green techno – sustainable technologies

Retrofitting giant sails could cut ships’ carbon emissions quicker than switching to alternative fuels such as hydrogen
green techno – sustainable technologies

newcivilengineer.com 13-1-2022 Underwater turbines tipped to provide 10% of UK energy – By Catherine Kennedy

Undersea turbines could generate a tenth of Britain’s power in the future, according to a government-backed sustainable energy research company. Tidal stream energy uses turbines to extract energy from moving water in oceans and rivers, with UK waters holding around half of Europe’s tidal stream resource. Stephen Wyatt, director of of research and disruptive innovation at Offshore Renewable Energy Catapult (ORE) – which was established in 2013 by the government – said the 2020s could be a “golden decade” for the approach…”…


>green techno, re-use

theverge.com 14-1-2022 Clean energy tech needs to be designed for recycling, experts say – Too many adhesives impede disassembly today – By Maddie Stone

Companies like Apple and Samsung aren’t the only ones making high-tech devices that are hard to take apart and recycle. So are the manufacturers of critical clean energy technologies like solar panels, wind turbines, and electric vehicle (EV) batteries — and unlike the consumer tech industry, which is slowly starting to reverse some of its unsustainable design practices, there isn’t much being done about it. …

“Design for recycling hasn’t really come to that market yet,” says Andy Abbott, a professor of chemistry at the University of Leicester who recently co-authored a review paper on de-bondable adhesives and their potential use in clean energy. Instead, Abbott says, manufacturers tend to “overengineer” their products for safety and durability. Take EV batteries, which are composed of anywhere from dozens to thousands of individual, hermetically-sealed cells glued together inside modules and packs. While the heavy use of adhesives helps ensure the batteries don’t fall apart on the road, it can make them incredibly difficult to take apart in order to repurpose individual cells or recycle critical metals like lithium, cobalt, and nickel. “At the moment, because everything is bonded together, lots of batteries end up getting shredded,” study co-author Gavin Harper, an EV battery recycling expert at the University of Birmingham in the UK, tells The Verge. “The material is mixed together, which makes subsequent steps in the recycling process more complicated.”…


thetimes.co.uk 4-2021 Attaching giant sails to cargo ships could slash their greenhouse gas emissions – by Graeme Paton,

…”…Fitting giant sails to cargo ships could reduce their greenhouse gas emissions by at least 30 per cent, research shows. Reducing speeds to use less fuel when the engines are running would cut emissions by a further 10 per cent, according to the Institution of Mechanical Engineers. The government should part-fund a demonstration ship using retrofitted sails as part of the UN Cop26 climate change conference in Glasgow in November to improve understanding of the potential of wind power, the institution said. The government announced this week that emissions from international shipping would be included in the UK’s climate change targets. However, the institution’s report said rapid action was needed to clean up shipping because of slow progress on the issue…”…