Navigation Links
New knowledge about thermoelectric materials could give better energy efficiency
Date:10/7/2008

Thermoelectric materials can be assembled into units, which can transform the thermal difference to electrical energy or vice versa electrical current to cooling. An effective utilization requires however that the material supplies a high voltage and has good electrical, but low thermal conductivity.

- The new knowledge explains exactly why some thermoelectric materials can have the desired low thermal conductivity without degrading the electrical properties. This can be crucial for the conversion of wasted heat, for example, from vehicle exhaust emissions. Leading car manufacturers are now working to develop this possibility and the first models are close to production. The technology is expected to give the cars considerably improved fuel economy, explains Bo B. Iversen, Professor at iNANO at the University of rhus. The new knowledge can also contribute to the development of new cooling methods, so that one avoids the most common, but very environmentally damaging greenhouse gas (R-134a). All of which is a gain for the environment.

In the Nature Materials article the researchers have studied one of the most promising thermoelectric materials in the group of clathrates, which create crystals full of 'nano-cages'.

- By placing a heavy atom in each nano-cage, we can reduce the crystals' ability to conduct heat. Until now we thought that it was the heavy atoms random movements in the cages that were the cause of the poor thermal conductivity, but this has been shown to not be true, explains Asger B. Abrahamsen, senior scientist at Ris-DTU.

The researchers have used the technique of neutron scattering, which gives them opportunity to look into the material and see the atoms' movements.

- Our data shows that, it is rather the atoms' shared pattern of movement that determines the properties of these thermoelectric materials. A discovery that will be significant for the design of new materials that utilize energy even better, explains Kim Lefmann, associate professor at the Nano-Science Center, the Niels Bohr Institute at the University of Copenhagen.


'/>"/>

Contact: Kim Lefmann
lefmann@fys.ku.dk
452-125-0476
University of Copenhagen
Source:Eurekalert

Related biology technology :

1. Aureus Pharma Releases New Unified Knowledge Database
2. Knowledge Enterprises, Inc. and The Institute for Orthopaedics(TM) Release The 2007-2008 Orthopaedic Industry Annual Report
3. New Online Learning Tool Fills the Knowledge Gap on Botulinum Toxin Type B for Cervical Dystonia
4. Aureus Pharma Announces Renewal and Expansion of Licensing Agreement With Bristol-Myers Squibb for its AurSCOPE Knowledge Databases
5. Spanish Research Consortium Signs Four-Year Renewal Deal for ISI Web of Knowledge
6. Sigma-Aldrich and Ingenuity Systems Announce Partnership to Create E-Commerce Search Solution Based on Biological Knowledge
7. Swedish Neuroscience Institute and Institute for Systems Biology in Seattle Form Alliance to Learn More about Brain Diseases
8. Video: Moms Raise Red Flag About the Dangers of Widely Undiagnosed Bleeding Disorder
9. Shire Re-Launches ADHDSupport.com, a Virtual Road Map Providing Information, Tools and Practical Tips About Attention Deficit Hyperactivity Disorder (ADHD)
10. UCSF and YouTube Launch Channel Dedicated to Educating the Public About Neurodegenerative Diseases
11. CEO Addresses Fort Worth Business Leaders About Developing Pandemic and Business Continuity Plans
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/15/2017)... ... 15, 2017 , ... Nanomedical Diagnostics , a cutting-edge ... the launch of the new NHS Agile biosensor chip . The new ... a wide range of molecules, including small and large molecules, peptides, proteins, and ...
(Date:8/15/2017)... ... August 15, 2017 , ... Coffea arabica ... biotic and abiotic factors. During this educational webinar, participants will learn about the ... as gain a better understanding of how genomics is important for coffee breeding ...
(Date:8/11/2017)... ROCKVILLE, Md. , Aug. 11, 2017 ... in a New York Times article regarding ... 9.2 billion, according to Kalorama Information.  The ... an App for That"  used information ... Remote Patient Monitoring & Telemedicine Market  (Sleep, ...
(Date:8/10/2017)... Philadelphia, PA (PRWEB) , ... August 09, 2017 ... ... back to the classroom next week-- as students. From August 14th through the ... Institute. The institute, which debuted in the summer of 2016, provides Philadelphia-based middle ...
Breaking Biology Technology:
(Date:3/29/2017)... the health IT company that operates the largest health ... today announced a Series B investment from BlueCross BlueShield ... investment and acquisition accelerates higi,s strategy to create the ... activities through the collection and workflow integration of ambient ... secures data today on behalf of over 36 million ...
(Date:3/27/2017)... CENTRE, N.Y. , March 27, 2017 /PRNewswire-USNewswire/ ... Healthcare Information and Management Systems Society (HIMSS) Analytics ... Outpatient EMR Adoption Model sm . In addition, ... 12% of U.S. hospitals using an electronic medical ... CHS for its high level of EMR usage ...
(Date:3/24/2017)... , Mar 24, 2017 Research and ... Access System Market Analysis & Trends - Industry Forecast to 2025" ... ... to grow at a CAGR of around 15.1% over the next ... This industry report analyzes the market estimates and forecasts for all ...
Breaking Biology News(10 mins):