Three Dimensional Simulation and Experimental Modeling of Two Stage GM Type Pulse Tube Refrigeration with Double-Inlet

Ashouri, Mahyar | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49986 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Saidi, Mohammad Hassan
  7. Abstract:
  8. There are numerous ways available to achieve low temperatures that cryocoolers might be among the most important of them. In the meantime, the pulse tube refrigerator has a special place due to its simple geometry and not be using any moving parts. This simple property make the pulse tube refrigerator one of the most popular methods to achieve low temperatures. Nowadays, a pulse tube refrigerator is used for cooling in the range of 4 to 123 Kelvin in two form of one-stage and two-stage and up to an approximate power of 1 KW. Today, due to the temperature and the amount of power required for cooling, as well as the time it takes to reach that temperature, this chiller is used in medical, military, aerospace fields. In this research, with the least possible assumptions, a three-dimensional simulation of a two-stage pulse tube refrigerator in two conditions was considered. Simulation is divided into two parts. The first part of the simulation is model of being capable to be construct using available materials in the country. In this section, stainless steel 304 and lead are used for regenerator design. In the second part, a model is proposed to be capable of reaching temperature about 4.2 Kelvin. In regenerator of the second model, stainless steel 304, lead, oreum-nickel have been used. In the following it comes a separate section for making the chiller and also the results of the test. Finally, the bugs in the process of making the machine and the reasons for not reaching the optimum temperature are expressed
  9. Keywords:
  10. Pulse Tube Refrigrator ; Regenerator ; Numerical Solution ; Helium Gas ; Three-Dimensional Simulation

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