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컴팩트 석탄 가스화기 개발을 위한 이중선회버너 운전 평가
강석환,류재홍,정석우,정우현,유상오,이도연,윤용승,이진욱,김규태,이민회,Kang, Suk-Hwan,Ryu, Jae-Hong,Chung, Seok-Woo,Jung, Woo-Hyun,Yoo, Sang-Oh,Lee, Do-Yeon,Yun, Yongseung,Lee, Jin-Wook,Kim, Gyoo-Tae,Yi, Min-Hoe 한국에너지학회 2013 에너지공학 Vol.22 No.2
석탄가스화 기술은 청정석탄에너지 기술 중에서 아주 중요한 대안으로 인식되고 있으며, 이에 전 세계적으로 차세대 석탄가스화기라고 할 수 있는 고효율 저비용 석탄가스화기를 개발하고 있다. 본 연구에서도 이러한 목적의 달성을 위하여 저비용으로 구현이 가능한 컴팩트 석탄가스화기를 개발하고 있으며, 다수개의 공급부로 이루어진 일체형 이중선회형 버너를 개발하였다. 개발된 버너의 가스화 운전조건을 확보하기 위하여 미분탄 분배기와 함께 기존의 석탄가스화기 몸체에 설치하여 가스화 실험을 수행하였다. 인도네시아산 아역청탄인 ABK 탄을 사용하여 1.5톤/일의 파일럿 규모로 $6.4{\sim}7.2kg/cm^2$, $1170{\sim}1300^{\circ}C$ 조건에서 운전을 수행하였다. 우선 성능평가보다는 안정적인 가스화기 운전조건을 확보하는데 중점을 두었다. 그 결과, 안정적인 운전조건에서 탄소전환율은 84.0%, 냉가스 효율 52.1%를 확보할 수 있었다. Coal gasification is considered as one of the best alternatives among clean coal technology and new concept next generation technologies are under being developed to achieve low cost as well as high efficiency. In this study we have developed double swirl multi-burner as part of the development of low cost compact gasifier. We installed new concept multi-burner with pulverized coal distributor to the body of existing gasifier for burner test. Gasification test was performed under the condition of $6.4{\sim}7.2kg/cm^2$ and $1170{\sim}1300^{\circ}C$ by using Indonesian ABK (sub-bituminous) coal to get operation condition of new concept multi-burner. Our interest was focused to ensure a stable operating condition rather than the gasifier performance evaluation. As a result, we were able to achieve the carbon conversion of 84% and the cold gas efficiency of 52.1% at the stable operating conditions.
홍진표(Hong, Jin-Pyo),정재화(Chung, Jae-Hwa),서석빈(Seo, Seok-Bin),지준화(Chi, Jun-Hwa),이승종(Lee, Seung-Jun),정석우(Chung, Suk-Woo) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
Integrated Gasification Combined Cycle (IGCC) power plant converts coal to syngas, which is mainly composed with hydrogen and carbon monoxide, by the gasification process and produces electric power by the gas and steam turbine combined cycle power plant. The purpose of this study is to investigate the influence of gasification process to type and structure of gasifier. For this purpose, the performance characteristics of gasification reaction are analyzed with the operation characteristic of pilot-scale 2-stage coal gasifier. It is found that gasification reaction, floating characteristic of melted slag, particle stick of inside of the gasifier, particle stick and deposit of Syngas cooler are the causes in the different performance characteristics.
윤종혁(Jonghyuk Yoon),송형운(Hyoungwoon Song),정희숙(Jung Hee Suk),정석우(Seok Woo Chung) 한국열환경공학회 2019 한국열환경공학회 학술대회지 Vol.2019 No.춘계
Recently, there are lots of increasing interest in smart farming that represents application of modern Information and Communication Technologies (ICT) into agriculture. In order to obtain optimal geometry of smart greenhouse, various design parameters need to be evaluated. In the present study, the numerical simulation using a commercial Computational Fluid Dynamics (CFD) code was implemented to figure out the internal thermal-flow characteristics. In order to numerically model solar radiation that spread over a wide range of wavelengths, the multiband model that discretizes the spectrum into finite bands of wavelength based on Wien’s law is applied to the simulation. In addition, absorption coefficient of vinyl that is varied with the bands of wavelength is also applied based on Beer-lambert law. To validate the numerical method, the numerical results of the temperature at specific monitoring points were compared with the experimental data. The average error rates (12.2~14.2 %) between them was shown and numerical results are in good agreement with the experimental data. Additionally, effect of shape of roof windows on thermal-flow characteristics inside single-span green house was evaluated. The results of the present study can be useful information for the design of various greenhouses.