The Flow in an Under-floor Plenum PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download The Flow in an Under-floor Plenum PDF full book. Access full book title The Flow in an Under-floor Plenum by Jun Myoung Choi. Download full books in PDF and EPUB format.
Author: Jun Myoung Choi
Publisher:
ISBN:
Category :
Languages : en
Pages : 69
Get Book Here
Book Description
There is considerable growth in popularity of under-floor air distribution (UFAD) systems because of potential energy savings, an improvement in air quality, and thermal comfort over conventional systems. With these advantages, the UFAD system could be an alternative air distribution system potentially superior to traditional overhead system; however, well-developed design methodologies especially for under-floor plenum have not been fully explored. We have considered two issues that lower the performance of under-floor plenum in UFAD system. One is the temperature difference between diffusers results in discomfort for occupants, and the other is the heat transfer across a slab lowers energy efficiency in UFAD system. The Particle Tracking Velocimetry (PTV) experiment was conducted to demonstrate the flow pattern in the plenum, and the computational calculation by commercial FLUENT software was performed to show the flow patterns and physical properties of the flow. In this thesis, the plenum of good performance is defined as the plenum that has lower temperature variation from diffuser to diffuser and lower heat transfer rate across a slab. The objectives of this thesis are to investigate the physical properties of flow in a plenum, and give ideas for reducing temperature variation of air leaving diffusers and heat transfer across a slab.
Author: Jun Myoung Choi
Publisher:
ISBN:
Category :
Languages : en
Pages : 69
Get Book Here
Book Description
There is considerable growth in popularity of under-floor air distribution (UFAD) systems because of potential energy savings, an improvement in air quality, and thermal comfort over conventional systems. With these advantages, the UFAD system could be an alternative air distribution system potentially superior to traditional overhead system; however, well-developed design methodologies especially for under-floor plenum have not been fully explored. We have considered two issues that lower the performance of under-floor plenum in UFAD system. One is the temperature difference between diffusers results in discomfort for occupants, and the other is the heat transfer across a slab lowers energy efficiency in UFAD system. The Particle Tracking Velocimetry (PTV) experiment was conducted to demonstrate the flow pattern in the plenum, and the computational calculation by commercial FLUENT software was performed to show the flow patterns and physical properties of the flow. In this thesis, the plenum of good performance is defined as the plenum that has lower temperature variation from diffuser to diffuser and lower heat transfer rate across a slab. The objectives of this thesis are to investigate the physical properties of flow in a plenum, and give ideas for reducing temperature variation of air leaving diffusers and heat transfer across a slab.
Author: Fred S. Bauman
Publisher: Bibliotheca Press
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 260
Get Book Here
Book Description
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: Arun K. Saha
Publisher: Springer
ISBN: 8132227433
Category : Technology & Engineering
Languages : en
Pages : 1638
Get Book Here
Book Description
This volume comprises the proceedings of the 42nd National and 5th International Conference on Fluid Mechanics and Fluid Power held at IIT Kanpur in December, 2014.The conference proceedings encapsulate the best deliberations held during the conference. The diversity of participation in the conference, from academia, industry and research laboratories reflects in the articles appearing in the volume. This contributed volume has articles from authors who have participated in the conference on thematic areas such as Fundamental Issues and Perspectives in Fluid Mechanics; Measurement Techniques and Instrumentation; Computational Fluid Dynamics; Instability, Transition and Turbulence; Turbomachinery; Multiphase Flows; Fluid‐Structure Interaction and Flow‐Induced Noise; Microfluidics; Bio‐inspired Fluid Mechanics; Internal Combustion Engines and Gas Turbines; and Specialized Topics. The contents of this volume will prove useful to researchers from industry and academia alike.
Author: Charles Nehme
Publisher: Charles Nehme
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 76
Get Book Here
Book Description
The growing demand for energy-efficient, sustainable, and flexible building systems has reshaped how we design and operate modern workspaces. As a crucial component of contemporary HVAC systems, Underfloor Air Distribution (UFAD) technology offers an innovative approach to air delivery that can significantly enhance both occupant comfort and energy efficiency. This book aims to provide a comprehensive guide for engineers, architects, facility managers, and professionals involved in the design, installation, and operation of UFAD systems. Over the past few decades, the evolution of building technologies has prompted a shift away from traditional overhead air distribution systems. UFAD systems, with their ability to deliver conditioned air directly from the floor, are proving to be particularly effective in open-plan offices, data centers, and spaces requiring adaptive layouts. However, as with any system, the success of a UFAD system hinges on a thorough understanding of its design principles, proper installation, and ongoing maintenance. This book was born out of the need for a clear, structured resource that can guide professionals through the complexities of UFAD—from the fundamental science behind air distribution to the nuances of real-world system implementation. Each chapter builds upon the last, starting with an introduction to UFAD and gradually delving into more detailed aspects like airflow dynamics, commissioning, and sustainability. While UFAD offers numerous benefits, such as increased energy efficiency, improved thermal comfort, and design flexibility, these advantages are realized only when the system is designed and maintained with precision. Throughout this book, we will explore not only the technical aspects of UFAD systems but also practical insights and lessons learned from successful projects. I hope that this book serves as a valuable resource for professionals at all levels—whether you are considering UFAD for a new construction project or seeking ways to optimize an existing system. By understanding both the opportunities and challenges that UFAD presents, you can leverage this technology to create more comfortable, energy-efficient, and adaptable environments. Thank you for embarking on this journey into the world of UFAD. I am confident that, together, we can push the boundaries of what is possible in building design and air distribution.
Author: Tom Jones
Publisher:
ISBN: 9780860227533
Category : Buildings
Languages : en
Pages : 0
Get Book Here
Book Description
A floor plenum is a void between a building's floor structure and a raised access floor, used for distributing conditioned air to the spaces above. It is important that conditioned air in a floor plenum flows into the occupied zone and does not leak into cavities, risers, stairwells, heating trenches or other adjacent zones. A properly sealed floor plenum will allow the diffusers and grilles to fulfil their primary role of delivering air at the correct flow rate. The airtightness of floor plenums can be a serious energy efficiency issue. This BSRIA guide addresses these issues and places upper limits on the air leakage of floor plenums. There are two components to this leakage: plenum leakage and raised access floor leakage. A testing methodology for both plenum leakage and raised access floor leakage is given, and guidance on achieving both is provided.
Author: Yogendra Joshi
Publisher: Springer Science & Business Media
ISBN: 1441971246
Category : Science
Languages : en
Pages : 635
Get Book Here
Book Description
Energy Efficient Thermal Management of Data Centers examines energy flow in today's data centers. Particular focus is given to the state-of-the-art thermal management and thermal design approaches now being implemented across the multiple length scales involved. The impact of future trends in information technology hardware, and emerging software paradigms such as cloud computing and virtualization, on thermal management are also addressed. The book explores computational and experimental characterization approaches for determining temperature and air flow patterns within data centers. Thermodynamic analyses using the second law to improve energy efficiency are introduced and used in proposing improvements in cooling methodologies. Reduced-order modeling and robust multi-objective design of next generation data centers are discussed.
Author: Raj, Pethuru
Publisher: IGI Global
ISBN: 1466658657
Category : Computers
Languages : en
Pages : 592
Get Book Here
Book Description
Clouds are being positioned as the next-generation consolidated, centralized, yet federated IT infrastructure for hosting all kinds of IT platforms and for deploying, maintaining, and managing a wider variety of personal, as well as professional applications and services. Handbook of Research on Cloud Infrastructures for Big Data Analytics focuses exclusively on the topic of cloud-sponsored big data analytics for creating flexible and futuristic organizations. This book helps researchers and practitioners, as well as business entrepreneurs, to make informed decisions and consider appropriate action to simplify and streamline the arduous journey towards smarter enterprises.
Author: John Lamb
Publisher: Pearson Education
ISBN: 0135093880
Category : Business & Economics
Languages : en
Pages : 356
Get Book Here
Book Description
Ho> For CEOs, CIOs, CFOs, and IT leaders: The green IT business case and best practices for making it happen Timely help for companies facing rising energy costs, new government rules, and growing public concern Powerful new insights from IBM’s breakthrough $1 billion green computing initiative Chances are your enterprise IT organization has a significant carbon footprint. In an era of unpredictable energy costs, reducing energy usage throughout your data centers and IT infrastructure represents a powerful cost-cutting opportunity. Now, a top green IT expert shows business and IT leaders how to drive powerful business value by improving IT’s environmental performance. Drawing on leading-edge experience, John Lamb helps you realistically assess the business case for green IT, set priorities, and overcome the internal and external challenges to making it work. He offers proven solutions for issues ranging from organizational obstacles to executive motivation and discusses crucial issues ranging from utility rate incentives to metrics. Along the way, you’ll discover energy-saving opportunities–from virtualization and consolidation to cloud and grid computing–and solutions that will improve business flexibility as they reduce environmental impact. Lamb presents case studies, checklists, and more–all the practical guidance you need to drive maximum bottom-line value from your green IT initiative.
Author: B. Purushothama
Publisher: CRC Press
ISBN: 1040005721
Category : Technology & Engineering
Languages : en
Pages : 827
Get Book Here
Book Description
This book is a comprehensive guide for professionals in the textile industry. It delves into the intricate balance of moisture and air control that shapes textile production. From enhancing quality to optimizing efficiency, this book is an indispensable resource for the industry professionals.
Author: K.L. Mittal
Publisher: Springer Science & Business Media
ISBN: 1489911871
Category : Science
Languages : en
Pages : 289
Get Book Here
Book Description
This book documents the proceedings of the Third Symposium on Particles in Gases and Liquids: Detection, Characterization and Control held as a part of the 22nd Annual Meeting of the Fine Particle Society in San Jose, California, July 29-August 2, 1991. This series of symposia was initiated in 1987 in light of the growing importance to eliminate particles from process gases and liquids. As pointed out in the Preface to antecedent volumes in this series that particles in process gases and liquids could cause significant yield losses in precision manufacturing and concomitantly there has been heightened interest in understanding the behavior of particles in gases and liquids and devising ways to eliminate, or at least reduce substantially, these particles. The concern about particles in gases and liquids has been there for qui.te some time in the microelectronics arena, but there are other areas also where particles are of significant concern, e.g. in operation theatres in hospitals, food and beverage industry, and pharmaceutical manufacturing. This symposium basically had the same objectives as its predecessors, but to provide an update on the R&D activity taking place in the arena of particle detection, characterization and control. The printed program comprised a total of 28 papers dealing with variegated aspects of particles in gases and liquids. There were brisk and lively discussions and the attendees offered many positive comments, which goes to show that it was a well-received and needed symposium.
