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Design of a Thermoacoustic Refrigerator Based on the Airport Noise Absorption

Basiri, Moein | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49803 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Soltani, Mohammad Reza
  7. Abstract:
  8. In the last few decades, the consumption of fossil fuels and its increasing worldwide price on one hand, and the severity of global warming on the other hand have led researchers and engineers to invent and expand new cooling technologies. Cooling has the largest portion of energy consumption of households during the hot season of a year. In addition to high energy consumption, the common cooling systems utilize gases which are harmful for environment. Thermoacoustics is a new and recent technology which has arised from combination of acoustics and thermodynamics. In Iran, research in this new field was pioneered by Ghorbanian in Department of Aerospace Engineering at Sharif University of Technology in the early 2000s. Thermoacoustics systems have some important advantages including; not having moving parts, not using harmful gases, simple construction. These significant benefits have drawn attention to these systems. This thesis is proposing a new method in order to provide the acoustic power required for thermoacoustic refrigerator, using acoustic waves existing in areas with excessive noise pollution like airports. In other words, by collecting soundwaves of airports and letting them to enter a thermoacoustics refrigerator, the essential power for the refrigerator can be provided. In this way, not only some part of noise pollution can be prevented, but also a considerable amount of required cooling for airports will be supplied without causing any harm to the environment. In this paper, we first investigate the acoustic waves produced by noise and sound in airports, then in the next step, the thermoacoustic refrigerator system is designed conceptually. Moreover, using one dimensional linear thermoacoustic equations, we design and optimize the refrigerator. In the process of optimizing the design, which is done based on maximizing the coefficient of performance of the refrigerator, we obtain the final geometric dimensions of major parts of the system including regenerator, compliance, thermal buffer tube, and resonator. Finally, we examine the performance of the system in various working conditions, and study the effect of change of different environmental parameters on the refrigerator
  9. Keywords:
  10. Airports ; Optimization ; Noise ; Regenerator ; Thermoacoustic Refrigarator

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