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3차원 패턴 레이저를 이용한 유영어류의 형태 및 크기 측정
양용수 ( Yongsu Yang ),이경훈 ( Kyounghoon Lee ),편용범 ( Yongbeom Pyeon ),윤은아 ( Eun A Yoon ),이동길 ( Dong Gil Lee ),조현수 ( Hyun Su Jo ) 한국어업기술학회 2016 수산해양기술연구 Vol.52 No.2
This study aims to estimate the species, size and shape of fish using a non-contact 3 dimensional pattern laser so that this preliminary test was carried out to understand the structural feature and length of goldfish according to water turbidity and depth in the aquacultural tank. 3-D pattern laser could clearly detect its morphological shape except the caudal fin due to soft tissue. Since the sensing strength of line laser light according to depth has sufficient power, it is possible to measure its depth and structural feature in the detected range. The result showed that the measured error of individual`s fork length was less than ±1% in the water using 3-D pattern laser, when compared with the measured value in the air.
소형 가스사이클론 집진장치를 이용한 PM 전처리 시스템의 유동 가시화
양용수 ( Yongsu Yang ),이경훈 ( Kyounghoon Lee ),조현정 ( Hyeonjeong Jo ) 한국어업기술학회 2016 수산해양기술연구 Vol.52 No.3
This study is aimed to design the mechanical gascyclone precipitator with an outstanding collection efficiency as one of ways to reduce exhaust gas of small-scale vessels. It estimated fine particles generated from diesel engines which has become one of the biggest environmental issues currently. Specifically, it quantitatively analyzed the flowing process from the cyclone gas exit; a duct via part to the collecting part of Cylindrical lower using DPIV (Digital Particle Image Velocimetry). Since the gas inlet height part became wider the previous theoretical dimensions, internal fluid characteristics of cyclone where the speed of internal swirl had been slow were investigated by temporary streamline of fine particles at 14-20 ㎛. The results showed that collecting efficiency was three times higher than the conical type utilized previously. In addition, this study supplemented imprecision problems from the previous theoretical equation and CFD interpretation with an experimental method. It also provided a basic data to design the cyclone precipitator by size of diesel engines for vessels.
양용수 ( Yongsu Yang ),임한규 ( Han Kyu Lim ),이경훈 ( Kyounghoon Lee ),이동길 ( Dong Gil Lee ),신형호 ( Hyeong Ho Shin ) 한국어업기술학회 2015 수산해양기술연구 Vol.51 No.4
This study aims to estimate the Green-House-Gas emissions from domestic farmed flounder in the southern sea and Jeju-Do, where is mainly produced, by the assessment of energy consumptions and GHG emissions from domestic fish farms for establishing reduce standards of greenhouse gas from a sustainable perspective. It needs to analyze such GHG emission components as feed, electricity, fuel, fixed capital, fish respiration, and liquid oxygen in two locations by 4 stage running water type farm size of small, small and medium, large and medium, large scale. The result showed that the mean GHG emissions were 36.83 kg·CO2/year in the southern sea and 24.33 kg·CO2/year in Jeju-Do, respectively, in the stage of production per fish 1kg at 2 locations and farm size from domestic farmed flounders, and it will give to be useful for policy, planning, and regulation of aquaculture development with establishing GHG reduction standards.
양용수 ( Yongsu Yang ),이경훈 ( Kyounghoon Lee ),배재현 ( Jaehyun Bae ),김성훈 ( Seonghun Kim ),박성욱 ( Seongwook Park ),박태일 ( Taeil Park ),구자선 ( Jasun Koo ) 한국수산해양기술학회 2015 수산해양기술연구 Vol.51 No.3
Fish exportation using airplanes incurs sizable logistics costs (12,000KRW/kg), according for more than 45% out of the total export cost. Thus, it is unreasonable to quantitatively expand fish exportation by means of air transport. In addition, cases of failing to deliver fish at the right time to the right place occurs frequently due to the limited cargo capacity and insufficient cargo space of airplanes, especially during the peak season. Therefor, a technology that not only minimizes the logistics costs but also transports fish freshly and safely, in the case of long distance exportation to countries such as the United States and Taiwan, should be developed. In this study, a live fish container control system for long distance transportation was designed and implemented. Live flatfish (2,000kg) were selected as the target fish, were transported to the United States to analyze and verify the performance of the a live fish container control system and transportation ability.
이동길 ( Donggil Lee ),양용수 ( Yongsu Yang ),김병관 ( Pyungkwan Kim ),김성훈 ( Seonghun Kim ),김현영 ( Hyunyoung Kim ) 한국어업기술학회 2017 수산해양기술연구 Vol.53 No.2
The renewable energy sources can be thought of one of the major measures to reduce greenhouse gas emissions in the industries. However, the utilization technology for those sources is approaching in the different matters. One of them, thermoelectric generation might be applicable to fishing industry. A various of internal combustion engines are used in a wide range of fisheries. After the ignition process, the heat passed out from the exhaust outlet. Recycling the heat could be not only an energy source but also reduction of green gas emission. Therefore, this study was designed to verify the feasibility of generation from wasted exhaust gas and analyze the performance. The designed experiment devices were connected with a data logger and an electric loader to quantify the currency and voltage. The devices were installed in a coastal fishing vessel for a gillnet fishery. During the whole fishing trips, the amount of generation was measured by engine rpm and the fishing operation procedures including vessel operations. At the maximum 1,500 rpm in the practical range, the generation amount was 113.6 W. The amount difference in relation to connection method was within 5 W: serial connection was 111.4 W and parallel connection was 115.8 W.
박미선(Miseon PARK),양용수(Yongsu YANG),도용현(Yonghyun Do),이동길(Donggil LEE) 한국수산해양교육학회 2016 水産海洋敎育硏究 Vol.28 No.5
The expansion of high-density aquaculture in the limited waters has caused a wide variety of problems. The problems include environmental problems nearby aquaculture sites, growth rate of aquatic organisms, quality decline of farmed fish and price fall in the market. The phenomenon of aquaculture industry happens in not only inshore but also offshore. Therefore, the fisheries authorities have been changing their policy paradigms from mass production to sustainable production based on ecosystem. Other countries, however, focusing on relieving poverty and providing protein from fish production have not recognized the degree of seriousness. When it comes to enhancing the problems, National Institute of Fisheries Science has been developing the technology of Integrated Multi-Trophic Aquaculture (IMTA) to reduce and to prevent contaminants from fish and aquaculture sites, remained feed from fish farming process. In long-terms of view, the system is one of the most sustainable fishery production methods based on ecosystem. As integration of nutrient feed system from aquatic organisms is firmly established, the earlier mentioned problems will be diminished gradually. In term of the substantiality, this study was conducted. The research on management system for IMTA also has been incorporated. This study also investigated the features and current status of IMTA and demonstrated the developed management system and direction for the future advancement.
권보남(Bonam Kwon),양용수(Yongsu Yang) 제어로봇시스템학회 2018 제어·로봇·시스템학회 논문지 Vol.24 No.2
Although live fish are transported through various means, aircraft are predominantly used for transporting fish over long-distances to minimize travel time and maintain freshness. However, air transportation has a limited loading capacity and weight, and is more expensive than other transportation methods. Therefore, to reduce transportation costs, studies have been conducted on live fish containers that are installed with large water tanks for use in long-distance transportation methods. Accordingly, the most effective method is decreasing the activity of fish at low water temperatures, thereby reducing contamination from sources such as excrement. In this study, the optimum low water temperature at which live fish can be maintained during transportation in a container is determined, using an image processing algorithm that includes a three-dimensional independent vision system is proposed that can measure the fishes’ swimming speed. The swimming speed of the red seabream according to water temperature was thus measured in real time and the results verified the proposed algorithm’s effectiveness.
태양광 발전장치 도입에 따른 소형어선 출어경비 절감 연구
이동길(Donggil LEE),정성재(Seongjae JEONG),김성훈(Seonghun KIM),김병관(Pyungkwan KIM),양용수(Yongsu YANG) 한국수산해양교육학회 2017 水産海洋敎育硏究 Vol.29 No.5
In fisheries, studies on development of technologies for reducing fuel consumption of fishing boat to reduce greenhouse-gas emissions have been extensively conducted. In particular, technologies for minimizing hull Resistance and electric ship propulsion with an electric motor have been being studied. Recently, a leisure boat propelled by electric power which is generated by solar power system has been developed. In this study, we investigate maximum daily energy and consumption energy of normal load and surplus power for a test fishing vessel equipped with 200-wattage photovoltaic power generation system. We suggest that maximum dump energy method based on result analysis of surplus energy by test fishing vessel and way of working should be used to reduce the cost of fishing trip effectively.
이동길 ( Donggil Lee ),김현영 ( Hyunyoung Kim ),배성윤 ( Sungyoun Bae ),김지연 ( Jiyeon Kim ),도용현 ( Yonghyun Do ),양용수 ( Yongsu Yang ) 한국수산해양기술학회(구 한국어업기술학회) 2018 수산해양기술연구 Vol.54 No.3
In this study, we developed a thermoelectric generation system for coastal fishing boats that allows for a high-density arrangement of thermoelectric modules, verified the improvement in performance by conducting comparative analysis between field test results and results from previous studies. The developed thermoelectric generation system was installed in a 3-ton gill-netter to analyze the engine revolutions per minute and energy production per day for each fishing process over a period of 20 days. From the experimental results, the maximum electric energy generated was 207.1 Wh, the minimum was 53.93 Wh and the average electric energy was 129.98 Wh. In accordance with the increasing of the engine r.p.m., the maximum electric production was 183 W at 1,500 r.p.m. It was approximately 80.5% of designed capacity, 227.2 W. Considering the result in the earlier research was 50.7% of designed capacity, 115.8 W. It was improved by 30% compared to the earlier one. The fishing operation was classified as departure, fishing and arrival. From the result on production analysis of electric energy, the composition of energy was 63% in fishing, 19.5% in departure and 17.5% in arrival. The electric energy production per unit hour was 42.8% in arrival, 32.9% in departure and 24.3% in fishing.