World’s largest OTEC plant connected to grid

HONOLULU, HI – Makai Ocean Engineering celebrates the completion of the world’s largest operational Ocean Thermal Energy Conversion (OTEC) power plant with a dedication ceremony held Friday, August 21 at the Natural Energy Laboratory of Hawaii Authority (NELHA).

The OTEC power plant uses the temperature difference between the ocean’s cold deep water and warm surface water to generate clean, renewable electricity that is available 24 hours a day, 365 days a year. The NELHA-sited plant… Continue reading

Successful repair of NELHA’s 40-inch deep-seawater pipe

Recently the repair works on NELHA’s 40-inch deep-seawater pipe were successfully completed. Operating at 150M depth and using remotely operated vehicles, it was quite an undertaking.

The high-density 1.2-mile-long polyethylene pipe, installed in 1987, extends to depths of 2,000 feet. The pipeline is the backbone of the Natural Energy Laboratory of Hawaii Authority’s coldwater aquaculture and research projects.

Surveys of the pipeline in December 2007 showed the mooring bridles, which help hold the pipeline to… Continue reading

100 kilowatt turbine-generator for Kona test facility

Today, Makai Ocean Engineering issued a press release announcing two endeavors in assisting the Navy to reach its alternative energy goals. The first is the design, planning and procurement of a 100-kilowatt turbine-generator for the Hawai’i Ocean Thermal Energy Conversion (OTEC) Test Facility. The second project includes the installation and operation of this turbine-generator, as well as the design and testing of two new OTEC heat exchangers. “Makai Ocean Engineering is committed to… Continue reading

Honolulu Seawater Air Conditioning to Begin Construction of Largest Seawater District Cooling System

Honolulu Seawater Air Conditioning (HSAC) will utilize ocean thermal energy technology to provide air conditioning to as many as 40 large commercial buildings in the downtown area of Kakaako, Honolulu.  The deep seawater infrastructure with a rated cooling capacity of 25.000 tons will cool up to 40% of the urban area on the island of Oahu. With a budget of $250 million dollars, the construction will begin shortly. Multiple companies have already signed contracts… Continue reading

Draft Environmental Assessment for the proposed 1MWe demonstration plant at NELHA

OTEC International has published the Draft Environmental Assessment (DEA) for the proposed one megawatt demonstration plant at NELHA’s Hawaii Ocean Science and Technology (HOST) Park at Keahole, Hawaii Island. The assessment which has been prepared at the request of NELHA, looks at the environmental implications at the facility’s proposed site. The comment period is open till August 22, 2012.

The proposed 1MWe OTEC facility will serve as a test platform for

OTEC International LLC chosen for Hawaii OTEC Demonstration

OTEC International LLC has been selected to build a 1 MW OTEC at NELHA, Hawaii. The RFI for this went out recently, with a very short deadline, so we were wondering if the choice wasn’t a given from the start. The main investor in OTEC International has also invested in Seasolar Power earlier.

The OTEC demonstration plant is planned to be built on six acres of NELHA’s Hawai’i Ocean Science and Technology (HOST) Park. The… Continue reading


The Natural Energy Laboratory of Hawaii Authority (NELHA) has published an RFI seeking submissions from firms and or government agencies interested in developing a 1 megawatt Ocean Thermal Energy (OTEC) project at its 870 acre Hawaii Ocean Science and Technology (HOST Park) in Kailua-Kona on the Island of Hawaii.

Interestingly enough, the RFI was published on 30 September 2011, all questions must be answered by 14 October and the submission must be in by… Continue reading

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