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- W2497173612 abstract "Publisher Summary This chapter explores a mathematical module to predict the working performance of radiant cooler in thermal vacuum test. The temperature and the emissivity of the cold shield, two influencing factors are discussed. The working performance of a parabolic cylinder radiant cooler on different thermal vacuum test conditions is presented. The working performance of radiant cooler can be predicated in thermal vacuum test on earth. The thermal vacuum test chamber is a cylinder in certain diameter. A pressure of 5 × 10 -5 Pa is maintained inside the thermal vacuum chamber to make the convective transfer effects insignificant. The temperature of inter-well of cylinder is as high as that of liquid nitrogen. There is a big piece of black honeycomb board, called cold shield, covering the mouse of radiant cooler. The cold shield can be cooled to lower than 20K by a refrigeration system based on gaseous helium. It is important to improve the emissivity of the cold shield as it has great influence on the test result. There is little difference in test result when the temperature of the cold shield is lower than 24K. It is well enough that the cold shield is cooled by a refrigeration system based on gaseous helium to about 17K in the thermal vacuum test." @default.
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- W2497173612 date "2005-01-01" @default.
- W2497173612 modified "2023-09-25" @default.
- W2497173612 title "The Working Performance of Radiant Cooler in Thermal Vacuum Test" @default.
- W2497173612 doi "https://doi.org/10.1016/b978-008044559-5/50105-8" @default.
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