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Posts Tagged ‘turbine’

Photo: Mark Saludes.
Rodolfo Sagban stands inside a newly built micro-hydro facility in remote Nabuangan village, Philippines.

The Iran war has been a fiasco in almost any way I can imagine. Except for the increased focus on renewable energy, energy sources that don’t have to pass through the Strait of Hormuz, newly weaponized by Iran.

Mark Saludes writes at the Christian Science Monitor, “In a mountain village in the northern Philippines, electricity does not arrive through transmission lines or come from burning imported fossil fuel. It flows from a local river.

“Each night, as lights flicker on inside scattered homes, the power is generated by a small turbine turning steadily in the dark – built, maintained, and managed by the community itself.

“ ‘We don’t have to rely on outside power facilities. We decide when to switch it on and off,’ says Rodolfo Sagban, chairman of the Lapat Micro Hydro Power Association in Nabuangan village, located in Apayao province. ‘Most importantly, everyone in the village can access it, regardless of economic status.’

“The Iran war that began in late February has drawn attention to the Philippines’ fragile, import-dependent economy, as electricity costs, transport fares, and even food prices continue to climb. Roughly 3.6 million households across the Philippines live off the electrical grid – including about 1.2 million that rely on government-run, diesel-fueled power plants. These households have been hit especially hard by the global energy shock. 

“But in Nabuangan, these big-picture pressures barely register. Decentralized, renewable-based systems such as the one built here are shielding some communities from energy price spikes and grid instability – and they could offer a way to strengthen the country’s overall energy resilience.

“ ‘The real solutions are already here: community-led, small-scale energy systems that live in harmony with nature,’ says Joan Carling, a co-founder of Indigenous Peoples Rights International.

“Nabuangan’s first micro-hydro system – a simple, streamside structure – began operating in 2002. Water is diverted into a narrow intake and collected in a small reservoir. From there, it flows quietly through a long pipe that slopes downhill. Gravity creates enough water pressure to spin a small turbine inside a concrete enclosure. Power lines carry the electricity to homes across the village. 

“Over time, the system has expanded to two other villages in the area, Bubog and Sitio Simud. A fourth facility is under construction to provide electricity to Sitio Lapat, and is expected to be operational within a few months.

“Together, these water-powered energy stations form a small but stable network. 

“ ‘If other villages want a micro-hydro, we will teach them,’ says Mr. Sagban. ‘We will teach them how to manage it because management is what’s important.’

“Community members contribute labor to build and maintain the local systems. Decisions are made collectively. The forest that feeds the river is protected, because it is essential to the system’s survival. 

“Faith Joy Bonifacio, a resident of Sitio Lapat who has worked overseas as a contractor, runs a small internet hub powered by the village’s micro-hydro system and solar panels. The setup allows locals to charge personal devices, access all kinds of information, and stay connected without leaving the village.

“ ‘We don’t have a mobile signal here,’ she says. In the past, ‘we had to climb mountains just to send a message.’

“Reliable electricity also extends working hours, supports small businesses, and improves access to education. The changes have been gradual and they make a real difference. But they would not have been possible without a commitment from the community. 

“ ‘Unity among the people is very important,’ Mr. Sagban says. ‘Without it, these projects would not have been possible.’ …

“Says Gerry Arances, executive director of the Center for Energy, Ecology, and Development (CEED), ‘Every disruption in supply quickly ripples through the economy.’ … Mr. Arances says decentralization is one part of a practical response to the current uncertainty in global energy markets. 

“ ‘This does not mean dismantling the national grid, which remains essential for large industries and urban economies that require high-capacity power,’ he says. ‘But for much of the country, especially remote and underserved communities, decentralized and community-managed systems can serve as a strong complement.’ ” 

More at the Monitor, here.

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Photo: OceanBased Perpetual Energy
Using the constant flow of the Gulf Stream in the Atlantic Ocean to generate power holds promise for an energy future based on renewables.

People fighting global warming have been understandably concerned that coronavirus has soaked up all the oxygen (to coin a phrase) in the public forum. On social media, they try to remind us that health issues — and racial justice, too, for that matter — are inextricably tied to pollution, global warming, and climate justice. I heard one expert opine on the radio that our clearer skies would not last and that as polluting manufacturing slows down so does manufacturing related to renewable energy.

So I was happy to see from today’s story that inventors in the renewable arena are still inventing.

Craig Pittman writes at the Washington Post, “Nasser Alshemaimry was on a boat last month, heading for a spot in the Atlantic Ocean to test out his turbines. He was also, he said, heading for completion of his final life goal.

“ ‘This is my last hurrah,’ said Alshemaimry, 70. ‘I’m going to do this and then retire.’

“A year ago his company, OceanBased Perpetual Energy, agreed to work with Florida Atlantic University to develop a way to generate electricity by harnessing the steady-flowing Gulf Stream, the powerful ocean current that brings warm water from the Gulf of Mexico into the Atlantic and up the East Coast to Canada. Now his company was ready for the first test of five types of turbines to see which one would work best while anchored 80 feet below the ocean’s surface.

“A successful test, Alshemaimry said, would lead to a project that would cost an estimated $16 billion. The goal: in five years, producing 5 gigawatts of electricity from turbines spun by the Gulf Stream, which would be sent through underwater cables to a power distribution station built in the West Palm Beach area.

“The 12-person team submerged the turbines in the Gulf Stream current approximately 20 miles offshore between Broward and Palm Beach counties [and] left them there for 24 hours to see which ones would spin the best in the Gulf Stream’s flow, producing power with the fewest problems. …

“All of the turbines worked well, but the team selected a design that looks like a pair of airplane engines mounted on a single wing to eliminate the torque caused by the rotating propellers.

Ocean energy works very much like wind power — the force of the sea turns the propellers of a turbine, activating a generator to produce electricity.

“Small numbers of underwater energy devices are unlikely to harm marine life, change their habitats or affect the natural flow of ocean waters, according to [oceanographers] with the U.S. Department of Energy’s Pacific Northwest National Laboratory in conjunction with the International Energy Agency. But submerged turbines do come with unique challenges — electrical parts have to be sealed and must resist corrosion, while underwater repairs are disruptive and difficult.

“Producing energy from the ocean is not a new idea. The La Rance tidal power station in Brittany, France, has been using 24 turbines to convert ocean tides into electrical power since 1966. Ocean power produces none of the carbon emissions linked to climate change, and it appeals to some energy executives because tides and currents are predictable, unlike solar and wind. But the cost of building the complex infrastructure required is so great that, so far, solar and wind have outpaced it. …

“ ‘Many of these niche applications, while interesting and helpful for research purposes, can’t compete in the wholesale power market,’ said the [Energy Information Administration’s] Glenn McGrath. …

“Gabriel M. Alsenas, director of the Southeast National Marine Renewable Energy Center at Florida Atlantic, said that’s in part because ocean energy hasn’t been given the same government subsidies [as] solar and wind. …

“Alshemaimry, a Saudi entrepreneur with prior experience building solar-powered homes, spent several years working on a never-completed tidal energy project in Sweden. Then [he] met a U.S. Department of Energy official who suggested he contact Alsenas at Florida Atlantic University about the use of ocean currents. …

“After one phone conversation … Alsenas said, Alshemaimry dropped his Swedish project, switched from waves to currents and moved his entire operation. …

“ ‘Tidal is not 24/7 power,’ [Alshemaimry] said. ‘It’s back and forth. … The Gulf Stream flows 24/7/365.’ ” More here.

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