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Vortex refrigeration


Posted by: summer project pal
Created at: Sunday 09th of January 2011 07:07:54 PM
Last Edited Or Replied at :Sunday 09th of January 2011 07:07:54 PM
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ade between two limiting vortex cases. One is called the free (irrotational) vortex, and the other is the forced (rotational) vortex. These are considered as below:


Two autumn leaves in a counter-clockwise vortex (reference position).

Two autumn leaves in a rotational vortex rotate with the counter-clockwise flow.

Two autumn leaves in an irrotational vortex preserve their original orientation while moving counter-clockwise.

1.7.1 Free (irrotational) vortex
When fluid is drawn down a plug-hole, one can observe the phenomenon of a free vortex. The tangential velocity v v..................[:=> Show Contents <=:]



magnetic refrigeration ppt


Posted by: shalini.50
Created at: Thursday 22nd of July 2010 10:45:21 AM
Last Edited Or Replied at :Saturday 06th of October 2012 04:39:38 AM
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DESIGN AND FABRICATION OF PULSE TUBE REFRIGERATION SYSTEM full report


Posted by: project report tiger
Created at: Thursday 04th of March 2010 03:01:33 AM
Last Edited Or Replied at :Monday 18th of October 2010 11:41:19 PM
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ave so far been proposed.
1.5.1 Surface Heat Pumping Theory.
In their initial work, W.E.Gifford and R.C.Longsworth suggested that only the gas element traveling between the cold and warm exchangers be responsible for the refrigeration effect. This lead to the concept of pressure ratio below which the pulse tube could not work. But the fact that the pulse tube provides refrigeration performances at very low-pressure ratios implies that heat is pumped from the cold end to the warm end of the pulse tube step by step, provided that there exist proper thermal interactions between the gas elements..................[:=> Show Contents <=:]



magnetic refrigeration full report


Posted by: project report tiger
Created at: Wednesday 17th of February 2010 03:44:18 AM
Last Edited Or Replied at :Friday 20th of July 2012 12:39:48 AM
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tional vapor compression refrigeration. Magnetic refrigeration is based on phenomenon called magneto caloric effect. A quick review of the different stages of development made in magnetic refrigeration is done in this paper. And a proto type of magnetic refrigerator that works at room temperature is discussed .the magnetic material is cyclically magnetized and demagnetized by permanent magnets in an adiabatic process. Even water can be used as a heat exchanger and no use harmful gases. The maintenance required for magnetic refrigerator is very small compared to vapor compression refrigeration ..................[:=> Show Contents <=:]



thermoacoustic refrigeration full report


Posted by: project report tiger
Created at: Monday 15th of February 2010 01:53:06 AM
Last Edited Or Replied at :Friday 06th of March 2015 06:58:40 AM
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ally powered TAR
spacecraft applications
Superconductivity
Cooling of computer chips


CONCLUSION

Thermoacoustic effects occur in everyday life are too small

low cost is more important than efficiency

Considerable study requires to reach acoustic devices to their full poten..................[:=> Show Contents <=:]



thermoaccoustic refrigerator


Posted by: gopikrishna303
Created at: Thursday 21st of January 2010 09:20:23 AM
Last Edited Or Replied at :Friday 22nd of January 2010 09:16:52 AM
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i need pp..................[:=> Show Contents <=:]



Magnetic Refrigeration


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 12:37:41 PM
Last Edited Or Replied at :Monday 11th of March 2013 04:11:11 AM
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nown as ferromagnets, tend to heat up. As heat is applied, the magnetic moments align. When the field is removed, the ferromagnet cools down as the magnetic moments become randomly oriented. ...................[:=> Show Contents <=:]



Thermo Acoustic Refrigeration


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 12:25:25 PM
Last Edited Or Replied at :Thursday 06th of June 2013 12:21:26 AM
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d waves and this theory was first developed in 1960s. Unlike vapour compression system, Thermo acoustic engines uses inert gases which is safe and no adverse effect on the atmosphere like the depletion of ozone layer and global warming.

Even though acoustic Refrigeration is efficient and cost effective its commercial application is warranted the need of more R&D efforts for technology up gradation and standardization without which its efficiency utilization can not be increased at least at par with the traditional vapour compressor counterpart. The paper deals with the basic concept of t..................[:=> Show Contents <=:]



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