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한승우(S. W. Han),최현주(H. J. Choi),김병일(B. I. Kim),김병민(B. M. Kim),김동호(D. H. Kim),김욱중(O. J. Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
In general a thermoelectric cooler (TEC) consists of a series of P type and N type thermoelectric materials sandwiched between two wafers. When a DC current passes through these materials, three different effects take place; Peltier effect, Joule heating effect and heat transfer by conduction due to temperature difference between hot and cold plates. In this study we have developed a micro TEC using Bi2Te3 (N type) and Bi0.5Sb1.5Te3 (P type) thin films. In order to improve that performance of a micro TEC, we made 10 um height TE legs using special PR only for lift-off. We measured COP (coefficient of performance) and temperature difference between hot and cold connectors with current.
최항석(H.S. Choi),김욱중(W.J. Kim),이정호(J.H. Lee),박준영(J.Y. Park),강명철(M.C. Kang),김석준(S.J. Kim) 한국연소학회 2008 KOSCOSYMPOSIUM논문집 Vol.- No.-
Recently, environmental and energy issues become a matter of primary concern in the inside and outside of the country. In particular, attention has been paid to the fields of energy generation, supplying and consuming, etc. One of them in individual household is a gas fired boiler, which is necessary for heating. The two important technical trends of it are high-efficiency and eco-friendly system so, in the present article, the techniques to accomplish this are reviewed for condensing gas fired boiler in the state of the art.