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HVAC Guide to Air Handling System Design

HVAC Guide to Air Handling System Design
Author: A. Bhatia
Publisher: CreateSpace
Total Pages: 128
Release: 2014-11-01
Genre: Air conditioning
ISBN: 9781503252547
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The term Air Handling System' refers to the equipment where air is conditioned to an acceptable level for distribution within the building. An air handling unit often abbreviated as AHU is a very important component of central-air-conditioning system. It is responsible for drawing return air from the indoor spaces, mixing it with outdoor air, conditioning it to the acceptable level for distribution within the building. The modular packaged equipment offered by various manufacturers is pretty standard. HVAC designers can simply spec the performance requirements and pick and choose from a wide array of standard building blocks to assemble a unit that meets their specific project needs. But large majority of air handlers are custom built or tailor made demanding HVAC designer to apply fundament psychrometrics processes to precisely estimate the capacity and airflow requirements, select the fan, coil and other auxiliaries and integrate these properly to the building control system. This 6-hr Quick Book outlines the key design considerations for sizing, selecting and estimating the capacity and airflow rate of air handling systems.At the conclusion of this quick book, the reader will be able to answer: * What is function of Air handling unit and what factors affect its sizing?* How are air-conditioning processes depicted on the psychrometric chart?* What is difference between room sensible and grand sensible heat factor?* How is airflow rate and the cooling coil load determined?* What are the five basic AHU arrangements?* What are the different types and applications of the fans used in air handling applications?* What are the different types of cooling and heating coils?* What are the different types and applications of the filters used in air handling applications?* What are the different types of humidifiers and dehumidifiers?* What are the different types of control valves and their application?* How are the air handling unit controlled and the sequence of operation for critical facility?* What are the energy conservation features in designing air handling systems?

Air Handling Units

Air Handling Units
Author: Charles Nehme
Publisher: Independently Published
Total Pages: 0
Release: 2023-05-22
Genre:
ISBN:
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Welcome to the world of air handling units! In this book, we delve into the fascinating realm of air handling units (AHUs) and explore their vital role in maintaining indoor air quality and ensuring comfort in various environments. AHUs have become an indispensable component of heating, ventilation, and air conditioning (HVAC) systems in residential, commercial, and industrial settings. These units are responsible for the filtration, conditioning, and distribution of air, playing a crucial role in creating a healthy and pleasant atmosphere for occupants. The purpose of this book is to provide a comprehensive overview of air handling units, their components, functions, and the principles behind their operation. Whether you are a seasoned HVAC professional, a student studying mechanical engineering, or simply an enthusiast seeking to expand your knowledge, this book aims to serve as a valuable resource. We will begin our journey by exploring the fundamental concepts of air handling and ventilation, establishing a solid foundation for understanding the significance of AHUs. We will then delve into the inner workings of these units, examining the various components that make up an AHU and their respective roles. Throughout this book, we will cover topics such as air filtration, heating and cooling mechanisms, humidity control, energy efficiency, and control systems. We will also address the importance of maintenance and regular servicing to ensure optimal performance and longevity of AHUs. Moreover, we will discuss different types of air handling units, including packaged AHUs, rooftop units, and custom-built systems, highlighting their unique characteristics and applications. Real-world examples and case studies will be incorporated to provide practical insights and illustrate the diverse uses of AHUs across industries. It is my hope that this book will not only enhance your understanding of air handling units but also inspire you to appreciate the critical role they play in creating healthy and comfortable indoor environments. By delving into the complexities and intricacies of AHUs, we can unlock new possibilities in HVAC design, implementation, and innovation. So, let us embark on this journey together, exploring the world of air handling units and uncovering the secrets behind their efficient and effective operation. May this book serve as a guide, shedding light on the marvels of AHUs and empowering you to make informed decisions when it comes to air handling and ventilation. Enjoy the exploration! Charles Nehme

Air Handling System Design

Air Handling System Design
Author: Tseng-Yao Sun
Publisher: McGraw-Hill Professional Publishing
Total Pages: 0
Release: 1994
Genre: Air conditioning
ISBN: 9780070625716
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Focuses exclusively on central air handling systems, providing detailed practical information on some 25 constant volume, variable volume, and hybrid systems. Gives guidance on critical differences, basic heating and cooling loads and load variations, psychometrics in system design and selection, and energy conservation and system retrofitting. No references. Annotation copyright by Book News, Inc., Portland, OR

Control Systems for Heating, Ventilating, and Air Conditioning

Control Systems for Heating, Ventilating, and Air Conditioning
Author: Roger W. Haines
Publisher: Springer Science & Business Media
Total Pages: 376
Release: 2006-06-01
Genre: Technology & Engineering
ISBN: 0387306331
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Control Systems for Heating, Ventilating and Air Conditioning, Sixth Edition is complete and covers both hardware control systems and modern control technology. The material is presented without bias and without prejudice toward particular hardware or software. Readers with an engineering degree will be reminded of the psychrometric processes associated with heating and air conditioning as they learn of the various controls schemes used in the variety of heating and air conditioning system types they will encountered in the field. Maintenance technicians will also find the book useful because it describes various control hardware and control strategies that were used in the past and are prevalent in most existing heating and air conditioning systems. Designers of new systems will find the fundamentals described in this book to be a useful starting point, and they will also benefit from descriptions of new digital technologies and energy management systems. This technology is found in modern building HVAC system designs.

Air Handling Units

Air Handling Units
Author: Charles Nehme
Publisher: Independently Published
Total Pages: 0
Release: 2024-05-24
Genre: Technology & Engineering
ISBN:
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Introduction to Air Handling Units (AHUs) An Air Handling Unit (AHU) is a critical component in heating, ventilation, and air conditioning (HVAC) systems. These units are used to regulate and circulate air as part of a heating, ventilating, and air-conditioning system. Components of an AHU Blower/Fan: Moves air through the AHU and ductwork. Heating/Cooling Coils: Heat exchangers that transfer heat to or from the air passing through them. Filters: Remove particles and contaminants from the air. Humidifiers/Dehumidifiers: Control the humidity level in the air. Mixing Box: Combines return air with fresh air. Dampers: Control the flow of air within the system. Control Systems: Include sensors, thermostats, and controllers to regulate temperature, humidity, and airflow. Types of AHUs Draw-Through AHUs: The fan is located after the air-handling components (such as coils and filters), drawing air through them. Blow-Through AHUs: The fan is located before the air-handling components, blowing air through them. Functionality Ventilation: AHUs bring in fresh air from outside and expel stale air from inside, ensuring indoor air quality. Temperature Control: By heating or cooling the air, AHUs maintain desired indoor temperatures. Humidity Control: Adding or removing moisture from the air to maintain comfortable humidity levels. Air Filtration: Removing dust, pollen, and other airborne particles to improve air quality. Applications Commercial Buildings: Offices, shopping malls, hospitals, and schools where maintaining a comfortable and healthy indoor environment is crucial. Industrial Settings: Factories and laboratories that require precise environmental control to ensure product quality and safety. Residential Buildings: High-end homes and apartment complexes that need advanced climate control and air quality management. Benefits Energy Efficiency: Modern AHUs are designed to be energy-efficient, reducing operational costs. Comfort: Maintain consistent and comfortable indoor environments. Health: Improve indoor air quality by filtering pollutants and controlling humidity, which can reduce the prevalence of mold and allergens. Flexibility: Can be customized to meet the specific requirements of different buildings and applications. Maintenance Regular maintenance is essential for the efficient operation of AHUs. This includes: Filter Replacement: To ensure air quality and system efficiency. Coil Cleaning: To maintain heat exchange efficiency. Fan Maintenance: To prevent mechanical failures and ensure proper airflow. Checking Control Systems: To ensure they are operating correctly and responding to environmental changes. Conclusion Air Handling Units are vital for creating and maintaining comfortable, healthy, and efficient indoor environments in a variety of settings. Understanding their components, functionality, and maintenance requirements can help optimize their performance and extend their lifespan.

Model-Based Fault Diagnosis Techniques

Model-Based Fault Diagnosis Techniques
Author: Steven X. Ding
Publisher: Springer Science & Business Media
Total Pages: 533
Release: 2012-12-20
Genre: Technology & Engineering
ISBN: 1447147995
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Guaranteeing a high system performance over a wide operating range is an important issue surrounding the design of automatic control systems with successively increasing complexity. As a key technology in the search for a solution, advanced fault detection and identification (FDI) is receiving considerable attention. This book introduces basic model-based FDI schemes, advanced analysis and design algorithms, and mathematical and control-theoretic tools. This second edition of Model-Based Fault Diagnosis Techniques contains: • new material on fault isolation and identification and alarm management; • extended and revised treatment of systematic threshold determination for systems with both deterministic unknown inputs and stochastic noises; • addition of the continuously-stirred tank heater as a representative process-industrial benchmark; and • enhanced discussion of residual evaluation which now deals with stochastic processes. Model-based Fault Diagnosis Techniques will interest academic researchers working in fault identification and diagnosis and as a text it is suitable for graduate students in a formal university-based course or as a self-study aid for practising engineers working with automatic control or mechatronic systems from backgrounds as diverse as chemical process and power engineering.

Handbook of Air Conditioning and Refrigeration

Handbook of Air Conditioning and Refrigeration
Author: Shan K. Wang
Publisher: McGraw Hill Professional
Total Pages: 1430
Release: 2000-11-07
Genre: Technology & Engineering
ISBN:
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* A broad range of disciplines--energy conservation and air quality issues, construction and design, and the manufacture of temperature-sensitive products and materials--is covered in this comprehensive handbook * Provide essential, up-to-date HVAC data, codes, standards, and guidelines, all conveniently located in one volume * A definitive reference source on the design, selection and operation of A/C and refrigeration systems

Variable Air Volume Systems

Variable Air Volume Systems
Author: Leo A. Meyer
Publisher: HVAC Books—Best on the Web
Total Pages: 96
Release: 1998
Genre: House & Home
ISBN: 9780880690218
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