Dissertation > Excellent graduate degree dissertation topics show

Numerical Simulation of Displacement Ventilation’s Influence on Air Quality Indoor

Author: YangZhongGuo
Tutor: XieAnGuo
School: Liaoning University of Science and Technology
Course: Thermal Power Engineering
Keywords: displacement ventilation numerical simulation air quality flow field
CLC: TU834
Type: Master's thesis
Year: 2009
Downloads: 13
Quote: 0
Read: Download Dissertation

Abstract


Displacement ventilation is a new ventilation mode. Compared to traditional ventilation, it not only makes the indoor condition working area obtain a higher air quality and a thermal comfortableness, but also a higher ventilation efficiency.Displacement ventilation is a mode that supplies the air from a low part of the room by slow speed, the airflow moving slowly upward by the laminar condition that similar to piston flow. When arrived a certain height, enduring the influence of heat source and the roof, and causing turbulence phenomenon and turbulent zone, flow thermal layer phenomenon. Because displacement ventilation can solve two problem that is, energy-saving of air condition and the improvement of air quality indoor, it got more and more popular among the people..This paper established a set of complete ventilation model, structured geometry model and divided grid for the air- conditioned room with displacement ventilation, numerical simulation calculated the flow field, established a theory foundation for the next work.Adopted k -εtwo-equation turbulence model and the method of wall plane function described the flow of air-conditioning indoor, and dispersed the equation by finite volume method. Simulation calculated the fields of pressure, of speed, of temperature and the CO2 concentration of different indoor condition. Analyzed and studied the influence that sendoff wind temperature, its speed and location of wind supply inlet have impact on air quality indoor. Achieved and conformed the thermal hierachical height of model. Compared the displacement ventilation with mixed ventilation of the same sendoff wind condition and boundary condition. It’s has important reference value to evaluate the air quality indoor of displacement ventilation and guide the energy-saving of air conditioning.

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. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  18. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3
  19. Analysis of the Impact of Tailings Dam Stability under Seepage Role,TV649
  20. The Effect of Frequencycontron on Flow Fields Environment in Bulk Curing Barn and Quality of Flue Cured Tobacco,S572
  21. Study on Hydraulic Fracturing of Low Permeability Reservoir,P618.13

CLC: > Industrial Technology > Building Science > Housing construction equipment > Air-conditioning, heating, ventilation,and its equipment > Ventilation, dust,air purification,dehumidification
© 2012 www.DissertationTopic.Net  Mobile