Electrochromic windows, so-called ‘smart windows’, share a well-known problem with rechargeable batteries – their limited lifespan. Researchers at Uppsala University have now worked out an entirely new way to rejuvenate smart windows which have started to show signs of age.
The study, published in the distinguished science journal Nature Materials, may open the way to other areas of application.
Smart windows make it possible to control how much visible light and solar energy enter a building. This energy often leads to too high indoor temperatures in commercial buildings the world over, even in Sweden, so there is a need for air conditioning. Smart windows can drastically reduce energy consumption for air conditioning, and they can also help create a more pleasant indoor environment by reducing the amount of dazzling light coming through them.
The electrochromic smart windows are controlled electrically. This kind of window is the result of research carried out at Uppsala University. Commercial production has recently been started by the company ChromoGenics AB.
The electrochromic smart window is made up of a series of thin layers on top of each other. The most important of these are two layers of tungsten oxide and nickel oxide, both about a third of a micrometer thick. They are separated by an electrolyte layer. The window’s opacity to visible light and solar energy varies when an electrical current flows between the oxide layers.
“The principle is the same as for an electric battery. Here the tungsten-oxide is the cathode and the nickel-oxide the anode. Opacity depends on how much the ‘battery’ is charged,” says Rui-Tao Wen, a doctoral student who carried out the study as part of his thesis.
The lifespan of both electric batteries and electrochromic smart windows is a well-known problem. They need to work after being charged and discharged many times if they are to be really profitable.
In the study, the researchers show that an electrochromic tungsten oxide layer which has been charged and discharged many times and has started to lose its capacity can be restored to its former high capacity. This is achieved by running a weak electric current through it while it is in light mode. This takes about an hour. In this way, the electric charge which has ‘fastened’ in the material is removed and the tungsten oxide layer is like new again.
“This is a new way to rejuvenate smart windows so that they last much longer. And the same principle might perhaps be used for electric batteries,” says Claes-Göran Granqvist, senior professor at the Ångström Laboratory, Uppsala University and one of the authors of the study.
Read more: Anti-ageing treatment for smart windows
The Latest on: News on: Smart windows
via Google News
The Latest on: News on: Smart windows
- Apple to Focus on Productivity With Next macOS, iOS Releases on April 17, 2019 at 10:14 am
"It's a smart idea," said Lauren Guenveur ... iPad applications will be able to function in multiple windows opened simultaneously, 9to5Mac reported. Each window can contain "sheets." At first, the ... […]
- Fiercest owl on the block; catbirds signal spring is coming on April 17, 2019 at 9:01 am
Cardinals’ big beaks work against them at feeders requiring pecking, but your cardinal has figured out how to extract some suet, showing what a smart bird he is and how ... This is a good time to make ... […]
- What is Windows 10 LTSC or Long-Term Servicing Channel? on April 17, 2019 at 6:47 am
Windows 10 Feature updates always offer more stability ... However as the trends are changing, Washing Machines are getting smart, and they will get updates, and this is where things change. LTSC can ... […]
- Ring's smart video doorbells and home security kits are on sale for up to $70 off at Best Buy and Amazon on April 16, 2019 at 2:39 pm
The products on sale include smart doorbells, smart security cameras for inside and outside, and even a home security kit, which comes with an alarm as well as sensors for your doors, windows, and ... […]
- Forza Street Launches on Windows 10, is Coming to Mobile on April 15, 2019 at 12:29 pm
There’s a new Forza experience available on Windows 10 called Forza Street ... like those in the Asphalt and Need for Speed series. Which is smart. “In Forza Street, new Forza fans and seasoned ... […]
- Smarten up your appliances with Amazon's Smart Plug down to just $15 on April 15, 2019 at 6:48 am
What sets Amazon's smart plug apart from the others is the simplicity of it. You literally take it out of the box, plug it in, and ask Alexa to turn it on. From here, you're set. It looks and works ... […]
- Living on the (New) Edge: What’s Missing on April 15, 2019 at 5:32 am
That syncing will one day extend to the new Edge on Windows 7, 8.1, and Mac ... Reading list, ebooks support, smart pen-compatible annotation capabilities, and more—will likely never be ported to the ... […]
- 5 ways to get Kim's eBooks about smart homes, making money, using Amazon Echo and more on April 13, 2019 at 11:10 am
That’s right; the Digital Goddess has several eBooks that tackle topics such as buying smart home devices, tips for Windows 10 users, and ways to make money from home. We'll show you how to get them ... […]
- Spy on your smart home with this open source research tool on April 13, 2019 at 3:19 am
spy on your smart home devices to see what they’re up to. The open source tool, called IoT Inspector, is available for download here. (Currently it’s Mac OS only, with a wait list for Windows ... […]
- Philips Hue's $130 light bars change color depending on what you're watching on your computer or TV — they're impressive for their accuracy on April 12, 2019 at 11:39 pm
Hue Sync is only available for Windows and macOS, and that's it ... As is the case with a lot of smart home products, Hue Play is almost there. It has a lot of impressive features that mostly work, ... […]
via Bing News