期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 42, 期 26, 页码 16657-16666出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2017.05.076
关键词
Underground hydrogen storage; Power-to-gas; Renewable hydrogen; Geological energy storage; Saline aquifer
资金
- CO2-REACT People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme under REA [317235]
- Spanish Ministry of Science [12-B6ch0626447]
Renewable energies fluctuate, resulting in temporary mismatches between demand and supply. The conversion of surplus energy to hydrogen and its storage in geological formations is one option to counteract this energy imbalance. This study evaluates the feasibility of seasonal storage of hydrogen produced from wind power in Castilla-Leon region (northern Spain). A 3D multiphase numerical model is used to test different extraction well configurations during three annual injection-production cycles in a saline aquifer. Results demonstrate that underground hydrogen storage in saline aquifers can be operated with reasonable recovery ratios. A maximum hydrogen recovery ratio of 78%, which represents a global energy efficiency of 30%, has been estimated. Hydrogen upconing emerges as the major risk on saline aquifer storage without using other cushion gases. However, shallow extraction wells can minimize its effects. Steeply dipping geological structures are key for an efficient hydrogen storage. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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