• 제목/요약/키워드: Regenerative combustion system

검색결과 40건 처리시간 0.022초

compact 축열 버너 개발 연구 (A Study on the Compact Regenerative Burner Development)

  • 동상근;이은경;양제복
    • 한국연소학회:학술대회논문집
    • /
    • 한국연소학회 2004년도 제28회 KOSCO SYMPOSIUM 논문집
    • /
    • pp.248-255
    • /
    • 2004
  • For the compactness of regenerative combustion, self regenerative combustion and embedding regenerator inside furnace are proposed. The Self Regenerative burner system was developed to enhance thermal efficiency and Low Nox emission. In the twin regenerative system, two burner heads are generally used for preheating and exhausting combustion mode. But self regenerative burner system use only single nozzle body for regenerative combustion. Also two kind of regenerator, internal and external type, were designed to operate conveniently in both large and small furnace. According to test result, the self regenerative combustion system gives strong internal exhaust gas recirculation that reduce NOx emission significantly. NOx was measured as 50ppm(5% O2, 1290C furnace temperature). Also it is found that the fuel saving rate due to the self regenerative burner system reach to 30-40%. Thus it can be concluded that self regenerative mild combustion system appears to provide a reasonable regenerative burner for compactness and high performance as compared with conventional twin regenerative burner system. Also in the RT Application , compact twin regenerative burner was developed with the help of embedding regenerator inside furnace.

  • PDF

축열식 고온공기 연소시스템에 대한 실험적 연구 (Experimental Study on High Temperature Air Regenerative Combustion System)

  • 양병옥;임인권
    • 한국연소학회:학술대회논문집
    • /
    • 한국연소학회 1999년도 제19회 KOSCO SYMPOSIUM 논문집
    • /
    • pp.189-200
    • /
    • 1999
  • Combustion characteristics of a regenerative combustor for high temperature air combustion have experimentally studied. Temperature measurement on regenerative ceramic material and combustor has been carried out with changing equivalence ratio at constant turn-over period. Stable and unstable combustion region have been found and also detailed averaged temperature profile with respect to various air flow conditions have been obtained.

  • PDF

순산소 축열 연소시스템에서의 설계 파라미터에 관한 연구 (Parametric Study of Regenerative System with Oxy-Fuel Combustion)

  • 홍성국;노동순;이은경
    • 한국연소학회:학술대회논문집
    • /
    • 한국연소학회 2013년도 제46회 KOSCO SYMPOSIUM 초록집
    • /
    • pp.13-14
    • /
    • 2013
  • The aim of this study is to investigate the parametric characteristics on regenerative system with oxy-fuel combustion by experiment. Regenerative system with a pair of oxygen burners and regenerators is used for evaluating regenerator characteristics according to design parameters such as ball (regenerator medium) size, regenerator weight, and bypass of exhaust gas. The temperature profiles with time are varied by ball size and regenerator weight. The bypass of exhaust gas shows that the heat recovery ratio increases while the regenerating temperature efficiency slightly decreases.

  • PDF

자기축열식 저 NOx 연소기에서 배가스 재순환이 연소특성에 미치는 영향 (The Effect of Flue-gas Recirculation on Combustion Characteristics of Self Regenerative Low NOx Burner)

  • 강민욱;김종규;동상근;윤영빈
    • 한국연소학회지
    • /
    • 제8권1호
    • /
    • pp.17-24
    • /
    • 2003
  • The conventional regenerative system has a high thermal efficiency as well as energy saving using the high preheated combustion air. in spite of these advantages, it can not avoid high nitric oxide emissions. Recently, flameless combustion has received much attention to solve these problems. In this research, numerical analysis is performed for flow-combustion phenomena in the self regenerative burner. In this analysis we used Fluent 6.0 code. the that is developed for commercial use, Methane gas is used as a fuel and two-step reaction model for methane and Zeldovich mechanism for NO generation are used. the velocity of the preheated combustion air is used as a parameter and we analyze the characteristics of flow-field, temperature distributions and NO emissions. Due to the increased recirculation rate, the maximum temperature of flame is significantly increased and NOx emissions is reduced.

  • PDF

순산소 연소용 축열시스템 내에서의 열 유동 수치해석 (A NUMERICAL STUDY ON THE HEAT AND FLUID FLOW IN A REGENERATIVE OXY-FUEL COMBUSTION SYSTEM)

  • 강관구;홍성국;노동순;유홍선
    • 한국전산유체공학회지
    • /
    • 제18권3호
    • /
    • pp.1-7
    • /
    • 2013
  • A pure oxygen combustion technology is crucial in Carbon Capture and Storage (CCS) technology especially in capturing of $CO_2$, where CCS will reduce 9 $GtCO_2$ by 2050, which is 19% of the total $CO_2$ reduction amount. To make pure oxygen combustion feasible, a regenerative system is required to enhance the efficiency of pure oxygen combustion system. However, an existing air combustion technology is not directly applicable due to the absence of nitrogen that occupies the 78% of air. This study, therefore, investigates the heat and fluid flow in a regenerative system for pure oxygen combustion by using commercial CFD software, FLUENT. Our regenerative system is composed of aluminium packed spheres. The effect of the amount of packed spheres in regenerator and the effect of presence or absence of a bypass of exhaust gas are investigated. The more thermal mass in regenerator makes the steady-state time longer and temperature variation between heating and regenerating cycle smaller. In the case of absence of bypass, the regenerator saturates because of enthalpy imbalance between exhaust gas and oxygen. We find that 40% of exhaust gas is to be bypassed to prevent the saturation of regenerator.

축열식 저 NOx 연소기의 배가스 재순환이 연소특성에 미치는 영향 (The effect of flue-gas recirculation on combustion characteristics of regenerative low NOx burner)

  • 강민욱;윤영빈;동상근
    • 한국연소학회:학술대회논문집
    • /
    • 한국연소학회 2002년도 제25회 KOSCI SYMPOSIUM 논문집
    • /
    • pp.97-104
    • /
    • 2002
  • The conventional regenerative system has a high thermal efficiency as well as energy saving using the high preheated combustion air. in spite of these advantages, it can not avoid high nitric oxide emissions. Recently, flameless combustion has received much attention to solve these problems. In this research, numerical analysis is performed for flow-combustion phenomena in the self regenerative burner. In this analysis we used Fluent 6.0 code. the that is developed for commercial use, Methane gas is used as a fuel and two-step reaction model for methane and Zeldovich mechanism for NO generation are used. the velocity of the preheated combustion air is used as a parameter and we analyze the characteristics of flow-field, temperature distributions and NO emissions. Due to the increased recirculation rate, the maximum temperature of flame is significantly increased and NOx emissions is reduced

  • PDF

재생냉각시스템의 성능예측기법에 관한 실험적 연구 (An Experimental Study on the Performance Prediction Logic for a Regenerative Cooling System)

  • 정세용;이양석
    • 한국군사과학기술학회지
    • /
    • 제12권3호
    • /
    • pp.396-405
    • /
    • 2009
  • The experimental research was conducted to setup a performance prediction logic for the regenerative cooling system on a small scale liquid rocket engine using kerosene and LOX. Total heat flux of the combustion gas side was determined for the flow rate of the coolant, combustion pressure using the calorimeter thrust chamber. Based on the experimental investigation, a performance prediction scheme for the regenerative cooling system is setup in our own way. A performance prediction logic for the regenerative cooling system has been developed by the correction scheme of the combustion gas side. The key parameters determining the temperature limitation of the coolant are the mass flow rate of the coolant and the length of the combustion chamber and the nozzle. And the parameters to control the limitation of the usable wall temperature are the number of channels and wall thickness.

축열 연소시스템의 최적화 구현을 위한 사용자 전용 해석 프로그램의 개발 (The Development of User Oriented CFD Program for Optimum Design of a Regenerative Combustion Furnace)

  • 강관구;유수열;유홍선;김혁주;노동순
    • 열처리공학회지
    • /
    • 제16권3호
    • /
    • pp.148-158
    • /
    • 2003
  • In this study, a user oriented CFD program for optimum design of a regenerative combustion furnace, REBURN was developed. For user's convenience, user friendly Graphic User Interface was made and the renumbering interface program was developed in order to directly input any generated mesh system from ICEM CFD/FEA. Also an automatic processing system for switching mode was developed. The program was verified through compahng with commercial CFD code about regenerative combustion furnace. Then, numerical simulation of real walking beam furnace used in real industry was performed and the parametric analysis was studied about the arrangement mode. As a results, the uniform temperature was appeared in the cross mode.

공업로용 무화염식 축열버너의 국산화 개발 (The Development of Flameless Regenerative Burner for the Industrial Furnaces)

  • 김원배;양제복
    • 한국연소학회지
    • /
    • 제15권2호
    • /
    • pp.27-33
    • /
    • 2010
  • Recently, much attention has been paid to utilizing highly preheated air up to $1,000^{\circ}C$ through waste gas in industrial furnaces. The regenerative burner technology has shown to provide significant reduction in energy consumption (up to 60%), downsizing of the equipment (about 30%) and lower emissions (about 30%) while maintaining high thermal performance of the system since 2000. The object of this study is to develop the flameless regenerative burner for industrial furnaces based on the FLOX(Flameless Oxidation) principle and it has been designed and manufactured as pilot scale. Performance tests are experimentally done and their results are discussed. They showed 1) a very good uniformity in temperature distribution, 2) about 100 ppm in NOx at the temperature $1,300^{\circ}C$, 3) about 95% in temperature efficiency. Besides, the regenerative burner has advantage in easy maintenance and high usage rate of regenerator due to the separate and portable type of heat exchanger.

환경친화적 산업용 신연소기술 (Environmentally Friendly Industrial Combustion Technologies)

  • 노동순
    • 한국가시화정보학회지
    • /
    • 제2권1호
    • /
    • pp.3-7
    • /
    • 2004
  • Two novel industrial combustion technologies are introduced. High temperature air regenerative combustion for industrial heating system and oxyfuel combustion for power plant are considered as a energy saving and $CO_{2}$ emission reducing combustion technology. Research works are necessary to understand fundamental phenomena and to develope application technologies to industrial sector.

  • PDF