WP 2: Short-cycle energy storage efficiency

1. Introduction

The subsurface can store surplus renewable energy as hydrogen (H2) or other energy carriers to balance offshore power shortages. This WP focuses on impact of subsurface dynamics and bio-geochemical reactions on short-term energy storage performance.

2. Research goals

Assess the impact of coupled transport for subsurface energy storage through multi-scale flow tests that quantify changes in hydrogen storage capacity, deliverability and injection over several cycles. The role of bio-geochemical reactions will be investigated and thoroughly mapped. Laboratory findings will guide formulation of appropriate biological processes to compile a fully coupled numerical model, validated with laboratory data.

Coupled transport processes, including hysteresis and bio-geochemical reactions, will be modeled to quantify key parameters that impact deliverability/injection rates and energy storage efficiency. Modeling efforts will be benchmarked against unique laboratory infrastructure at the core and room-scale to validate across length-scales and relevant geological features such as sealing vs reservoir lithologies and faults and fractures.

3. Main Delivery

Identify appropriate short-cycle energy storage options for the NCS using a multi-scale approach that integrate experimental and modeling efforts. To accurately assess short-term energy storage and strategic pressure management options on the NCS, parameters and limitations must be carefully mapped in relevant formations.