Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Thermal Vacuum Test of the Phase Change Material Thermal Control Unit Loaded on the Satellite Flight Model and Thermal Model Correlation with Test Results

위성에 탑재된 상변화물질 열제어장치 비행모델의 열진공시험 및 이를 통한 열해석 모델 보정

  • Cho, Yeon (Department of Mechanical Engineering, Tech University of Korea) ;
  • Kim, Taig Young (Department of Mechanical Engineering, Tech University of Korea) ;
  • Seo, Joung-Ki (Satellite Technology Research Center, Korea Advanced Institute of Science and Technology) ;
  • Jang, Tae Seong (Satellite Technology Research Center, Korea Advanced Institute of Science and Technology) ;
  • Park, Hong-Young (Satellite Technology Research Center, Korea Advanced Institute of Science and Technology)
  • Received : 2022.06.04
  • Accepted : 2022.08.01
  • Published : 2022.10.01
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Abstract

Melting and icing process of the PCMTCU(Phase Change Material Thermal Control Unit) installed on the NEXTSat-2, which is scheduled to be launched in the second half, was investigated through the results of satellite-level TVT(Thermal Vacuum Test). As a result of the test, it was confirmed that the latent heat of PCM contributes to the temperature stabilization of the heating components. The thermal model for numerical analysis of the PCMTCU was correlated to acquire a reasonable degree of accuracy using the collected temperature measurements during TVT. The periodic temperature variation of the PCMTCU in normal on-orbit operation was predicted with the correlated thermal model, and the quantitative contribution of the PCM on the thermal energy management was evaluated with the liquid fraction. It will receive flight telemetry from the NEXTSat-2 after the launch, and complete the space verification of the PCMTCU.

하반기에 발사 예정인 차세대소형위성2호(NEXTSat-2)에 탑재된 고상-액상 상변화물질 열제어장치(Phase Change Material Thermal Control Unit, PCMTCU)의 비행모델에 대한 위성 차원 열진공시험 결과로부터 융해-응고에 따른 작동과정을 분석하였다. 시험결과 PCM의 상변화는 발열부품의 온도 안정화에 기여함을 확인하였다. 시험에서 계측된 온도변화를 이용하여 타당한 정도의 정확도를 갖도록 PCMTCU의 열해석모델에 대한 보정을 수행하였다. 보정된 열해석모델로써 임무궤도의 정상 작동에 따른 PCMTCU의 주기적 온도변화를 예측하였으며, PCM의 액상분율로써 정량적 기여도를 평가하였다. 향후 임무궤도에서의 비행자료를 수신하여 PCMTCU의 우주 환경 검증을 완료할 예정이다.

Keywords

Acknowledgement

이 연구는 한국연구재단을 통해 과학기술정보통신부의 차세대소형위성개발사업(No. NRF-2017M1A3A4A01037203)과 교육부의 이공분야 대학중점연구소지원사업(NRF-2017R1A6A1A03015562)의 지원으로 수행되었다.

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