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Numerical Investigation of Using Porous Media Combustion in a Thermophotovoltaic Power Generator

Ghafarzadeh, Mahdi | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 44384 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Sadrhosseini, Hani; Zohoor, Hassan
  7. Abstract:
  8. One of the new technologies for direct energy conversion at micro scale is micro thermophotovoltaic (micro TPV). The main part of a micro TPV system is micro combustor. The ultimate goal in the design of this part is reaching to a uniform and high temperature profile along the micro combustor wall. One of the ways to reach this goal in the macro scale is the porous media combustion. In the present work, a one dimensional numerical code is developed to investigate the effect of porous media on micro combustor of a micro TPV power generator. To increase the accuracy of the results, a multi-step reaction mechanism and temperature dependent thermophysical properties will be used. The numerical results show that packing the system with SIC porous matrix increases the maximum and mean temperature about 34K and 220-276K respectively. Also, it is obtained the temperature profile that is more uniform along the emitter and it is a good enhancement in the micro TPV applications. It results in 0.5%-0.8% increment of overall efficiency of the system. Also, the effect of various parameters including the length of micro combustor, porosity, mixture equivalence ratio, and convection heat transfer coefficient on the performance of the micro TPV device has been investigated
  9. Keywords:
  10. Micro Thermophotovoltaic System ; Microcombustion ; Porous Media ; Numerical Simulation

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