Study on the Performance of Variable Density Multilayer Insulation in Liquid Hydrogen Temperature Region

Kecen Li, Jie Chen (), Xueqin Tian and Yujing He
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Kecen Li: School of Electrical Engineering, Xinjiang University, Urumqi 830049, China
Jie Chen: School of Electrical Engineering, Xinjiang University, Urumqi 830049, China
Xueqin Tian: State Grid Economic and Technological Research Institute Co., Ltd., Beijing 102209, China
Yujing He: School of Electrical Engineering, Xinjiang University, Urumqi 830049, China

Energies, 2022, vol. 15, issue 24, 1-17

Abstract: The storage of hydrogen is important for the development of hydrogen energy, especially for the storage of liquid hydrogen, which has been receiving more and more attention recently. In order to study the thermal insulation performance of variable-density multilayer insulation (VDMLI) structures under different working conditions at liquid hydrogen temperatures without incorporating a composite structure, we established a heat transfer model based on a layer-by-layer calculation method. Then, we carried out numerical calculations to analyze the influence of the total number of layers, the thermal boundary temperature, and vacuums on the performance of MLI at liquid hydrogen temperatures. To investigate the optimization of variable-density configurations on the thermal insulation performance of VDMLI and to obtain accurate variable-density configurations, we proposed a variable-density configuration method based on the control variable method and the insertion by region method. The results indicate that the optimal variable-density configuration is the insertion of 4 layers of radiation shields in the low-density region, 15 layers in the medium-density region and 38 layers in the high-density region. Compared with a uniform-density structure, the heat flux is reduced by 8.6%.

Keywords: liquid hydrogen temperature region; multilayer insulation; variable density; layer density; heat flux (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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