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Conversion systems
The technology is based on the conversion of ocean energy into electricity or hydraulic power for desalination. It has differentiated concepts, being able to generate electricity via hydraulic or mechanical systems. The electric generation system is more flexible when compared to the primary conversion system (pumping), since the first is positioned on solid ground, while the second one is located in the sea. The transmission of the energy that comes from the conversion system can be done through undersea cables or hydraulic tubing, which leads to a reduction in production costs.

Wave energy converter
Nearshore conversion system

SEAHORSE's nearshore converters concept works without the use of mechanical arms. They are attached to fixed structures on the bottom of the sea. In certain situations, the device requires a telescopic hydraulic system to compensate for tidal variations. The high pressure equipments and the group of electric generation are installed inside one of the floats (or on a fixed platform on the bottom of the sea, or still even in land, if the distance is economically viable). They receive pressurized water from all floats interconnected. The total capacity of a plant is defined by the number of pumping modules running simultaneously. Arrangements can be either done in an in-line configuration or, when it's dealing with a large number of modules, in rectangular or checkered disposal with several parallel lines. If the generation system is located on a fixed offshore platform, the transmission of electricity to the local network is made via submarine cables.

SEAHORSE's offshore converters operate fully floating in deepwater. The high pressure equipment and the group of electric generation are installed inside one of the floats and receive pressurized water from all other floats (pumping modules). The total power of the plant is determined by the number of pumping modules running simultaneously.
Offshore conversion system


The plant can maintain its position in the ocean due to anchoring cables fixed on the bottom of the ocean and by a dynamic positioning system (own motors controlled by satellite data). The transmission of the electricity to the nearest network on land is made via submarine cables.

Tidal energy converter
Conversion System - Tidal

The plant for electricity generation or desalination operates by turbines submerged in rivers or oceans. These turbines may operate with the basis supported in the riverbed or in the bottom of the sea. The height of the body of the turbine in relation to the water surface is optimized in order to achieve higher speeds of currents, without navigation injury. In areas with very deep waters, where there is no conflict with the navigation, there is another way to proceed: the turbines can be maintained suspended and fixed at the bottom part of a floating structure, that is found anchored in the bottom of the ocean or in the bottom or margins of the river.

The equipment for the generation of electricity and/or desalination are installed either at the dry edge of rivers, or on a fixed platform in the bottom of seas. These different modalities maintain the equipment for electricity generation and desalination always in a dry place, in order to facilitate operation and maintenance.

Desalination
Conversion System with Desalination

The concept of ocean energy converters developed by SEAHORSE transforms the ocean energy into hydraulic energy by increasing the fluid pressure in an accumulator. In particular, the operation of the ocean energy converter consists on a floating body that drives a hydraulic pump to achieve the required pressure level. This pump sends the fluid at high pressure into a hydropneumatic accumulator. After this stage, the concept described can generate electricity or desalinate water by the process called reverse osmosis. That occurs due to the system versatility, which can operate at different pressure levels required for desalination of sea water (salinity levels of 35 ‰) or brackish water (content of about 3 ‰).