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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 40481 (45)
- University: Sharif University of Technology
- Department: Aerospace Engineering
- Advisor(s): Ghorbanian, Kaveh
- Abstract:
- Thermoacoustics deals with the conversion of heat energy into sound energy and vice versa. This new and emerging technology has a strong potential towards the development of sustainable and renewable energy systems by utilizing waste heat or solar energy. Although thermoacoustic devices are simple to fabricate; however, the design process is very challenging. The thermoacoustic phenomenon is discovered over a century ago; nevertheless, the rapid advancement in this field occurred during the past three decades when the theoretical understanding of the phenomenon is developed along with the prototype devices. There are several advantages of heat engines and refrigerators based on thermoacoustic technology as compared to the conventional ones, i.e., fewer components with at most one moving component, no sliding seals, and no harmful refrigerants or chemicals. Air or any inert gas can be used as working fluids. Further, the fabrication and maintenance costs are low due to inherent simplicity of the thermoacoustic devices. The main components of a typical thermoacoustic engine or refrigerator are a resonator, a stack of parallel plates, and two heat exchangers. One of the most common classification criteria of thermoacoustic devices is the wave type which drives the devices. Consequently, thermoacoustic devices are divided into standing wave or traveling wave thermoacoustic devices. In this work, first, a computational model of a standing wave thermoacoustic heat pump is presented. Using simplified one dimensional equations, simulation is carried out based on the linear thermoacoustic approximation. The velocity, pressure, and energy differential equation are solved across the system. The variation of thermoacoustic parameters is investigated and the results are compared with DeltaE software. The results are in good agreement with that obtained from DeltaE. As a next step, a section by section thermodynamic analysis of the TAHP is performed. For this purpose, energy and entropy conservation equations are employed.
- Keywords:
- Heat Transfer ; Hpeat Pumps ; Simulation ; Heat Exchangers ; Thermoaqustic Refrigerator ; Stack Positioned
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