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Directory:Acoustic Generator:SCORE:Stove for Cooking, Refrigeration and Electricity
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.
- Score Thermo-Acoustic Technology (LANL)
- Nottingham University Electrical
- The University of Manchester, School of MACE
- Imperial Mech. Eng.
- Practical Action, energy
May 10 2007
- 'Super-fridge' to help improve lives in developing countries - An all-in-one cooker, energy generator and fridge could soon be improving quality of life in developing countries, thanks to an international project launched this week. (Imiperial College)
- Powered by sound — revolutionary stove could help reduce poverty (Score)
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. 
How it Works
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.
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. 
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)
- The SCORE: All in One Low Tech Cooker, Energy Generator And Fridge - More efficient than Fire 1.0, the SCORE uses thermoacoustics to generate energy: Heat travels through a "stack" of parallel channels and acoustic standing ... (Wired News; May 21, 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)
- An oven-fridge-generator powered by sound - Several UK universities are teaming to develop an inexpensive all-in-one appliance for developing countries. (ZDNet; May 16th, 2007)
- SCORE-Stove for Cooking,Refrigeration and Electricity (Timbuktu Chronicles; May 15, 2007)
- Ben & Jerry's Uses Sound to Chill Ice Cream (listen to sound) - Scientists have found a new way to refrigerate ice cream, by using sound waves instead of chemicals. (NPR; April 28, 2004)
See Discussion page