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
- Volkswagen's new smart air conditioning system reacts to someone saying 'I'm cold'on January 19, 2020 at 10:24 am
This week Volkswagen revealed that its new Air Care Climatronic air conditioning system and its Smart Climate menu, which can together respond to vocal statements like "I'm cold" or "warm hands," are ...
- Las Vegas does 5G its own way, looking to win big as a smart cityon January 18, 2020 at 5:07 am
The big glass windows are adorned with the logos of companies helping Vegas with its vision: AT&T, which deployed the smart lights; Dell, which handles edge computing; NTT Data, a Japanese tech ...
- The humble Farmer: Without Facebook, who’d know how smart I can be?on January 18, 2020 at 3:06 am
“Computer guru friend Mark souped up my wife Marsha’s Acer laptop with Windows 10 so I could use that. “But, alas. I found I couldn’t work comfortably without my old XP computer and it is now once ...
- Trending: 2020 windows and doorson January 17, 2020 at 3:38 pm
By manufacturing windows and doors from sustainable materials such as composites and new hybrid materials, manufacturers can ensure that their products are beneficial to both the environment and their ...
- Amazon's most insane deals of 2020 so far are here — shop now before they sell outon January 17, 2020 at 1:59 pm
Shop it: TCL 65-inch Class 5-Series 4K UHD Dolby Vision HDR Roku Smart TV (65S525), $516 (was $1,200), amazon.com LG Alexa Built-in ... The MacBook Air is the go-to entry-level laptop, if you’re ...
- ‘Mechanical breathing’ in smart windowson January 17, 2020 at 1:13 pm
WEST LAFAYETTE, Ind. — Smart windows automatically change transparency when a voltage is applied. However, one reason they aren't more widespread is that the polymer inside dramatically expands and ...
- NSA discloses critical Windows 10 security bug instead of using it to spy on uson January 15, 2020 at 11:05 am
Microsoft has already patched the flaw, and you should install the latest Windows 10 update as soon as you get it. Don't Miss: Today’s top deals: 55″ 4K Roku TV for $468, $5 smart plugs, $25 Fire TV ...
- Like a bad ’90s revival, Compaq is back and making smart TVson January 14, 2020 at 11:31 am
In the mid-1990s, Compaq had set what was then the gold standard of computing, pushing out portable Windows 95 notebooks like the Compaq Armada 4160T and multimedia ... for the brand has us nostalgic ...
- Digital Trends Live: End of Windows 7, Super Nintendo World, Mars Rover nameson January 14, 2020 at 10:38 am
On this episode of Digital Trends Live, hosts Greg Nibler and Caleb Denison break down the biggest-trending topics of the day, including the end of Windows 7 support, Apple’s latest refusal to ... as ...
- Windows 7 support ends today – here’s how to upgrade to Windows 10 for freeon January 14, 2020 at 9:03 am
That goal is undoubtedly within reach now, however, because Tuesday, January 14th marks the last day of official Windows 7 support. Don't Miss: Today’s best deals: $5 Alexa smart plugs, $25 Fire TV ...
via Bing News