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석탄화력 발전용 순환유동층 보일러 내 고온 증기부 운전의 동특성 이해와 응용
이후경(Hookyung Lee),김효준(Hyojun Kim),김영운(Youngoon Kim),이기현(Kihyun Lee) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
In a thermal plant for power generation, transient behavior caused by load changes is largely controlled by a firing rate of fuel and a feeding rate of water. Different time constants in the boiler system which is composed of the complex configuration of heating surfaces lead considerable response time. The CFB boiler is one of the alternatives for environmental regulations aimed at controlling air emissions at coal-fired power plants. According to the previous presentation results associated with air/gas side in the CFB furnace, this paper reports dynamic simulation and analysis results for thermal process design of water/steam side in the back-pass part of the CFB boiler. The deviation between simulated results and design values is acceptable in engineering application. Finally, the CFB boiler module will be connected on the computational domain of our own dynamic plant simulation tool. It may provide strong support for the furnace and back-pass design in ultra-supercritical CFB boiler system ultimately.
탄소중립을 위한 암모니아 연소기술의 연구개발 필요성 - Part Ⅱ 연구개발 동향과 기술적 타당성 분석
이후경(Hookyung Lee),우영민(Youngmin Woo),이민정(Min Jung Lee) 한국연소학회 2021 한국연소학회지 Vol.26 No.1
Following the previously published Part 1, the Part 2 focuses on the basic combustion characteristics of fuel ammonia and research cases of applied combustion technology. In addition, we would like to review the items necessary for a large-scale demonstration of ammonia combustion technology. Most of the technologies for utilizing ammonia combustion are being carried out in Japan and are strongly promoted by policy. The results give a method of stabilizing flame and reducing nitrogen oxides when mixed burning of ammonia, and are applied to automobile engine, marine engine, gas turbine, coal-fired boiler, reheating furnace, and fuel cell. The co-burning rate, which is advantageous for stabilizing combustion and reducing nitrogen oxides, has been derived, and accordingly, the use of ammonia as a carbon-free fuel for the future is brightly expected.
탄소중립을 위한 암모니아 연소기술의 연구개발 필요성 - Part Ⅰ 연료 암모니아의 보급확대 배경과 경제성
이후경(Hookyung Lee),우영민(Youngmin Woo),이민정(Min Jung Lee) 한국연소학회 2021 한국연소학회지 Vol.26 No.1
Along with a global carbon neutral basis, the development of combustion technologies for greenhouse gas reduction is essential. Transitional technologies that are easy to commercialize within a relatively short period of time are required for the reinforced environmental pollutant reduction regulations and fulfillment of the promise with the international community. As a carbon-free fuel, ammonia is expected to play a important role through hydrogen energy carriers and direct use technology. This paper examines the history of the energy and resource sectors up to the formation of a carbon-neutral system in Korea, and also investigates the necessity of using ammonia to advance to a hydrogen economy. In order to secure the technical feasibility of ammonia combustion, this article discusses related domestic and foreign policies, the current state of the life cycle technology development from fuel ammonia production process to utilization, the characteristics of fuel ammonia, and the possibility of application as a combustion technology. This paper is divided into two parts, and in Part 1, we will discuss the background and economic feasibility of expanding the supply of fuel ammonia.