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Japan designs WEC turbine to tame shoreline waves

September 28, 2020 | aazfmwrl | No Comments

first_imgOIST turbines placed in an array (Image: OIST) Researchers from the Okinawa Institute of Science and Technology Graduate University (OIST) have outlined plans for a wave energy turbine that could provide protection for the shore while also generating power from the waves.The project being developed by OIST team involves placing turbines at key locations near the shoreline, such as nearby tetrapods or among coral reefs, to generate energy.Each location allows the turbines to be exposed to ideal wave conditions that allow them not only to generate clean and renewable energy, but also to help protect the coasts from erosion while being affordable for those with limited funding and infrastructure, OIST said.The turbines themselves are built to withstand the forces thrust upon them during harsh wave conditions as well as extreme weather, such as typhoons, according to OIST.Five-blade turbine design by OIST (Image: OIST)The blade design and materials are inspired by dolphin fins – they are flexible, and thus able to release stress rather than remain rigid and risk breakage, OIST informed.The five-blade turbine has a diameter of about 0.7 meters. Its blades rotate on their axis when influenced by ocean wave.The axis is attached to a permanent magnet electric generator that transforms the ocean wave energy into usable electricity. The ceramic mechanical seal protects the electrical components inside of the body from any saltwater leakage.OIST said the turbine has been designed to function for ten years before it needs replacing.The supporting structure for the turbines is also flexible and the turbines bend along their anchoring axes, according to Tsumoru Shintake, Professor at OIST.The turbines are also said to be built to be safe for surrounding marine life as their blades rotate at a carefully calculated speed that allows creatures caught among them to escape.One prime location to place turbines is in front of tetrapods at the shoreline. Tetrapods are concrete structures shaped somewhat like pyramids that are often placed along a coastline to weaken the force of incoming waves and protect the shore from erosion.At this location, the turbines transform the energy from incoming waves into usable electricity which in turn dissipates wave strength and protects the shoreline.OIST team (Photo: OIST)Coral reefs are another type of location with strong breaking waves. Arrays of small WECs could harness electricity from the vortex flow of breaking waves, OIST suggests.Replacing regular with ‘intelligent’ tetrapods and wave breakers, with turbines attached to or near them, would both generate energy as well as help to protect the coasts, Shintake said.The next step for Shintake and his team is to install the half-scale models of the turbine, with 0.35-meter diameter, for their first commercial experiment.The team will soon install two wave energy conversion (WEC) turbines in order to power LEDs for a demonstration.last_img read more

first_imgThe Carlyle Group has agreed to buy a significant minority share in the Spanish oil company Cepsa from Mubadala Investment company.Mubadala said on Monday that The Carlyle Group would acquire 30-40% stake in Compañía Española de Petróleos, Europe’s largest privately-owned integrated oil & gas company.The acquisition is based on an enterprise value of Cepsa of $12 billion. The Financial Times (paywall) has reported that the global investment firm based in Washington would pay $3.6 billion for a 30 percent share, with an option increase the ownership to 40 percent.The transaction is subject to customary regulatory approvals and is expected to close by end 2019. Mubadala will remain the majority shareholder of Cepsa.Marcel Van Poecke, Head of Carlyle International Energy Partners, said: “We are delighted to partner with Mubadala and Cepsa’s management team through our commitment to invest in Cepsa which offers such strong potential and future opportunities in the global energy sector.“We look forward to building upon Cepsa’s growth path for the benefit of their customers, suppliers, and employees. Our team has an established track record with a combination of energy sector, financial and operational capabilities as well as experience across the energy value chain from upstream through downstream, refining and marketing.”Cepsa operates in more than 20 countries and its assets include significant reserves contained in both the Umm Lulu and SARB fields located offshore Abu Dhabi. Cepsa is also a significant oil producer in Algeria and operates in Central and South America and South East Asia.last_img read more

first_imgIndianapolis, In. — The Indiana State Fair, which runs Friday, Aug. 3, through Sunday, Aug. 19, is offering the following deals to fairgoers:Ride Safe Indiana Day Sunday, Aug. 5The first 100 motorcycles that enter Gate 6 may park on Main Street.Chevrolet Military DayMonday, Aug. 6Military personnel and their family members get in free with military ID.$2 Tuesday Presented by the Secretary of StateTuesdays, Aug. 7 and 14Attendees pay a $2 admission fee, Midway rides are $2, and concessionaires have $2 food specials.Indiana Pork Day and Farmers’ DayWednesdays, Aug. 8 and 15Attendees receive free admission when they present the ticket printed in the Indianapolis Star, and those age 55 and older ride the shuttles for free.BMV Discount DayThursday, Aug. 9Attendees pay a $6 admission fee when they present a printed voucher from myBMV.com.Hoosier Lottery DaySaturday, Aug. 11While supplies last, those 18 and older receive a free lottery ticket.First Responders DayMonday, Aug. 13Statewide firefighters, police officers and EMT personnel, along with their families, receive free admission when they present an ID or badge at the gate.AAA DayThursday, Aug. 16AAA members receive free admission when they present their card.For more information on the State Fair deals, click here.last_img read more