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CFD Simulation and Analysis of Heat Pipe Heat Exchanger Radiator

Abed Niari, Saeed | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52776 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Shafii, Mohammad Behshad
  7. Abstract:
  8. Due to the development of heat pipes in different industries and special characteristics of heat pipes, in this study, it has been tried using computational fluid dynamics (CFD) method to simulate a heat pipe heat exchanger that can be a replacement for the normal radiator. The experimental model of this heat exchanger has been tested at past studies and the numerical simulation of the heat exchanger will analyze at present study. The use of heat pipe in the car radiator has many advantages such as reducing fluid pressure drop through the heat exchanger, high reliability due to the particular structure of the heat exchanger (individual performance of each heat pipe) and improving heat transfer. In this thesis, the heat exchanger is located in contact with the hot fluid (water) and the condenser to contact the air. To simulate this heat exchanger using CFD method, heat pipes were considered as solid rods with constant conductivity. Considering the complexity of phase change process. In order to calculate the thermal conductivity coefficient of the heat pipe, the proposed relations are used for effective thermal resistance of total heat pipe.The results are investigated in order to analyse the possibility of using constant thermal conductivity for CFD model. also, the CFD model has been investigated for three mode with 28 fins with a total of 35 fins and without fins, the results show improvement of the radiator performance by increasing the number of fins
  9. Keywords:
  10. Effective Thermal Conductivity ; Radiators ; Numerical Simulation ; Thermosiphons ; Computational Fluid Dynamics (CFD) ; Heat Pipe ; Heat Pipe Heat Exchanger

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