The National Energy Administration released the first batch of pilot hydrogen energy projects in the energy sector, with the Daye Deep Underground Hydrogen Energy Storage System pilot project being selected.

Recently, the Daye Deep Geological Hydrogen Energy Storage System Pilot Project was selected as one of the first batch of national hydrogen energy pilot projects in the energy sector (one of 41 nationwide). It represents a "groundbreaking initiative" in hydrogen storage and transportation in China and serves as the core component of Daye's "Integrated Green Electricity and Green Hydrogen Production, Storage, Refueling, and Utilization Project."

Guided by the principle of "full-link application and integrated operation," the project breaks away from the traditional high-pressure storage tank model. It leverages a repurposed mine mountain to create a rock cavern hydrogen storage facility, utilizing technologies such as composite lining construction and intelligent management. By tackling core challenges like hydrogen sealing and smart control, the project aims to promote the localization of hydrogen storage equipment and achieve self-sufficiency in key processes. Upon completion, it will become China's first engineering validation platform for rock cavern hydrogen storage.

This initiative fills the gap in deep geological hydrogen storage engineering within China. By integrating photovoltaic systems with hydrogen storage facilities, it is expected to reduce carbon emissions by 34,500 mt annually. It addresses bottlenecks across the "production-storage-transportation-utilization" chain, providing a replicable model for large-scale hydrogen utilization and urban low-carbon transformation.

Pilot Background and Objectives: The selection was based on documents such as the "Medium and Long-Term Development Plan for the Hydrogen Energy Industry (2021-2035)," aiming to innovate hydrogen energy management models, explore diversified development pathways, form replicable and scalable experiences, and support the development of the entire hydrogen energy "production-storage-transportation-utilization" chain.

Technical Features and Innovations: Guided by the principle of "full-link application and integrated operation," the project breaks away from the traditional high-pressure spherical tank model. It utilizes a repurposed mine mountain to construct a rock cavern hydrogen storage facility, employing technologies like composite lining storage construction and intelligent management. Focusing on core aspects such as hydrogen sealing and smart control, it is dedicated to achieving full industry chain localization of hydrogen storage equipment and self-sufficiency in core processes. Upon completion, it will become China's first engineering validation platform for rock cavern hydrogen storage.

Core Value and Impact:

Technological Breakthrough: It fills the domestic gap in the engineering application of deep geological hydrogen storage technology. Compared to existing international salt cavern storage (e.g., three operational in the US, one in the UK), it pioneers a new path using rock caverns;

Industry Chain Integration: By linking the mine's PV power generation system with the rock cavern hydrogen storage facilities, it addresses key bottlenecks in the "production-storage-transportation-utilization" chain, with an estimated annual reduction of 34,500 mt in CO₂ emissions;

Demonstration Significance: It enhances green hydrogen utilization efficiency and energy reserve capacity, providing a replicable model of "underground space utilization" for urban low-carbon transformation, supporting large-scale hydrogen utilization and strategic reserves.