Review on studies of the emptying process of compressed hydrogen tanks |
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Authors: | Lei Zhao Quanliang Zhao Jie Zhang Shuo Zhang Guangping He Mengying Zhang Tingting Su Xu Liang Can Huang Wenhui Yan |
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Affiliation: | 1. School of Mechanical and Materials Engineering, North China University of Technology, Beijing, 100144, China;2. Beijing JONTON Hydrogen Tech. Co., Ltd, Beijing, 102299, China |
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Abstract: | Compressed hydrogen tanks are now widely used for onboard hydrogen storage in fuel cell vehicles (FCVs). However, because of the high storage pressure and the low thermal conductivity of carbon fibre reinforced polymer (CFRP), the emptying of such tanks during driving or emergency release can cause a significant temperature decrease and result in an in-tank gas temperature below the low safety temperature limit of ?40 °C even in warm weather. Once the gas temperature within the tank is lower than ?40 °C, the sealing elements at the boss of the tank may fail, and glass transition of the polymer liner of the type IV tank may occur; both can cause hydrogen leakage and severe safety problems. In this paper, the heat transfer correlations, thermodynamic analyses, computational fluid dynamics (CFD) simulations, experimental studies, and thermal management methods associated with the emptying process of compressed hydrogen tanks are comprehensively reviewed. Future research directions on this topic are suggested. |
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Keywords: | Compressed hydrogen tanks Emptying Temperature decrease Thermal management |
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