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
- Everything You Need to Know About Windows – March 2020on April 1, 2020 at 10:01 am
Windows 10 devices configured with a proxy might have limited or no Internet connection ... Vertical tabs should make it easier for users who have many tabs open at the same time to find content ...
- Blame This Windows 10 Bug For Your Recent VPN Issueson April 1, 2020 at 7:00 am
If you’re having network connectivity problems on your Windows desktop or laptop—and you’ve ruled out user error or a crappy wireless connection—there’s a small chance that Microsoft might be to blame ...
- Kolude Keyboard Hands-on Review: Ultimate Dongle for Apple, Windows, and Androidon April 1, 2020 at 2:23 am
Apple achieves its minimalist cred through slashing through features...but can we get some useful features back? Kolude: Yes!
- How to save money on your electric billon March 31, 2020 at 7:21 pm
Popular smart thermostats like the Google Nest and Ecobee put the thermostat controls right ... Appliances aren’t the only things that can be upgraded, as there are high-efficiency models of almost ...
- Global Smart Bathroom Market Expected To Reach CAGR of 11.2% by 2025on March 31, 2020 at 11:56 am
In the product type segment, the market is segmented into smart toilets, touchless faucets, smart shower system, smart windows, and others, out of which, smart toilet segment is estimated to capture ...
- Cheap Routers: Massive discounts on Asus, Belkin, and Netgearon March 31, 2020 at 10:19 am
It supports both macOS and Windows and has backward compatibility with 802.11 b/g/n networks ... The Nighthawk AC2300, specifically, is a model built for large homes and is ideal for integration with ...
- How Smart Building Technology Is Shaping Federal Agencieson March 31, 2020 at 7:51 am
A smart building typically looks like a regular building, with bricks and glass windows, but at the heart of a smart building are sensors that drive building automation. Internet of Things sensors and ...
- Hackers Might Target Your Smart Thermostat or Printer Nexton March 31, 2020 at 2:58 am
The Internet of Things (IoT) is a burgeoning sector of technology, often associated with the smart home but also consisting of all sorts of business applications ... as the majority of such devices ...
- Microsoft’s Chromium Edge is getting Vertical Tabs, Smart Copy, and Password Monitoron March 30, 2020 at 9:30 am
Consumer features like Vertical Tabs, Smart Copy, and Password Monitor are coming soon. Microsoft also shared a few updates for existing or already announced features like Collections, InPrivate mode, ...
- How to play DVD movie on Windows 10 without Windows DVD playeron March 30, 2020 at 6:25 am
This multitalented player for Windows 10 has been developed by XBMC Foundation. You can watch stored videos, music and DVDs. Kodi even allows you access to Live TV and radio. The application is ...
via Bing News