Dissertation > Excellent graduate degree dissertation topics show

Numerical Simulation of Heat Transfer Enhancement in Spiral Groove Tube

Author: HuangPeng
Tutor: ZhaoJianHui
School: Xi'an University of Science and Technology
Course: Heating,Gas Supply, Ventilation and Air Conditioning Engineering
Keywords: Spiral Groove Tube Heat Transfer Enhancement Numerical Simulation Performance Evaluation
CLC: TK124
Type: Master's thesis
Year: 2011
Downloads: 190
Quote: 3
Read: Download Dissertation

Abstract


With the rapid development of modern industry, energy is in short apply and the price is rising day by day. Energy-saving becomes the urgent matter and people all over the world are looking for new energy sources and searching for new ways to save energy. Technologies of heat transfer enhancement, which can improve the efficiency of heat exchanger and reduce the weight and volume of heat exchange equipments, are always attracted by scientists and engineers. The research on high-effective special shape tube for enhanced heat transfer is the most active and important research subject in heat transfer field. Spiral groove tube is one of the most important one, because of its simple frame, cheap cost, wide application, low scaling and is easy to clean , high strengthen effect, lots of peoples show favor towards it.In this paper, the strengthening heat transfer mechanism in spiral groove tube was analyzed. Turbulent flow and heat transfer process in three kinds of spiral groove tube heat exchangers with the cross-section of triangle, rectangle and semicircle were discussed. The 3D models were built and meshed by the software of Gambit, the numerical simulation of flow and heat transfer in these tubes were carried out by applying the Fluent software, from which we got the distribution of temperature field, stress field and the velocity field.Compared the Heat transfer ability and pressure drop in three spiral groove tubes and smooth tube, during the Reynolds number range of 3981~35828, the heat exchange capacity in triangle spiral groove tube was improved by 24%~50% than that in smooth tube, and the heat exchange capacity in spiral groove tubes with the cross-section of rectangle and semicircle was respectively improved by 31%~54% and 34%~61%. However, the resistance coefficient in triangular spiral groove tube increased by 113%~307% than that of smooth tube, the resistance coefficient in rectangular spiral groove tube increased by 116%~342% than that of smooth tube, and 97%~283% increased in semicycle spiral groove tube than that of smooth tube in same Reynolds number. Though the heat transfer ability in three kinds of spiral groove tube have improved obviously, the resistance coefficient are also increased. So the heat transfer enchancement is at the cost of increasing the resistance. Through the comparison of the comprehensive performance evaluation PEC-1 index, it can be seen that the spiral groove tube with the cross-section of rectangular and semicircle is better than the triangular section spiral groove tube at comprehensive heat transfer performance.

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Study on Springback of High-Strength Steel Stamping,TG386
  3. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  4. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  5. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  6. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  7. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  8. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  9. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  10. Numerical Simulation of Biomass Direct Reburning,TK16
  11. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  12. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  13. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  14. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  15. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  16. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  17. The Research on the Performance Results Application of Zhaoqing Power Supply Bureau,F272.92
  18. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  19. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3
  20. Analysis of the Impact of Tailings Dam Stability under Seepage Role,TV649
  21. AI Institute of pay system design and research,G647.5

CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Thermal Engineering Theory > Heat Transfer
© 2012 www.DissertationTopic.Net  Mobile