Ocean Thermal Energy Conversion Station OceanBreeze Launches in Equatorial Pacific: Continuous Power from Temperature Difference Between Surface Warm Water and Deep Cold Water

Ocean Thermal Energy Conversion Station OceanBreeze Launches in Equatorial Pacific

On September 14, 2030, U.S. renewable energy company Ocean Power Technologies announced that its OceanBreeze ocean thermal energy conversion (OTEC) power platform has officially entered commercial operation near Tarawa Atoll in the Republic of Kiribati.

OceanBreeze uses the temperature difference between warm tropical ocean surface water (approximately 28 degrees Celsius) and deep cold water (approximately 4 degrees Celsius) to drive an Organic Rankine Cycle power generation system. The platform draws cold water from the deep sea through a cold water pipe 2 meters in diameter and 1,000 meters long.

OceanBreeze has an installed capacity of 10 megawatts, with expected annual generation of approximately 70 million kilowatt-hours, sufficient to provide approximately 40% of electricity for Kiribati's population of about 120,000. Currently, 90% of Kiribati's electricity comes from imported diesel, and OceanBreeze will significantly reduce the country's energy import dependency.

Ocean Power Technologies CEO Robert Powers said OTEC's greatest advantage is "24/7 uninterrupted power generation," unaffected by weather and seasons. "In the equatorial Pacific, sea surface temperature differentials remain stable year-round, and OTEC can provide true baseload renewable energy."

The total investment for the OceanBreeze project is approximately $120 million, with the U.S. International Development Finance Corporation (DFC) providing $80 million in loan guarantees. The company plans to deploy five similar OTEC plants across Pacific island nations by 2032.

OTEC's main challenge is the installation and maintenance costs of the cold water pipe. OceanBreeze's cold water pipe uses a new high-strength polymer composite material with a designed lifespan of 30 years.