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Bi<sub>0.48</sub>Sb<sub>1.52</sub>Te<sub>3</sub>의 열전특성에 대한 Pb 도핑 영향
문승필,김태완,김성웅,전우민,김진헌,이규형,Moon, Seung Pil,Kim, Tae Wan,Kim, Sung Wng,Jeon, Woo Min,Kim, Jin Heon,Lee, Kyu Hyoung 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.7
$Bi_2Te_3$-based alloys have been intensively investigated as active materials for thermoelectric power generation devices from low-temperature (< $250^{\circ}C$) waste heat. In the present study, we fabricated Pb-doped, p-type $Bi_{0.48}Sb_{1.52}Te_3$ polycrystalline bulks by using meltsolidification and spark plasma sintering techniques, and evaluated their thermoelectric transport properties in an effort to develop optimized composition for low-temperature power generation applications. The electronic and thermal transport properties of $Bi_{0.48}Sb_{1.52}Te_3$ could be manipulated by Pb doping. As a result, the temperature for a peak thermoelectric performance (zT) gradually shifted toward higher temperatures with Pb content, suggesting that thermoelectric power generation efficiency can be enhanced by controlled Pb doping.
전압안정도를 고려한 확률론적 도달전력 산정에 관한 연구
문승필(Seung-pil Moon),장병훈(Byung-hoon Chang),이재걸(Jaegul Lee),최재석(Jaeseok Choi) 대한전기학회 2010 전기학회논문지 Vol.59 No.8
Purpose of the electric power system planning and operation is to supply the electric energy to customers continuously and economically. With the mutual exclusive laws of nature between reliability and economic, finding the meeting point is very important but not easy. Commonly the probabilistic reliability indices of the electric power systems are represented with negatively. And the effectiveness of FACTS on the probabilistic reliability could not be reflected with common methods. In this paper, a method to evaluate the probabilistic arrival power at each load point is presented. With this new proposed method, probabilistic reserve margin at load points can be calculated and which can be used with positive reliability index also. Using the P-V analysis, the voltage stability is considered in reliability evaluation. It is expected that the proposed method will be useful expecially in reliability evaluation of electric power system which has voltage restriction.