Marine Renewables2014: JAN
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September 2013 Issue
EPA Verifies XeroPoint After Testing in California Ports
The U.S. Environmental Protection Agency (EPA) has verified the XeroPoint Hybrid Tug Retrofit System (XeroPoint) pioneered by Foss Maritime of Seattle, Washington, and Aspin Kemp & Associates (AKA) of Owen Sound, Canada. Tests were conducted in the ports of Long Beach and Los Angeles in California.
The hybrid retrofit Campbell Foss has been working in southern California since 2012, using ultralow-sulfur diesel fuel. On the Campbell Foss, the XeroPoint system integrates electrical and mechanical devices on board to provide optimal modes of operation for power and propulsion. The hybrid system strives to eliminate the unnecessary idling of diesel engines by determining the most efficient configuration of the electrical and mechanical devices on board.
The University of California, Riverside, which has been testing the Foss Maritime/AKA system, found a fuel savings of roughly 30 percent, a 25 percent particulate matter reduction, a 30 percent reduction in nitrogen oxides produced during combustion, a 30 percent reduction in carbon dioxide and a 35 percent reduction in carbon monoxide.
The ports of Long Beach and Los Angeles and the California Air Resources Board have partnered with Foss Maritime and AKA on the XeroPoint hybrid retrofit system.
“The San Pedro Bay port complex and our neighbors have been benefiting from Foss Maritime/AKA hybrid technology since 2009, when the world’s first hybrid tug was home-ported here,” said Chris Cannon, director of environmental management for the Port of Los Angeles.
BOEM Finds No Environmental Impact From Florida MHK Testing
The U.S. Bureau of Ocean Energy Management (BOEM) made available a revised environmental assessment (EA) and its finding of no significant impact (FONSI) for lease issuance to conduct marine hydrokinetic (MHK) technology testing offshore Florida.
Florida Atlantic University’s Southeast National Marine Renewable Energy Center (FAU SNMREC) applied to BOEM in August 2011 for a lease to deploy experimental demonstration devices. The proposed lease area is contained within three Outer Continental Shelf blocks and located approximately 9 to 15 nautical miles offshore Fort Lauderdale, Florida.
This is the first lease application that BOEM has received to test ocean current energy equipment.
In April 2012, BOEM published an EA for a 30-day public review period. The EA considered potential environmental impacts and socioeconomic effects from issuing a lease and associated activities, including surveys, installing mooring and telemetry buoys, and testing of equipment designed to use the Florida current to generate electricity.
In order to address the comments received, incorporate new information and activities and fully consider the additional impacts associated with the new proposed activities, BOEM revised the EA.
Based on the analysis contained in the revised EA, BOEM issued a FONSI, which concluded that the environmental impacts associated with the proposed action and alternatives would not significantly impact the environment.
GL Supports Wave Energy Converter Testing in Hawaii
GL Garrad Hassan (Bristol, England) has begun a project for the Hawaii Natural Energy Institute at the University of Hawaii (HNEI-UH) supporting the institute’s Hawaii National Marine Renewable Energy Center (HINMREC) wave energy testing program.
HINMREC, under funding from the Wind and Water Power Program of the U.S. Department of Energy, is working in collaboration with the U.S. Navy to develop a wave energy test site (WETS) at the Marine Corps Base Hawaii (MCBH) in Kaneohe, Oahu.
WETS will provide a location for the ocean testing and demonstration of wave energy converter (WEC) devices. WEC technologies seek to convert the energy associated with the oscillatory motion of ocean surface waves into a more useful form—typically electricity. The WETS facility currently has one test berth established in 30-meter deep water, and is being expanded with two additional berths at 60- and 80-meter depths, with connection to the MCBH electricity grid.
HINMREC’s role at the WETS facility includes the evaluation of WEC system performance. To facilitate this responsibility, GL Garrad Hassan’s wave energy team will provide wave energy test protocols, support HNEI-UH with processing performance data and conduct independent numerical model verification exercises for HNEI-UH’s WEC operational models over the next two years.
Alstom Tidal Turbine Reaches 1-Megawatt, 10 Megawatt-Hours
From its immersion in January 2013 at the European Marine Energy Centre in Orkney, Scotland, Alstom’s (Levallois-Perret, France) full-scale tidal device has reached the full nominal power of 1 megawatt after a series of gradual increases in power. The grid-connected turbine has now generated more than 10 megawatt-hours of electricity in actual operating conditions.
The tidal turbine has been tested in different operational conditions, showing a reliability and performance in line with its design models. The next step of testing will be to demonstrate the full range of autonomous running capabilities of the turbine, continue with the planned maintenance and gather evidence for certification. The endurance and reliability will also be tested into 2014. Tests in pilot farms will follow prior to the start of full commercial production.
Alstom’s tidal turbine has a 22-meter-long nacelle, weighs 150 tonnes, has an 18-meter-diameter rotor with three pitchable blades, and can float. Buoyancy enables the turbine nacelle to be easily towed to and from the point of operation and attached to its preinstalled foundation. This avoids the need for specialist vessels and divers, minimizing installation and maintenance costs and reducing the time frame to install or retrieve the turbine. The unit operates fully submerged with no surface piercing part, in about 40 meters depth. The nacelle can rotate around vertical axis to face the incoming tide at an optimal angle to extract the maximum energy potential.
2013: JAN | MARCH | MAY | JULY | SEPT | NOV