Navigation Links
New energy technologies promise brighter future
Date:11/19/2012

TAMPA, Fla. (Nov. 19, 2012) In three studies published in the current issue of Technology and Innovation Proceedings of the National Academy of Inventors, innovators unveil creative technologies that could change our sources of energy, change our use of energy, and change our lives.

Untapped energy in the oceans

The kinetic energy in the Florida Current and in Florida's ocean waves can be captured and used, said Howard P. Hanson of the Southeast National Marine Renewable Energy Center at Florida Atlantic University.

"Capturing the kinetic energy of the Florida Current will require both materials advances and new designs for marine current turbines and their efficient deployment," said Hanson. "The hydrokinetic energy of tidal and open-currents, as well as ocean waves, and the thermal potential of the oceanic stratification, can be recovered using ocean thermal conversion technology."

Hanson calls this concept "marine renewable energy," or MRE, and noted in his article that the U.S. Department of Energy has formed three national MRE centers to investigate the resource potential in the oceans and to advance the technology for recovering MRE.

Nanoscale "rectennas" can convert waste thermal energy to electricity

"Converting waste heat to electrical energy can be a reality by using a rectenna, a combination of high frequency antenna and a tunnel diode," wrote three clean energy engineers from the University of South Florida's Clean Energy Resource Center.

According to article co-author Yogi Goswami, thermal radiation, or the infrared (IR) portion of the electromagnetic spectrum, is often an overlooked source of renewable energy and more than half of the power provided by the sun both directed and re-radiated lies in the infrared part of the spectrum.

"If the IR radiation potential of the earth could be harvested with 75 percent efficiency, it would generate more energy per unit area than a fixed orientation solar cell located in a prime solar location," said study co-author Subramanian Krishnan.

Rectenna components (antenna and rectifier) used to recapture wasted IR radiation is developed from the decades old concept of using the wave nature of light rather than its thermal effect. Recent advances in nanotechnology have made possible the harvesting of solar energy by rectenna more viable, they said. Recent research has shown that rectenna can be developed at IR frequencies with existing technology and used for IR energy conversion.

For co-author Elias Stefanokos, the approach of using a rectenna in combination with a plasmonic blackbody emitter would improve efficiency of all systems.

"This research will significantly increase the efficiency of photovoltaic cells, at little added cost, by integrating the plasmonic emitter with the cell," said Stefanokos.

Their paper presents the current state-of-the-art in the field of rectenna-based conversion with a focus on its critical components.

Nanotechnology solutions for greenhouse light

"Farmers are at the mercy of weather that can cause damage to their crops," wrote a team of physicists from the University of South Florida. "Consequently, greenhouse farming and urban agriculture are being looked at as a more efficient and cost effective way to grow produce."

Sarath Witanachchi, Marek Merlak and Prasanna Mahawela, of the USF Department of Physics, presented the specifics for a new nanophosphor-based electroluminesence lighting device that caters to the exact wavelengths of light required for photosynthesis in indoor, hydroponic agriculture. The new, nanotechnology-based grow light also has the potential to reduce energy costs significantly."

"Conventional technologies used in today's agriculture are inefficient and lead to natural resource waste and degrade the environment," said Witanachchi. "Urban agriculture will become the choice in the future. Nanophosphors required to fabricate the active layer of the electroluminescence device are grown by a microwave plasma process, which was developed at the University of South Florida. This process enables the growth of crystalline nanophosphors directly on a substrate as a uniform coating without further processing steps."


'/>"/>

Contact: Judy Lowry
jhlowry@usf.edu
813-974-3181
University of South Florida (USF Innovation)
Source:Eurekalert

Related biology news :

1. Story tips From the Department of Energys Oak Ridge National Laboratory, March 2012
2. First complete full genetic map of promising energy crop
3. Polycrystalline diamond drill bits open up options for geothermal energy
4. NOAA science supports New Yorks offshore energy planning
5. Energy requirements make Antarctic fur seal pups vulnerable to climate change
6. Carnegies Greg Asner named Energy/Climate Fellow by US State Department
7. A new dimension for solar energy
8. Is bioenergy expansion harmful to wildlife?
9. University of Minnesota invention helps advance reliability of alternative energy
10. Nanocrystal-coated fibers might reduce wasted energy
11. Europe meets to discuss progress in energy research and development
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/7/2017)... Brandwatch , the leading social intelligence company, today announces that it ... insights to support its reporting, help direct future campaigns, and share ... charity will be using Brandwatch Analytics social listening and analytics technology ... the topics and issues that are a priority for its supporters. ... "Until recently we,ve ...
(Date:3/2/2017)... , March 2, 2017 Who risk to ... Download the full report: https://www.reportbuyer.com/product/4313699/ ... FINGERPRINT SENSOR FIELD? Fingerprint sensors using capacitive technology ... fingerprint sensor vendor Idex forecasts an increase of 360% ... devices and of the fingerprint sensor market between 2014 ...
(Date:2/28/2017)... BARCELONA , Spanien, 27. Februar 2017 /PRNewswire/ ... durch Iris-Scan, wird seine erstklassige biometrische Lösung ... Snapdragon™ 835 mit X16 LTE auf dem ... 2. März) am Qualcomm-Stand in Halle 3, ... 835-Prozessor beinhaltet die Sicherheitsplattform Qualcomm Haven™ – ...
Breaking Biology News(10 mins):
(Date:3/22/2017)... 22, 2017   VWR (NASDAQ: ... product and service solutions to laboratory and ... acquired EPL Archives, Inc., an international biorepository ... entire regulated product research, development and commercialization ... and ancillary services. EPL Archives is widely ...
(Date:3/22/2017)... ... March 21, 2017 , ... Proper glycosylation is critical for ... increase and/or decrease in antibody-dependent cellular cytotoxicity or complement-dependent cytotoxicity, there is a ... , To meet this demand, the team at SCIEX has developed a ...
(Date:3/22/2017)... NY (PRWEB) , ... March 21, 2017 , ... The ... Summit (CMO Summit) to be held on May 10-11, 2017, at the Colonnade ... the country specifically for Chief Medical Officer peer-to-peer learning, benchmarking and support. , “The ...
(Date:3/22/2017)... ... March 22, 2017 , ... The Society for Immunotherapy of Cancer ... in the Administration’s recently published fiscal year 2018 budget request. , This ... (NIH) by $5.8 billion or roughly 20% of its total budget. If applied proportionally ...
Breaking Biology Technology: