This open access book systematically summarizes the current research progress of attachment ventilation, covering vertical wall attachment, column attachment, and adaptive attachment ventilation. Attachment ventilation is a high-performance ventilation mode that was first proposed by the author, Prof. Angui Li 20 years ago. Now it has been widely used in office spaces, subway stations, high-speed railway stations, international airport terminals, and other large spaces. This book introduces attachment ventilation in detail to eliminate the cooling/heating load of the occupied zone and provide an expected environment for the air-conditioned zone. Attachment ventilation combines the advantages of traditional mixed ventilation and displacement ventilation. This book consists of six chapters, covering a series of airflow patterns, mechanisms, parameter correlations, and attachment ventilation design methods. It is helpful for HVAC engineers to design attachment ventilation effectively.
Author(s): Angui Li
Publisher: Springer
Year: 2023
Language: English
Pages: 203
City: Singapore
Foreword by Risto Kosonen
Foreword by Thomas Olofsson
Foreword by Mats Sandberg
Preface
Contents
Nomenclature
1 Air Distribution and Indoor Environment Evaluation
1.1 Ventilation and Air Distribution
1.2 Objective Evaluation of the Indoor Air Environment
References
2 Air Movement and Airflow Patterns of Attachment Ventilation
2.1 Coanda Effect and Ventilation
2.1.1 Coanda Effect
2.1.2 Extended Coanda Effect and Air Movement
2.2 Vertical Wall-Attached Jet and Airflow Pattern
2.3 Column Attachment Ventilation Airflow Pattern
2.4 Comparison of the Attachment, Mixing and Displacement Ventilation
References
3 Isothermal Attachment Ventilation Mechanisms
3.1 Wall-Attached Jet Parameters
3.2 Jet Impinging Region
3.3 Isothermal Vertical Wall Attachment Ventilation Parameter Correlations
3.3.1 Centerline Velocity in Vertical Attachment Region
3.3.2 Centerline Velocity in Horizontal Air Reservoir Region
3.3.3 Cross-Sectional Velocity Profile
3.3.4 Characteristic Thickness of a Wall-Attached Jet
3.3.5 Cross-Sectional Flow Rate
3.4 Airflow of Column Attachment Ventilation
3.4.1 Rectangular Column-Attached Jet
3.4.2 Circular Column-Attached Jet
3.5 Velocity Distributions with Different Attachment Ventilation Modes
3.5.1 Comparison of Centerline Velocity in Vertical Attachment Region
3.5.2 Comparison of Centerline Velocity in Horizontal Air Reservoir Region
References
4 Nonisothermal Attachment Ventilation Mechanisms
4.1 Nonisothermal Vertical Wall Attachment Ventilation
4.2 Nonisothermal Column Attachment Ventilation
4.3 Characteristic Parameter Correlations of Nonisothermal Attachment Ventilation
4.3.1 Vertical Attachment Region
4.3.2 Horizontal Air Reservoir Region
4.4 Air Opening and Control Zone in Rooms
4.4.1 Influence of Air Opening Types
4.4.2 Control Zone and Column Spacing
4.4.3 Airflow at the Exhaust Outlet
4.5 Effect of Heat Sources on Indoor Airflow
4.5.1 Evenly Distributed Heat Sources on the Floor
4.5.2 Concentrated Plane Heat Sources
4.5.3 Volumetric Heat Sources
4.6 Human Movement Effect on Airflow Field of Attachment Ventilation
4.7 Effect of Wall Temperature
4.8 Effect of Wall Roughness
References
5 Adaptive Attachment Ventilation with Deflectors
5.1 Adaptive Attachment Ventilation for Breathing Zone
5.1.1 Deflector Forms
5.1.2 Installation Height of Deflectors
5.1.3 Deflector Application
5.2 Curved Surface Attachment Ventilation
5.2.1 Isothermal Curved Surface Attachment Ventilation
5.2.2 Nonisothermal Curved Surface Attachment Ventilation
5.3 Some Applications of Attachment Ventilation
5.3.1 Tiny Interior Spaces
5.3.2 Some Applications to Particular Spaces
References
6 Design Methods of Attachment Ventilation Systems
6.1 Scope of Application of Attachment Ventilation Systems
6.1.1 Distinguishing Features of Attachment Ventilation Systems
6.1.2 Occupied Zone
6.1.3 Airflow Parameters and Diffusers in the Occupied Zone
6.2 Attachment Ventilation Design Procedure
6.3 Adaptive Attachment Ventilation Design Procedure
6.4 Comparison of Design Methods of Attachment, Mixing and Displacement Ventilation
6.5 Case Study and Design of Attachment Ventilation Systems
6.5.1 Office Room
6.5.2 Exhibition Hall
6.5.3 Subway Station
6.5.4 Waiting Hall of High-Speed Railway Station
References
