Optimal pressure configuration of 70 MPa cascade hydrogen refueling station based on least squares method

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Abstract The optimal pressure configuration of the 70 MPa cascade hydrogen refueling station is quickly and accurately solved by using the least squares method (LSM), and the optimal pressure levels of each hydrogen storage tank are obtained. Firstly, the mathematical models of hydrogen state, on-board hydrogen cylinder, hydrogen dispenser and compressor are established under cascade hydrogen refueling system, and compared with the experimental data at 5.5 MPa initial pressure and 298 K ambient temperature, the correctness of the models is verified. Secondly, the energy consumption model of the hydrogen filling process is established, and the pressure configuration is converted into the optimization of pressure ratio. The optimal pressure ratio formula is obtained based on the LSM. Finally, using LSM, for the cascade hydrogen refueling station whose hydrogen source is 20 MPa hydrogen tube trailer, the optimal pressure of the three-stage hydrogen refueling station is 30, 57 and 88 MPa, respectively. Compared with the traditional sequential search method, the total energy consumption is reduced by about 2.4%. The energy efficiency of cascade hydrogen refueling is improved by 36% compared to traditional single-stage hydrogen refueling stations.

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	ZHONG Yongbin
	WU Xuan
	OUYANG Yanchao
	ZHU Qiao
	YANG Jin

Keywords： 70 MPa cascade hydrogen refueling station on-board hydrogen cylinder least squares method pressure configuration

Received 2024-06-12;

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ZHONG Yongbin, WU Xuan, OUYANG Yanchao, ZHU Qiao, YANG Jin.Optimal pressure configuration of 70 MPa cascade hydrogen refueling station based on least squares method[J] Chemcial Industry and Engineering, 2024,V41(5): 114-120

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