Journal of the Korean Society for Marine Environment & Energy (한국해양환경ㆍ에너지학회지)

The Korean Society for Marine Environment and Energy (한국해양환경•에너지학회)
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Numerical Analysis on Depressurization of High Pressure Carbon Dioxide Pipeline

고압 이산화탄소 파이프라인의 감압거동 특성에 관한 수치해석적 연구

  • Huh, Cheol (Department of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean University) ;
  • Cho, Meang Ik (Offshore CCS Research Unit, Korea Research Institute of Ships and Ocean Engineering) ;
  • Kang, Seong Gil (Offshore CCS Research Unit, Korea Research Institute of Ships and Ocean Engineering)
  • 허철 (한국해양대학교 해양과학기술융합학과) ;
  • 조맹익 (선박해양플랜트연구소 해양CCS연구단) ;
  • 강성길 (선박해양플랜트연구소 해양CCS연구단)
  • Received : 2015.12.11
  • Accepted : 2016.02.17
  • Published : 2016.02.25
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Abstract

To inject huge amount of $CO_2$ for CCS application, high pressure pipeline transport is accompanied. Rapid depressurization of $CO_2$ pipeline is required in case of transient processes such as accident and maintenance. In this study, numerical analysis on the depressurization of high pressure $CO_2$ pipeline was carried out. The prediction capability of the numerical model was evaluated by comparing the benchmark experiments. The numerical models well predicted the liquid-vapor two-phase depressurization. On the other hands, there were some limitations in predicting the temperature behavior during the supercritical, liquid phase and gaseous phase expansions.

대용량의 $CO_2$를 지중에 저장하기 위한 CCS(Carbon Capture and Storage)는 고압의 파이프라인 수송공정을 수반한다. 또한, 사고 및 유지보수와 같은 비정상상태가 발생할 경우 고압의 $CO_2$를 대기 중으로 방출시키는 감압공정이 필요하다. 본 연구에서는 고압 $CO_2$ 파이프라인에서의 감압현상을 수치해석적 방법을 이용하여 분석하였다. 수치계산 결과를 실험데이터와 비교분석함으로써 수치해석의 예측 능력을 검증하였다. 수치모델이 기체-액체 혼합 구간에서의 2상 감압현상을 잘 예측하였다. 그러나 초임계 액체 단상 감압과 기체 단상 감압현상에 대해서는 온도변화 등을 예측하는데 한계가 있음을 밝혔다.

Keywords

References

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  2. Instability Analysis of Supercritical CO2 during Transportation and Injection in Carbon Capture and Storage Systems vol.11, pp.8, 2018, https://doi.org/10.3390/en11082040