An Ageing Test Standards Analysis on Thermoplastic Liners of Type IV Composite Hydrogen Storage Tanks

Jun Li, Rongrong Lv (), Chunlin Gu, Yitao Liu, Jiepu Li and Xiang Li ()
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Jun Li: China Special Equipment Inspection and Research Institute, Beijing 100029, China
Rongrong Lv: China Special Equipment Inspection and Research Institute, Beijing 100029, China
Chunlin Gu: China Special Equipment Inspection and Research Institute, Beijing 100029, China
Yitao Liu: China Special Equipment Inspection and Research Institute, Beijing 100029, China
Jiepu Li: China Special Equipment Inspection and Research Institute, Beijing 100029, China
Xiang Li: China Special Equipment Inspection and Research Institute, Beijing 100029, China

Energies, 2023, vol. 16, issue 6, 1-14

Abstract: The liner of a carbon fiber fully reinforced composite tank with thermoplastic liner (type IV) works in a hydrogen environment with varying temperature and pressure profiles. The ageing performance of the thermoplastic liner may affect hydrogen permeability and the consequent storage capacity, degrade the mechanical properties, and even increase the leakage risks of type IV tanks. In this paper, both testing procedures and evaluation parameters of an ageing test in a hydrogen environment required in several standards are compared and analyzed. Hydrogen static exposure in a high-temperature condition with a constant temperature and pressure is suggested to be a reasonable way to accelerate the ageing reaction of thermoplastic materials. A total of 192 h is considered a superior ageing test duration to balance the test economy and safety. The ageing test temperature in the high-temperature condition is suggested as no lower than 85 °C, while the upper limit of test pressure is suggested to be 1.25 NWP. In addition, the hydrogen permeation coefficient and mechanical properties are recognized as important parameters in ageing performance evaluation. Considering the actual service conditions, the influence of temperature/pressure cycling, depressurization rate, and humidity on the ageing performance of thermoplastics in hydrogen are advised to be investigated experimentally.

Keywords: hydrogen storage tank; type IV composite tank; thermoplastic liner; ageing test; standard (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: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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