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- 저자 : Petrakopoulou, Fontina (검색결과 2 건)
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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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Konstantinos Stamatiou,Nikolaos Galariotis,Ioannis Michailidis,Nerantzoula Petrakopoulou,Helen Moustou,Adamantia Zizi-Sermpetzoglou 대한비뇨의학회 2010 Investigative and Clinical Urology Vol.51 No.10
Sarcomatoid carcinoma (SC) of urinary bladder is a rare tumor exhibiting aggressive behavior. Here we are reviewing the pathologic and clinical characteristics of 4 consecutive cases of this rare tumor. Three out of 4 patients were males and one female. The median age was 72.8 years (range, 60-79 years). Patients underwent transurethral resection of bladder tumor and the diagnosis of bladder SC was established on the pathologic examination of the resected bladder tissue. Despite treatment all patients died within 22 months of the diagnosis of SC. SC of the bladder are true biphasic malignant neoplasm exhibiting morphologic and immunohistochemical evidence of epithelial and mesenchymal differentiation with the presence or absence of heterologous elements. The aggressive of the tumor precludes radical therapy whenever possible, since adjuvant therapy seems to have little effect.
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