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HVAC - Variable Air Volume Systems
In HVAC - Variable Air Volume Systems , you'll learn ...
- The components of a variable air volume (VAV) system and how the system operates
- The relative merits of VAV and constant air volume (CAV) systems
- Why VAV systems fell into disfavor in the past and why they are making a comeback
- VAV system control options
Overview
Preview a portion of this course before purchasing it.
Credit: 6 PDH
Length: 121 pages
In central air conditioning systems there are two basic methods for delivering air to the conditioned space: constant air volume (CAV) systems, and variable air volume (VAV) systems.
As the name implies, constant volume systems deliver a constant air volume to the conditioned space irrespective of the load. VAV systems, on the other hand, are designed to simultaneously meet a variety of cooling and heating loads in a relatively efficient manner. The system achieves this by varying the distribution of air depending on the cooling or heating loads of each area. The air flow variation allows for adjusting the temperature in a single zone without changing the temperature of air in the whole system, minimizing any instances of overcooling or overheating. This flexibility has made this one of the most popular HVAC systems for large buildings with varying conditioning needs such as office buildings, schools, or apartments.
This 6-hour course covers HVAC air distribution systems with the focus being on Variable Air Volume (VAV) systems.
Learning Objectives
Upon completion of this course, participants will be able to:
- Explain the operating philosophy of variable-air-volume (VAV) systems.
- Compare the advantages and disadvantages of VAV and constant-air-volume (CAV) systems.
- Identify applications that favor VAV systems over other options.
- Distinguish among pressure-dependent, pressure-independent, and volume-limiting VAV boxes.
- Classify fans used in air-handling systems, including forward-curved, backward-curved, radial, and airfoil designs.
- Compare cooling-coil configurations and identify which of face-split, vertical-split, and intertwined coils are appropriate for VAV systems.
- Apply duct-design principles to optimize VAV systems.
- Explain duct-pressure classification and its use in selecting duct-sheet thickness.
- Compare the equal-friction, static-regain, and T-method approaches to duct design.
- Identify outlet types and the parameters that govern their selection.
- Distinguish among fan-powered, single-duct, dual-duct, and bypass VAV boxes.
- Describe types of VAV controls, including direct digital controls.
- Explain acoustical considerations in VAV-system design.
- Identify common instruments used for acceptance testing and monitoring of VAV systems.
Certificate of Completion
You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 30 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: 6 PDH
Length: 121 pages
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