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Generating small amounts of electricity by squeezing luffa sponges

Generating small amounts of electricity by squeezing luffa sponges

A team of mechanical engineers at Beihang University, Peking University and the University of Houston has found that it is possible to capture small amounts of electricity by repeatedly squeezing treated luffa sponges. In their study, reported in Proceedings of the National Academy of Sciences, the group treated sample luffa sponges and measured the electricity they generated when repeatedly squeezed.

Prior research has shown that applying force or stress to certain materials can result in an accumulation of a piezoelectric charge. Prior research has also shown that repeatedly applying and releasing the force or stress can result in the production of a flow of piezoelectricity.

Over the past several years, engineers have investigated the possibility of generating small amounts of piezoelectricity by taking advantage of footsteps, for example, or the movement of clothes as a person walks. Electricity generated and collected in such ways is seen as a possible way to charge personal devices. In this new effort, the research team looked into use of a new kind of material to generate piezoelectricity—luffa sponges.

Luffa sponges are porous shells that are left behind when the fruit of a luffa plant is left to dry. They have been prepared and sold as a commercial product, mainly as a tool for removing dead skin from the body while in the shower. In this new effort, the researchers looked at luffa as a possible tool for generating small amounts of electricity.

They first treated them with chemicals to remove hemicellulose and lignin, leaving behind a cellulose crystal shell. Then, they connected the results to an electrical circuit and began squeezing them over and over by hand. The research team found they were able to generate up to 8 nanoamps of electricity.

They acknowledge that the amount of electricity generated is so small that it likely would not be of much use, but they also suggest that artificially created luffa sponges could be created that would be more efficient. They could also be made a lot bigger to generate useable amounts of electricity.

 

 


 

 

Source  Tech Xplore

Tevva gets go-ahead for electric truck manufacturing in UK and mainland Europe

Tevva gets go-ahead for electric truck manufacturing in UK and mainland Europe

The company is today (11 January) celebrating the achievement of European Community Whole Vehicle Type Approval (ECWVTA) for its 7.5-tonne battery-electric truck. In doing so, regulators have deemed the model as compliant with relevant safety and environmental standards. This is a prerequisite to selling any new vehicle models within the European Union (EU).

Tevva states that this model has a range of up to 180 kilometres (110 miles) per charge and that it can charge to 90% of this maximum range within five hours using existing charging technologies. It is marketed as a solution for urban routes and last-mile deliveries for international routes. The model is manufactured at Tevva’s factory in Tilbury, Essex, with the brand eyeing new manufacturing locations elsewhere in Europe for the future.

The first Tevva 7.5T Electric Trucks were delivered to commercial customers in the second half of 2022. The first one off the assembly line was purchased by Kinaxia Logistics in September 2022, for use on a trial basis in the first instance.

With the confirmation of the ECWVTA, Tevva is anticipating sales of up to 1,000 electric trucks this year, predominantly to the UK market. Customers on the brand’s books include Travis Perkins, Expect Distribution and Royal Mail. Royal Mail is notably working towards a net-zero value chain by 2040, with plans to operate more than 5,500 electric vehicles (EVs) and increase charging infrastructure investment by spring this year.

Tevva’s founder and chief executive Asher Bennett has called the ECWVTA “the most important landmark [the company] has reached to date”. No other pure electric truck of this size has received the Approval yet.

 

 

The news will be welcome amid the ongoing uncertainty around EV battery manufacturing in the UK. Britishvolt this week wrote to existing investors confirming that it is in talks to sell a majority stake, in order to safeguard a sustainable financial future for the development of its Gigafactory in Blyth.

In the coming months, Tevva is set to deliver its first 7.5T hydrogen-electric trucks to customers, following the first public launch of the model at the Road Transport Expo in Warwickshire last summer. Combining a hydrogen fuel cell system with a battery-electric design extends the vehicle range; this model touts a range of up to 435km (270 miles). Tevva is then exploring heavier hydrogen trucks of 12 tonnes and 19 tonnes in the longer term.

Bennett said: “We are on a mission to make sustainable trucks accessible at scale and believe our technology will empower the transport sector and the governments of Europe to meet their net-zero goals. By embracing both hydrogen and electric fuel sources, we can rethink the energy mix in transport, reduce strain on our electricity grid and accelerate electric truck adoption.”

 

Trucks in the clean transition

The UK is set to end the sale of new diesel and petrol heavy goods vehicles (HGVs) weighing 3.5 tonnes to 26 tonnes from 2034. A later deadline of 2040 has been set for heavier models. These targets, set under the 2021 Transport Decarbonisation Plan, are in support of the UK’s legally binding 2050 net-zero climate goal.

EU lawmakers are currently being pushed by large fleet operators to set similar targets. More than 40 corporate members of the Climate Group’s EV100 coalition signed an open letter to EU lawmakers last month, asking for emissions targets for HGVs and a deadline on ending the sale of all new trucks which are not zero-emissions. Supporters of the letter included PepsiCo, Unilever and Henkel.

 

 


 

 

Source edie

Irizar’s ieTram EV to be installed along London bus route

Irizar’s ieTram EV to be installed along London bus route

The streets of the UK capital will soon be traversed by the bus of the future after Transport for London (TfL) announced the rollout of 20 new electric buses which are expected to be in place along the 358 route (Crystal Palace to Orpington) by 2023.

The vehicles – known as the ieTram – were purchased by Go Ahead, the city’s largest bus operator, from e-mobility manufacturer Irizar. As part of the deal, the Spanish company will also be installing the electric charging infrastructure.

 

 

The details of the new EV public transport technology

This technology uses an inverted pantograph system that connects to the roof of the bus. With this in place, the new vehicles will be capable of recharging in under ten minutes upon the completion of a route.

According to a release from Irizar: “The buses will be powered by state-of-the-art batteries… and will be charged between trips using two fast charging inverted pantograph systems to be installed at Crystal Palace and Orpington Bus Stations, allowing the buses to be charged in less than five minutes and enabling them to perform the required service effortlessly.”

Thus far, pantograph technology has only been installed on one other bus route in the city (the 132, from North Greenwich to Bexleyheath).

The speed at which it allows recharging is a marked improvement on what TfL’s fleet can typically do, as the vast majority of London’s 850 electric buses must charge overnight in a garage.

For Irizar, the 12-metre-long buses also mark the company’s first foray into right-hand-side driving.

London has been working hard to make its transportation networks more sustainable. As a part of its Bus Action Plan, this move marks the latest in TfL’s efforts to have a zero-emission bus fleet by 2034. There is a hope, too, that with additional funding, this target can be brought forward to 2030.

 


 

Source Sustainability

The bo e-scooter and docking station is a reinvention of a troubled e-thing

The bo e-scooter and docking station is a reinvention of a troubled e-thing

E-scooters are an interesting form of “e-thing,” our term for the devices that are popping up in our Cambrian explosion of micromobility options and devices. As one reader noted recently, “Long live the eThings! This is a wonderful period of exploration.” The Bo e-scooter is a very different beast than the shared e-scooters from Lime and Bird that people complain are begriming sidewalks around the world. Almost all of the problems with e-scooters start with rental e-scooters, where people may not know how to ride them properly and park them anywhere. Nobody who owns a Bo e-scooter is going to abandon it in the middle of the sidewalk—it costs $2,400.

The problems with regular e-scooters are legion: The wheels are small and hard. When I was riding one in Lisbon on their marble sidewalks, I thought my teeth would shake out. Since the rider is standing, the center of gravity is high and this makes them unstable. They are great fun and useful transportation, but it certainly seemed to me that they could be a lot better, and probably a lot safer.

 

 

The Bo appears to address many of these problems. According to Bo CEO Oscar Morgan, “We spent 3 years developing the Bo M for everyone who can see the potential of the e-scooter, but who finds today’s scooters too unsafe, impractical for daily use, or simply not well designed.” It has what they call Safesteer, described as “a one-of-a-kind dynamic steering stabilization feature to increase rider safety and enjoyment.” Unusually for an e-scooter, it doesn’t fold.

“Aware that to some it is controversial, we made a conscious decision to eliminate the fold, launching Bo M with an unbroken Monocurve chassis,” said Bo CTO Harry Wills. “Bo M is designed for commuters traveling home to work who value exceptional ride, safety, and reliability above all else. Creating this new category, between a traditional e-scooter and an e-bike, our research discovered that the majority of people seldom or never use the fold. It represented a point of weakness, so that directed us to this final design.”

The Bo has 10-inch pneumatic tires and a special shock-absorbing deck so that it is not teeth-rattling. It has a 31-mile range, a 500-watt motor, regenerative braking, and a top speed of 24 miles per hour, depending on regulation. And of course, there are anti-theft systems and GPS tracking.

One of the big benefits of e-scooters is they are light and fold up, so you can take them wherever you go. The Bo does not fold and it weighs 40 pounds, which makes it a different kind of e-thing. So the company has also designed a different kind of storage. It’s a docking station with a monolithic, vertically integrated solar PV panel that charges an internal 2-kilowatt-hour battery in the day and charges the Bo M at night.

Morgan commented in a statement: “An essential feature of the Bo team is that we are scooter users, as well as designers and engineers. When we compared car ownership to life with the Bo M, security and ease of charging stood out as areas of opportunity to build a great rider experience. Bo M is highly efficient, with energy consumption as low as 15Wh per mile. This opened up the potential for a compact, stand-alone charge and security solution which could deliver meaningful range.”

My first reaction was that this is silly. If you have an e-thing that only consumes 15-watt-hours per mile and “can consume less energy in a week of commuting than a single hot shower,” then why bother? I really don’t think it makes much sense to park a scooter out in the rain on an expensive docking station when it is in front of a house with a big garage where you could plug it into a small charger.

 

 

However, the docking station doesn’t need an electric outlet so it can be put anywhere. One can imagine many places where this might be useful, including commuter train stations and office buildings that now have vast concrete parking garages. Cities and employers would be better off just giving people these instead of building those lots.

Perhaps the more important feature is the security technology, which is impressive. A secure place to park is one of the three pillars of the e-revolution. The security system is based on its own three pillars: mechanical, e-secure, and service-secure:

Mechanical-secure: Inaccessible, high-tensile steel pins deploy through the Bo M, fixing it securely to the base plate of the Bo E.
E-secure: Tamper sensors trigger high decibel audio alarm, camera filming, and live playback along with 4G notification to your smartphone. This is all synced with Bo M’s onboard alarm, GPS tracking, and audio alarms.
Service Secure: Bo is building the specification for an insurance product that reflects the increased safety of the vehicle when secured with Bo E.
E-scooters are an interesting niche. It is clear we have to separate the issues that come with shared scooters compared to privately owned units. A Swiss study found that shared e-scooters do not replace cars, but trips taken by foot, bike, or public transport. It also found that privately owned scooters last much longer and have a much lower carbon footprint. The Bo E is a very different e-thing.

We have noted before that e-bikes and e-scooters are climate action, and welcome the Bo to the party.

 


 

Source Treehugger 

Eco-Friendly Bulkers Built in Sri Lanka Part of New Building Trend

Eco-Friendly Bulkers Built in Sri Lanka Part of New Building Trend

The Colombo Dockyard in Sri Lanka is preparing to commence construction on a new class of eco-friendly bulk carriers that include electric power for Norwegian shipowner Misje Eco Bulk AS. This order is the second time recently that a Norwegian shipowner has contracted for construction of innovative ship designs from shipyards in this part of the world.

The bulk carriers to be built in Sri Lanka are innovative as they will have lower emissions compared to conventional bulk carriers of the same size. Each vessel will measure approximately 293 feet in length and is powered by a 4-stroke diesel engine with an electric hybrid system supplying additional power through a battery system. They will have a load capacity of 5000 DWT, carrying cargoes including grain, timber, unit loads, and containers.

The concept and the basic design for these innovative bulk carriers was developed by Wartsila Ship Design Norway AS and the detailed design work will be carried out by Colombo Dockyard.

The contract for the construction of six eco bulk carriers, with an option for four additional vessels, was signed on March 14, 2020, and is scheduled to become effective in September 2020, subject to final board approval. The first vessel of the series is scheduled to be delivered in 18 months and the subsequent vessels will be delivered at four-month intervals.

Misje Eco Bulk AS is a fully owned subsidiary of Kåre Misje & Co., a family-owned Norwegian company that provides a complete package of services from chartering and operation to technical and financial management.

Colombo Dockyard, which is 35 percent owned by the Sri Lankan Government, has been targeting the European market, especially for the construction of eco-friendly bulkers, cable laying and repair vessels, service operation vessels, and alike, which it believes are in demand and align with the shipyard’s capabilities.

A month ago, India’s Cochin Shipyard also announced that it signed contracts for the construction of two autonomous electric ferries for ASKO Maritime AS, Norway with an option to build two additional vessels. These autonomous electrical vessels are part of a project funded by the Norwegian Government aimed at emission-free transport of goods across the Oslo fjord. The 220-foot vessels will be Full-Electric Transport Ferries, each powered by 1846 kWh capacity battery. After commissioning of autonomous equipment and field trials in Norway, it will operate as a fully autonomous ferry that can transport 16 fully loaded Standard EU trailers on each trip.

 


 

SOURCE:  THE MARITIME EXECUTIVE