Dissertation > Excellent graduate degree dissertation topics show

Numerical Simulation of Nano-TiO2Air Cleaning Devices Based on Optical Fiber Technology

Author: DengYiSheng
Tutor: HeGuoGeng
School: Huazhong University of Science and Technology
Course: Refrigeration and Cryogenic Engineering
Keywords: Air purification photocatalytic gas-solid two-phase flow the trajectory of particles numerical simulation wall chemical reaction
CLC: TU834.8
Type: Master's thesis
Year: 2013
Downloads: 16
Quote: 0
Read: Download Dissertation

Abstract


Contemporary architecture use more closed decoration, decoration materials andfurniture spilled out formaldehyde, ammonia, benzene, particles, biological contaminantsand volatile organic compounds, so people paid more and more attention on indoor airpurification technology. In this paper we analyzes nano-TiO2photocatalytic degradationmechanism of organic pollutants in the air and introduced a device of photocatalyticdegradation of organic compounds based on fiber optic technology——mop fan, wesimplify the device, in this paper， we have done some gas-solid flow numerical analysisand wall reaction numerical analysis.Common experimental methods are organic particles flow along the fiber direction andcontingency attached on the fiber, and none of the numerical simulation of chemicalreaction process and distribution of organic particles in the device has been done. Themain innovations of this paper is that the organic particles cross swept the fibers andcollision with the fibers，during the multiple collisions a catalytic reaction has reacted, andwe simulated the catalytic reaction of organic particles in the device.Four boundary conditions for the deviceare used in this paper, they are：Velocityinletboundary condition, outflow boundary condition, pressure outlet boundary conditionand wall boundary condition.Velocity Inlet boundary conditionis used in discrete phasesimulation and wall chemical reaction simulation, outflow boundary conditions is used inthe discrete collision simulation，pressure outlet boundary conditions is used in the thewall chemical reaction outlet conditions, all other boundary is set as the wall boundaryconditions, the default setting is no-slip condition.This paper use CFD software to simulate the collision between organic particles andfiber from different fiber arrangement, different fiber diameters and different inlet velocity,and analysed the trajectory and the residual time of particles in the device，after thesimulation we got two optimum devices. The paper also use user-defined chemicalreaction model to simulate the photocatalytic chemical reaction the in the device, thesimulation based on the organic particles’ chemical reaction analogous to the pulverizedcoal combustion chemical reaction，after simulation we got a most optimum device model.

Related Dissertations

  1. Preparation and Photocatalytic Properties for Water Decomposition of Titanate Photocatalyst,O643.36
  2. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  3. Study on Springback of High-Strength Steel Stamping,TG386
  4. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  5. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  6. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  7. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  8. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  9. Studies on Synthesis, Characterization and Properties of Fe-V Co-doped TiO2 Catalyst,O614.411
  10. Investigation of Fabrication, Characterization and Property of Fuctional Titanium Dioxide Nanoporous Materials,TB383.1
  11. Study on Hydraulic Fracturing of Low Permeability Reservoir,P618.13
  12. On the Simulant Research of the Pneumatic Cleaning Mechanism of Mini-combine Harvester,S225.3
  13. Combination Degradation of Chlor Pyrifos Via Biodegradation and Photodegradation,X592
  14. Preparation and Photocatalytic Properties of Semiconductor Oxides,O643.36
  15. Degradation of microcystin and Elimination Methods,X173
  16. Fault combinations on water inrush and Its Prevention Research,TD745
  17. Wind turbulence characteristics of the bulk particulate matter pollution impact study wind erosion,X513
  18. Changchun High- temperature low-pressure ridge containing wax reservoir development and technological measures,TE349
  19. Coal mining impacts on groundwater numerical simulation,TD741
  20. Dai Shun Mine Collapse Column 4325 track characteristics and control technology research and development,TD745
  21. Study of Water-Inrush Danger Forecast of Coal Seam Floor Based on Multi Factor’s Fuzzy Clustering Approach,TD745

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