연안어선용 열전발전 장치의 성능개선을 위한 연구
A study of performance improvement of a thermoelectric generation system for the coastal fishing boats
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초록
세계 각국에서는 온실가스 배출량의 감축 목표를 제시하고, 감축 목표치를 달성하기 위하여 많은 노력을 하고 있다. 특히, 최근에는 온실가스와 공해물질 배출량을 저감하기 위해 신재생에너지 개발과 버려지는 에너지원을 전기에너지로 재사용하는 에너지 하베스팅(Energy harvesting) 기술 개발에 대한 많은 연구가 수행되고 있다. 에너지 하베스팅 소자로는 태양전지, 배기열 및 폐열에서 발생하는 온도차를 이용하여 전기에너지로 변환하는 열전소자 등이 있다. 열전소자는 수명이 길고, 소음과 기계적 마모현상이 발생하지 않아 각 산업에서의 응용분야가 넓다. 현재는 자동차와 어선의 엔진, 철강 생산 공정에서 버려지는 열에너지를 수집하여 재사용하는 기술에 대한 연구가 진행되고 있다. 본 연구에서는 발전 성능을 향상시키기 위해서 열전소자 배치를 고밀도화한 연안어선용 열전발전 장치를 개발하고, 그 성능은 선행연구결과와 현장실험 결과를 비교분석하여 나타내었다. 열전발전 장치는 3톤급 연안자망어선에 설치하여, 조업기간(20일) 동안 일별 전력생산량, 엔진 rpm 및 조업과정별 전력생산량을 분석하였다.
Abstract
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.
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