수치해석기법을 이용한 에너지 저소비형 대형 트롤어구 개발 = Development of a low energy used large trawl using a numerical method

다국어 초록 (Multilingual Abstract)

Fuel consumption in fisheries is a primary concern due to environmental effects and costs to fishermen. Much research has been carried out to reduce the fuel consumption related to fishing operations. The fuel consumption of fishing gear during fishing operation is generally related to hydrodynamic resistance on the gear. This research demonstrates a new approach using numerical methods to reduce fuel consumption. The results from the simulation were verified with results that mirrored the model experiments. By designing the fishing gear using drawing software, the whole and partial resistance force on the gear can be calculated as a result of simulations. The simulation results will suggest suitable materials or gear structure for reducing the hydrodynamic forces on the gear while maintaining the performance of the gear. Furthermore, the efficiency of low energy used trawl as economic point of view will be dealt. This research will helpful to reduce the GHG emissions from fishing operations and lead to reduce fishing costs due to fuel savings.

국문 초록 (Abstract)

본 논문은 에너지 저소비형 대형 중층 트롤어구 개발에 관한 논문이다. 현용어구에서 발생하는 저항을 수치해석 방법과 모형어구 실험을 통하여 어구 전체 저항 및 어구의 특성을 고려한 2개의 부분으로 나누어 계산 및 분석하였다. Section 2에서 가장 큰 저항이 발생하여 고강력사를 현재 망사 굵기의 1/2배의 굵기로 변경하여 저항 감소량을 계산 및 분석한 결과, Section 2의 부분에 고강력사를 적용한 경우 현용 어구에서 발생하는 저항대비 49% 감소(i.e., 4knot 예망속력 기준)하였다. 또한 고가의 고강력사를 어구에 적용하였을 때 어구 제작비 증가는 1/2 굵기의 고강력사를 Section 2에 적용할 경우 현용어구 제작비와 비교하여 약 1.9배의 비용이 증가하였다. 이에 따른 유류 소모량은 1항차당 약 23%를 감소시킴을 확인 할 수 있었다.

참고문헌 (Reference)

1 이지훈, "전과정 평가에 의한 한국 근해 대형어업의 온실가스 배출량 분석" 한국수산과학회 44 (44): 383-389, 2011

2 이지훈, "수치해석기법에 의한 어구 저항 분석 및 저탄소 트롤어구 설계와 비용 분석" 한국어업기술학회 46 (46): 313-323, 2010

3 Prior, D., "Optimisation of Trawl Energy Efficiency under Fishing Effort Constraint" 163-176, 2009

4 Aanondsen, S. A., "Life cycle assessments of environmental performance used as a tool in ship design (In Norwegian: Livsløpsanalyser for beregning av miljøpåvirkning brukt som verktøy ved prosjektering av skip)" Department of Marine Technology, Norwegian University of Science and Technology, Trondheim, Norway 1-56, 1997

5 Prado, J., "Fisherman’s Workbook" FAO, Fishing News Books 1-180, 1990

6 Tyedmers, P., "Fisheries and energy use. In: Cleveland CJ, editor. The encyclopedia of energy" Academic Press/Elsevier Science 683-693, 2004

7 Ziegler, F., "Environmental life cycle assessment of seafood products from capture fisheries" 12 : 61-, 2006

8 Ellingsen, H., "Environmental impacts of wild caught cod and farmed salmon-a comparison with chicken" 11 (11): 60-65, 2006

9 Schau, E.M., "Energy consumption in the Norwegianfisheries" 17 : 325-334, 2009

10 Thrane, M., "Energy consumption in the Danish fishery: identification of key factors" 8 : 223-239, 2004

11 Tyedmers, P., "Energy consumed by North Atlantic fisheries. Fisheries Centre Research Report, In Fisheries impacts on North Atlantic ecosystems: catch, effort and national/regional datasets, 9:3" Fisheries Centre, University of British Columbia 12-34, 2001

12 Ziegler, F., "Emissions from fuel combustion in Swedish cod fishery" 11 : 303-314, 2003

13 Cha, S. W., "A study on the fishing operation process for laborsaving of the Korean Large ottertrawl" Pukyong National University 2003