Loading...

A Numerical Model Development for Cryogenic Spiral Wound Heat Exchanger Design Considering Temperature dependent thermo-physical properties, Heat Leakage, and Longitudinal Heat Conduction

Beheshtikhoo, Amir | 2021

256 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54566 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Afshin, Hossein
  7. Abstract:
  8. Cryogenic temperature is below than 123 Kelvin and any physical study that occurs below this temperature is Cryogenic science. Cryogenic has varaiety of application in medical, industry, food, oil and gas etc. Based on this paper and its relavant source spiral wound HE is one of the most optimum HE for cryogenic application specially for helium liquification cycle. In order to liquefy helium in helium cycle efficiency of spiral wound HE shall be over than 85 percent. For this reason and special fluid behavour in low temperature considering property variation, heat in leak and axial conduction is vital for calculating efficiency in cryogenic temperature of helium liquification cycle. In this research numerical code that rates channel type HE has been developed and verified basis on nellis paper with considering above conditions. Next code has been changed geometry to spiral wound HE geometry to generate designing code for spiral wound HE. In order to verify designing code, 3 dimensional CFD model has been modeled and output of this model has been compared to result of designing code. Results of comparison showed that accuracy of code is good. Error of this result was less than 5.5 percent for both pressure and temperature. At the end spiral wound HE has been designed for 90% efficiency with specific condition and effect of geometry parameters such as tube diameter, number of layer, longitudinal pith and radial pitch to tube diameter has been studied
  9. Keywords:
  10. Optimization ; Numerical Solution ; Spiral-Wound Heat Exchanger ; Cryogenic Treatment ; Helium Liquefaction ; Conduction Heat Transfer ; Heat Leakage ; Property Variational

 Digital Object List

 Bookmark