International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
www.irjet.net
e-ISSN: 2395 -0056 p-ISSN: 2395-0072
Design, Fabrication and Analysis of Thermo-Acoustic Refrigeration System – A Review 1 B.E.,
Saurabh Karokar1, Rajjat Satpute1, Rohan Parate1, Ritesh Giri1, Rahoul Chitare1, Satish Sonwane2
Department of Mechanical Engineering, Dr. . Babasaheb Ambedkar College of Engineering & Research, Wanadongari, Nagpur – 441110, Maharashtra. INDIA. 2 Assistant Professor, Department of Mechanical Engineering;Dr. Babasaheb Ambedkar College of Engineering & Research, Wanadongari, Nagpur – 441110, Maharashtra. INDIA. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Thermo-acoustic refrigeration is an
environmental friendly technology. It is use as a working fluid like air or Noble gases as a refrigerant. Its biggest advantage is that they do not use harmful gas as a refrigerant and pollutant free method of providing refrigeration. For the safety of the environment, it is necessary to avoid the use of environmentally hazardous refrigerants by developing new alternative refrigeration technologies such as Thermoacoustic Refrigeration System. This paper describes the variation of hot end temperature and the temperature difference between the different stack ends with the various parameters like frequency, mean pressure. This paper explored the basic principles of thermo acoustic refrigeration, combined with an understanding of the underlying thermodynamics, the model enables us to spread awareness of the visibility of thermo acoustic devices as refrigerator. Thermo acoustics is a field that combines thermodynamics, fluid dynamics and acoustics. In thermo acoustics it is possible to construct thermodynamic engines, prime movers and heat pumps which respectively use heat to create work and use work to create or move heat. The only disadvantage of this thermo-acoustic refrigeration is it has low C.O.P compare to other conventional cooler. But most efficient system are tried to be made. Lots of research is going on in this area. Key Words: Refrigerant, Stacks .
1.INTRODUCTION Just by using the power of sound the thermo-acoustic refrigeration system can be able to reduce the cost of refrigeration as well as to reduce the environmental hazard. In the recent years the induction of thermo-acoustic technology has been used for the development in the field of non conventional energy. Modern thermo-acoustic systems are majorly based on linear thermo-acoustics models. This system involves no adverse chemicals or environmentally unsafe elements and is also capable to utilize waste heat coming out from the gas in any heat pump or other heat engine to produce acoustic power. Thermo-acoustics deals with the conversion of heat energy to sound energy and vice © 2017, IRJET
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Impact Factor value: 5.181
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versa. There are two types of thermo-acoustic devices: thermo-acoustic engine (or prime mover) and thermoacoustic refrigerator. In a thermo-acoustic engine, heat is converted into sound energy and this energy is available for the useful work. In this device, heat flows from a source at higher temperature to a sink at lower temperature. ln a thermo-acoustic refrigerator, the reverse of the above process occurs, i.e., it utilizes work (in the form of acoustic power) to absorb heat from a low temperature medium and reject it to a high temperature medium. Thermo-acoustic refrigerator, which does not use any environmentally-unfriendly refrigerants like CFCs and HFCs. Instead, it depends upon the power of sound to generate oscillations required to compress the working gas. The process of refrigeration means the cooling the desired space and maintaining the temperature below the ambient temperature. Acoustics deals with study of sound production, transmission, and effects. Thermo-acoustic deals with thermal effects of the sound waves and the interconversion of sound energy and heat. Sound waves travel in a longitudinal fashion. They travel with successive compression and rarefaction of the medium in which they travel (gaseous medium in this case). This compression and expansion respectively lead to the heating and cooling of the gas. This principle is employed to bring about the refrigeration effect in a thermo-acoustic refrigerator. The efficiency of the thermo-acoustic devices is currently lower than that of their conventional counterparts, which needs to be improved to make them competitive. In addition, other considerations for a competitive thermo-acoustic device are low cost, high reliability, safety, compactness and ease of mass production.
2. LITERATURE REVIEW Jinshah B S, Ajith Krishnan R, Sandeep V S [1] completed theoretical, numerical and experimental studies to identify optimum operating conditions for the design, fabrication, and operation of a thermo-acoustic refrigerator. They ISO 9001:2008 Certified Journal
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