Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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Characteristics of Combustion and Thermal Efficiency for Premixed Flat Plate Burner Using a Porous Media

다공성 소재 종류에 따른 예혼합 평판버너의 연소 및 열효율 특성에 관한 연구

  • Kum, Sungmin (School of Mechanical and Automotive Engineering, Halla University) ;
  • Yu, Byeonghun (School of Mechanical Engineering, Inha University) ;
  • Lee, Chang-Eon (School of Mechanical Engineering, Inha University) ;
  • Lee, Seungro (School of Mechanical Engineering, Inha University)
  • 금성민 (한라대학교 기계자동차공학부) ;
  • 유병훈 (인하대학교 기계공학과) ;
  • 이창언 (인하대학교 기계공학과) ;
  • 이승로 (인하대학교 기계공학과)
  • Received : 2012.09.20
  • Accepted : 2012.12.01
  • Published : 2012.12.31
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Abstract

The purpose of this study is investigated on the combustion and the thermal characteristics of porous media burners which are many using for a condensing boiler recently. In addition, results of this study will be used the fundamental information to decide the burner type which will be applied to the future development of EGR(Exhaust gas recirculation) condensing boiler. Two flat type of burners made of a the metal fiber(MF) and the ceramic(CM) were selected and examined, experimentally. As experimental results, the emitted CO concentration of CM was higher than that of MF. However, the NO concentration of MF was higher than that of CM. The efficiencies of both burners were increased as increasing the burner capacity. While the efficiency of MF was higher than that of CM, regardless of the burner capacity. In the experimental range, MF is appropriated for the burner material and 0.8 of equivalence ratio is an optimal operation condition, regarding of the proportional control, the thermal efficiency and emitted NO and CO concentration based on the regulations of KS B standard and EN 677 standard.

본 연구는 현재 콘덴싱 보일러에 많이 사용하는 다공성 소재중에서 메탈화이버(metal fiber, MF) 및 세라믹(ceramic, CM)으로 제작한 평판형 버너에 대해 연소 및 열특성을 비교 검토하고 그 결과를 향후 개발할 EGR(Exhaust gas recirculation) 콘덴싱 보일러에 적용할 버너 선정의 기초자료로 활용하는 것을 목적으로 한다. CO 배출량은 CM이 MF보다 높았고 NOx 배출량은 MF가 CM보다 높게 나타났다. 버너열량 변화시에는 버너열량이 클수록 효율이 높게 나타났으며 버너 소재별 열효율은 버너열량 변화와 관계없이 MF가 CM보다 높게 나타났다. 본 실험범위에서 KS B 기준과 EN 677기준을 근거로 비례제어, 열효율, CO 및 NOx 배출량을 고려할 때 버너 소재는 MF가 적절하며 당량비는 0.8일때가 최적 운전조건으로 판단된다.

Keywords

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