Heat and Mass Transfer in Fibrous Materials. Theory and Applications. A.K. Haghi S. Thomas L.A. Pothan ATLANTIC PUBLISHERS & DISTRIBUTORS (P) LTD

Transcription

1 Heat and Mass Transfer in Fibrous Materials Theory and Applications A.K. Haghi S. Thomas L.A. Pothan ATLANTIC PUBLISHERS & DISTRIBUTORS (P) LTD

2 Preface v Nomenclature (Part 1) xii PART 1 THEORY 1. Basic Concepts of Heat Transfer Through Fabrics Introduction Heat Convection Heat Transfer Conduction Heat Transfer Radiation Heat Transfer Combined Heat Transfer Coefficient Porosity and Pore Size Distribution in Fabric Moisture Permeation of Clothing: A Factor Governing Thermal Equilibrium and Comfort Moisture in Fibers Convection Heat Transfer in Textiles Introduction Effect of Humidity on the Drying Rate Constant Rate Period and Falling Rate Period Convective Heat Transfer Rate Equilibrium Moisture Content Inversion Temperature 25

3 vjjj 2.6. Mass Transfer Dry Air and Superheated Steam Heat Setting Process Convective Heat and Mass Transfer Coefficients Convective Drying of Textile Material: Simple Case Capillary Flow of Free Water Movement of Bound Water Vapour Flow Macroscopic Equations Governing Heat and Mass Transfer in Textile Material Generalized Darcy's Law Mass Conservation Equations Energy Conservation Equations Thermodynamic Relations Heat and Mass Transfer of Textile Fabrics in the Stenter Conduction Heat Transfer in Textiles Introduction First Law of Thermodynamics Second law of Thermodynamics Heat Conduction and Thermal Conductivity Thermal Conduction Mechanisms Mass Diffusion and Diffusivity Conduction Heat Transfer in Textile Fabric Radiation Heat Transfer in Textiles Introduction Background Basic Concepts of Microwave Heating 70

4 ix 4.4. Heat and Mass Transfer Classical Equations Heat and Mass Transfer Exponential Model Combined Microwave and Convective Drying of Tufted Textile Material Heat and Moisture Transfer in Textiles with Particular Reference to Clothing Comfort Introduction and Background Effective Thermal Conductivity Transport Phenomena for Sweat Factors Influencing the Comfort Associated with Wearing Fabrics Interaction of Moisture with Fabrics Moisture Transfer in Textiles Water Vapour Sorption Mechanism in Fabrics Modeling 105 PART 2 APPLICATIONS 6. Effects of Beam Radiation on Microwave Dried Fibrous Materials Introduction Electron Beam Technology Commercial Use of Electron Beam Technology Theory The Origin of the Signals Experimental Studies Results and Discussions Conclusion Microwave Drying of Fabrics for Productivity Improvement: A Computational Approach Introduction 132

5 7.2. Experimental Analysis of Heat and Moisture Transfer Modeling Drying Process of Infinite Solid Slab Products Dincer and Dost Model Factorial Technique Method Selection of the Useful Limits of the Drying Parameters Developing the Design Matrix Development of a Mathematical Model Checking Adequacy of the Model Results and Discussion Experimental Results Dincer and Dost Model Factorial Technique Conclusion Analytical Determination of the Drying Characteristics Introduction Background Materials and Methods Mathematical Modeling Results and Discussion Conclusion A Detailed Study on Combined Infrared-Microwave Drying Process of Tufted Textile Materials Introduction Literature Review 168

6 xi 9.3. Theory Materials and Methods Experimental Details Results and Discussion Conclusion Kinetics of Moisture and Heat Transfer in Textiles Introduction The Aims of this Project Theory Results and Discussion Conclusion Some Aspects of Heat and Mass Transfer in Textiles Introduction Formulation of the Problem Experimental Results and Discussion Conclusion Appendix 212 Appendix 220 Bibliography 224