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차승윤(Seungyun CHA),박태준(Taejun PARK),한인우(Inwoo HAN),이경훈(Kyounghoon LEE) 전남대학교 어업기술연구소 2018 어업기술연구소보고지 Vol.11 No.1
The bycatch ratio was analyzed in the Yeosu coastal area by the shrimp beam trawl net from May, 2016 to May, 2017. According to the small mesh size of the beam trawl, lots of demersal fish were caught and it makes to decrease fisheries resources in the Korean fishery. During the survey period, it was caught in 466.8 kg of 76 species which include 51 fish species, 17 crustaceans and 8 other species, were caught in survey area. The dominant species of Argyrosomus argentatus, Thryssa kammalensis, Trichiurus lepturus, Larimichthys polyactis were a caught. Shrimps of Marsupenaeus japonicus, Metapenaeus joyneri, Fenneropenaeus chinensis, Trachysalambria curvirostris, Parapenaeopsis tenella and Palaemon gravieri were a caught in the survey area. Although the catch amount of shrimps in May and August was small, it increased sharply at February when water temperature was lowered, to 89.3% of the total catch amount. The Bycatch ratio near to Gwangyang-man coastal area was 60.7%, and it was shown that the bycatch ratios in Yeosu and Namhae coastal area were 79.7% and 81.4%, respectively.
SBR 서브사이클에 도입된 암모니아 기반 유입수 분배 전략에 적합한 실시간 제어: 파일럿 규모의 One-stage Deammonification을 위한 현장 경험 및 검증
천민기 ( Chun Mingi ),차승윤 ( Cha Seungyun ),최승혜 ( Choi Seunghye ),김보미 ( Kim Bomi ),윤원상 ( Yun Wonsang ),최민규 ( Choi Minkuy ),최대희 ( Choi Daehee ),정진영 ( Jung Jinyoung ) 한국물환경학회 2024 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2024 No.-
정민호(Minho Jung),김동현(Donghyon Kim),안석의(Seokeui An),손창효(Changhyo Son),윤정인(Jungin Yoon),설성훈(Sunghoon Seol),이준혁(Joonhyuk Lee),정한솜(Hansom Jeong),차승윤(Seungyun Cha) 한국해양환경·에너지학회 2021 한국해양환경·에너지학회 학술대회논문집 Vol.2021 No.10
현재 국내에서는 파리기후협약을 위해 2030년까지 전체 발전량의 20%를 재생에너지로 공급하는 목표를 세웠으며, 신재생에너지 중 1.6%를 해양에너지로 공급하고자 하는 계획을 가지고 있다. 조류발전은 풍력발전보다 에너지 밀도가 높고 출력을 정확하게 예측할 수 있는 장점이 있다. 그러나 조류발전의 경우 풍력발전 대비 냉각방식이 제한적이며, 적절한 냉각이 이루어지지 않을 경우 발전기 성능 저하 및 화재의 위험이 존재한다. 따라서 본 연구에서는 열유체 유동해석을 통해 조류발전기의 냉각시스템에 대한 냉각성능을 분석하였다. 시뮬레이션을 위하여 발전기의 발열량은 안전율 등을 고려하여 발전량의 10%인 130kW로 가정하였다. 발전기 고정자의 냉각에는 고정자 내부에 냉각관을 삽입하는 것으로 설계하였으며, 냉각관의 냉각에는 청수를 사용하며, 청수의 냉각에는 해수를 사용하는 것으로 고려하였다. 시뮬레이션 결과 End Winding의 온도가 86.8℃로 분석되어 목표 유지온도보다 낮은 것을 확인하였으나, 유량의 분배가 원활하지 않아 유체의 압력분포가 일정하지 않음을 알 수 있었다. Currently, in Korea, for the Paris climate agreement, the goal of supplying 20% of the total power generation from renewable energy by 2030 is set, and 1.6% of the renewable energy is to be supplied as marine energy. The tidal power generation using marine energy has a higher energy density than wind power generation and the output is easier to predict. However, in the case of tidal power generation, since the cooling method is limited compared to wind power generation, if proper cooling is not performed, there is a risk of deterioration of generator performance and fire. Therefore, in this study, the cooling performance of the cooling system of the tidal generator was analyzed through thermal fluid flow analysis. The assumptions for the simulation analysis are as follows. The heat generation of the generator was assumed to be 130kW, which is 10% of the power generation in consideration of the safety factor. To cool the generator stator, a cooling tube is inserted inside the stator. Freshwater was used to cooling the cooling tube, and seawater was used to cool the freshwater. As a result of the simulation, the temperature of the end winding was observed to be 86.8℃, and it was confirmed that it was lower than the target maintenance temperature.