Archive | Solar power

World’s largest solar-wind hybrid installation

solar-wind

A Jamaica law firm has installed an 80 kw hybrid solar-wind array on the roof of their office. It is expected to save $2 million over its 25 year lifespan and uses small vertical turbines and solar PV.

The installation incorporates 50 of WindStream’s SolarMill devices. The different SolarMill models each comprise one or more solar panels and three or more turbines

Posted in News, Renewable energy, Solar power, Wind turbines0 Comments

Solar freakin’ roadways would be hugely expensive and won’t work

even-cooler

There are so many things wrong with solar freakin’ roadways; like cost, practicality, and durability, it’s difficult to know where to start. Here’s are some of the major points. Watch the video for more.

Price is a huge issue. Glass panels themselves are expensive. On top of that must be added the price of embedded processors and electronics in the panel, the ginormous cost of connecting the panels to the grid along the roadways, the steep cost of burying power and data lines, and of course, actually building the roads. New electrical infrastructure would need to be build alongside solar panel roads so the power could be sent elsewhere. This inevitably means new, big transmission lines everywhere.

Solar roadways must provide traction, just like regular roads. Will wet or icy glass road panels provide proper traction for braking and turning? Want to bet your life on that during an ice storm when the semi in front of you starts fish-tailing? The raised parts of the glass panels will wear down after prolonged usage, making the surface slippery indeed. Dirt and gravel is stronger and more abrasive than glass and will accelerate the process. Glass will become opaque, cutting down on efficiency of power creation.

Solar roadways cannot melt snow off them in winter during storms because the roads will be covered with snow and thus no power would be created. Plus, melting ice takes large amounts of energy. Snow plows are much more efficient. But would snow plows even be able to be used on solar roadways without damaging the glass due to scraping? I doubt it.

Tiles will inevitably come loose. Water will seep into the road, causing erosion. Asphalt doesn’t have this problem, and is 99% recycled now.

Driving a little bitty tractor on the glass panels as a demo is not sufficient. Try it with hundreds of loaded semis each day for several months, then see what the road looks like.

The Indegogo video shows the inventors shoveling waste colored glass into a wheelbarrow as an example of recycling. However, colored glass is not what is needed for solar panels. The glass needs to be clear. Further, they clearly do not have the facilities needed to turn waste glass into roadway tiles at any kind of scale.

Colored LEDs will be almost impossible to see during bright sunlight. Light pollution at night from thousands of roads with sparkly lights will be severe. Would you want to live on a street that had ever-changing lights all night long? Didn’t think so. And why do roads need lights on them anyway?

Parking lots with solar panels as the pavement seem to be a swell idea until your realize that cars will be parked on top of the panels during the day, thus cutting way down of power generation.

Solar roadways are a wonderful idea. However, they are completely impractical.

Posted in News, Renewable energy, Solar power

Floating solar power on wastewater treatment plant has big advantages

floating-solar-power

A wastewater treatment plant in Australia will use floating solar photovoltaic panels to decrease evaporation and to increase energy. The water cools the panels, allowing them to last longer and work at greater efficiency. The panels will cover 90% of the water surface, cutting down on evaporation. Wow. A double win. Let’s hope this technology spreads to water treatment panels everywhere and maybe even to reservoirs.

The solar panels are supported by buoyant polyethelene pipe and steel pontoons and construction is not all that different from rooftop solar.

 

Posted in Renewable energy, Solar power

Solar panels in space could beam power back to earth via microwave

llustration: John MacNeill

llustration: John MacNeill

The Japan Aerospace Exploration Agency proposes installing ginormous solar panels in space then beaming the power down to us by microwave. If this proves to be feasible, then energy shortages could disappear.

JAXA’s technology road map calls for work to begin on a 100-kW SPS demonstration around 2020. Engineers would verify all the basic technologies required for a commercial space-based solar power system during this stage. Constructing and orbiting a 2-megawatt and then a 200-MW plant, the next likely steps, would require an international consortium, like the ones that fund the world’s giant particle physics experiments. Under such a scenario, a global organization could begin the construction of a 1-GW commercial SPS in the 2030s. It would be difficult and expensive, but the payoff would be immense, and not just in economic terms. Throughout human history, the introduction of each new energy source—beginning with firewood, and moving on through coal, oil, gas, and nuclear power—has caused a revolution in our way of living.

Posted in Renewable energy, Solar power

Solar Wind Energy Tower may be built near Mexico border. I’m skeptical

solar-wind

The Solar Wind Energy Tower, promoters say, can produce power 24/7 in hot dry areas using recycled water. Pumps spray water at the top of a ginormous 1,200 foot diameter, 2,250 ft tall tower. Hot, dry air evaporates the water. The air inside the tower becomes cooler and heavier than outside air, creating wind speeds up to 50 mph, which then powers multiple turbines. San Luis, Arizona has just approved construction of a $1.5 billion structure.

Can this be built? Will the company find financing and pass regulatory and NIMBY hurdles? We shall see. Those commenting in an article by The Atlantic are openly skeptical, especially since the technology has not been proven at scale. And, um, what happens when birds get sucked into the turbines?

So, in this tower the moist air is heavier than the dry air? When did they learn to do that? Moist air used to be less dense where the airplanes fly.

I find it hard to believe people are falling for this.

“When water vapor content increases in the moist air the amount of Oxygen and Nitrogen decreases per unit volume and the density decreases because the mass is decreasing.”

The farce is strong with this one

From the company:

Solar Wind Energy’s Tower is unique in that it does not have any operational limitations in terms of time. It’s capable of operating around the clock, 24 hours per day, and seven days per week. Whereas there are operational limitations with solar collectors that work only when the sun shines, and with wind turbines that work only when the wind blows.

It also has the ability to be operated with virtually no carbon footprint, fuel consumption, or waste production. It generates clean, cost effective and efficient electrical power without damaging effects.

Posted in Renewable energy, Solar power, Wind turbines

Smart house by UC Davis / Honda

smart-home

Treehugger has detailed specs, photos, and videos of this innovative smart house. It has passive solar, complex heat pumps, LED lighting, solar power, software that controls power coming in from and out to the grid, and an electric car.

This is where the idea of the smart house makes sense for the average homeowner and builder. Who cares if your fridge is talking to your washing machine; what matters is that your house is talking to your car and working together with it to make them both net zero energy and net zero carbon, dealing with our two biggest sources of CO2, the house and the car.

honda-smart

Posted in Renewable energy, Solar power

Solar bridge in London now operational, Blackfriar’s Bridge

Blackfrairs-Bridge

Blackfriar’s Bridge in London, part of a railway station, now has 4,400 solar PV panels and generates 50% of power needed for the station. It is the largest solar bridge in the world. Construction was a bit tricky, as the panels were installed atop an aging Victorian era bridge while trains ran underneath. Solar PV, clearly, can work anywhere, not just in baking deserts.

During the renovations, the railway station was also fitted with other energy saving measures such as a rain harvesting system and sun pipes that will provide natural lighting throughout the building.

Posted in Renewable energy, Solar power

Ivanpah solar thermal plant blinding pilots, scorching birds

Credit: ivanpahsolar.com/

Credit: ivanpahsolar.com/

The recently opened, ginormous Ivanpah solar thermal plant in California near Primm NV is a hazard, says airplane pilots. Ivanpah uses huge mirrors to reflect heat from the sun to a central tower to power turbines. The glare is so pronounced that pilots say it was hugely distracting, even blinding.

“Daily, during the late morning and early afternoon hours we get complaints from pilots of aircraft flying from the northeast to the southwest about the brightness of this solar farm,” reported an air traffic controller at a FAA center that monitors the airspace in southern California. A pilot of a commercial jetliner told him the light reflected from the Ivanpah mirrors “was nearly blinding.”

In addition, birds have been killed by having their feathers burned off.

Of 34 birds reported dead or injured at Ivanpah in September, 15 had melted feathers. Dozens of other bird carcasses, not singed but with critical injuries, have been found in recent months at two solar projects about to go online on public land between Joshua Tree National Park and Blythe, Calif.,

Regulatory authorities have been curiously slow in reporting this, much less taking action.

Posted in Renewable energy, Solar power

Ivanpah, world’s largest solar thermal plant, offically dedicated today

Credit: ivanpahsolar.com/

Credit: ivanpahsolar.com/

The 392-MW Ivanpah solar thermal plant in California near Primm, Nevada officially goes online today, with a dedication ceremony.

Celebrities include execs from the project’s creators NRG Energy, Bechtel, and Brightsource, and financial backers Google and the Department of Energy’s Loan Projects Office which provided a $1.6 billion loan guarantee. Energy Secretary Ernie Moniz is flying in to do the ceremonial honors. Grammy-nominated rock band The Fray, which used Ivanpah as the backdrop for their “Helios” album cover and a music video, reportedly will be performing.

Crescent Dunes in Nevada, another solar thermal plant, starts commissioning this week with a series of start-up procedures, testing the system slowly before coming online with full power. It stores excess heat in molten salt so energy can be produced at night too.

Posted in Renewable energy, Solar power

Development of grid-scale solar power plants has almost stopped

Ivanpah. One of the few new grid-scaler solar plants, in CA near Primm NV. Credit: ivanpahsolar.com

Ivanpah. One of the few new grid-scaler solar plants, in CA near Primm NV. Credit: ivanpahsolar.com/

A lack of federal tax credits, tight financing, and utilities not needing more solar to reach 2020 California goal has greatly slowed development of big solar. California has mandated 33% in-state renewable energy by 2020 and utilities say they will attain that so they don’t need to make additional purchase agreements for expensive renewable energy. This will accelerate the shift to distributed (rooftop) solar continues.

Of the 365 federal solar applications since 2009, just 20 plants are on track to be built. Only three large-scale solar facilities have gone online, two in California and one in Nevada. The first auction of public land for solar developers, an event once highly anticipated by federal planners, failed to draw a single bid last fall.

Posted in Renewable energy, Solar power

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