HONOLULU — Makai Ocean Engineering recently announced two endeavors on the Big Island to help the Navy’s 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 Test
HONOLULU — Makai Ocean Engineering recently announced two endeavors on the Big Island to help the Navy’s 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 Test Facility in Kona. The second includes the installation and operation of the turbine, and the design and testing of two new OTEC heat exchangers.
“Makai Ocean Engineering is committed to developing alternative energy solutions that are impactful and ahead of the curve,” Makai Vice President Billy Pieper said in a press release. “Due to our partnership with the Navy, I believe Makai will help achieve a more sustainable future with the solutions we are pursuing.”
The first endeavor, which will result in a turbine-generator delivered to the site, will be completed by February 2014. The projected funding requirements are approximately $1 million. During the second phase, Makai will install the turbine and begin operation testing.
OTEC project manager Michael Eldred said the technical benefits of having a turbine are huge.
“Besides the obvious benefit of once again including OTEC power on the grid, it will also validate the results from our OTEC models and allow us to fine-tune our control systems,” Eldred said in the release.
The new generator would result in the world’s only operational OTEC plant since 1998 and is likely to create a steppingstone to commercial-size renewable energy supplies for Navy and Department of Defense bases in Hawai‘i and Guam.
Included in the second phase effort are the development of two new OTEC-optimized heat exchangers and the continuation of corrosion testing, now in its fourth year.
Due to their enormous size, heat exchangers are one of the most expensive components in an OTEC power plant. A small increase in efficiency therefore dramatically drives down cost.
Makai’s focus is to optimize the heat exchanger design by reducing material and fabrication costs, improving thermal efficiency and maximizing its life in the corrosive seawater environment. An estimated $3.6 million is slated for the project.
Over the past three years, Makai Ocean Engineering, Inc. has received Office of Naval Research funding to conduct research in key areas of OTEC heat exchanger development at the OTEC Test Facility site at the Natural Energy Laboratory of Hawai‘i Authority. The overall goal is to determine a baseline heat exchanger design for a future large-scale OTEC power plant useful for U.S. Navy and commercial application.
The Navy’s goal is that half of its total energy consumption ashore will come from alternative sources by 2020. The Navy is approximately 700 megawatts short of meeting this goal.
OTEC is a process that can produce electricity by using the temperature difference between deep cold ocean water and warm tropical surface waters. OTEC plants pump large quantities of deep cold seawater and surface seawater to run a power cycle and produce electricity.
Robbie Alm, executive vice president of Hawaiian Electric Company, has called OTEC a “gamechanger” because it is around-the-clock renewable power. Demonstration of OTEC-generated electric power will help spur commercially-funded technology development needed for large scale expansion. Lockheed Martin Corporation is developing OTEC heat exchangers and cold water pipes, with the ultimate goal of large scale commercialization.
