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Directory:Acoustic Generator:SCORE:Stove for Cooking, Refrigeration and Electricity

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Paul Riley/University of NottinghamTo use the SCORE stove, wood is placed inside the stove and burned. The fire heats compressed air, which begins to vibrate and produce sound waves. The sound waves vibrate a diaphragm located at the end of the pipe. The diaphragm is attached to a coil of metal wires that sit inside a magnet. As the wire coil vibrates it generates an electrical current, which is captured by wires and converted to the proper voltage. -- Discovery
Paul Riley/University of Nottingham
To use the SCORE stove, wood is placed inside the stove and burned. The fire heats compressed air, which begins to vibrate and produce sound waves. The sound waves vibrate a diaphragm located at the end of the pipe. The diaphragm is attached to a coil of metal wires that sit inside a magnet. As the wire coil vibrates it generates an electrical current, which is captured by wires and converted to the proper voltage. -- Discovery

Acoustic Stove, Fridge, Generator Could Aid Third World

The "Stove for Cooking, Refrigeration and Electricity," or SCORE, could help improve the health and quality of life for the two billion or so people in the world who cook over open fires. The SCORE thermoacoustics technology promoted by a multi-institutional project converts heated gas into sound waves which can be used to cook, cool, and/or generate electricity.


Contents

Official Website

Associated Links

Latest Developments

May 10 2007

Press Release:

The Problem

Traditional cooking over a fire is notoriously inefficient. A person can spend two hours a day collecting wood to burn in a fire that is so wasteful that 93 percent of the energy generated goes up in smoke. [1]


How it Works

Block diagram of Score showing linear alternator, Theromoacoustic engine and cooler.
Block diagram of Score showing linear alternator, Theromoacoustic engine and cooler.

Source: Discovery coverage:

Wood is placed inside the stove and burned. The fire heats compressed air that has been pumped into specially shaped pipes located inside the stove's chimney and behind the stove.

The heated air begins to vibrate and produce sound waves. Inside the pipes, the noise is 100 times louder than a jet taking off. But because the pipes are stiff and do no vibrate, the sound waves have nowhere to go. So outside the pipe, people hear only a faint hum.

The sound waves vibrate a diaphragm located at the end of the pipe. The diaphragm is attached to a coil of metal wires that sit inside a magnet. As the wire coil vibrates — about 50 times per second — it generates an electrical current, which is captured by wires and converted to the proper voltage.

The stove has electrical sockets, where the homeowner can plug in, for example, a mobile phone for charging. Or she can sell the electricity as a phone-charging service.

For refrigeration, the heated, compressed air is sent through a different part of the pipe, where sound waves cause the air to expand. As it expands, it cools to a temperature that can produce ice. It takes about two hours of stove use to produce enough ice that will keep the fridge cold for 24 hours. But homeowners have the option of producing more ice to sell for income.

Patents

list here

Profiles

University of Nottingham, United Kingdom

Paul Riley: Project Director

Paul Riley is the project director at the University of Nottingham in the United Kingdom

Riley and his team want to involve local universities to train a labor force that can build and manufacture most of the parts needed to make the stove. In five year's time, they hope to be churning out about 1 million stoves a year that each sell for $30 to $40. [2]


Coverage

In the News


  • Stove cooks, chills and powers your mobile - A stove that uses acoustic technology to cook and cool, and generates its own electricity, is being designed for developing communities in Africa and Asia. ... (ABC Science, Australia; May 29)
  • Acoustic Stove Could Aid Third World - An appliance being designed for developing communities in Africa and Asia not only generates electricity, but also cooks and cools using acoustic technology. (Discovery News; May 25, 2007)
  • SCORE: The Multi-tasking Stove, Sounds Good - Take a Stirling engine, some four UK universities, (Nottingham, Imperial College London, Manchester, Queen Mary London), a leading US research centre (Los Alamos National Laboratory), a multi-national electrical goods manufacturer (GP Acoustics), an international charitable organisation (Practical Action), sprinkle in £2 M (~4$4 M USD) and let simmer for 5 years and you just might conjure up a SCORE (Stove for Cooking, Refrigeration and Electricity). (TreeHugger; May 18, 2007)

Related Technologies

Contact

Name given in press release:
Abigail Smith
Imperial College London Press Office
Tel: 020 7594 6701
Email: abigail.smith@imperial.ac.uk

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