| Citation: | ZHANG Qing, YUAN Wenhao, ZHENG Yan, et al. Experimental on chilldown performance of 60 m3 horizontal storage tank with liquid nitrogen[J]. Journal of Aerospace Power, 2023, 38（1）：86-93 doi: 10.13224/j.cnki.jasp.20220542
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In order to further understand the pre-cooling process of large horizontal storage tanks, an experimental setup was built to investigate the chilldown performance of 60 m3 horizontal storage tank with liquid nitrogen. Accordingly, the cooling and strain features during the chilldown process were studied. The results showed that the vapor temperature experienced overall sharp reduction and subsequent slow reduction. Moreover, thermal stratification occurred in the tank. In the preliminary stage, liquid nitrogen accumulated rarely in the bottom tank. The precooling process of the bottom tank wall could be classified into three stages, namely the mild decline of wall temperature by the cryogenic nitrogen vapor, sharp drop of wall temperature by the boiling heat transfer with liquid nitrogen when the liquid accumulated in the bottom, and the final unchanged temperature with the finish of chilldown. Meanwhile, the upper tank wall kept the mild precooling rate. Besides, the axial strain of tank wall increased with the ongoing pre-cooling. Moreover, a rapid increase of axial strain occurred at the wall in contact with liquid nitrogen. The success of this experiment strongly supplemented the blank of precooling data of large horizontal storage tanks in China and provided data support for related researches such as reliability and life prediction of cryogenic tanks.
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