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콘크리트용 잔골재로 활용하기 위한 습식 급랭 전로슬래그의 기초 물성에 관한 연구
최연왕,최병걸,오세왕,조봉석,Choi, Yun-Wang,Choi, Byung-Keol,Oh, Se-Wang,Cho, Bong-Suk 한국건설순환자원학회 2015 한국건설순환자원학회 논문집 Vol.3 No.2
최근 건설산업에서는 천연 골재 고갈과 엄격한 환경 규제로 인하여 골재 부족 현상이 지속되고 있기 때문에 대체 골재 개발이 시급한 실정이다. 따라서 본 연구에서는 기존 전로슬래그 처리방식의 문제점을 해결하기 위한 새로운 처리방식 즉, 고온 용융슬래그를 회전식 드럼내에 투입한 다음 냉각수, 압축공기 및 강철구를 이용하여 급속 냉각, 파쇄 처리하는 공정에서 발생되는 습식 급랭 전로슬래그를 콘크리트용 잔골재로 활용하기 위하여 기초물성을 검토하였다. 또한 본 연구를 통하여 콘크리트용 잔골재로써 습식 급랭 전로슬래그의 활용 방안을 제안하고자 한다. Recently, development of substitution aggregate is urgently needed because aggregate shortage is continuing due to the exhaustion of natural aggregate and strict restrictions of environment in construction industry. Therefore, In this study, new processing method to solve the problems of processing method of existing converter slag, namely, rapid cooling slag produced by the rapid cooling and crushing process of the high temperature melten slag into the rotary drum and then using the cooling water, compressed air and steel ball was examined fundamental properties for utilize as fine aggregate for concrete. In addition, through this study, we propose the utilization method of rapid cooling slag as fine aggregate for concrete.
국내 지열원 히트펌프 유닛의 인증제도 분석을 통한 신뢰성 향상 방안 연구
양찬우(Chan Woo Yang),강희정(Hee Jeong Kang),오세왕(Sewang Oh),도우빈(Ubin Do),이광호(Kwang Ho Lee),최종웅(Jong Woong Choi),조용(Yong Cho),최종민(Jong Min Choi) 한국신재생에너지학회 2023 신재생에너지 Vol.19 No.4
Only ground source heat pump units certified according to the regulations in Korea can be adopted in ground source heat pump systems. In this study, domestic and international standards and regulations for ground source heat pump units were investigated. Unlike ISO 13256-1~2, which is the international standard, KS B 8292~8294 for ground source heat pump unit only included rated test conditions. Therefore, it is necessary to supplement various test conditions to the KS B series, because its performance data, which is required to calculate the system’s design capacity, is dependent on the change in entering water temperature. The difference between the coefficient of performance of the certified ground source heat pump units and the certified criteria changed significantly according to the operating mode, heat source, and load type, because the criteria increased by about 5% for all. Thus, it is highly suggested that the certification standards be revised while considering the product performance level and various conditions.