Marine renewable energy (MRE), also known as ocean energy or marine and hydrokinetic energy (MHK), refers to the various ways to generate electricity from the world’s oceans, seas, and rivers. Movement of water occurs naturally in these bodies of water in the form of waves, tides, and currents. Although many are in early stages of research and development, there is a wide variety of MRE technologies capable of generating electricity from the movement of water, as well as from differences in water temperature and salinity.
The relevant technologies can be classified into the following categories:
- Wave Energy
- Tidal Energy
- Ocean Current Energy
- Ocean Thermal Energy Conversion (OTEC)
- Salinity Gradient Energy
- Riverine Energy
The environmental concerns associated with MRE technologies vary substantially based on the technology type, device design, and location. The primary environmental concerns typically encompass animal collisions with dynamic devices, impacts from underwater noise, and concerns about changes to the physical environment.
Please note: Tethys classifies offshore wind energy separately from MRE.
Photo: Simec Atlantis