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- 저자 : 강석구(Seog Goo Kang) (검색결과 40 건)
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강석구 ( Seog Goo Kang ),이화형 ( Hwa Hyoung Lee ) 한국목재공학회 2011 목재공학 Vol.39 No.1
This research was carried out to examine the ultrasonic properties of Phyllostachys bambusoids Sieb et Zucc depending on three directions for providing the fundamental properties of the Korea traditional flute, Daekeum. The ultrasonic properties of Phyllostachys bambusoides Sieb. et Zucc were found to be different from those of wood, because of the distinctive anatomical structure of bamboo tissue. The ultrasonic velocity of peripheral zone showed higher values of all three directions. The ratio of longitudinal velocities to perpendicular velocities showed 116 at peripheral zone, 170 at central zone, 1.38 at inner zone respectively. The ratio of radial velocities to tangential velocities were measured as 1.286 at peripheral zone, 1325 at central zone, 0.829 at inner zone respectively.
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강석구 ( Seog Goo Kang ),이화형 ( Hwa Hyoung Lee ) 한국목재공학회 2011 목재공학 Vol.39 No.1
This study was carried out to examine properties of water resistant plywood by using serum protein adhesive which is natural environment-friendly and human-friendly. For the preparation of the serum protein adhesive, pig blood from slaughterhouse was centrifuged and serum was separated from corpuscles and concentrated to 30% by dry weight basis This concentrated serum protein was modified with PF resin(50% NVC) with the ratio of 9:2.5. Plywood made by this modified serum protein gave 1.21 N/mm2 of dry bonding strength, 0.80N/mm2 of wet boil bonding strength, 0% of cyclic delamination test value, and 0.025ppm of HCHO emission, which met the excellent super Eo grade and water resistant plywood.
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버섯 폐배지의 연료화 및 품질개선을 위한 반탄화 최적화 연구
이창구 ( Chang-goo Lee ),최병훈 ( Byeong-hoon Choi ),구영모 ( Yeong-mo Koo ),강석구 ( Seog-goo Kang ) 한국목재공학회 2022 한국목재공학회 학술발표논문집 Vol.2022 No.2
This study was conducted as part of the purpose of realizing the fuelization and quality improvement using spent mushroom substrate through a torrefaction pretreatment. Conditions of torrefaction pretreatment were performed at temperatures of 250, 350, and 450°C and reaction times of 600, 1,200, and 1,800s, respectively. In order to confirm the fuel characteristics were conducted to proximate analysis and higher heating value. As the experimental materials, to determine the tendency of spent mushroom substrate according to the cultivation period of Letinula edodes, the products discarded after harvesting 2, 4, 6 and 8 cycles were used. As a result, higher heating value and content of fixed carbon has been increased and contents of moisture content and ash has been decreased the more torrefaction pretreatment for temperature and time increased. Furthermore, the results of calculating the energy yield through the higher heating value and the mass yield, it found that most suitable for molded charcoal of the manufacturing a conditions of 1,200-1,800s of 350°C in this study.
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반탄화 목분과 폐활성탄 혼합물의 복합연료활용을 위한 연료적 특성에 관한 연구
이창구 ( Chang Goo Lee ),강석구 ( Seog Goo Kang ) 한국목재공학회 2015 목재공학 Vol.43 No.1
This study evaluated fuel properties of composite materials which were prepared by mixing a waste activated carbon from the used purifier filter with torrefied wood powder. Wood species of the raw material of torrefied wood powder are oak wood (Quercus serrata Thunb. ex Murray) and pine wood (Pinus densiflora Siebold & Zucc). And the treatment conditions used for this study were 300 s, 450 s, and 600 s at 200℃ for the wood roaster. Also, the mixing ratios are 5 : 95, 10 : 90, 15 : 85, 20 : 80, 40 : 60, 60 : 40 and 80 : 20 (waste activated carbon : torrefied wood powder). The fuel properties such as highly heating value (HHV), elementary analysis and ash content were evaluated. The results obtained are followings; 1. Despite the same treatment condition of wood roasting, pine wood has higher carbon contents than oak wood. Therefore, pine wood indicated the optimum carbonization at low temperature and short treatment times. 2. The gross calorific value and ash content increased as the mixing ratio of waste activated carbon increased. 3. Mixtures of the waste activated carbon and torrefied wood powder showed greater gross calorific value than those of the mixtures of waste activated carbon and the untreated wood powder. Also, the pine wood resulted in higher heating value that thaose of the oak wood. 4. When composite fuels that were composed waste activate carbon and wood powder are used, higher temperature conditions are required because the combustion is incomplete at 800℃ and 4 hours. 5. The increasing rate of the gross calorific value of mixtures of waste activated carbon and untreated wood powder is higher than does the mixtures of waste activated carbon and torrefied wood powder. Also, this phenomenon is more obvious for pine woods. Therefore, an optimal mixing ratio of waste activated carbon was determined to be between 5% and 10% (wt%). Also, this condition satisfied the requirement of the No.1 grade of wood pellet.
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< 전시-P-17 > 침엽수 3종의 방사방향 투습성능에 따른 Bio Dryer의 목재건조효과에 관한 연구
김준호 ( Joon Ho Kim ),강석구 ( Seog Goo Kang ) 한국목재공학회 2019 한국목재공학회 학술발표논문집 Vol.2019 No.1
본 연구는 바이오 드라이어로 사용하기에 적합한 침엽수종을 조사하기 위하여 수행되었다. 바이오 드라이어에 적합한 수종을 알기 위하여 국내 주요 침엽수 수종인 은행나무, 라디에타 파인, 낙엽송을 선정하였다. 3가지의 침엽수 판재를 세부분으로 나누어 200 x 200 x 10mm로 건조 및 가공하여 판재를 제작하고 실험용 챔버의 4면의 단열성을 유지하기 위해 아이소핑크 단열재로 마감하여 상판을 침엽수 판재로 한 고정부피 8000㎤의 정오면체 챔버를 제작하였다. 이후 500x500mm의 열판위에 내부 온습도를 측정할 TR-7nw 온습도계와 건조의 유무를 알기 위한 40 x 110 x 30mm의 참나무 생재를 80mm 높이의 알루미늄 호일로 이용한 거치대 위에 설치한 후 온도센서를 부착한 챔버를 덮고 마감하여 밀폐하고 각면에 온도센서를 부착하여 열판온도 70℃에서 24시간동안 실험하였다. 모든 시편은 실험 전 최초의 질량을 측정하고 실험이 종료된 후의 질량과 전건질량을 측정하여 함수율의 변화를 측정하였다. 실험 결과, 3가지의 침엽수 챔버 중 은행나무를 제외한 두 수종의 챔버 내부에서 결로 현상이 발생하여 판재 자체의 함수율 증가로 인한 팽창으로 휨 현상이 발생하였다. 이는 상판판재가 열에 의해 건조되었다가 생재에서 방출되는 수분이 판재에 흡수되어 판재의 함수율이 증가하게 되고, 그로 인하여 팽윤현상이 발생하여 휨 현상이 발견되었다고 할 수 있다. 각 챔버의 내부평형함수율은 4~5%로 거의 비슷하였지만, 참나무 생재의 함수율 변화를 측정한 결과 은행나무 챔버 내부의 생재 함수율이 20~30%까지 감소하였음을 알 수 있었고, 라디에타 파인 챔버 42~44%, 낙엽송 챔버는 47~49%로 감소하였음을 확인하였다. 이러한 함수율의 변화로 인하여 세가지 침엽수의 방사방향 투습성능은 은행나무가 가장 좋다고 결론 지었으며, 이 후 두께 변화에 따른 투습성능을 알아보기 위하여 10mm,15mm,20mm의 세가지 두께로 변화를 주어 이들의 투습성능을 비교분석하였다.
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손동원 ( Dong Won Son ),강석구 ( Seog Goo Kang ) 한국목재공학회 2014 목재공학 Vol.42 No.6
The purpose of this study is to analyze fundamental combustion characteristics of woods used for indoor applications. The combustion characteristics such as heat release rate, total heat release, gas yield, and mass loss were analyzed by the method of cone calorimeter or thermogravimetry. These analysis results show that material properties of wood are closely related to flammability. It was shown that the relationship between the mass loss and gas emission. The results of combustion properties of woods would be useful for fundamentals of guiding the safe use of wood indoor application.
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