Browse Definitions :
Definition

ambient energy scavenging

Ambient energy scavenging, also called energy harvesting or power harvesting, is the process of obtaining usable energy from natural and human-made sources that surround us in the everyday environment. 

In most locations on earth, there is abundant ambient electromagnetic (EM) energy from cellular, television and radio transmitters, as well as satellite and other wireless communication systems. Other sources include physical motion, visible light, heat from the sun and the earth's interior, wind, ocean waves, ocean tidal currents, river currents and sound waves. 

Human activities inevitably produce waste energy that can go to productive use if harnessed and stored. For example, when you walk down the street, you move your arms and legs, generating kinetic energy to propel yourself, and also thermal energy as friction with your clothes, the surrounding air, and the pavement beneath your feet. An ambient energy scavenging device can convert most or all of this wasted energy into electrical energy that you can use (for example) to charge your cell phone battery.

The concept of ambient energy scavenging has existed for decades. In recent years, mounting interest in alternative energy has accelerated the pace of research. Here are a few examples of current research:

  • The U.S. Defense Advanced Research Projects Agency (DARPA) is developing an integrated energy scavenging and storage system for use with portable electronics, weaponry and vehicles, among other things. The integration of renewable energy with storage could enable batteries that would constantly remain charged. 
  • Technology from a company called Voltree harvests the metabolic energy of trees and converts it to electricity that power wireless sensor networks used to detect and control forest fires.
  • Piezoelectric (PE) generators, created with crystals that give off a charge under pressure, are being used or tested under roadways, walkways and in sports stadiums to obtain usable energy from traffic and activity above them. For example, an Israeli company called Innowattech placed PE generators beneath 33 feet of highway. The company estimates that such devices under a half-mile of a busy highway could generate enough electricity to power 250 homes.

 

Continue reading about ambient energy scavenging:

Faruk Yildiz outlines several ambient energy scavenging methods.

Engineers at Georgia Tech have developed a method of harvesting ambient electromagnetic energy.

See more about DARPA's  energy scavenging and storage system project.

Piezoelectric materials may provide an alternative for scavenging energy from physical vibrations such as sound waves.

This was last updated in March 2012

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

Dateiendungen und Dateiformate

Gesponsert von:

SearchCompliance

  • risk assessment

    Risk assessment is the identification of hazards that could negatively impact an organization's ability to conduct business.

  • PCI DSS (Payment Card Industry Data Security Standard)

    The Payment Card Industry Data Security Standard (PCI DSS) is a widely accepted set of policies and procedures intended to ...

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

SearchSecurity

SearchHealthIT

  • telemedicine (telehealth)

    Telemedicine is the remote delivery of healthcare services, such as health assessments or consultations, over the ...

  • Project Nightingale

    Project Nightingale is a controversial partnership between Google and Ascension, the second largest health system in the United ...

  • medical practice management (MPM) software

    Medical practice management (MPM) software is a collection of computerized services used by healthcare professionals and ...

SearchDisasterRecovery

SearchStorage

  • hot plugging

    Hot plugging is the addition of a component to a running computer system without significant interruption to the operation of the...

  • M.2 SSD

    An M.2 SSD is a solid-state drive (SSD) that conforms to a computer industry specification and is used in internally mounted ...

  • kilobyte (KB or Kbyte)

    A kilobyte (KB or Kbyte) is a unit of measurement for computer memory or data storage used by mathematics and computer science ...

Close