首页|High-stability temperature control and frequency-domain analysis of sandwich-like insulation design based on phase change materials for satellite thermal management
High-stability temperature control and frequency-domain analysis of sandwich-like insulation design based on phase change materials for satellite thermal management
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High-stability thermal management is critical for the measurements of high sensitivity for temperature,but also challenging because any small thermal disturbances could lead to unacceptable temperature fluctuations.The present work delivers a design for passive temperature control,customized for a component in the satellites for gravitational wave detection.A novel sandwich-like structure is proposed with the configurations of proper materials,consisting of a layer of insulation material and two layers of nanocomposite phase change materials,bringing an integration of heat insulation and absorption/storage.Its performance is examined using an improved thermal network model and the revised transfer function method(TFM).The basic results of the two methods are validated by present COMSOL simulations and available numerical and experimental data in the literature.An effective reduction of temperature fluctuation is achieved to the scale of 0.1 K,even under two thermal disturbances from different directions:a radiative heat flux of 20 W m-2(inside)and a temperature fluctuation of about 20 K(outside).Moreover,the TFM is employed to analyze the effects of the frequency of thermal disturbance:excellent damping performance is obtained for over 3.2 mHz and the underlying mechanism is discussed.Overall,the present design is expected to be combined with active temperature control to explore more possible ways for temperature control with higher stability.
temperature controlsandwich insulation structurephase change materialthermal network modeltransfer function method
WANG ZiHan、HE ChenBo、HU Yang、TANG GuiHua
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Key Laboratory of Thermo-Fluid Science and Engineering,Ministry of Education,School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an710049,China
National Key Research and Development Program of ChinaNational Natural Science Foundation of China
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