Social Media Sidebar

Announcement

Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

People say we're running out of energy. That's only true if we stick with these old 19th century technologies. We are awash in energy from sunlight.

 

Ray Kurzweil

 

Three radical new energy technologies

RATE THIS! +0
Posted in Science on 21st Nov, 2012 07:12 PM by AlexMuller

Three innovative new energy technologies are explored in the current issue of Technology and Innovation — Proceedings of the National Academy of Inventors:

 

Capturing ocean energy

 

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,” he said. “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.

 

Nanotechnology solutions for greenhouse light

 

Sarath Witanachchi, Marek Merlak and Prasanna Mahawela, of the USF Department of Physics, present 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.”



Read original article » Back to category

Comments



 

Recent headlines

  • Posted in Science on 2017-10-21 02:03:22
    Japan Just Discovered the Perfect Spot to Build a Moonbase..read more
    Posted in Hardware on 2017-10-21 01:52:51
    Up to 200 pound pieces of China’s Space Station could.....read more
    Posted in Science on 2017-10-21 01:47:37
    The US government keeps spectacularly underestimating.....read more
    Posted in Software on 2017-10-20 00:53:07
    Google DeepMind: AI becomes more alien..read more
    Posted in Science on 2017-10-20 00:47:37
    Bigelow and ULA plan expandable B330 orbital lunar space.....read more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in about.....read more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for commercial.....read more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 Downloads..read more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into new.....read more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs,.....read more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for commercial.....read more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short Sighted..read more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, but.....read more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in about.....read more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target mitochondria..read more

Recent Blog Posts

  • Posted by AlexMuller
    Scientists probe Neptune's depths to reveal secrets of icy.....read more
    Posted by AlexMuller
    New terahertz imaging approach could speed up skin cancer.....read more
    Posted by AlexMuller
    Rebutting the claim that antidepressants do not work..read more
    Posted by AlexMuller
    Artificial neural networks decode brain activity during.....read more
    Posted by AlexMuller
    Four Earth-sized planets detected orbiting the nearest.....read more

Login to your Account

Login to your PlanetTech Account here

Username:
Password:
Remember me
or

Create a New Account

You just need username and password

The following errors occured:
Username:
Email:
Password:
Verify password:
Remember me