Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
권호 표지

Status and Feasibility Study on Tidal Energy Technology

조력에너지 기술 현황 및 경제성 분석

  • Cho, Young-Beom (Department of Environmental Engineering, The Catholic University of Korea) ;
  • Wee, Jung-Ho (Department of Environmental Engineering, The Catholic University of Korea) ;
  • Kim, Jeong-In (Department of Industrial Economics, Chung Ang University)
  • 조영범 (가톨릭대학교 환경공학과) ;
  • 위정호 (가톨릭대학교 환경공학과) ;
  • 김정인 (중앙대학교 산업경제학과)
  • Received : 2010.04.10
  • Accepted : 2010.06.22
  • Published : 2010.06.30
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Abstract

Currently, many nations in the world make a strong effort to exploit the new and renewable energy. Tidal energy is the constant and regular power sources with higher and more stable quality compared to other renewable sources. The present paper reports the status of tidal energy analyzing its latest technology and development. In addition, a feasibility study on two types of tidal power plant(TPP) systems is conducted based on many assumptions, conditions and data involved in the Korea environment. The Sihwa and Uldolmok TPP are considered as the reference of tidal barrage(TB) and tidal in stream energy conversion(TISEC) type, respectively. While TB technology is currently mature and reliable, there still remain many environmental issues. Whereas, TISEC is recently received more attention due to its environmental friendly aspect. Therefore, the TISEC is believed to be very promising technology as the TPP. The unit electricity generation cost of Sihwa TPP is approximately 67.3 KRW/kWh. However, considering additional cost of Sihwa lake construction, it increases to 254 KRW/kWh. In Uldolmok, the unit electricity generation cost is calculated to be about 400 KRW/kWh, which is even higher than that of Sihwa TPP. This is ascribed to high cost of TISEC device and construction cost due to its technological infancy as well as relatively small power capacity. Nevertheless, the TISEC technology would be substantially developed in the future due to its many advantageous features.

현재 전 세계적으로 신재생에너지의 개발과 이용에 관한 연구가 활발히 진행되고 있다. 조력에너지는 다른 재생에너지의 비해 안정적인 공급이 가능한 고급 자원이다. 본 논문에서는 조력에너지 대한 세계적인 연구 및 개발 동향을 고찰하였고 시화호 조력발전소와 울돌목 조류발전소의 경제성을 분석하였다. 댐 방식 조력발전은 경제성과 기술적 신뢰성이 있으나 상당한 환경적 논쟁이 있다. 반면, 조류식 조력발전은 완전한 상용화를 이루지 못하고 있으나 환경적 폐해가 거의 없는 것으로 평가되어 댐 방식 보다 더 많은 연구가 진행되고 있다. 시화호 조력발전인 경우 발전단가는 약 67.3원/kWh, 여기에 시화호의 조성비용을 추가로 고려할 경우 254원/kWh로 계산되었다. 반면 울돌목 조류발전의 발전단가는 약 400원/kWh로 이는 조류발전 기술이 성장 단계라 장비와 건설비용이 비싸고, 또한 아직 규모의 경제성이 적용되지 못한 결과라 하겠다.

Keywords

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