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International Conference on Innovative Applied Energy    

E-Proceedings ISBN: 978-1-912532-05-6

St Cross College, University of Oxford, United Kingdom



First Assessment of Potential Geological Reservoirs for Compressed Air Energy Storage in Portugal



Catarina R. Matos (1), Júlio F. Carneiro (2) and Patrícia Pereira Da Silva (3)

1. MIT Portugal Doctoral Program, University of Coimbra, and ICT-Institute of Earth Sciences, University of Évora, Portugal

2. ICT- Institute of Earth Sciences, School of Science and Technology, Institute for Research and Advanced Training, University of Évora, Portugal

3. INESC Coimbra - Institute for Systems Engineering and Computers at Coimbra, and CeBER - Center for Business and Economics Research and Faculty of Economics, University of Coimbra, Portugal


Paper Abstract

The increasing use of intermittent renewable energies bring challenges in their integration into the electrical grid. One of the solutions that may solve those challenges is energy storage. Compressed air energy storage (CAES) is a large-scale energy storage technology which may be a viable alternative to store energy in the form of pressurized air in times of excess of renewable energies power production. In this paper, we assess the geological resource potential as possible underground reservoirs for compressed air energy storage in Portugal. The suitable geological formations studied are host rocks, salt formations and saline aquifers. Their main geological characteristics, location and GIS spatial representation are done, as well as their suitability for CAES. Geological possible reservoirs were identified, mapped and are cross-checked with surface constraints and criteria such as renewable energy facilities. This work contributes to determine the potential sites which may hold reservoirs for the possible development of a CAES project in Portugal as a large-scale energy storage system in order to achieve a future global integration of renewables and help to solve the challenges they bring to the grid

Paper Keywords
Compressed air energy storage, host rocks, salt formations, saline aquifers, renewable energy.
Corresponding author Biography

Catarina R. Matos is a Ph.D. candidate in Sustainable Energy Systems in MIT Portugal Doctoral Program at University of Coimbra, Portugal. Her previous degree is in Geology, and she also has a Master degree in Geological Cartography. She is developing research in geological energy storage for the integration of renewable energies, more specifically in Compressed Air Energy Storage.

The International Conference on Innovative Applied Energy (IAPE’18)