UNDERGY is structured 6 research activities, each of them led by a different participating partner.
The objective of this activity, led by the company Gessal, is to investigate and determine the storage capacity of green hydrogen in the peninsular underground, setting out a tool that allows the suitability analysis of geological sites and facilities (resource, feasibility, potentiality.
The company Petroleum will address the feasibility of storing green H2 on a pilot structure. A depleted natural gas field located in the Aljarafe (Seville) will be analyzed on a laboratory scale to investigate the reactions of the mixture of gases (H2-CO2-CH4) and containing rocks. In addition to the feasibility of storing H2, the potential methanization that could occur in the underground by the joint injection of green H2 and captured CO2 and activity of the in situ bacteria will be investigated. Finally, a 4D modelling of the pilot storage will be carried out.
Furthermore, the possibility of scaling the results obtained in this activity to other depleted deposits of similar characteristics will be assessed.
Led by the company H2B2, the objective of the activity is to analyze the main technologies of the electrolytic process to produce H2 from the integration of different sources of renewable electricity generation and water qualities. The activity aims at the conceptual design of a new 20 MW electrolyzer suitable for operating on large energy storage (geological type) and designed ad hoc to function under the operating parameters of renewable energy.
The objective of this activity, led by Técnicas Reunidas, is to investigate the possibilities of converting the gas facilities of the pilot site for the use of hydrogen gas and thetechnical-economic optimization of the new necessary processes. Conceptual study and design validated in the laboratory according to an initial transition scenario in which mixtures of H2 (20%) and CH4 (80%) are managed, and a final scenario that will entail the specific design for the management of pure hydrogen gas (100%).
The objective of this activity, led by the company Ayterra, is to evaluate the potential risks related to the storage of green hydrogen in the underground. Environmental, hydrogeological, geotechnical and geomorphological aspects, including seismic hazard, will be addressed, taking into account the processes of electrolysis and gas transfer in surface installations (H2-CO2-CH4). It will include the design of an environmental monitoring network for a future operational phase.
Considering the potential for in situ methanation determined in the laboratory, the CO2 supply, the emission reduction capacity associated with the pilot storage and the eventual use of the existing infrastructure will be evaluated.
The objective of this activity, led by Gas Natural Comercializadora, is to propose an efficient integrated energy management system, combining renewable generation and seasonal storage of green H2. To this end, various technical-economic studies will be carried out against different scenarios of the energy system, pursuing the avoidance of surplus and the optimal use of renewable resources, in which the degree of penetration of renewable generation of the Integrated National Energy and Climate Plan (PNIEC) will be taken as a reference.
In addition, a Geographic Information System will be developed that will collect the seasonal storage capacity in the underground, as well as various relevant information of the energy system such as data on generation, demand, renewable resource, networks, etc.
