Applied Building Physics : Boundary Conditions, Building Performance and Material Properties

by Hens, Hugo S. L. C.

• ISBN13: 9783433029626
• ISBN10: 3433029628
• Edition: 1st
• Format: Paperback
• Copyright: 2010-11-22
• Publisher: Ernst & Sohn

Summary

The energy crises of the 1970s, persisting moisture problems, complaints about sick buildings, thermal, visual and olfactory discomfort, and the move towards more sustainability in building construction have pushed Building Physics to the forefront of building innovation. The societal pressure to diminish energy consumption in buildings without impairing usability acted as a trigger to activate the whole notion of performance based design and construction. As with all engineering sciences, Building Physics is oriented towards application, which is why, after a first book on fundamentals this second volume examines performance rationale and performance requirements. Outdoor and indoor climate conditions are described and calculation values are discussed, the performance concept is specified at the building level and at the building envelope level, and heat-air-moisture material properties are defined. The book incorporates 35 years of teaching Building Physics to architectural, building and civil engineers, bolstered by 40 years of experience, research and consultancy.

Author Biography

Prof. Em. Dr. IR. Hugo S.L.C Hens, Katholieke Universiteit Leuven (Belgium), taught Building Physics from 1975 to 2003, Performance Based Building Design from 1970 to 2005 and Building Services from 1975 to 1977 and 1990 to 2008. He has authored and co-authored over 150 articles and conference papers, and written hundreds of reports on building damage cases and their solution. He has been coordinating the international working group CIB W40 on Heat and Mass Transfer in Buildings for ten years. Between 1986 and 2008, he was operating agent of 4 Annexes, initiated by the International Energy Agency's EXCO on Energy Conservation in Buildings and Community Systems: Annex 14, Annex 24, Annex 32 and Annex 41. He is a fellow of the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE).

Table of Contents

Preface

Introduction

Outdoor And Indoor Conditions

Overview

Outdoor Conditions

Dry bulb (or air) temperature

Solar radiation

Long wave radiation

Relative humidity and (partial water) vapour pressure

Wind

Precipitation and wind driven rain

Standardized outside climate values

Indoor conditions

Dry bulb (or air) temperature

Relative humidity and (partial water) vapour pressure

Water vapour release indoors

Indoor climate classes

Indoor/outdoor air pressure differentials

Performance Metrics And Arrays

Definitions

Functional demands

Performance requirements

Some history

Performance arrays

Functionality

Structural adequacy

Building physics related quality

Fire safety

Durability

Maintenance

Costs

Functional Requirements And Performances At The Building Level

Thermal comfort

Physiological basis

Global steady state thermal comfort

Local discomfort

Transient conditions

Comfort related enclosure performance

Health and indoor environmental quality

Energy efficiency

Energy use in buildings

Space heating

Parameters defining the net energy demand for heating

Net energy demand for cooling

Gross energy demand, end energy use

Buildings ranked in terms of energy efficiency

Durability

Life cycle costs

Sustainability

Heat-Air-Moisture Performances At The Envelope Level

Air-tightness

Thermal transmittance

Transient thermal response

Moisture tolerance

Thermal bridges

Contact coefficient

Hygro-thermal stress and strain

Example of a performance control: timber framed walls

Heat-Air-Moisture Material Properties

Dry air and water

Building, insulating and finishing materials

References And Literature

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