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정영갑,이석순 慶尙大學校 工科大學 自動化및컴퓨터應用技術硏究所 1996 自動化 및 컴퓨터應用技術 Vol.3 No.1
An AGV(automatic guided vehicle), which has its own power source and moves itself, has developed for the flexible manufacturing system. In the present study, the AGV is made for the load capability of 60㎏. The control unit is a 286 AT personal computer and an expansion card inserted in the expansion slot on the computer is connected with the sensors, a D.C. motor and a step motor. The expansion card contains the interface circuits with 8255, 8253 and digital devices. The AGV is derived by the D.C. motor which is controlled by PWM pulse generated from 8253 and is steered by the step motor. The steering mechanism was made with a arcril plate and a rope in order to increase the torque and to decrease the tolerance. The AGV is guided by sensing the path made with an aluminum tape by the inferred ray sensor. Two batteries of 12V are used to supply the power for D.C Motor and the inverter is used to supply power to the computer. The control program for AGV system is developed with C-language. The developed AGV is successfully derived along the path with more than the design load. In future study, an advanced type of AGV such as guideless and artificial intelligence must be developed.
전용백,정영갑 대구대학교 산업기술연구소 2004 産業技術硏究 Vol.16 No.1
This study experimented dividing compaction load by dynamic compaction test and an oil pressure hammer compaction test for consolidation strength characteristics experimental feedback about soil change aspect of waste landfill ground and revelation of compaction effect as underground research about consolidation behavior of waste landfill ground by compaction load, foot weight and percussion number of times were adapted differently each other with uniformity drop head when dynamic compaction test, and hammer scale and percussion number of times were adapted differently also when oil pressure hammer compaction test.
전용백(Yong-Back Chon),정영갑(Young-Gab Jeong) 한국산업융합학회 2004 한국산업융합학회 논문집 Vol.7 No.4
This study experimented dividing compaction load by dynamic compaction test and an oil pressure hammer compaction test for consolidation strength characteristics experimental feedback about soil change aspect of waste landfill ground and revelation of compaction effect as underground research about consolidation behavior of waste landfill ground by compaction load, foot weight and percussion number of times were adapted differently each other with uniformity drop head when dynamic compaction test, and hammer scale and percussion number of times were adapted differently also when oil pressure hammer compaction test.<br/>
박호영,서상일,김영주,김태형,정재화,이성호,안광익,정영갑 한국수소및신에너지학회 2011 한국수소 및 신에너지학회논문집 Vol.22 No.4
This paper describes the evaluation of kinetic parameters for pyrolysis and carbon char oxidation of residual oil. The non-isothermal pyrolysis of residual oil was carried out with TGA (Thermo-Gravimetric Analyzer) at heating rate of 2, 5, 10 and 20℃/min up to 800℃ under N2 atmosphere. The first order and nth order pyrolysis models were used to fit the experimental data, and the nth order model was turned out to follow the experimental data more precisely than the first order model. For carbon char oxidation experiment, TGA and four heating rates used in pyrolysis experiment were also adapted. The kinetic parameters for the residual carbon char particle were obtained with three char oxidation model, that is, volume reaction, grain and random pore model. Among them, the random pore model described the char oxidation behaviour quite well, compared to other two models. The non-linear regression method was used to obtain kinetic parameters for both pyrolysis and carbon char oxidation of residual oil.
고정층 반응기를 이용한 우드펠릿 반탄화 특성에 관한 연구
유승한(Seunghan Yu),박진제(Jinje Park),김민수(Minsu Kim),류창국(Changkook Ryu),이용운(Yongwoon Lee),양원(Won Yang),정영갑(Yeong-gap Jeong) 한국열환경공학회 2019 한국열환경공학회 학술대회지 Vol.2019 No.춘계
우드펠릿은 바이오매스의 압축 성형 가공을 통해 생성된 연료로써 대형 보일러에서 전소 또는 혼소의 형태로 사용된다. 하지만, 우드펠릿의 낮은 분쇄성은 연소 시 미연탄소 발생량을 증가시키며, 석탄과의 혼소율을 제한한다. 반탄화는 연료의 품질을 개선하는 공정으로써, 이러한 분쇄성 문제를 해결함과 동시에 연료의 탄소함량 및 고위발열량을 증가시킨다. 본 연구는 우드펠릿의 연료 특성 및 분쇄성 개선을 위해 고정층 반응기를 이용하여 반탄화를 수행하였다. 210~310℃ 온도 범위 및 15~60 분 체류시간 조건에서 반탄화 된 생성물의 특성을 분석하였다. 질량 수율은 86.18~39.46% 로 측정되었으며, 질량 수율 감소에 따라 탄소 함량 및 고위발열량이 상승하였다. 반탄화 펠릿의 특성들은 질량 수율에 대해 경향성을 나타내었으며, 반탄화 펠릿의 용적 밀도는 질량 수율의 0.538 승에 비례하여 감소하였다. 에너지 밀도는 반탄화 정도에 따라 증가하여 수율 83%에서 최대치인 10.41 GJ/m3 로 측정되었으며, 이후 감소하여 질량 수율이 60% 이하일 땐 오히려 기존 우드펠릿보다 낮게 측정되었다. 분쇄성은 반탄화 정도에 따라 선형적으로 증가하였으며, 75% 이하의 질량 수율에서 석탄의 분쇄성과 비슷해지는 것을 확인할 수 있었다. 따라서 우드펠릿이 미분탄 혼소 보일러에 사용되기 위한 이상적인 반탄화 범위는 적절한 에너지 수율과 분쇄성을 보유하는 질량 수율 75%~80% 범위가 적합하다고 판단된다.