The World's #1 Renewable Energy Network for News, Information, and Companies.

Is the Hornet Our Key to Renewable Energy?

As every middle-school child knows, in the process of photosynthesis, plants take the sun's energy and convert it to electrical energy. Now a Tel Aviv University team has demonstrated how a member of the animal kingdom, the Oriental hornet, takes the sun's energy and converts it into electric power -- in the brown and yellow parts of its body -- as well.

"The interesting thing here is that a living biological creature does a thing like that," says physicist Prof. David Bergman of Tel Aviv University's School of Physics and Astronomy, who was part of the team that made discovery. "The hornet may have discovered things we do not yet know." In partnership with the late Prof. Jacob Ishay of the university's Sackler Faculty of Medicine, Prof. Bergman and his doctoral candidate Marian Plotkin engaged in a truly interdisciplinary research project to explain the biological processes that turn a hornet's abdomen into solar cells.

The research team made the discovery several years ago, and recently tried to mimic it. The results show that the hornet's body shell, or exoskeleton, is able to harvest solar energy. They were recently published in the German journal Naturwissenschaften.

Discovering a New System for Renewable Energy? 

Previously, entomologists noted that Oriental wasps, unlike other wasps and bees, are active in the afternoon rather than the morning when the sun is just rising. They also noticed that the hornet digs more intensely as the sun's intensity increases.

Taking this information to the lab, the Tel Aviv University team studied weather conditions like temperature, humidity and solar radiation to determine if and how these factors also affected the hornet's behavior, but found that UVB radiation alone dictated the change.

In the course of their research, the Tel Aviv University team also found that the yellow and brown stripes on the hornet abdomen enable a photo-voltaic effect: the brown and yellow stripes on the hornet abdomen can absorb solar radiation, and the yellow pigment transforms that into electric power.

The team determined that the brown shell of the hornet was made from grooves that split light into diverging beams. The yellow stripe on the abdomen is made from pinhole depressions, and contains a pigment called xanthopterin. Together, the light diverging grooves, pinhole depressions and xanthopterin change light into electrical energy. The shell traps the light and the pigment does the conversion.

A Biological Heat Pump

The researchers also found a number of energy processes unique to the insect. Like air conditioners and refrigerators, the hornet has a well-developed heat pump system in its body which keeps it cooler than the outside temperature while it forages in the sun. This is something that's not easy to do, says Prof. Bergman.

To see if the solar collecting prowess of the hornet could be duplicated, the team imitated the structure of the hornet's body but had poor results in achieving the same high efficiency rates of energy collection. In the future, they plan to refine the model to see if this "bio-mimicry" can give clues to novel renewable energy solutions.

The research team also discovered that hornets use finely honed acoustic signals to guide them so they can build their combs with extraordinary precision in total darkness. Bees can at least see what they are doing, explains Prof. Bergman, but hornets cannot -- it's totally dark inside a hornet nest.

 

RELATED ARTICLES

First Anniversary of The Balkan Floods Highlights Renewable Energy Market Opportunities

Ilias Tsagas, Contributor One year ago this month, severe flooding in Serbia, Bosnia-Herzegovina and Croatia killed 79 people, displaced about half a million and caused economic paralysis of the region. In the wake of these the catastrophic events, ...
Canadian Climate Goals

Canada Announces Weak Climate Target

Danielle Droitsch, NRDC Last week, Canada has announced its contribution to the global effort to reduce greenhouse gases by announcing its post-2020 target. The target announced today is off-track to the 80 percent cut by 2050 they committed to in...
Renewable Energy Stocks

What Drives Alternative Energy Stocks?

Harris Roen, The Roen Financial Report Alternative energy became a serious market player after the turn of the millennium. Since that time, solar, wind, smart grid and other alternative energy stocks have experienced both strong up and down trends. The forces at...
Rooftop Solar Panels

Hypocrisy? While Buffett Champions Renewables, His Company Fights Rooftop Solar

Mark Chediak, Noah Buhayar and Margaret Newkirk, Bloomberg Warren Buffett highlights how his Berkshire Hathaway Inc. utilities make massive investments in renewable energy. Meanwhile, in Nevada, the company is fighting a plan that would encourage more residents to use green power.

CURRENT MAGAZINE ISSUE

03/01/2015
Volume 18, Issue 3
file

STAY CONNECTED

To register for our free
e-Newsletters, subscribe today:

SOCIAL ACTIVITY

Tweet the Editors! @megcichon @jennrunyon

FEATURED PARTNERS



EVENTS

EU PVSEC 2015 (European PV Solar Energy Conference and Exhibition)

The EU PVSEC is the largest international Conference for Photovoltaic re...

Sponsor/Exhibitor: MIREC Week 2015

Solectria, Pillar, and Variadores together are co-Silver Sponsors! Come ...

More Power, More Profit Tour - San Diego

Register for the SMA More Power, More Profit Tour for free, in-person sa...

COMPANY BLOGS

EU PVSEC 2014 extends its Scope

Added focus on application and policy topicsAbstracts for conference con...

EU PVSEC 2014: Call for Papers Receives Great Response

More than 1,500 contributions apply for presentation in AmsterdamScienti...

Boulder County Residents Generate Their Own Energy with Community S...

Despite a soggy afternoon, solar energy advocates gathered at ...

NEWSLETTERS

Renewable Energy: Subscribe Now

Solar Energy: Subscribe Now

Wind Energy: Subscribe Now

Geothermal Energy: Subscribe Now

Bioenergy: Subscribe Now  

 

FEATURED PARTNERS