Effects Of Compression Refrigeration

The harmful effects of conventional vapour compression refrigeration are aplenty. From the CFCs depleting the ozone layer to the high wear and tear of moving components, shortcomings of conventional refrigeration has fuelled the need for a better, safer and clean alternative.
Thermoacoustic refrigerator is a special kind of device that uses energy of sound waves or acoustic energy to pump heat from low temperature reservoir to a high temperature reservoir.
Thermoacoustics in the broadest sense is the phenomenon in which either sound is generated by a heated surface, or heat is moved from one place to another by sound. The thermoacoustic effect of which our project will take advantage is the latter of the two. Put simply, a thermoacoustic refrigerator creates a temperature gradient across a stack as a by product of induced resonance within a tube. The

In order to accomplish this some input of energy is needed. The two major methods of refrigeration in use today are the vapour compression cycle and the slightly less common absorption refrigeration cycle. Vapour compression refrigerators are most common in residential and commercial refrigeration systems. This refrigeration system takes mechanical work as an input via a compressor to extract heat from a cold environment and expel it to ambient. The basis of the cycle is compression of a vapour refrigerant into a superheated state via mechanical work, condensing the vapour by expelling heat to ambient, throttling the vapour to a cold saturated mixture, and externally absorbing heat from a refrigerated space. Absorption chillers take heat as an input to accomplish the same task. In this case the refrigerant is typically ammonia or lithium bromide. The cycle is similar, but in place of a mechanical compressor there is a thermal compressor which absorbs heat as energy and requires very little mechanical work as an