| Citation: | ZHAO Zhenming, MENG Qingliang, ZHANG Huandong, et al. Simulation and experimental study of mechanically pumped two-phase loop for CCD[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(5): 893-901. doi: 10.13700/j.bh.1001-5965.2018.0519(in Chinese)
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As one of the core components of spaceflight optical remote sensor, the temperature of the charge-coupled device (CCD) will affect the working performance. Therefore, traditional thermal control products have gradually been difficult to meet the needs of high-power CCD precise temperature control. In this paper, the start-up characteristics, operation status, flow and heat transfer characteristics of internal working fluid of mechanically pumped two-phase loop (MPTL) used in temperature control of CCD are studied by simulation and test. The results show that MPTL can absorb the influence of external heat flow of condenser and working mode of CCD by adjusting quality, and the temperature control accuracy of MPTL can reach ±1℃. The parallel branch of the evaporator, the load of the evaporator and the temperature change of the condenser in a certain range will not affect the stability of the system, and the CCD can still be controlled at the required temperature. By comparing the simulation with the experiment, it is found that the error of the simulation model is within ±1℃, which verifies the validity and accuracy of the model. MPTL can satisfy the requirement of temperature control of space optical remote sensor CCD very well. It can ensure that the CCD always has good temperature stability and uniformity, and the system has good operational characteristics and robustness. It has a good application prospect in the precision temperature control of CCD.
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