Dissertation > Excellent graduate degree dissertation topics show

Human micro- climate heat and moisture transfer simulation and dress human thermal comfort model

Author: LiuLiYing
Tutor: ZhangWeiYuan
School: Donghua University
Course: Clothing engineering and design
Keywords: Clothing comfort mathematical simulation model of heat and water vapor transmission hot plate model of thermal feeling
CLC: TS941
Type: PhD thesis
Year: 2002
Downloads: 1173
Quote: 18
Read: Download Dissertation

Abstract


The dynamic heat and moisture comfort properties of garments are studied systematically in this thesis, and two models, one describing the dynamical heat and water vapor transmission and the other related to the thermal comfort of clothed body, are developed. The main contents are as follows.1. According to the laws of human body physiology and heat and moisture transmission in fabric, the mechanisms of heat-moisture transmission between clothed body and environment were studied and the calculating formula reflecting the heat and moisture transfer process between the clothed body and environment was presented. Those variations in this equation were discussed. This equation indicate that when human stays in a special environment, his thermal feeling is affected by the statement of human body, clothing and the environment.2. On the basis of the idea of the continuum media and approach, the law of energy and mass conversion and the Stefen diffusion theory, a mathematical model had been developed to describe the dynamic heat-moisture transfer in the clothing microclimate under transient wear conditions. If the physical activity and ambient conditions are specified, the model can predict the thermoregulatory response of the body. This model was discreted with the method of the implicit finite difference of fixed step length, and the program, with which the process of heat and moisture transfer through clothing was simulated, had been designed.3. To confirm this model, a experimental apparatus was set up, which was used to test the water vapor permeability of fabric. This apparatus could deal with data by computer system. Experimental measurements with garments made from fibers with different levels of hygroscopicity were compared with predictions by the model. There was good agreement between prediction and experiment for the temperature and the relative humidity of the clothing microclimate.4. Clothing-comfort assessment by human perception analysis provided a sound basis for comparison of apparel garments under combined microclimates and human-activity levels of normal wear. A series of polyester, cotton, rayon, and polyester/cotton blend fabrics were evaluated and tested respectively in subjective wearer trials and in laboratory. With the method of the main component analysis and the regression analysis, The experimental data were dealt with, and the modelreflecting the thermal comfort feeling model was developed according to those experimental data. The stability, reliability and precision of the thermal comfort model were examined too.

Related Dissertations

  1. Foaming Mesophase Pitch by Supercritical Solvent and Mathematical Simulation of Homogeneous Nucleation,TQ127.11
  2. ANALYTIC STUDY ON PLATE DEFORMATION AND MICROSTRUCTURE EVOLUTION DURING HOT ROLLING,TG331
  3. A Study on Seawater Desalination by Dewvaporation Process,P747
  4. Remediation of MTBE by Air Sparging in Groundwater and Mathematic Simulations,X523
  5. Effects of Levels of Estrogen in Plasma on Susceptibility of Motion Sickness in Mice and Rats,R594.6
  6. Glider aircraft control theory,TJ765
  7. Theoretical and Experimental Study on New Working Fluids of Moderate and High Temperature Water Source Heat Pump,TB65
  8. Microstructure, Mechanical Properties and Heat Transfer on the Moulding of PP Tape,TQ325.14
  9. Monitoring Concentration of Photosensitizer by Fluorescence Spectroscopy during Photodynamic Therapy,R454
  10. Mathematical Modeling of Microwave-vacuum Drying and Its Application in Food Processing,TS205
  11. Analgesic activity of neuropeptide S , and [Tyr ~ 6] γ2-MSH (6-12) levels in the spinal cord pain regulation,R96
  12. The Intelligence Fire Alarm System Based on Fuzzy Neural Network,TU892
  13. PIV Simulation and Optimization for Melt Flow in Continuous Casting of Aluminum Alloy Slab,TG249.7
  14. Simulation Research of a System of Asychronous Motor Variable Frequency and Adiustable Speed Based on Matlab/Simulink,TM343
  15. Neurotoxic Activity of Phospholipase A2 from Agkistrodon Blomhoffii Ussurensis Snake Venom,R99
  16. Research on the Comfort of Nonwoven Madical Protective Clothing,TS176
  17. Study on Flow Control Device in Six-strand Tundish,TF341.6
  18. Optimization of Slab CCTundish Configuration and Molten Steel Flow by Mathematical and Physical Simulation at Linfen Iron and Steel Company,TF777
  19. Research on Automatic Fluid Flow Rate Limiting Device,TH137.9
  20. Sensibility of Estrogen Receptors on Susceptibility of Motion Sickness,R594.6

CLC: > Industrial Technology > Light industry,handicrafts > Garment industry,footwear industry > Garment industry
© 2012 www.DissertationTopic.Net  Mobile