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Windcatcher the Huge Wooden Wind Generator

Windcatcher the Huge Wooden Wind Generator

Engineers have designed a new type of gigantic wooden wind generator dubbed the “Windcatcher” that could rise higher than the Eiffel Tower to tap into more powerful winds and generate huge amounts of renewable electricity far offshore.

At 1,066 feet (325 meters) from anchoring base to propeller tip, the proposed Windcatcher wooden wind generator system would surpass the iconic Parisian landmark’s height of 1,063 feet when fully built. But rather than offering tours of city views, this would allow the colossal tower to leverage faster wind speeds at higher altitudes than conventional wind turbines mounted closer to shore. Architects envision groups of these wooden wind generator megastructures with spinning wind turbines dotted along their central shafts, powering entire regions with clean energy.

Winds Tend to Blow Stronger Higher Up

Wind flow is enhanced the higher you go because ground obstacles like hills and buildings cause slowing friction. By elevating up into less disrupted airflow, the Windcatcher’s turbines could rotate 50% faster than ones constructed only 300 feet up. More spin velocity means manyfold more power generation. Modeling shows electricity output from a single Windcatcher could equal several traditional wind towers running in parallel. This boosted productivity per tower could make building fewer giants more efficient than patching seascape views with ever more waves of smaller mills.

Engineering a Gigantic Wooden Wind Generator

However, efficiently scaling turbines to Eiffel defining heights poses profound infrastructure challenges around stability, longevity, and safe maintenance access throughout the multiyear operation. The proposed Windcatcher design incorporates a sturdy yet flexible solid timber tower base tapering into an open skeletal wood frame swirling up to its peak generation capacity. The entire structure can gently sway to dampen extreme gust loads without catastrophic failure risk. Metal vibration dampeners also help absorb wind energy to limit motion.

Ringing the tower’s exterior, helical rampways, and grated platforms circle up to turbine machinery requiring routine inspection or emergency repairs. Cargo lifts and even tilting gondolas mean specialized crews can access any point from base to pinnacle in most conditions while remaining secure. But whatsoever precautions, embarking 1,000 feet into the North Sea gusts to bolt down wayward equipment is no task for the faint of heart.

The wooden wind generator concept has grabbed attention across renewable energy circles, yet experts debate feasibility obstacles around truly enormous timber joinery, massive construction logistics, operating equipment endurance, and connection infrastructure. Building numerous near Eiffel-topping wooden wind generators certainly nudges current offshore wind realism boundaries. However, proponents argue that visionary, clean power goals require expansive thinking, including wooden wind generators. However, intimidating initial steps appear. Our energy appetites will only expand, and every field bears longshot innovations that will later prove pivotal.

The proposal’s futuristic allure is clear. Windcatcher wooden wind generators evoke images of natural organisms gently swaying amid the waves, smoothly converting the wind’s energy into electricity, helping human life flourish onshore. Their sheer epic scale captivates the imagination much akin to Parisian Gustave Eiffel’s original wrought iron icon that long-held records as the world’s tallest manmade structure. Perhaps someday, rows of these block-long towers may claim their own position as ultimate wind energy titans built to sustainably power nations using renewable materials and ingenuity.

 

 


 

 

Source  Happy Eco News

Atmosphere to Water Generators: Veggies in the Desert

Atmosphere to Water Generators: Veggies in the Desert

The world is facing a water crisis. Atmosphere to Water Generators (AWGs) can help alleviate this problem in hot, dry locations.

As the population grows and climate change intensifies, water resources have become increasingly unpredictable and erratic. In arid environments, such as deserts, water is especially scarce. This is a major challenge for agriculture, as water is essential for growing food.

There has been growing interest in developing new technologies to produce water from air in recent years. The idea is not new; throughout history, ancient cultures have used dew fences and other passive means to harvest moisture from the air – even the very dry air of deserts. A quick look online shows several free or near-to-free ways to generate water, such as Kumulus water generators; solar-powered machines capable of producing 20 to 30 liters of healthy drinking water daily.

A new study published in Cell Reports Physical Science has demonstrated the potential of Atmosphere to Water Generators to produce water in arid environments using waste heat from solar panels. With SolarAtmosphere to Water Generators, it may be possible to grow food in the desert without relying on scarce freshwater resources. This could address the global water crisis and provide food security for a growing population.

 

How Atmosphere to Water Generators Work

Atmosphere to Water Generators work by using the heat from sunlight to evaporate water from the air. The water vapor is then condensed into liquid water. The process of evaporation requires energy, and the heat from sunlight provides this energy. The water vapor is then condensed into liquid water by cooling it down. This can be done by passing the water vapor through a cold pipe or by using a fan to blow cold air over it.

Atmosphere to Water Generators are typically made up of two main components: a solar collector and a condenser. The solar collector is used to collect the heat from sunlight. The condenser is used to condense the water vapor into liquid water.

 

Solar First then Water

In the system explained by the Cell Reports Physical Science study, the system was first designed to enable solar panels to work more efficiently; water production was just a happy byproduct.

Solar panels have been getting better and cheaper in recent years, but overall they still are relatively inefficient. This inefficiency is made worse by heat – a big problem for systems located in very hot deserts. Further, just like any other piece of electronics, a solar panel lasts longer when kept cool, which is also a problem in a harsh desert environment.

The solution was to coat the back of the panels with hydrogel, a product that absorbs water from the air at night, then releases it through evaporation as it heats during the day. As the water evaporates, it cools the solar panels making them work more efficiently and last longer.

This evaporated water is then captured and saved for crop irrigation. Deserts are places of extreme heat – daytime temperatures are hot, but nighttimes are very cool, making them the perfect place to maximize the performance of a system like this.

The study found that Solar Atmosphere to Water Generators can produce up to 1.5 liters of water per day per square meter of solar cell area. This is enough water to support the growth of vegetables in a desert environment.

The study’s findings can potentially revolutionize agriculture in arid environments, said the authors.

 

Challenges and Opportunities

There are a number of challenges that need to be addressed before Atmosphere to Water Generators can be widely adopted. One challenge is the cost. They are still relatively expensive, but the cost is expected to come down as the technology is developed further and the costs may be negligible when included in the design and commissioning of a large solar farm. More so when combined with the benefits of increased solar panel efficiency and lifespan.

Another challenge is efficiency. Solar Atmosphere to Water Generators are not yet as efficient as other methods of water production, such as desalination. However, due to the fact is essentially a passive system with very little maintenance and low cost, the efficiency of Solar Atmosphere to Water Generators is not as important as other types, and of course, the cost is expected to improve as the technology is developed further.

Despite these challenges, Solar Atmosphere to Water Generators have the potential to make a significant contribution to solving the global water crisis. With continued research and development, they could become a major water source for agriculture in arid environments.

 

 


 

 

Source  Happy Eco News

Ocean Battery stores renewable energy at the bottom of the sea

Ocean Battery stores renewable energy at the bottom of the sea

As useful as renewable energy sources are, they need to be backed up by storage systems that hold energy for times when the Sun isn’t shining or the wind isn’t blowing. Ocean Battery is a new design for an energy storage system that functions a bit like a hydroelectric dam at the bottom of the sea.

 

 

 

 

 

 

 

 

 

 

 

 

 

Developed by Dutch startup Ocean Grazer, the Ocean Battery is designed to be installed on the seafloor near offshore renewable energy generators, like wind turbines, floating solar farms, tidal and wave energy systems. It is made up of three components that together function on a principle similar to that of a hydro dam.

 

 

 

 

 

 

 

 

 

 

 

 

Buried in the seabed is a concrete reservoir that holds up to 20 million liters (5.3 million gal) of fresh water, stored at low pressure. A system of pumps and turbines connects this reservoir to a flexible bladder on the seafloor. Excess electricity from the renewable sources can be used to pump water from the reservoir into the bladder. When the energy is needed, the bladder releases and, driven by the pressure of the seawater above it, squeezes its water back down to the reservoir, spinning turbines on the way to generate electricity that’s fed out into the grid.

 

A diagram of the Ocean Battery system. When charged (left), the bladder is full of water and the concrete reservoir is empty. When the battery is discharged (right), the bladder is empty and the reservoir full.Ocean Grazer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The Ocean Grazer team says that the system has an efficiency of between 70 and 80 percent, and should be able to run an unlimited number of cycles over an operation lifetime of more than 20 years. It’s also fairly scalable – each concrete reservoir has a capacity of 10 MWh, so adding more of these can increase the overall capacity. Extra units of the pump and turbine machinery can also be added to boost the power output, if more energy is needed quickly.

 

 

 

The Ocean Battery concept is intriguing, but it’s far from the only ocean battery design in the works. Subhydro outlined a similar idea to pump seawater out of tanks placed at the bottom of the sea, then when electricity is needed the water is let it back in, spinning turbines as it fills the tank. MIT also described a similar concept using hollow concrete spheres. Another recent design worked off buoyancy, using electricity to drag and hold balloon-like containers underwater, then releasing them to generate electricity.

Still, there’s not going to be one solution that suits every situation, so solving a global problem like renewable energy storage is likely going to take a whole army of these different, creative ideas.

 


 

Source New Atlas