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Building Physics - Heat, Air and Moisture: Fundamentals and Engineering Methods with Examples and Exercises / Edition 1

Building Physics - Heat, Air and Moisture: Fundamentals and Engineering Methods with Examples and Exercises / Edition 1

by Hugo S. L. Hens
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Product Details

ISBN-13: 9783433018415
Publisher: Wiley
Publication date: 03/28/2008
Edition description: Older Edition
Pages: 284
Product dimensions: 6.50(w) x 9.40(h) x 0.60(d)

About the Author

HUGO HENS is professor at the University of Louvain (K.U. Leuven), Belgium. After four years of activity as a structural engineer and site supervisor, he returned to the university to receive a PhD in Building Physics. He taught Building Physics from 1975 to 2003 and Performance Based Building Design from 1970 to 2005 and still teaches Building Services. Hens is the author of several text books in Dutch on Building Physics, Performance Based Building Design and Building Services. He has authored and coauthored over 150 articles and conference papers, written hundreds of reports on building damage cases and their solution, introduced upgraded, research-based concepts for highly insulated roof and wall construction and directed several programs on building-energy related topics.

Table of Contents


0 Introduction.

0.1 Subject of the Book.

0.2 Building Physics.

0.2.1 Definition.

0.2.2 Criteria. Comfort. Health. Architectural and Material Facts. Economy. Environment.

0.3 Importance of Building Physics.

0.4 History of Building Physics.

0.5 References.

0.6 Units and Symbols.

1 Heat Transfer.

1.1 Overview.

1.2 Conduction.

1.2.1 Conservation of Energy.

1.2.2 Fourier’s Laws. First Law. Second Law.

1.2.3 Steady State. What Is It? One Dimension: Flat Walls. Two Dimensions: Cylinder Symmetry. Two and Three Dimensions: Thermal Bridges.

1.2.4 Transient Regime. What is Transient? Flat Walls, Periodic Boundary Conditions. Flat Walls, Transient Boundary Conditions. Two and Three Dimensions.

1.3 Convection.

1.3.1 Overview. Heat Transfer at a Surface. Convection.

1.3.2 Convection Typology. Driving Forces. Type of flow.

1.3.3 Calculating the Convective Surface Film Coefficient. Analytically. Numerically. Dimensional Analysis.

1.3.4 Values for the Convective Surface Film Coefficient. Walls. Cavities. Pipes.

1.4 Radiation.

1.4.1 Overview. Thermal Radiation. Quantities. Reflection, Absorption and Transmission. Radiant Surfaces.

1.4.2 Black Bodies. Characteristics. Radiation Exchange Between Two Black Bodies: The Angle Factor. Properties of Angle Factors. Calculating Angle Factors.

1.4.3 Grey Bodies. Characteristics. Radiation Exchange Between Grey Bodies.

1.4.4 Colored Bodies.

1.4.5 Practical Formulae.

1.5 Applications.

1.5.1 Surface Film Coefficients and Reference Temperatures. Overview. Inside Environment. Outside Environment.

1.5.2 Steady-state, One-dimension: Flat Walls. Thermal Transmittance and Interface Temperatures. Thermal Resistance of a Non-ventilated Infinite Cavity. Solar Transmittance.

1.5.3 Steady State, Cylindrical Coordinates: Pipes.

1.5.4 Steady-state, Two and Three Dimensions: Thermal Bridges. Calculation by the Control Volume Method (CVM). Thermal Bridges in Practice.

1.5.5 Transient, Periodic: Flat Walls.

1.5.6 Heat Balances.

1.6 Problems.

1.7 References.

2 Mass Transfer.

2.1 In General.

2.1.1 Quantities and Definitions.

2.1.2 Saturation Degree Scale.

2.1.3 Air and Moisture Transfer.

2.1.4 Moisture Sources.

2.1.5 Air, Moisture and Durability.

2.1.6 Linkages between Mass-and Energy Transfer.

2.1.7 Conservation of Mass.

2.2 Air Transfer.

2.2.1 In General.

2.2.2 Air Pressure Differences. Wind. Stack Effects. Fans.

2.2.3 Air Permeances.

2.2.4 Air Transfer in Open-porous Materials. Conservation of Mass. Flow Equation. Air Pressures. One Dimension: Flat Walls. Two- and Three-dimensions.

2.2.5 Air Flow Through Permeable Layers, Apertures, Joints, Leaks and Cavities. Flow Equations. Conservation of Mass, Equivalent Hydraulic Circuit.

2.2.6 Combined Heat- and Air Transfer. Open-porous Materials. Air Permeable Layers, Joints, Leaks and Cavities.

2.3 Vapour Transfer.

2.3.1 Water Vapour in the Air. Overview. Quantities. Maximum Vapour Pressure and Relative Humidity. Changes of State in Humid Air. Enthalpy of Moist Air. Characterizing Moist Air. Applications.

2.3.2 Water Vapour in Open-porous Materials. Overview. Sorption Isotherm and Specific Moisture Ratio. The Physics Behind. Impact of Salts. Consequences.

2.3.3 Vapour Transfer in the Air.

2.3.4 Vapour Transfer in Materials and Construction Parts. Flow Equation. Conservation of Mass. Vapour Transfer by ‘Equivalent’ Diffusion. Vapour Transfer by (Equivalent) Diffusion and Convection.

2.3.5 Surface Film Coeffi cients for Diffusion.

2.3.6 Some Applications. Diffusion Resistance of a Cavity. Cavity Ventilation. Water Vapour Balance in a Room in Case of Surface Condensation and Drying.

2.4 Moisture Transfer.

2.4.1 Overview.

2.4.2 Moisture Transfer in a Pore. Capillarity. Water Transfer. Vapour Transfer. Moisture Transfer.

2.4.3 Moisture Transfer in Materials and Construction Parts. Transfer Equations. Conservation of Mass. Starting, Boundary and Contact Conditions. Remark.

2.4.4 Simplified Moisture Transfer Model. Assumptions. Applications.

2.5 Problems.

2.6 References.

3 Combined Heat, Air and Moisture Transfer.

3.1 Overview.

3.2 Assumptions.

3.3 Solution.

3.4 Conservation Laws.

3.4.1 Conservation of Mass.

3.4.2 Conservation of Energy.

3.5 Flow Equations.

3.5.1 Heat.

3.5.2 Mass, Air. Open Porous Materials. Air Permeable Layers, Apertures, Joints, Cracks, Leaks and Cavities.

3.5.3 Mass, Moisture. Water Vapour. Water.

3.6 Equations of State.

3.6.1 Enthalpy/Temperature and Water Vapour Saturation Pressure/Temperature.

3.6.2 Relative Humidity/Moisture Content.

3.6.3 Suction/Moisture Content.

3.7 Starting, Boundary and Contact Conditions.

3.7.1 Starting Conditions.

3.7.2 Boundary Conditions.

3.7.3 Contact Conditions.

3.8 Two Examples of Simplified Models.

3.8.1 Heat, Air and Moisture Transfer in Non-Hygroscopic, Non-Capillary Materials.

3.8.2 Heat, Air and Moisture Transfer in Hygroscopic Materials at Low Moisture Content.

3.9 References.

4 Postscript.

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