미세먼지 저감을 위한 30kW급 친환경 화목보일러의 성능평가 및 환경인증기준 설계 (Development of 30kW Eco-Friendly Wood Boiler and Design Certified Standard by Performance Evaluation for PM Reduction)

서지정보

· 발행기관 : 한국유체기계학회
· 수록지 정보 : 한국유체기계학회 논문집 / 26권 / 1호 / 40 ~ 49페이지
· 저자명 : 이형돈, 정만수

초록

The wood pellet industry for heating system has been a popular choice as an alternative to oil. Overseas research on firewood boilers is being steadily conducted, mainly in Europe. But locally, there is a need for further research and development for boilers using wood fuel (firewood) for setting environmental standards. In our study, a 30 kW class firewood boiler was developed and performance evaluation (combustion, environmental performance) was conducted. In addition, we designed an environmental certification standard (draft) suitable for the domestic situation by a standardized survey similar to those of domestic and foreign firewood boilers. After analyzing the combustion characteristics of firewood boilers, we have completed the design optimization of controlling more than 50% of the primary air damper and controlling the pyrolysis of heat in secondary air. As a result of analyzing the combustion characteristics for each fuel grade, it was confirmed that there was no significant difference from the EN303-5 quality standard, and the performance difference according to the fuel quality grade was not significant. Subsequently, after evaluating the heating performance, the heating output was 32.3 kW and the heating efficiency was 87.9%. After the environmental evaluation of the second prototype, it was confirmed that the CO concentration was very stable. PM less than 0.5 μm emission in total suspended particles(TSP) gave the highest contribution. Overall, the environmental certification standards for domestic firewood boilers were designed to be under 600 mg/m3 for CO, under 150 mg/m3 for NOx, and under 60 mg/m3 for PM.

영어초록

The wood pellet industry for heating system has been a popular choice as an alternative to oil. Overseas research on firewood boilers is being steadily conducted, mainly in Europe. But locally, there is a need for further research and development for boilers using wood fuel (firewood) for setting environmental standards. In our study, a 30 kW class firewood boiler was developed and performance evaluation (combustion, environmental performance) was conducted. In addition, we designed an environmental certification standard (draft) suitable for the domestic situation by a standardized survey similar to those of domestic and foreign firewood boilers. After analyzing the combustion characteristics of firewood boilers, we have completed the design optimization of controlling more than 50% of the primary air damper and controlling the pyrolysis of heat in secondary air. As a result of analyzing the combustion characteristics for each fuel grade, it was confirmed that there was no significant difference from the EN303-5 quality standard, and the performance difference according to the fuel quality grade was not significant. Subsequently, after evaluating the heating performance, the heating output was 32.3 kW and the heating efficiency was 87.9%. After the environmental evaluation of the second prototype, it was confirmed that the CO concentration was very stable. PM less than 0.5 μm emission in total suspended particles(TSP) gave the highest contribution. Overall, the environmental certification standards for domestic firewood boilers were designed to be under 600 mg/m3 for CO, under 150 mg/m3 for NOx, and under 60 mg/m3 for PM.

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