基于最小二乘法的70 MPa梯级加氢站压力配置优化

摘要利用最小二乘方法(LSM)快速准确求解70 MPa梯级加氢站最适宜的压力配置,并获得各级储氢罐的最适宜压力级。首先在梯级加氢系统下建立氢气状态、车载储氢瓶、加氢机和压缩机的数学模型,并与初始压力为5.5 MPa、环境温度为298 K的实验数据进行对比,验证了模型的正确性。其次建立加氢站补氢过程的能耗模型,将压力配置转换为压力比优化问题,基于LSM方法,获得了最适宜压力比公式。最后针对氢源为20 MPa长管拖车的梯级加氢站,利用LSM可得三级加氢站的最适宜压力分别为30、57和88 MPa。与传统序列搜索方法相比,总能耗降低了约2.4%。而与传统单级加氢站相比,梯级加氢的能效提高了36%。

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	钟勇斌
	吴轩
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	祝乔
	杨锦

关键词： 70 MPa梯级加氢站车载储氢瓶最小二乘法压力配置

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.

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

Received 2024-06-12;

Corresponding Authors: 杨锦,高级工程师,E-mail:yangj@dbc.com.cn。 Email: yangj@dbc.com.cn

About author: 钟勇斌(1988-),男,工程师,现从事储氢、加氢技术方面的研究。

引用本文:

钟勇斌, 吴轩, 欧阳彦超, 祝乔, 杨锦.基于最小二乘法的70 MPa梯级加氢站压力配置优化[J]. 化学工业与工程, 2024,41(5): 114-120

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, 2024,41(5): 114-120

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