Print this page Overview of General Purpose & Industrial Ventilation Systems
A. Bhatia, B.E.
Course Outline
Ventilation is
one of the most important engineering techniques for controlling the quality
of air in an environment. The selection, design and installation of ventilation
system is a complex process which should involve professionals familiar with
'comfort' or 'hazard' control. In many cases improper design could result in
the 'sick building' syndrome and in many industrial applications can be hazardous
to the health of the worker.
This 4- hour course discusses some practical design considerations for the ventilation
systems and their components. The recommendations presented in this paper are
the basic guidelines and prudent practices.
This course includes a multiple-choice quiz at the end, which is designed to
enhance the understanding of the course materials.
Learning Objective
At the conclusion of this course, the student will be aware of:
- The factors affecting the ventilation design;
- General purpose ventilation for summer, winter and fall conditions;
- The types of mechanical ventilation systems;
- The displacement ventilation;
- The natural ventilation - Building stack and wind effect;
- The ventilation strategies for Indoor Air Quality;
- The basic filtration techniques;
- Estimating ventilation rate based on air quality, air change and heat removal method;
- The concepts of Industrial ventilation and regulatory information;
- Dilution ventilation and local exhaust ventilation;
- The principles of hood design, fan selection and associated components; and
- Basic design
considerations for ventilation systems.
This course is aimed at students, mechanical and HVAC engineers, architects, building designers, contractors, civil estimators, energy auditors, facility managers and general audience.
Course Introduction
The object of providing
ventilation in buildings is to provide conditions under which people can live
in comfort and work safely and efficiently. Ventilation can be divided into
two types: comfort and hazard control. Comfort ventilation is part of the heating,
ventilating, and air-conditioning (HVAC) systems built to control temperature,
humidity, and odours whereas hazard control involves the use of ventilation
to control exposure and prevent the accumulation of hazardous/flammable vapors.
This course provides the design aspects of Indoor air quality ventilation required
for residential, commercial and other non-industrial buildings. A dedicated
section is included to cover industrial ventilation, which discusses the principle
techniques and regulatory information for the prevention of hazards. In addition
to the general section, the course is divided into the following six sections:
Section# 2 Type of Ventilation Systems
Section# 3 Ventilation Strategies for Indoor Air Quality
Section# 4 Estimating Ventilation Rates
Section# 5 Industrial Ventilation
Section# 6 General System Design Considerations
Course Content
The course content is in a PDF file Overview of General Purpose & Industrial Ventilation Systems. You need to open or download this document to study this course.
Course SummaryIt is important
to provide at least a minimum amount of fresh air indoors, both for comfort
and for health. Odours and a sense of staleness can be uncomfortable, and buildups
of pollutants can be produced within buildings. These pollutants are easily
removed with air changes through rooms.
There are three basic types of mechanical ventilation system. The supply-only
system uses one or more fans to supply air to the building interior, relying
on exfiltration leakage to remove air from the building. The exhaust-only system
uses one or more fans to remove air from the building interior, relying on infiltration
to provide the make-up air supply required. The "balanced" system
uses a fan to supply air to the interior and another fan to remove air from
the interior.
Non-industrial buildings ventilation system primary objective is to ensure "Indoor air quality" where the ventilation system is integrated to the building's heating, ventilating and air-conditioning (HVAC) system. Industrial buildings on the other hand generally involves the use of supply and exhaust ventilation to control emissions, exposures, and chemical hazards in the workplace. Two prominent techniques used are 1) "Dilution ventilation" which dilutes contaminated air in a whole building or room by blowing in clean air and exhausting some dirty air and 2) "Local exhaust ventilation" which captures contaminates emissions at or very near the source and exhausts them outside.
The selection,
design and installation of ventilation systems is a complex process which should
involve professionals familiar with comfort or hazard control. In many cases
improper design can result in the 'sick building' syndrome or even can have
fatal consequences in industrial applications.
Quiz
Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.
DISCLAIMER: The materials contained in the online course are not intended as a representation or warranty on the part of PDH Center or any other person/organization named herein. The materials are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a registered architect and/or professional engineer/surveyor. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom.
