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°­ÁÂÀϽà 2013³â 5¿ù 13ÀÏ  ¿ÀÈÄ 17:00 ~ 18:30
°­Á Á¦¸ñ Thermoelectric Energy Harvesting and Cooling with Flexible Polymer Nanocomposites
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1. Á¦  ¸ñ : Thermoelectric Energy Harvesting and Cooling with Flexible Polymer Nanocomposites
2. ¿¬  »ç : À¯ÃæÈ£ ±³¼ö (Texas A&M University)
3. ÀÏ  ½Ã : 2013³â 05¿ù 13ÀÏ (¿ù) ¿ÀÈÄ 17:00 ~ 18:00
4. Àå  ¼Ò : ¼­¿ï´ëÇб³ ½Å°øÇаü(301µ¿) 117È£ ¼¼¹Ì³ª½Ç
5. ³»  ¿ë :

Abstract : Thermoelectric systems are very effective in solid state cooling and electricity harvesting from waste heat or heat sources with low temperature gradients relative to the environmental temperature.  Their simple leg-type structures, without moving parts, provide enormous advantages over conventional turbines, engines, and compressors.  In addition, their high energy density (per unit weight and volume) is ideal for mobile power sources and distribution systems. 
This seminar includes recent progress in new-class of organic thermoelectric materials, which can provide light-weight (higher power density), inexpensive, and non-toxic solutions for waste heat (i.e., energy) recovery or cooling.  Polymers are intrinsically poor thermal conductors, which makes them ideal for thermoelectrics, but low electrical conductivity and thermopower (or the Seebeck coefficient) have excluded them as feasible candidates in the past.  Our recent results, however, demonstrated that electrical properties of organic composites can be brought into degenerate semiconductor or metallic regimes by incorporating conductive nanoparticles without significantly changing thermal conductivity.  This talk includes material synthesis/characterization of such composites in addition to the details of our approach. 

6. ¾à  ·Â : Dr. Choongho Yu is currently an assistant professor in the department of mechanical engineering and materials science and engineering at Texas A&M University (College station, Texas, USA).  Prior to joining Texas A&M University in 2007, he spent three years in materials sciences division at Lawrence Berkeley National Laboratory and mechanical engineering at UC Berkeley in California.   He received his Ph.D. degree (2004) in mechanical engineering from the University of Texas at Austin.  His research closely related to the investigation of energy carrier transport and synthesis/characterization of nanostructured materials.  Specific topics include the development of organic/inorganic thermoelectric materials, thermal interface materials, nanostructured electrodes for Li-ion batteries, microbial fuel cells, MEMS/Bio-MEMS/NEMS sensors as well as the investigation of thermal transport in nanotubes/wires.

¹®  ÀÇ : ¸ÖƼ½ºÄÉÀÏ ¿¡³ÊÁö ½Ã½ºÅÛ ¿¬±¸´Ü ¿¬±¸Áö¿øº»ºÎ (¢Î 889-6669,6670)
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