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이용운(Yong-Woon Lee),예인수(In-Soo Ye),이명일(Ming-Ri Li),홍재현(Jae-Hyeon Hong),오정근(Jeong-Geun Oh),이웅진(Ung-Jin Lee),류창국(Chang-Kook Ryu) 한국연소학회 2010 KOSCOSYMPOSIUM논문집 Vol.- No.40
Wood pellet is a densified fuel with homogeneous physical properties suitable for use in various scales of domestic and industrial furnaces. A wood pellet stove is a small-scale furnace for domestic heat production, which can replace the conventional oil or gas boilers. Since the fuel properties of wood pellet is very different from oil or gas, the design of a wood pellet stove requires profound understanding on the solid fuel combustion as well as gas flow mixing/reactions. Due to the size limit of the furnace height (~1m) for domestic installation, poor design of furnace, air supply and heat exchanger may lead to excessive emission of CO or low energy efficiencies. This study evaluated the design of an existing wood pellet stove with 30,000 ㎉/hr capacity using experimental and computational techniques in order to optimize the furnace design. The results show that it is critical to minimize the unused furnace volume and to enhance the gaseous mixing for reduced CO emission.
음푸른별(Pu-Reun-Byul Eum),예인수(In-Soo Ye),류창국(Changkook Ryu),문지홍(Ji Hong Moon),방병열(Byung Ryeol Bang),이은도(Uen Do Lee) 한국연소학회 2010 KOSCOSYMPOSIUM논문집 Vol.- No.40
Pyrolysis thermally decomposes lignocellulosic materials into tar vapor and gases leaving the carbonaceous solid residue (char). Although numerous studies have been reported for this key process of biomass thermal conversion, pyrolysis remains as the most complicated phenomena due to the complexity associated with the structural changes, a large number of compounds generated and their secondary reactions. One difficulty in biomass studies is the gap between the analytical characterization using a thermogravimetric analyzer (TGA) and pyrolysis of actual large particles. This paper reports a preliminary study on the effect of particle size in pyrolysis using wood pellets. The pyrolytic mass loss curve from a TGA with fine sawdust and a thermobalance with large pellets were compared, and the difference was discussed using prediction of heat transfer rates. Further study is required on detailed product characterization including the tar and gases for various particle sizes.
3기 신도시 도시건축통합계획의 도시구상 및 계획 특성에 대한 비교 분석 연구 - <과천과천>, <안산신길2>, <수원당수2> 시범지구를 중심으로 -
이예인(Lee, Ye-In),한지형(Han, Ji-Houng) 대한건축학회 2022 대한건축학회 학술발표대회 논문집 Vol.42 No.2
The purpose of this study is to understand the overall design process and present the direction of a more concrete and developed urban architecture integration plan by analyzing urban planning and planning characteristics, understanding the process and establishing concepts. Based on this, it is expected that more advanced urban architecture integration plans will be applied in other new cities and established cities in the future by understanding the design concept of pursuing a street-centered shared city.