SEA-TITAN project related news

Remora, the innovative storage system for offshore wind energy

Segula Technologies, an international engineering consulting group, has presented Remora, an innovative project for the storage of offshore electrical energy that uses compressed air as the main resource for storing energy.


Remora was born in an environment in which practically most energy storage concepts and solutions are designed for a terrestrial installation. Segula Technologies’ new solution uses a hydraulic system based on water and air to store and distribute overproduced energy in tanks installed on the sea floor.

This system is applicable to offshore wind farms, as well as other energy sources, and is currently in the final testing phase. The construction and commissioning of the first pilot, with a power of 10kW in the laboratory, is scheduled for July 2019.

“The marine environment offers unique and profitable characteristics with respect to terrestrial facilities, while avoiding some of the problems of safety, environment, ecology and social acceptance that has to make them on land,” says David Guyomarc’h, head of marine energy Segula Technologies and coordinator of the project. “Remora is a system with multiple benefits, among which the minimum visual impact of the installations and the high energy efficiency, over 70%, stand out”.

How REMORA works

The storage system consists of a floating platform that includes all the conversion equipment and submarine tanks placed at the bottom of the sea that store the compressed air.

The floating platform of the Remora system converts electrical energy into compressed air and vice versa, according to the energy needs of the moment. The reversible energy chain that converts electricity and compressed air through the Remora process consists of electrical and electromechanical equipment, pump turbines and compression chamber. The platform is connected to the electricity grid by means of a high-voltage submarine electric cable and the reservoir by means of a compressed air pipe. The Remora project is efficient and its performance is 70% higher than with other systems.

On the other hand, the tanks on the seabed are dedicated to the storage of compressed air at constant pressure and do not convert any energy. The Remora technology is adapted to a depth of between 70 and 200 metres.

Modularly designed, this innovative model enables the serial development of all necessary equipment and significantly reduces manufacturing costs, while optimizing its implementation. At present, the usual Remora configurations are foreseen with a ratio of 15 tanks per platform. This would mean 15 MW – 90 MWh – 6 hours of unloading.

Segula Technologies is an engineering consulting group with international presence specialized in different industrial sectors such as wind, aerospace, automotive, railway, naval, pharmaceutical and petrochemical. Present in Spain since 2002, the company currently employs more than 1,150 people in our country alone in 12 cities and more than 12,000 employees in 140 locations around the world, in 30 countries.

“The wind sector is key to meeting the European target of 32% of energy consumption from renewable sources by 2030, according to official sources. At Segula Technologies, we are at the forefront of avant-garde projects that could become benchmarks to help meet the objectives set by the institutions”, concludes Carlos Pilarte, general manager of Segula Technologies Spain.

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