fuel-cell (SOFC) power generation system has been assessed using a life cycle assessment (LCA) method. LCA is a technique assessing the environmental aspects associated with a system during its entire life cycle. To calculate the environmental impact of the analyzed system, a commercial software package, SimaPro version 7.3.3., was used; the ReCiPe method, endpoint approach, and the hierarchists perspective were selected for calculating the values. The calculation results reveal that the manufacturing stage and the disposal stage have small contributions to the total environmental impact, which just cover 2.1% to 9.5% and 0.1% to 0.6% of the total, respectively, depending on the assumption made for the lifetime of the SOFC stack and the overall system. The SOFC stack is a dominant contributor to the environmental impact associated with manufacturing; 72% of the total environmental impact of manufacturing comes from the SOFC stack; the remaining balance-of-plant (BOP) components account for 28% of the total environmental impact.
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