Numerical Simulation and Modeling of Thermosyphon Using PIV Method

Bastankhah, Majid | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42814 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Saeedi, Mohammad Hassan
  7. Abstract:
  8. Heat pipe is a device with several applications in various industries such as electronics cooling, nuclear and renewable technologies. This apparatus transfers heat from a hot source to a cold one. Thermosyphon is a special type of heat pipe that transmits heat using gravitational forces. Although scholars have performed many experiments on thermosyphon, mostly they were about the thermal characteristics of thermosyphon and rarely the hydraulic specifications of thermosyphon have been investigated. But it is clear that these two specifications (thermal, hydraulic) relate to each other closely and detailed study about their interaction may bring out better results. In this thesis, initially a transparent thermosyphon was designed and fabricated. Then it was investigated using particle image velocimetry method (PIV). Also in addition to experimental results, numerical results have been extracted as well. The effect of inclination heat influx intensity and dynamic behavior of thermosyphon on its efficiency have been experimentally and numerically studied. Both experimental and numerical results are in a good agreement. According to the results, the thermosyphon has the best performance in the horizontal manner. Also as the heat influx increases, the mass flow rate in the main loop of thermosyphon increases. At thermosyphon startup, the flow rate in the main loop of thermosyphon increases until the thermosyphon reaches the steady state condition. After that, the mass flow rate remains constant approximately.

  9. Keywords:
  10. Thermosiphons ; Numerical Method ; Particle Image Velocimetery (PIV)

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