ABS is providing new technology qualification (NTQ) services for subsea ammonia storage technology from NOV Subsea Production Systems. The 200-m3 prototype subsea storage unit (SSU) is en route to NOV’s testing facility in Norway, where large-scale product validation tests are planned for later this summer.

The subsea storage system is part of a Joint Development Project (JDP) that includes ABS, NOV Subsea Production Systems, Equinor, The Research Council of Norway and The Net Zero Technology Centre. This project unites a group of industry leaders actively enabling an economical subsea storage solution for the market.

Also read: EUR 3 million grant for floating green hydrogen/ammonia project

Subsea storage system

The subsea energy storage system is based on NOV’s membrane-based storage solution for oil and chemicals and makes it possible to store maritime e-fuels, such as ammonia and e-methanol, enhanced oil recovery (EOR) chemicals and production chemicals, directly on the seafloor.

At water depths of over 100 metres and temperatures below 6°C, ammonia stays liquid, and membrane-based storage technology can store clean energy in the form of liquid ammonia as a hydrogen energy carrier. According to NOV it can offer economical storage of ammonia in liquid form while providing protection for both rig personnel and marine life.

This technology can be used in a variety of applications, like power storage for offshore assets, offshore fuelling stations for ships, renewable energy storage with offshore wind turbines, or common storage of ammonia for fertiliser plants.

Picture by NOV.

Also read: Strohm and Siemens Gamesa seek to transport green hydrogen by subsea pipes