Featured Research

from universities, journals, and other organizations

Bio-inspired design may lead to more energy efficient windows

Date:
August 2, 2013
Source:
University of Toronto Faculty of Applied Science & Engineering
Summary:
Scientists are turning to nature to find a way to make windows more energy efficient. In a recent article, researchers describe a novel process to cut down on heat loss during the winter and keep buildings cool during the summer. Their "bio-inspired approach to thermal control for cooling (or heating) building window surfaces" calls for attaching optically clear, flexible elastomer sheets, bonded to regular glass window panes.

A. Schematic of the composite window structure. B. The artificial vascular network layer.
Credit: Image courtesy of University of Toronto Faculty of Applied Science & Engineering

University of Toronto Engineering professor Ben Hatton (MSE) is turning to nature to find a way to make windows more energy efficient.

Related Articles


In a recent article in Solar Energy Materials & Solar Cells, Hatton and colleagues at Harvard University describe a novel process to cut down on heat loss during the winter and keep buildings cool during the summer. Their "bio-inspired approach to thermal control for cooling (or heating) building window surfaces" calls for attaching optically clear, flexible elastomer sheets, bonded to regular glass window panes.

The elastomer sheets, made from polydimethylsiloxane (PDMS) have channels running through them through which room temperature water flows. The technique has resulted in 7 to 9 degrees of cooling in laboratory experiments and is effective both at small and large scales, Hatton and his colleagues said.

"Our results show that an artificial vascular network within a transparent layer, composed of channels on the micrometer to millimeter scale, and extending over the surface of a window, offers an additional and novel cooling mechanism for building windows and a new thermal control tool for building design," he said.

Hatton noted that windows account for about 40 per cent of building energy costs. To find a solution to the problem, he turned to nature. "In contrast to man-made thermal control systems, living organisms have evolved an entirely different and highly efficient mechanism to control temperature that is based on the design of internal vascular networks. For example, blood vessels dilate to increase blood flow close to the skin surface to increase convective heat transfer, whereas they constrict and limit flow when our skin is exposed to cold."

He said the technique could also be applied to solar panels, increasing their efficiency. He also noted that as the water flows through the panels, it gets hotter, and this hot water could be used to supply heated water to an existing hot water system or to a heat storage system.


Story Source:

The above story is based on materials provided by University of Toronto Faculty of Applied Science & Engineering. Note: Materials may be edited for content and length.


Journal Reference:

  1. Benjamin D. Hatton, Ian Wheeldon, Matthew J. Hancock, Mathias Kolle, Joanna Aizenberg, Donald E. Ingber. An artificial vasculature for adaptive thermal control of windows. Solar Energy Materials and Solar Cells, 2013; 117: 429 DOI: 10.1016/j.solmat.2013.06.027

Cite This Page:

University of Toronto Faculty of Applied Science & Engineering. "Bio-inspired design may lead to more energy efficient windows." ScienceDaily. ScienceDaily, 2 August 2013. <www.sciencedaily.com/releases/2013/08/130802132207.htm>.
University of Toronto Faculty of Applied Science & Engineering. (2013, August 2). Bio-inspired design may lead to more energy efficient windows. ScienceDaily. Retrieved March 3, 2015 from www.sciencedaily.com/releases/2013/08/130802132207.htm
University of Toronto Faculty of Applied Science & Engineering. "Bio-inspired design may lead to more energy efficient windows." ScienceDaily. www.sciencedaily.com/releases/2013/08/130802132207.htm (accessed March 3, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Tuesday, March 3, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Solar Plane Passes New Test Ahead of World Tour

Solar Plane Passes New Test Ahead of World Tour

AFP (Mar. 2, 2015) A solar-powered plane made a third successful test flight in the United Arab Emirates on Monday ahead of a planned round-the-world tour to promote alternative energy. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com
Electric Hydrofoiling Watercraft Delivers Eco-Friendly Thrills

Electric Hydrofoiling Watercraft Delivers Eco-Friendly Thrills

Reuters - Innovations Video Online (Mar. 2, 2015) The Quadrofoil is a high-tech electric personal watercraft that its makers call a &apos;sports car for the water&apos;. When it hits 10 km/h, the Slovenian-engineered Quadrofoil is lifted above the water onto four wing-like hydrofoils where it &apos;flies&apos; above the surface with minimal water resistance. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Smartphone Giants Unveil Latest Models at Technology Show

Smartphone Giants Unveil Latest Models at Technology Show

AFP (Mar. 2, 2015) Mobile providers have been unveiling their upcoming models at the Mobile World Congress in Barcelona, showing off the latest in smartphone technology. Duration: 00:57 Video provided by AFP
Powered by NewsLook.com
The Tech Challenges Facing Automakers

The Tech Challenges Facing Automakers

Reuters - Business Video Online (Mar. 2, 2015) This year&apos;s The International Motor Show is getting underway in Geneva. As Sonia Legg reports its taking place as Europe&apos;s beleaguered car industry finally starts showing signs of picking up. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins