Navigation Links
Magnetic nanoparticles could aid heat dissipation
Date:11/20/2013

CAMBRIDGE, MA -- Cooling systems generally rely on water pumped through pipes to remove unwanted heat. Now, researchers at MIT and in Australia have found a way of enhancing heat transfer in such systems by using magnetic fields, a method that could prevent hotspots that can lead to system failures. The system could also be applied to cooling everything from electronic devices to advanced fusion reactors, they say.

The system, which relies on a slurry of tiny particles of magnetite, a form of iron oxide, is described in the International Journal of Heat and Mass Transfer, in a paper co-authored by MIT researchers Jacopo Buongiorno and Lin-Wen Hu, and four others.

Hu, associate director of MIT's Nuclear Reactor Laboratory, says the new results are the culmination of several years of research on nanofluids nanoparticles dissolved in water. The new work involved experiments where the magnetite nanofluid flowed through tubes and was manipulated by magnets placed on the outside of the tubes.

The magnets, Hu says, "attract the particles closer to the heated surface" of the tube, greatly enhancing the transfer of heat from the fluid, through the walls of the tube, and into the outside air. Without the magnets in place, the fluid behaves just like water, with no change in its cooling properties. But with the magnets, the heat transfer coefficient is higher, she says in the best case, about 300 percent better than with plain water. "We were very surprised" by the magnitude of the improvement, Hu says.

Conventional methods to increase heat transfer in cooling systems employ features such as fins and grooves on the surfaces of the pipes, increasing their surface area. That provides some improvement in heat transfer, Hu says, but not nearly as much as the magnetic particles. Also, fabrication of these features can be expensive.

The explanation for the improvement in the new system, Hu says, is that the magnetic field te
'/>"/>

Contact: Sarah McDonnell
s_mcd@mit.edu
617-253-8923
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Controlling magnetic clouds in graphene
2. Spirax Sarco Releases the EFT10 Electromagnetic Flow Transmitter for Measurement of Conductive Fluids
3. Magnetic Resonance Imaging (MRI) System Market worth $5.24 Billion By 2018
4. New technology in the magnetic cooling of chips
5. Researchers invent acoustic-assisted magnetic information storage
6. UCLA engineers develop new energy-efficient computer memory using magnetic materials
7. New UCLA Engineering research center to revolutionize nanoscale electromagnetic devices
8. Magnetic vortex reveals key to spintronic speed limit
9. New phenomenon in nanodisk magnetic vortices
10. Tablet computers may interfere with settings on magnetically programmable shunt valves
11. International Survey of T2* Cardiovascular Magnetic Resonance in Thalassemia
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/24/2014)... Boston, MA (PRWEB) December 23, 2014 ... presentation, Dr. James L. Sherley, director of the Adult ... attention on an often overlooked and under appreciated unique ... “Asymmetric Self-Renewal by Distributed Stem Cells: Misunderstood in the ... his message to congress participants. He gave the ...
(Date:12/24/2014)... 23, 2014 Nashville Fertility Center announced ... treasurer for the American Society for Reproductive Medicine (ASRM), ... research in reproductive medicine. In his new role ... the executive board and will have a voice in ... has actively supported ASRM since 1984 when he joined ...
(Date:12/24/2014)... -- PharmaBoardroom,s new report, , Healthcare ... for free download , digs deep into this vibrant ... the sector today. One area where ... developing a homegrown pharmaceutical manufacturing base, even if the government,s ... way off. A cursory comparison with neighboring Morocco ...
(Date:12/22/2014)... Dec. 22, 2014   Synthetic Biologics, ... of pathogen-specific therapies for serious infections and ... microbiome, today announced positive topline safety and ... trial of SYN-004, the Company,s investigational oral ... Clostridium difficile (C. difficile) infection, antibiotic-associated ...
Breaking Biology Technology:Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 2Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 3Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 4Nashville Fertility Center Announces Dr. George A. Hill Selected to Serve as ASRM Treasurer for 2014-15 2Nashville Fertility Center Announces Dr. George A. Hill Selected to Serve as ASRM Treasurer for 2014-15 3PharmaBoardroom Releases New Algeria Pharmaceuticals Report 2PharmaBoardroom Releases New Algeria Pharmaceuticals Report 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 2Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 4Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 5
... PharmaVentures announced today that it was delighted ... US and Canada as Merck & Co) to secure its ... Nottingham and Roslin BioCentre, for the former MSD research facility ... working between MSD, the Scottish Life Sciences community and the ...
... 17, 2012  Cepheid (Nasdaq: CPHD ) today ... the position of Senior Vice President, Human Resources, effective ... Cepheid from Verigy, Inc., a wholly owned subsidiary of ... Vice President of Human Resources.  Prior to Verigy, Mr. ...
... from a Nobel Laureate. Find out how major discoveries ... policy, education, and research in other countries. The iBioSeminars ... online, on-demand, and for free. iBioSeminars ... biology seminars given by the world,s leading researchers. The ...
Cached Biology Technology:PharmaVentures Helps Secure Investor for Former MSD Research Site 2Cepheid Welcomes Senior Vice President of Human Resources 2iBioSeminars and iBioMagazine: Free, Online Biology Seminars and Short Talks by Leading Scientists 2
(Date:12/11/2014)... , Dec. 10, 2014  Data Sciences International ... has released a new series of digital telemetry ... toxicology researchers. M series, part of the PhysioTel™ ... the best possible physiologic data when incorporating functional ... functional endpoints to toxicology studies has evolved from ...
(Date:12/10/2014)... 9, 2014  Valencell, a leader in performance biometric ... staggering demand from its licensees for highly accurate, clinically ... not solely coming from fitness and health sectors, but ... "A wearable is only as useful as the biometric ... ultimate driver in long-term mass consumer adoption of wearable ...
(Date:12/10/2014)... -- CIE San Diego has launched an innovative trust ... that enhances care coordination among social service and care ... earned a second $1 million grant from the Alliance ... in community and; will be recognized as a "Live ... 4-6p. CIE San Diego today announced the ...
Breaking Biology News(10 mins):New telemetry implants expected to change how large animal toxicology studies are conducted 2Wearable Technology Products Demand Highly Accurate Biometric Technology 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4
... acne live on everyone,s skin, yet one in five people ... a lifetime. In a boon for teenagers everywhere, a ... Louis and the Los Angeles Biomedical Research Institute has discovered ... "good" strains that may protect the skin. ...
... in German . , On the way ... Karlsruher Institut fr Technologie, or KIT for short, in cooperation ... realized another important milestone: the second process stage of the ... entrained flow gasifier bioliq II was handed over for operation. ...
... make up ScienceWorksForU.S. today again called on Congress to ... spending that will result in drastic reductions in funding ... U.S. economy of reduced R&D under sequestration are significant ... over the next nine years and 200,000 fewer jobs ...
Cached Biology News:New study could explain why some people get zits and others don't 2New study could explain why some people get zits and others don't 3Bioliq pilot plant: Successful operation of high-pressure entrained flow gasification 2Bioliq pilot plant: Successful operation of high-pressure entrained flow gasification 3Sequester will have a devastating impact on america's research enterprise 2Sequester will have a devastating impact on america's research enterprise 3
... Microarrays designed for genome-wide microRNA ... flexible and powerful Paraflo microfluidic on-chip ... as part of our comprehensive microRNA ... Content The Mammals microRNA Microarray ...
... The LIBS-ELITE houses Ocean Optics LIBS2000+ ... Research Universal Platform (UP) Ablation Chamber to ... position control. The systems features include a ... and targeting functions, precise X-Y sample positioning, ...
...
... The Varian 500-MS LC Ion ... for high-throughput LC/MS analysis where sensitivity, ... Varian 500-MS provides a robust platform ... sensitivity, mass resolution, and mass stability ...
Biology Products: