한국지열·수열에너지학회논문집 (Journal of the Korean Society for Geothermal and Hydrothermal Energy)

  • 제21권4호
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  • Pages.51-61
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  • 2025
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  • 2799-4783(pISSN)
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  • 2799-4805(eISSN)
한국지열·수열에너지학회 (Korean Society for Geothermal and Hydrothermal Energy)
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사각 축열조 내 평판형 디퓨저 간격 및 배플 형상이 열성층화에 미치는 영향성 분석

Analysis of the Influence of the Spacing between Flat Diffusers and the Shape of the Baffles in a Square Storage Tank on Thermal Stratification

  • 최성민 (조선대학교 기계공학과) ;
  • 유나영 (조선대학교 기계공학과) ;
  • 함정균 (조선대학교 기계공학과) ;
  • 조홍현 (조선대학교 기계공학과 )
  • Seongmin Choi (Department of Mechanical Engineering, Graduate School of Chosun University) ;
  • Nayoung You (Department of Mechanical Engineering, Graduate School of Chosun University) ;
  • Jeonggyun Ham (Department of Mechanical Engineering, Chosun University) ;
  • Honghyun Cho (Department of Mechanical Engineering, Chosun University)
  • 투고 : 2025.11.10
  • 심사 : 2025.11.27
  • 발행 : 2025.12.01
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초록

This study numerically analyzed the effects of the upper and lower plate spacing and baffle geometry of a flat-plate diffuser in a square thermal storage tank on thermal stratification and charging characteristics. The upper and lower plate spacing of a flat-plate diffuser affects heat exchange characteristics and mixing behavior depending on the Froude number, a key factor determining the relative ratio of inertial and buoyancy forces in the inflow. Furthermore, the baffle geometry directly influences the stability of stratification by inducing inflow dispersion. The analysis results showed that when buoyancy was dominant, the contact area between the cold water and the hot fluid immediately after discharge increased, enhancing mixing. When inertial force was dominant, the jet flow tended to form upward, increasing mixing at the top. Conversely, when Fr=1, where inertial and buoyancy forces are balanced, the inflow maintained a stable downward flow along the bottom, resulting in the fastest charging performance. A comparison of baffle configurations revealed that a middle-plate type structure with an auxiliary plate added to the center uniformly distributed the flow and minimized mixing at the boundary between the cold and hot water layers, maintaining the most stable stratification performance.

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과제정보

본 연구는 산업통상자원부(MOTIE)와 한국에너지기술평가원(KETEP)의 지원(No. RS-2024-00441860)과 환경부의 재원으로 한국환경산업기술원의 지원을 받아 수행하였습니다(RS-2025-02213313).

참고문헌

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