A comparative analysis of numerical approaches for hydrogen storage in salt cavern during injection-stand-withdrawal process with brine impact

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2025-10-07 DOI:10.1016/j.tust.2025.107159

Wanrui Hu , Wenjing Li , Tao Sun , Chengyu Ma , Xiuxiu Miao

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引用次数: 0

Abstract

Underground salt caverns have been widely used for natural gas storage for decades. However, their suitability and applicability for hydrogen storage remains uncertain due to limited engineering experience. To assess the feasibility of salt caverns for hydrogen storage, a critical challenge lies in understanding the thermodynamic behavior of hydrogen under cyclic injection-and-withdrawal conditions.This study presents a coupled thermodynamic and thermomechanical model of a salt cavern, integrating the transport mechanism of cycling hydrogen and the surrounding wall of salt cavern. A comparative analysis of the thermodynamic properties of hydrogen and methane is conducted, and multiple operational scenarios are simulated to evaluate the effects of: initial temperature, injection/withdrawal rates, and heat transfer characteristics. Key findings reveal that higher storage pressures are required to maximize hydrogen capacitycompared to methane. As bottom brine occupies a large portion of storage volume, the impact of brine on hydrogen solubility is investigated based on the modified experiment correlation and thermomechanical model. The results of this study offer valuable guidance for the design and practical implementation of salt caverns as large-scale hydrogen storage systems, supporting the transition to sustainable energy solutions.

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考虑卤水冲击的注—站—采过程中盐穴储氢数值方法的对比分析

几十年来，地下盐洞被广泛用于天然气储存。然而，由于工程经验有限，它们在储氢方面的适用性仍然不确定。为了评估盐洞储氢的可行性，一个关键的挑战在于理解氢在循环注入和提取条件下的热力学行为。结合循环氢的输运机制与盐洞壁的关系，建立了盐洞的热力学和热力学耦合模型。对氢气和甲烷的热力学特性进行了比较分析，并模拟了多个操作场景，以评估初始温度、注入/提取速率和传热特性的影响。关键发现表明，与甲烷相比，氢气容量最大化需要更高的储存压力。由于底部卤水占储水容积的很大一部分，基于修正的实验关联和热力学模型，研究了卤水对氢溶解度的影响。本研究的结果为盐穴作为大规模储氢系统的设计和实际实施提供了有价值的指导，支持向可持续能源解决方案的过渡。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.