An Analysis on the Compressed Hydrogen Storage System for the Fast-Filling Process of Hydrogen Gas at the Pressure of 82 MPa

Ji-Qiang Li, Ji-Chao Li, Kyoungwoo Park, Seon-Jun Jang and Jeong-Tae Kwon
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Ji-Qiang Li: Department of Mechanical Engineering, Graduate School, Hoseo University, Asan 31499, Korea
Ji-Chao Li: Department of Mechanical Engineering, Graduate School, Hoseo University, Asan 31499, Korea
Kyoungwoo Park: Division of Mechanical & Automotive Engineering, Hoseo University, Asan 31499, Korea
Seon-Jun Jang: Division of Mechanical & Automotive Engineering, Hoseo University, Asan 31499, Korea
Jeong-Tae Kwon: Division of Mechanical & Automotive Engineering, Hoseo University, Asan 31499, Korea

Energies, 2021, vol. 14, issue 9, 1-18

Abstract: During the fast-filling of a high-pressure hydrogen tank, the temperature of hydrogen would rise significantly and may lead to failure of the tank. In addition, the temperature rise also reduces hydrogen density in the tank, which causes mass decrement into the tank. Therefore, it is of practical significance to study the temperature rise and the amount of charging of hydrogen for hydrogen safety. In this paper, the change of hydrogen temperature in the tank according to the pressure rise during the process of charging the high-pressure tank in the process of a 82-MPa hydrogen filling system, the final temperature, the amount of filling of hydrogen gas, and the change of pressure of hydrogen through the pressure reducing valve, and the performance of heat exchanger for cooling high-temperature hydrogen were analyzed by theoretical and numerical methods. When high-pressure filling began in the initial vacuum state, the condition was called the “First cycle”. When the high-pressure charging process began in the remaining condition, the process was called the “Second cycle”. As a result of the theoretical analysis, the final temperatures of hydrogen gas were calculated to be 436.09 K for the first cycle of the high-pressure tank, and 403.55 for the second cycle analysis. The internal temperature of the buffer tank increased by 345.69 K and 32.54 K in the first cycle and second cycles after high-pressure filling. In addition, the final masses were calculated to be 11.58 kg and 12.26 kg for the first cycle and second cycle of the high-pressure tank, respectively. The works of the paper can provide suggestions for the temperature rise of 82 MPa compressed hydrogen storage system and offer necessary theory and numerical methods for guiding safe operation and construction of a hydrogen filling system.

Keywords: hydrogen storage tank; compressed hydrogen; high-pressure filling; thermodynamics; heat transfer (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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