Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Vacuum Pressure Effect on Thermal Conductivity of KLS-1

진공압에 따른 한국형 인공월면토(KLS-1)의 열전도도 평가

  • Jin, Hyunwoo (Dept. of Future & Smart Construction Research, Korea Institute of Civil Engrg. and Building Technology) ;
  • Lee, Jangguen (Dept. of Future & Smart Construction Research, Korea Institute of Civil Engrg. and Building Technology) ;
  • Ryu, Byung Hyun (Dept. of Future & Smart Construction Research, Korea Institute of Civil Engrg. and Building Technology) ;
  • Shin, Hyu-Soung (Dept. of Future & Smart Construction Research, Korea Institute of Civil Engrg. and Building Technology) ;
  • Chung, Taeil (Dept. of Future & Smart Construction Research, Korea Institute of Civil Engrg. and Building Technology)
  • 진현우 (한국건설기술연구원 미래스마트건설연구본부) ;
  • 이장근 (한국건설기술연구원 미래스마트건설연구본부) ;
  • 류병현 (한국건설기술연구원 미래스마트건설연구본부) ;
  • 신휴성 (한국건설기술연구원 미래스마트건설연구본부) ;
  • 정태일 (한국건설기술연구원 미래스마트건설연구본부)
  • Received : 2021.07.27
  • Accepted : 2021.08.03
  • Published : 2021.08.31
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Abstract

South Korea, as the 10th country to join the Artemis program led by NASA, is actively supporting various researches related to the lunar exploration. In particular, the utilization of water as a resource in the Moon has been focused since it was discovered that ice exists at the lunar pole as a form of frozen soil. Information on the thermal conductivity of lunar regolith can be used to estimate the existence for ice water extraction by thermal mining. In this study, the vacuum pressure effect on thermal conductivity of KLS-1 was investigated with a DTVC (Dusty Thermal Vacuum Chamber). The reliability of KLS-1 was reconfirmed through comparison with thermal conductivity of known standard lunar regolith simulants such as JSC-1A. An empirical equation to assess thermal conductivity considering dry unit weight and vacuum pressure was proposed. The results from this study can be implemented to simulate lunar cryogenic environment using the DTVC.

최근 우리나라는 미국항공우주국이 주도하는 유인 달 탐사 프로젝트인 아르테미스 프로그램에 10번째 국가로 참여하게 되면서 다방면에서 유관연구를 수행하고 있다. 특히, 달의 극지방에는 동결토 형태로 다량의 물이 존재하는 것으로 밝혀지면서 이를 자원으로 활용하기 위한 연구들이 활발히 진행되고 있다. 달 표면에 자리 잡고 있는 월면토의 열전도도에 관한 정보는 얼음 존재 추정 및 취득을 위한 열 채굴 기술 등에 활용될 수 있다. 본 연구에서는 지반열진공 챔버를 활용하여 진공압에 따른 한국형 인공월면토(KLS-1)의 열전도도를 측정하였다. 기존 연구에서 밝혀진 인공월면토(JSC-1A)와 비교분석을 통해 한국형 인공월면토의 유효성을 재확인하였으며, 건조단위중량 및 진공압에 따른 열전도도 추정이 가능한 경험적 예측모델을 제안하였다. 본 연구에서 도출된 결과는 진공 챔버를 이용한 달 행성의 극저온 환경 구현 시 활용이 가능할 것으로 판단된다.

Keywords

Acknowledgement

본 연구는 한국건설기술연구원의 주요사업인 "극한건설 환경 구현 인프라 및 TRL6 이상급 극한건설 핵심기술 개발(20210190-001)" 과제의 지원으로 수행되었으며, 이에 깊은 감사를 드립니다.

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