[PDF] A Study Of The Performance Of Room Air Distribution Systems eBook

Author : H.B. Awbi
Publisher : Elsevier
Page : 746 pages
File Size : 29,3 MB
Release : 2000
Category : Science
ISBN : 9780080430171

GET BOOK

The air distribution in occupied spaces is a major issue of public concern. It is widely recognized that the quality of air and the nature of airflow can affect the health of occupants and the energy consumed in buildings and transport vehicles. ROOMVENT is the principal international conference in the field of air distribution. It was first initiated in 1987 by SCANVAC, the Scandinavian Federation of Heating, Ventilating and Sanitary Engineering Associations in Denmark, Finland, Iceland, Norway and Sweden. The aim of the Conference is to bring together researchers from universities and research institutes, engineers from industry and government officials and policy makers, with the goal of experiencing the latest techniques for measuring and analyzing indoor air flow, the visualization of indoor air flow patterns, the evaluation of ventilation parameters and the most recent developments in computer simulation techniques of room airflow. It is hoped that the theme of ROOMVENT 2000 "Ventilation for Health and Sustainable Environment" will set the scene for room air distribution research and development for the new millennium.

Author : Charles Nehme
Publisher : Independently Published
Page : 0 pages
File Size : 43,53 MB
Release : 2024-06-08
Category : Technology & Engineering
ISBN :

GET BOOK

The role of air distribution systems in modern buildings cannot be overstated. As the primary components responsible for delivering conditioned air into residential, commercial, and industrial spaces, air diffusers, registers, and grilles significantly impact indoor air quality, thermal comfort, and energy efficiency. This book is dedicated to exploring these crucial elements of HVAC systems, providing a comprehensive guide for engineers, architects, and HVAC professionals. Scope and Purpose The purpose of this book is to present a detailed analysis and understanding of air diffusers, registers, and grilles, covering their design, selection, installation, and maintenance. By delving into the technical aspects and practical applications, we aim to equip readers with the knowledge necessary to optimize air distribution in various environments. Residential Applications In residential settings, air diffusers, registers, and grilles play a vital role in creating comfortable living conditions. This book examines the unique requirements of residential HVAC systems, including considerations for noise control, aesthetic integration, and space constraints. Detailed case studies and best practice guidelines provide insights into achieving optimal air distribution in homes. Commercial Applications Commercial buildings present distinct challenges due to their diverse usage patterns and occupancy levels. This book addresses the complexities of designing air distribution systems for offices, retail spaces, educational institutions, and healthcare facilities. Emphasis is placed on achieving energy efficiency, indoor air quality, and compliance with building codes and standards. Industrial Applications Industrial environments often have demanding requirements for air distribution due to large spaces, high ceilings, and specific process needs. This book explores the design and implementation of air diffusers, registers, and grilles in manufacturing plants, warehouses, and other industrial facilities. Topics include durability, airflow management, and integration with specialized ventilation systems. Structure of the Book The book is organized into several key sections, each focusing on different aspects of air diffusers, registers, and grilles: Fundamentals of Air Distribution: An introduction to the principles of air movement and distribution, including airflow dynamics, pressure drop, and diffusion patterns. Types and Designs: A comprehensive overview of the various types of air diffusers, registers, and grilles, detailing their construction, materials, and performance characteristics. Selection Criteria: Guidelines for selecting the appropriate air distribution components based on factors such as room size, usage, thermal loads, and acoustic requirements. Installation Practices: Best practices for the proper installation of air diffusers, registers, and grilles to ensure efficient operation and ease of maintenance. Performance Testing and Maintenance: Methods for testing and maintaining air distribution systems to ensure they operate at peak efficiency and provide a healthy indoor environment. Case Studies: Real-world examples and case studies highlighting successful applications of air diffusers, registers, and grilles in residential, commercial, and industrial settings. Conclusion Whether you are a seasoned professional or a newcomer to the field of HVAC, this book aims to be a valuable resource, providing practical knowledge and guidance on air diffusers, registers, and grilles.

Author : Fred S. Bauman
Publisher : Bibliotheca Press
Page : 260 pages
File Size : 21,96 MB
Release : 2003
Category : Technology & Engineering
ISBN :

GET BOOK

This guide is ideal for HVAC design engineers, architects, building owners, facility managers, equipment manufacturers and installers, utility engineers, researchers, and other users of underfloor air distribution (UFAD) technology. UFAD systems are innovative methods for delivering space conditioning in offices and other commercial buildings. Improved Thermal Comfort, Improved Ventilation Efficiency and Indoor Air Quality, Reduced Energy Use and Reduced Life-Cycle Building Costs -- The guide explains these as some of the advantages that UFAD systems have over traditional overhead air distribution systems. This guide provides assistance in the design of UFAD systems that are energy efficient, intelligently operated, and effective in their performance. It also describes important research results that support current thinking on UFAD design and includes an extensive annotated bibliography for those seeking additional detailed information.

Author : G. E. Whittle
Publisher : Hyperion Books
Page : 24 pages
File Size : 48,59 MB
Release : 1986
Category : Heating
ISBN : 9780860221388

GET BOOK

Aimed at those involved in both the conceptual and the detailed design of room air distribution systems, this title provides a review of thermal comfort standards related to air distribution and of the literature concerning the application of air terminal devices in air conditioning systems. Sections include thermal comfort, comfort standards, air distribution principles, the performance of jets, grilles and diffusers, thermal environment - system design and evaluation, design data for normal applications, design evaluation for critical applications, and evaluation of installed systems.

Author : Essam E. Khalil
Publisher : CRC Press
Page : 264 pages
File Size : 22,45 MB
Release : 2013-11-22
Category : Science
ISBN : 1466594659

GET BOOK

Air Distribution in Buildings is a concise and practical guide to air distribution system design and managing air conditioning systems in buildings. Making use of 40 years of experience in the design of air conditioning and ventilations systems, and other electromechanical services, this structured reference for built environment engineering offers

Author : Setareh Janbakhsh
Publisher : Linköping University Electronic Press
Page : 96 pages
File Size : 18,3 MB
Release : 2015-04-27
Category :
ISBN : 917519063X

GET BOOK

This study presents air distribution systems that are based on confluent jets; this system can be of interest for the establishment of indoor environments, to fulfill the goals of indoor climate and energy-efficient usage. The main objective of this study is to provide deeper understanding of the flow field development of a supply device that is designed based on wall confluent jets and to investigate the ventilation performance by experimental and numerical methods. In this study, the supply device can be described as an array of round jets on a flat surface attached to a side wall. Multiple round jets that issue from supply device apertures are combined at a certain distance downstream from the device and behave as a united jet or so-called confluent jets. Multiple round jets that are generated from the supply device move downward and are attached to the wall at the primary region, due to the Coanda effect, and then they become wall confluent jets until the floor wall is reached. A wall jet in a secondary region is formed along the floor after the stagnation region. The characteristics of the flow field and the ventilation performance of conventional wall confluent jets and modified wall confluent jets supply devices are investigated experimentally in an office test room. The study of the modified wall confluent jets is intended to improve the efficiency of the conventional one while maintaining acceptable thermal comfort in an office environment. The results show that the modified wall confluent jets supply device can provide acceptable thermal comfort for the occupant with lower airflow rate compared to the conventional wall confluent jets supply device. Numerical predictions using three turbulence models (renormalization group (RNG k– ?), realizable (Re k– ?), and shear stress transport (SST k– ?) are evaluated by measurement results. The computational box and nozzle plate models are used to model the inlet boundary conditions of the nozzle device. In the isothermal study, the wall confluent jets in the primary region and the wall jet in the secondary region, when predicted by the three turbulence models, are in good agreement with the measurements. The non-isothermal validation studies show that the SST k– ? model is slightly better at predicting the wall confluent jets than the other two models. The SST k– ? model is used to investigate the effects of the nozzle diameter, number of nozzles, nozzle array configuration, and inlet discharge height on the ventilation performance of the proposed wall confluent jets supply device. The nozzle diameter and number of nozzles play important roles in determining the airflow pattern, temperature field, and draught distribution. Increased temperature stratification and less draught distribution are achieved by increasing the nozzle diameter and number of nozzles. The supply device with smaller nozzle diameters and fewer nozzles yields rather uniform temperature distribution due to the dominant effect of mixing. The flow behavior is nearly independent of the inlet discharge height for the studied range. The proposed wall confluent jets supply device is compared with a mixing supply device, impinging supply device and displacement supply device. The results show that the proposed wall confluent jets supply device has the combined behavior of both mixing and stratification principles. The proposed wall confluent jets supply device provides better overall ventilation performance than the mixing and displacement supply devices used in this study. This study covers also another application of confluent jets that is based on impinging technology. The supply device under consideration has an array of round jets on a curve. Multiple jets issue from the supply device aperture, in which the supply device is positioned vertically and the jets are directed against a target wall. The flow behavior and ventilation performance of the impinging confluent jets supply device is studied experimentally in an industrial premise. The results show that the impinging confluent jets supply device maintains acceptable thermal comfort in the occupied zone by creating well-distributed airflow during cold and hot seasons.

Author : Y. Chartier
Publisher : World Health Organization
Page : 132 pages
File Size : 46,77 MB
Release : 2009
Category : Medical
ISBN : 9241547855

GET BOOK

This guideline defines ventilation and then natural ventilation. It explores the design requirements for natural ventilation in the context of infection control, describing the basic principles of design, construction, operation and maintenance for an effective natural ventilation system to control infection in health-care settings.