Systems Fundamentals and Heating, Ventilation and Air-Conditioning (HVAC) Systems

Introduction

This course will provide the participants with the knowledge necessary to understand and enhance their mechanical aptitude in the area of Heating Ventilation and Air Conditioning (HVAC) maintenance and operation.

The purpose of this course will be to develop a working knowledge of the various types of rotating and reciprocating equipment used in HVAC systems, as well as the different procedures and regulations associated with the operation and installation of this equipment.  Upon completion of this course, the participants will be equipped with the basic knowledge required to install and repair HVAC equipment and their related systems.

Technicians will be required to have a technical comprehension of HVAC equipment.  The technicians that participate in this course will be better equipped to repair and maintain, as well as install and commission HVAC equipment and their associated systems within their responsibilities.  They will also be able to increase the knowledge within the maintenance team, thereby increasing the safe and efficient productivity of the mechanical systems.  With further on-job training and experience, the technicians will be able to attend more advanced training and therefore enhance the maintenance team’s capabilities and knowledge. 

Objectives

• To provide a practical understanding of the theory dictating the design and control of HVAC systems
• To provide information on the energy conservation aspects of HVAC systems
• The aim of this program is to provide the participants with a complete and up-to-date overview of the area of Heating, Ventilation and Air-conditioning (HVAC). It commences with a review of psychometric charts and then examines the factors that influence design choices, indoor air quality, load calculations and heating/ventilation and air-conditioning systems. Numerous tips and tricks throughout the program make it very practical and topical to your applications. Upon the successful completion of this program, the participant will be able to:
• Understand and apply the psychometric chart
• Design for good air quality
• Perform basic load calculations
• Minimize forced outages and prevent serious damage to HVAC Equipment
• Provide an overview of the legislative requirements plus the essential steps and responsibilities for the maintenance and repair of HVAC Systems
• Outline the technologies available for efficient energy management using HVAC systems

Training Methodology

This is a highly interactive training course with opportunities to advance your opinions and ideas. Participation is encouraged in a supportive environment. To ensure the concepts introduced during the program are understood, they will be reinforced through a mix of learning methods, including lecture-style presentation, open discussion, case studies, simulations and group work.

Who Should Attend?

Design and project engineers and technologists, plant and facility engineers, consultants, mechanical engineers and technologists and operation personnel and other technical personnel who need to upgrade/refresh their current knowledge of HVAC systems.

• Plant engineers
• Inspection and repair managers, supervisors and engineers
• Mechanical engineers and technicians
• Design engineers, electrical engineers and technicians, consulting engineers

Course Outline

• Fundamentals of HVAC:
  • Refrigeration cycle
  • Type of systems
  • Type of Refrigerants
  • Type of compressors
  • Type of Fans such as backward fans, forwards fans and centrifugal fans.
• Determination of Moist Air Properties and the Use of
• Psychometrics Chart
  • Moist air properties
  • The psychometric chart
  • Moist air processes
• Calculations of Air Conditioning Cycles (Systems)
  • Bypassed, return and outdoor air
  • Capacity of refrigerating plant
  • Effect of heat gains in ductwork
• Determination of Space Conditions – Comfort Zone
  • Comfort-physiological considerations
  • Environmental comfort indices
  • Comfort conditions
• Cooling/Heating Load Calculations
  • Design temperature differences
  • Quantity of heat to be removed
  • Conduction heat gains
  • People load
  • Loads due to lights and equipment.
  • Infiltration load
  • Ventilation load
  • Radiant and solar heat gains
• Design of Air Distribution System (Duct Design)
  • Total, static and velocity pressures
  • Changes in pressure in a duct
  • Loss in static pressure due to friction
  • Fan laws and fan performance curves
  • System characteristic curves
  • Fan selection
  • Duct design
• Operation of HVAC
• System Selection and Control
  • System selection.
  • Control devices
  • Types of control systems
  • Basic control theory
• Energy Conservation
  • Determination of energy conservation opportunities (ECOs) in HVAC Systems
  • Diagnostics and refining
  • Implementation and maintenance
  • Economic considerations.
• There will be a one-hour lunch break each day in addition to a
• refreshment and networking break during each morning and afternoon
• session.
• After Participating in this Course, You Will be Able to:
  • Understand key thermodynamics, fluid mechanics and heat transfer
  • fundamentals and their practical application in the design and operation of HVAC systems.
  • Learn systematic procedures for cycle and load calculations.
  • Gain insight into the determination of opportunities of energy conservation and selection of appropriate types of control for the application of interest.
• HVAC
  • The heat load of a room.
  • The heat load of a multi-room complex.
  • The cooling capacity.
  • The airflow rate.
  • The fresh air requirements.
  • The DX systems.
  • The chilled water systems.
  • Chilled water flow rates & piping sizing.
• HVAC Design
• Chilled water pump selection.
• Building Management System and Control System
• DX system piping sizing.
• Typical piping connections "DX units, chillers, pumps, AHU's and FCU's".
• Insulation thickness & the criteria for condensation prevention.
• Duct sizing
• Air filtration.
• The behavior of the fruit/vegetable after harvesting.
  • How cold stores can extend the life of the products.
  • How to decide the cold room dimensions
  • The heat load of the cold room. (Chilling, frozen products, Potato and Onions)
• Cold stores design
  • Pre-cooling. "Wet cooling".
  • Selection of the refrigeration system components.
  • The insulation panels and doors.
  • The docks "Levelers, shelters and doors".
  • Ventilation for potato and onions.
  • Reference data and tables.
  • Documentation
  • As-built hand over package documentation after completion of the installation
  • Records and bookkeeping
  • Questions and answers
  • Case study