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
- Sonos Cyber Monday deal on Amazon: get up to 40% off home cinema products nowon December 1, 2019 at 8:48 am
Buy the Sonos Beam Compact Smart Soundbar with Amazon Alexa Voice Control in Black on Amazon ... The Epsom EF-100B creates a vibrant 150-inch display, even in normal daylight, there's no need to turn ...
- Why Netflix Isn't Working Today On Your Roku Player, Vizio TV Or Samsung TVon December 1, 2019 at 7:12 am
The reason older devices just got the boot is because they use Windows Media DRM, whereas Netflix made the switch to Microsoft's ... Vizio had previously indicated it would apply to smart TVs sold ...
- Top Ten Reasons Tesla’s Cybertruck Windows Shattered Despite Being ‘Unbreakable’on November 30, 2019 at 7:03 am
Here's some handy explanations for the shattered windows on the Cybertruck's "unbreakable" glass ... Well, even if via hindsight the shattered glass was a smart accidental move, this still doesn’t ...
- Apple's new 32GB iPad is actually cheaper than it was on Black Fridayon November 30, 2019 at 6:02 am
For starters, it's powered by one of the new A10 Fusion chips, which Apple says gives it "two times faster performance over the top-selling Windows PC for powerful multitasking and smooth gameplay." ...
- Reminder: Netflix Is Losing Support On Some Devices On December 1on November 29, 2019 at 4:04 pm
Last week there were a number of reports that Netflix would no longer work on some smart TVs from December 2. Turns out ... More specifically, a company spokesperson said that a “small percentage” of ...
- If you have one of these Roku devices or smart TVs, you’re losing access to Netflix on Sundayon November 29, 2019 at 11:39 am
The same goes for “select 2010 and 2011 Samsung Smart TV models that were sold in the U.S. and Canada,” but, once again, model numbers weren’t provided. The culprit behind this mass exodus of Netflix ...
- A $22 Amazon Echo Dot is a no-brainer for Windows and Xbox fans this Black Fridayon November 29, 2019 at 4:15 am
Cortana never really panned out as a smart assistant away from Windows 10, following on from the death of the Kinect on Xbox. And while that's a shame, if you're a Windows or an Xbox fan there's no ...
- Walmart Black Friday 2019 Sale: Deals on TVs, iPhones, Laptops and Moreon November 29, 2019 at 1:18 am
was $199.99 RCA Cambio 10.1" 2 in 1 32GB Tablet with Windows 10, 2GB RAM, Includes Keyboard - Charcoal - W101SA23T2C is now $99.99, was $149.99 Product ImageRCA Viking Pro 10.1" 2-in-1 Tablet with ...
- Reduce your carbon footprint with these 7 smart home deviceson November 25, 2019 at 6:11 am
Smart thermostats help you conserve the most energy of any smart device in your home ... They’re great for kids’ rooms and play areas where lights are often mistakenly left on. Sensors on windows and ...
- Apple could be working on next-generation media apps for Windowson November 21, 2019 at 6:45 am
the job listing suggests that these next-generation apps could perhaps be UWP clients available on both Xbox and Windows 10. In the key qualifications, Apple mentions experience with the UWP is a big ...
via Bing News