F25 -- Heat, Air, and Moisture Control in Building Assemblies--Fundamentals (SI)

Proper design of space heating, cooling, and air-conditioningsystems requires detailed knowledge of the building envelope’s overall heat,air, and moisture performance. This chapter discusses the fundamentals ofcombined heat, air, and moisture movement as it relates to the analysis anddesign of envelope assemblies. Guidance for designing mechanical systems isfound in other chapters of the ASHRAE Handbook.

FUNDAMENTALS
Terminology and Symbols
Hygrothermal Loads andDriving Forces
HEAT TRANSFER
Steady-State ThermalResponse
Transient Thermal Response
AIRFLOW
MOISTURE TRANSFER
Moisture Storage inBuilding Materials
Moisture Flow Mechanisms
COMBINED HEAT, AIR, ANDMOISTURE TRANSFER
SIMPLIFIED HYGROTHERMALDESIGN CALCULATIONS AND ANALYSES
Surface Humidity andCondensation
Interstitial Condensationand Drying
TRANSIENT COMPUTATIONALANALYSIS
Criteria to EvaluateHygrothermal Simulation Results

No. of Pages: 18