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Exergy Analysis of Thermoacoustic Heat Pump with Industrial Application

Karimi, Mohsen | 2013

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 45381 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Ghorbanian, Kaveh
  7. Abstract:
  8. Typical thermoacoustic systems deal with the conversion of heat energy to sound energy and vice versa. Recent advances in the field of thermoacoustics have altered the working mechanism of many conventional heating and cooling devices. These systems have three highlighted advantages: first, they have simple structure, no moving parts, low cost of manufacture, and high reliability; second, by using inert gases as working fluid, they are environmentally friendly; and finally, heat driven thermoacoustic devices can be driven by low quality energy sources such as waste heat and solar energy.
    The main focus of the present thesis is on the application of the thermoacoustic technology in the small gas turbine power plants. The present work can be divided into main three sections: thermoacoustic modeling, design and optimization of the thermoacoustic devices and application of thermoacoustic in small gas turbine power plants. In the modeling section an analytical solution is presented for the thermoacoustic equations in the linear regime. This model can be used to study the effects of various parameters on the performance of the system. Also, the mentioned approach is able to simulate the themoacoustic systems with arbitrary shaped components such as resonators and stacks. In the second section the design and optimization of a cascade thermoacoustic Stirling engine and heat driven thermoacoustic refrigerator is carried out. A simplified model is developed based on the lumped element model which enables to pinpoint and examine the most important physical characteristics of the system. Then the design and optimization is performed using DeltaEC software. In the third section, possible performance enhancement of small gas turbine power plants through the application of thermoacoustic systems is examined. Novel combined cycles are introduced; and Energy and exergy analysis of the novel cycles are carried out and discussed.
  9. Keywords:
  10. Thermoaqustic Refrigerator ; Optimization ; Exergy Analysis ; Gas Turbines ; Analytical Method ; Heat Pumps

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