• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2003.05a
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• pp.621-625
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• 2003

최근 지구온난화 문제와 관련하여 국제적으로 이슈가 되고 있는 $CO_2$ 저감 및 처리기술 중에서 연소 후 처리가 아닌 신개념 연소기술로서 NO$_{x}$가 배출되지 않고 $CO_2$의 고농도 원천분리가 가능하여 새로운 연소 및 발전기술로 부상하고 있는 매체순환식 가스연소기술(Chemical-Looping Combustion Technology, CLC)에 대한 연구가 국내외적으로 활발하게 진행되고 있다.(중략)

• Journal of the Korean Society of Combustion
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• v.17 no.3
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• pp.30-45
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• 2012

An existing unit of power plant is considered to refurbish it for possible application of carbon capture and storage(CCS). Conceptual design of the plant includes basic considerations on the national and international situation of energy use, environmental concerns, required budget, and time schedule as well as the engineering concept of the plant. While major equipment of the recently upgraded power plant is going to be reused, a new boiler for air-oxy fired dual mode operation is to be designed. Cryogenic air separation unit is considered for optimized capacity, and combustion system accommodates flue gas recirculation with multiple cleaning and humidity removal units. The flue gas is purified for carbon dioxide separation and treatment. This paper presents the background of the project, participants, and industrial background. Proposed concept of the plant operation is discussed for the possible considerations on the engineering designs.

• Journal of The Korean Association For Science Education
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• v.28 no.8
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• pp.779-785
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• 2008

In this study, we investigated the role of a discrepant event from both cognitive and motivational perspectives in learning the concept of combustion. A preconception test, a test of response to a discrepant event, and a situational interest questionnaire were administered to 433 eighth graders. After learning the concept of combustion, the tests of attention, effort, and conceptual understanding were administered as post-tests. The reponses of 208 students who had been found to possess the target misconception were analyzed. The percentages of rejection and exclusion responses were relatively high compared to the previous studies about density concept, whereas a proportion of belief change was low. The results of the path analysis indicated that situational interest after presenting an alternative hypothesis had a direct effect and an indirect effect via attention and effort on conceptual understanding. Situational interest induced by a discrepant event directly influenced cognitive conflict after presenting an alternative hypothesis.

• Journal of the KSME
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• v.34 no.8
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• pp.632-642
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• 1994

이 글의 앞부분에서는 소각로 관련 선진기술 중에서 소각 연소실부분에 대한 내용을 검토하고, 저공해화를 위한 연소실을 설계할 때 고려해야 할 인자들을 도출한다. 이러한 설계인자들에 대한 정량적인 평가는 설계개념 확인 및 설계인자의 검토를 위한 연소, 유동, 열전달 등 실험실 규모의 실험과 열유동의 전산해석 기법을 활용하여 설계변수의 최적화를 통해 이루어진다. 이 글에서는 컴퓨터. 프로그램을 사용하는 전산유동해석, 축소 모형장치를 사용하는 실험 등 열유동 해석법과 고형 폐기물의 연소특성을 분석하는 실험적.이론적 접근법을 소개한다.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2002.05a
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• pp.173-177
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• 2002

두 개의 유동층 사이를 순환하는 금속매체(Metal or Metal oxide)를 이용하여 공기에 의한 금속매체의 산화와 기체연료(H$_2$, CO, CH$_4$등)에 의한 금속산화물의 환원반응이 별개의 반응기에서 일어나게 하는 새로운 개념의 연소기술인 매체순환식 가스연소기술은 공기와 기체연료를 직접 접촉시켜 반응하는 기존의 가스연소기에 비해 많은 장점을 가지고 있다.(중략)

• Transactions of the Korean Society of Mechanical Engineers B
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• v.34 no.7
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• pp.679-688
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• 2010

The major objective of the present study is to extend the applications of inverse analysis to more realistic engineering fields with a complex combustion process rather than the traditional simple heat-transfer problems. In order to do this, the unknown initial mass fractions of $CH_4/O_2$ are estimated from the temperature measurement data by inverse analysis in the practical diffusion-controlled turbulent combustion problem. In order to ensure efficient inverse analysis, the repulsive particle swarm optimization (RPSO) method, which belongs to the class of stochastic evolutionary global optimization methods, is implemented as an inverse solver. Based on this study, it is expected that useful information can be obtained when inverse analysis is used in the diagnosis, design, or optimization of real combustion systems involving unknown parameters.

• Resources Recycling
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• v.15 no.1 s.69
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• pp.58-65
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• 2006

A new technology for refused derive fuel(RDF) utilization in circulating fluidized bed is under development. The RDF is tested in a bench scale circulating fluidized bed(CFB) combustor and its burning characteristics were investigated and collected as design parameters. The combustions were controllable and the HCl emission which is most important toxic emission were below 150 ppm at the exit of the combustor. The differences between conventional coal homing circulating fluidized bed boiler and the exclusive RDF boiler were studied and commercial scale co-generation CFB for RDF was designed.

• Proceedings of the Korean Institute of Resources Recycling Conference
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• 2005.10a
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• pp.124-134
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• 2005

A new technology for refused derive fuel(RDF) utilization in circulating fluidized bed is under development. The RDF is tested in a bench scale circulating fluidized bed(CFB) combustor and it's burning characteristics were investigated and collected as design parameters. The combustions were controllable and the HCl emission which is most important toxic emission were below 150ppm out of combustor. The differences between conventional coal burning circulating fluidized bed boiler and the exclusive RDF boiler were studied and commercial scale co-generation RDF CFB's were designed.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2012.05a
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• pp.484-488
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• 2012

Korea Aerospace Research Institute (KARI) performed the conceptual design of rocket engine test facility for the development and qualification of the 3rd stage liquid rocket engine for KSLV-II. The 3rd stage rocket engine test facility, which are to be constructed at Naro Space Center, will supply propellants and high-pressure gases to engine for firing test at ground and altitude conditions. The altitude test condition is obtained using a supersonic diffuser operated by the self-ejecting jet from the liquid rocket engine.

• Journal of Energy Engineering
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• v.12 no.4
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• pp.289-301
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• 2003

To develop a chemical-looping combustion technology, conceptual design of 50 kW thermal chemical-looping combustor, which is composed of two interconnected pressurized circulating fluidized beds, was performed by means of mass and energy balance calculations. A riser type fast fluidized bed was selected as an oxidizer and a bubbling fluidized bed was selected as a reducer by mass balance for the chemical-looping combustor. Calculated values of bed mass, solid circulation flux, and reactor dimension by mass and energy balance calculations were suitable for construction and operation of chemical-looping combustor. It is concluded from the comparison of the design results and operating values of commercial circulating fluidized bed that the process outline is realistic. Moreover, the previous results support that oxygen carrier particle, NiO/bentonite, fulfills the conversion rates needed for the proposed design. The effects of system capacity, metal oxide content in a oxygen carrier particle, amount of steam input, gas velocity, and solid depth on design values were investigated and the changes in the system performance can be estimated by proposed design tool.