Design, Operation and Maintenance of HVAC Systems
les 23, 24, 25, 26 et 27 novembre 2020
Code : 1126-ONL20
This course covers the design, operation, maintenance and troubleshooting of a wide range of HVAC systems. Because understanding Psychrometry is a prerequisite to appreciating and understanding the operation of HVAC systems.
This course starts with a quick review of Psychrometry and representation and air conditioning processes on the Psychrometric chart. This is followed by: a detailed discussion of the basic subsystems of any HVAC system, a comprehensive coverage of various single-zone and multiple-zone systems, and a clear set of guidelines of selecting the most suitable HVAC system for various residential, commercial and industrial applications.
Finally, a discussion of the operation and maintenance of various subsystems and components is presented, followed by an outline of the measurements and instrumentation used in troubleshooting of HVAC systems.
The material presented here is for individuals who have little background on the subject; while providing valuable information for personnel having experience with HVAC systems.
- To provide a thorough understanding of the design, operation, and maintenance of various HVAC systems.
- To provide guidelines for the selection of the most appropriate HVAC system for various applications.
- To provide information on maintenance and trouble shooting of various components and subsystems.
Who Should Attend
- Design and project engineers and technologists,
- Plant and facility managers/engineers,
- Mechanical engineers and technologists,
- Maintenance and operation personnel,
- Other technical personnel who need to upgrade/refresh their current knowledge of operation and maintenance of various types of HVAC systems,
- Professionals with basic knowledge in the construction field and wishing to gain knowledge to be able to join the field of HVAC including:
- Building inspectors
- Site Foremen
- Representatives of suppliers or equipment manufacturers
- Engineering Students
10:00 am to 5:00 pm Eastern (Will include the usual breaks)
Horaire : 10:00 AM - 5:00 PM EDT
voir le programme complet
- The meaning of Air Conditioning
- Comfort conditions
- Codes and standards
- Rules of Thumb (cooling/heating load)
- Moist-air properties
- The Psychrometric chart
Psychrometry - Continue
- Moist air processes
- Typical A/C cooling and heating cycles
- Steps to Size an HVAC System
- Determination of condition and amount of supply air
- Design Case Studies
Basic Subsystems of any HVAC System
- Air subsystem
- Chilled/hot-water subsystem
- Refrigeration subsystem
- Heat-rejection subsystem
- Control subsystem
Types of HVAC Systems - Single-zone systems
- Packaged terminal air conditioner
- Packaged DX rooftop unit
- Split DX system
- Chilled-water terminal system
- Dedicated outdoor-air system
- Water-source heat pump
- Ground-source heat-pump
- Variable-air-volume (VAV) system
Types of HVAC Systems - Multiple-zone systems
- Multi-zone air handing unit (AHU)
- Changeover-bypass system
- DX rooftop variable-air-volume (VAV) system
- Packaged self-contained VAV system
- Central chilled-water VAV system
- Two-fan, dual-duct VAV system
- Dual-duct VAV system
Selection of HVAC Systems for Various Applications
- Factors that affect selection of HVAC system
- Selection map of HVAC systems for:
- Single-purpose occupancies (e.g., residential, restaurants, shops, clubs, theaters, etc.)
- Multi-purpose occupancies (e.g., offices, hotels, moles, museums, libraries, department stores, labs, etc.)
HVAC Equipment Selection and Rating Tables
- Packaged DX units
- Air Handling Units (AHU)
- Air-cooled water chillers
- Water-cooled water chillers
WORKSHOP: Participants will design an HVAC System for a building under the instructor guidance.
Operation and Maintenance of Air Subsystem Components
- Functions and types of fans
- Fan selection
- Fan noise - estimated fan sound power level
- Eliminating fan-noise problems
- Periodic inspection
- Fan troubles and the possible causes
- Types of coils
- Coil accessories
- Condensate control
- Freeze-up protection
- Tightness and cleaning
Air Cleaning Equipment
- Classification of air filters
- Electronic air cleaners
- Activated carbon adsorbers
- Selection of air filters
- Air leakage
- Fire protection
- Duct liner and duct cleaning
- Sound attenuation in ducts
Operation and Maintenance to Guarantee Indoor Air Quality (IAQ)
- Inspection, service, and access
- Monitoring of operating conditions in air systems
- Coils and ductwork
- Space pressurization control
- Minimum Ventilation Control
- CO2-based demand-controlled ventilation
Operation and Maintenance of Refrigeration Subsystem Components
- Main problems in direct-expansion reciprocating systems
- Parameters that influence the performance of Shell-and-Tube water–cooled condensers
- Air-cooled condensers: clearance, warm air recirculation, dirt clogging, and low-ambient air control.
- Factors that affect cooling tower performance
- Operating considerations for cooling towers
- Maintenance of cooling towers
Troubleshooting of HVAC Systems
- Required Measurements and Instrumentation
- Troubleshooting Case Studies
Dr. Mohamed S. Hamed, PhD, P.Eng
Mohamed is a Full Professor at the Department of Mechanical Engineering and the founding director of the Thermal Processing Laboratory (TPL) at McMaster University. & has more than 35 years of industrial experience in the field of thermal engineering. Dr. Hamed has developed and presented numerous training courses and seminars in the field of HVAC and Refrigeration Systems, Renewable Energy Systems, Energy Conservation and Management, Boiling Heat Transfer, and Two-phase Flows. He has served as a consultant in many projects in Canada and abroad.
Dr. Hamed is a registered Professional Engineer in the Province of Ontario and a member of various professional associations such as ASHRAE, ASM International, TMS, CSME, CFD Society of Canada, ASME, and a senior member of SME. He is also an editorial board member of the Transactions of the CSME, the International Journal of Microstructure and Materials Properties (IJMMP), and the International Journal of Computational Thermal Sciences.
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