09气流组织si_f09_ch20.pdf

Related Commercial Resources CHAPTER 20 SPACE AIR DIFFUSION Indoor Air Quality and Sustainability 20.1 Mixed-Air Systems 20.7 Applicable Standards and Codes 20.2 Fully Stratified Systems 20.14 Terminology 20.2 Partially Mixed Systems 20.17 Principles of Jet Behavior 20.3 Task/Ambient Conditioning (TAC) 20.19 SYSTEM DESIGN 20.7 Symbols 20.20 OOM air distribution systems are intended to provide thermal the characteristics of the room supply airflow and heat load config- R comfort and ventilation for space occupants and processes. uration. Although air terminals (inlets and outlets), terminal units, local For room supply airflow, the major factors are ducts, and rooms themselves may affect room air diffusion, this • Total room supply airflow quantity chapter addresses only air terminals and their direct effect on occu- • Room supply air temperature pant comfort. This chapter is intended to present HVAC designers • Diffuser type the fundamental characteristics of air distribution devices. For infor- • Diffuser throw height (or outlet velocity); this is associated with mation on naturally ventilated spaces, see Chapter 16. For a discus- the amount of mixing provided by a floor