i want full seminar report on thermoacoustic
refrigerator ....etc

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advantages and disadvantages of thermoacoustic refrigeration pdf

Thermoacoustic engines (sometimes called TA engines) are thermoacoustic devices which use high-amplitude sound waves to pump heat from one place to another, or conversely use a heat difference to induce high-amplitude sound waves. In general, thermoacoustic engines can be divided into standing wave and travelling wave devices. These two types of thermoacoustics devices can again be divided into two thermodynamic classes, a prime mover (or simply heat engine), and a heat pump. T ....etc

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advantages and disadvantage of light alarm circuit with ldr

The dominant of street lights, outside lights, a number of indoor home appliances, and so on are typically operated and maintained manually on many occasions. This is not only risky, however additionally leads to wastage of power with the negligence of personnel or uncommon circumstances in controlling these electrical appliances ON and OFF. Hence, we can utilize the light sensor circuit for automatic switch OFF the loads based on daylight s intensity by employing a light sensor. Thi ....etc

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ABSTRACT
Thermo acoustic have been known for over years but the use of this phenomenon to develop engines and pumps is fairly recent. Thermo acoustic refrigeration is one such phenomenon that uses high intensity sound waves in a pressurized gas tube to pump heat from one place to other to produce refrigeration effect. In this type of refrigeration all sorts of conventional refrigerants are eliminated and sound waves take their place. All we need is a loud speaker and an acoustically insulated tube. Also this system complet ....etc

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Thermoacoustic Refrigeration



How it works

Moving coil Loudspeaker
Inside 2 magnets with metal coil between them, current is induced causing coil to move
Creates sound waves up to 200 dB!
Resonator where gas cooling and compression take place
Uses inert gas, commonly Helium
Stack
Series of small parallel channels through which pressure and velocity of waves change
In between the heat exchangers
Heat Exchangers
Hot heat exchanger to remove excess heat
Cold heat exch ....etc

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Technology is changing every day and what seems the best selling thing today might not be sold at all in near future.None of the OS developed by any company are going to stay the best forever and new & better OS will overtake them.

Tizen OS is one of the OS which is developed to rule the market for long. Earlier iOS by Apple was launched & it ruled the market for a long time but Apple devices being expensive could not reach a height. It was soon replaced by another OS , Android OS launched by Google and today most of the market is covered wi ....etc

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Thermoacoustic Stirling Engines
Abstract:
Sound waves in thermoacoustic engines and refrigerators can replace the pistons and cranks that are typically built into such machinery. Over the past two decades, physicists and engineers have been working on a class of heat engines and compression-driven refrigerators that use no oscillating pistons, oil seals or lubricants. These so-called thermoacoustic devices take advantage of sound waves reverberating within them to convert a temperature differential into mechanical ene ....etc

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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 (SE ....etc

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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 i ....etc

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Hi,can anyone please explain about the advantages and limitations of Thermo acoustic refrigerator when compared to VCRS other than eco friendly ....etc

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