Thermoacoustic Refrigerator



In 1987 an international group of scientists and Government Officials established the Montreal protocol, an agreement to control the use and release of CFC and to schedule a time frame for eliminating their production. This agreement is a historic step in the on going process of building consensus regarding environmental impact of CFC. Both the Montreal protocol and provisions for 1990 clean Air Act specify schedules for phasing out CFC production by year 2000.
This forced a new wave of research and development in refrigeration technologies. Existing technologies are being adapted to new chemicals, processes are being refined to become more energy efficient, and innovative approaches to refrigeration are being tested.
A new technology under development is cooling by sound or Thermoacoustic refrigeration. We ordinarily think of a sound wave in a gas as consisting of coupled pressure and displacement oscillations. However temperature oscillations always accompany the pressure changes. The combination of all these oscillations, and their interaction with solid boundaries produces a rich variety of Thermoacoustic effects. Although these effects as they occur in everyday life are too small to be noticed, one can harness extremely loud sound waves in acoustically sealed chambers to produce powerful heat engines, heat pumps and refrigerators. Whereas typical engines and refrigerators have different moving parts Thermoacoustic engines and refrigerators have almost a single flexing moving part (loud speaker) with no sliding seals.
In thermoacoustic primemovers heat flow from a high temperature source to a low temperature sink generates acoustic power (Which may be converted into electric power using a transducer). In thermoacoustic heat pumps and refrigerators acoustic power is used to pump heat from a low temperature source to high temperature sink.
Thermoacoustic devices may be of practical use where simplicity, reliability or low cost is more important than the highest efficiency.

I anticipate that this affected a new beachcomber of analysis and development in algidity technologies. Existing technologies are getting acclimatized to new chemicals, processes are getting aesthetic to become added activity efficient, and avant-garde approaches to algidity are getting tested.




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Refrigerator filter

please read http://studentbank.in/report-thermoacous...ull-report for technical details of Thermo Acoustic Refrigeration seminar report

hi
i am jitendra, from orissa , i want information about thermoacoustic refrigeretion and guidelines for doing this project .........
i will be grateful if u reply...
regards..........

This project was undertaken at the penn state uty. thermoacoustic refrigeration at high amplitudes has married a high power acoustic driver (up to 100 W of acoustic power) to the resonator of the STAR(The Space Thermoacoustic Refrigerator) refrigerator

Overview of the device
The STAR has the ability to move about 5 Watts of heat and exhibited a peak coefficient of performance relative to Carnot about 20%.


The drivers for this refrigerator are 55% electric-to-acoustic efficient.The Shipboard Electronics Thermoacoustic Cooler (SETAC) dirver drives the STAR resonator. It allowed the study of the effect of nonlinear effects. at high acoustic amplitude, the power density of a thermoacoustic device varies as the square of the acoustic pressure amplitude. As a result, the study at these pressures becomes very important.

Details of Frankenfridge
Measurement of Exhaust Heat Flux
as a test bed for thermoacoustic components, A water circulation loop coupled to the hot heat exchanger has been added to the resonator in this project.
Heat Exchanger Model
the temperature sensors for the hot and cold side are mounted externally on the body of the resonator, very close to the hot and cold heat exchangers.
DeltaE Model
a linear computer model that predicts Frankenfridge performance and the actual measured performance are compared using the computer program called DeltaE
For further details, refer these links:
http://studentbank.in/report-thermoacous...ull-report
http://acs.psu.edu/thermoacoustics/refri...fridge.htm
http://freepatentsonline5647216.html

refer these pdf too:
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hello.....
i m vishal pls. tell me about how ready my project.....

You have a very cool project their. I think you have the talent to those this project more often. Just don't lose hope and you will find the way to your success.