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Commercial HVAC Duct Design Part 1
In Commercial HVAC Duct Design Part 1, you'll learn ...
- The engineering principles that govern commercial HVAC duct system design
- The relationships between airflow, pressure, density, and energy in duct systems
- The calculation of duct friction and fitting losses for commercial HVAC applications
- How to apply engineering equations to evaluate airflow performance and support fan selection
Overview
Preview a portion of this course before purchasing it.
Credit: 1 PDH
Length: 20 pages
The design of ductwork is as much an art as it is a science. An experienced engineer or contractor can design ductwork that is not only energy efficient, but simple and straightforward to build using a minimum of materials and labor. For most people, ductwork is the “out of sight, out of mind” mechanical system we take for granted that exists either above or below - hidden away by attractive floors and ceilings. It generally goes unnoticed unless poorly designed, which can result in building occupant discomfort due to excessive noise and/or temperature control issues.
Ductwork can be defined as a network of round, oval, rectangular, or combination of gas conveying conduits of varying sizes. Ducts can deliver or remove gases (usually air) to or from one or more spaces for the purposes of ventilation, heat exchange, particulate removal, pressure control, or other specialized manufacturing and industrial processes. Ductwork can be arranged in simple single zone systems or massive multi-zone multi-story systems serving hundreds of rooms in buildings as large as hundreds of thousands of square feet.
This is the first course in a two-part course series. Each course has two sections:
Part 1 (This Course)
Section 1 – Engineering Tools: Encompasses the engineering tools at our disposal used in duct design.
Section 2 – Duct and Fitting Losses: Explains the calculation of ductwork friction and fitting losses.
Part 2
Section 3 – Air Distribution Systems: Covers air distribution systems and components
Section 4 – Duct Design Methods: Explores the various duct design methods, a project building, and adds some best practice tips.
Example problems are provided throughout the course to reinforce the concepts learned.
Mechanical engineers working in HVAC design or operations and maintenance will benefit from this course. This course is focused on commercial building duct design, however, the concepts introduced will not only provide a solid foundation of knowledge but also equip you with the tools necessary to design ductwork for any type of duct system: residential, commercial, industrial, or institutional.
Specific Knowledge or Skill Obtained
This course teaches the following specific knowledge and skills:
- The distinction between mass flow rate and volumetric flow rate and their relationship through fluid density
- The characteristics of static, velocity, and total pressure in HVAC duct systems
- The application of the continuity equation to determine airflow velocity and duct sizing relationships
- The use of the Bernoulli equation to evaluate pressure changes, energy balance, and airflow through duct systems
- The influence of buoyancy and density differences on vertical duct system performance
- The calculation of duct friction losses using the Darcy equation and hydraulic diameter
- The determination of friction factor using Reynolds number and the Colebrook equation
- The calculation of fitting losses using ASHRAE loss coefficients and velocity pressure
- The evaluation of total duct system pressure losses for fan selection and system analysis
- How to interpret engineering example problems to analyze commercial HVAC duct performance and pressure losses
Certificate of Completion
You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 15 questions. PDH credits are not awarded until the course is completed and quiz is passed.
| This course is applicable to professional engineers in: | ||
| Alabama (P.E.) | Alaska (P.E.) | Arkansas (P.E.) |
| Delaware (P.E.) | District of Columbia (P.E.) | Florida (P.E. Area of Practice) |
| Georgia (P.E.) | Idaho (P.E.) | Illinois (P.E.) |
| Illinois (S.E.) | Indiana (P.E.) | Iowa (P.E.) |
| Kansas (P.E.) | Kentucky (P.E.) | Louisiana (P.E.) |
| Maine (P.E.) | Maryland (P.E.) | Michigan (P.E.) |
| Minnesota (P.E.) | Mississippi (P.E.) | Missouri (P.E.) |
| Montana (P.E.) | Nebraska (P.E.) | Nevada (P.E.) |
| New Hampshire (P.E.) | New Jersey (P.E.) | New Mexico (P.E.) |
| New York (P.E.) | North Carolina (P.E.) | North Dakota (P.E.) |
| Ohio (P.E. Self-Paced) | Oklahoma (P.E.) | Oregon (P.E.) |
| Pennsylvania (P.E.) | South Carolina (P.E.) | South Dakota (P.E.) |
| Tennessee (P.E.) | Texas (P.E.) | Utah (P.E.) |
| Vermont (P.E.) | Virginia (P.E.) | West Virginia (P.E.) |
| Wisconsin (P.E.) | Wyoming (P.E.) | |
Preview a portion of this course before purchasing it.
Credit: 1 PDH
Length: 20 pages
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