Operation Analysis of an Open Cycle Thermoacoustic Refrigerator with Mean Flow

Please enable javascript in your browser.

Sadri, Maryam | 2008

531 Viewed

Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39343 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Ghorbanian, Kaveh
Abstract:
In this thesis, flow-through (or open cycle), standing wave thermoacoustic refrigerator is investigated. The system has the characteristics that the working fluid travels through the system in an oscillatory mode with a mean flow. This type of thermoacoustic refrigerator enables the working fluid to reach the desired cold temperature without passing through the usually required cold heat exchanger. Consequently, the cold heat exchanger subsystem becomes redundant and the entire system becomes less complex and lower in fabrication costs. In this research, while the hot and cold temperatures are fixed, a parametric study is performed to determine the alteration in performance due to the variations in geometrical as well as operating parameters. Further, from a thermodynamic point of view, the flow behavior within the stack is explored by means of entropy minimization. The results indicate the existence of an optimum mean velocity for each prescribed set of geometrical and operational parameters
Keywords:
Thermoaqustic Refrigerator ; Mean Flow Interaction ; Standing Waves