| 1. Duct Design <8
hours> |
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A. Pressure Variations
in a Duct System |
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1) Concepts: |
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a) Static, Velocity & Total
Pressure
b) Losses
c) Takeoff Variations
d) Effect of Fabrication on Regain
e) Reducer Variations
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B. Equal Friction Duct
Design |
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1) Use of Air Friction
Chart & Ductulator |
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2) Create Your Own Design
Method |
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3) Round Versus Rectangular |
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4) Airflow Balancing |
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C. Static Regain Duct
Design |
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1) Efficiency &
Inherent Balance |
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2) Computerized Duct
Design Analysis |
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| Purpose: Duct
Design is intended to give the student a better understanding
of what happens to air as it moves through a duct system. They
will learn how certain design variables affect the overall losses.
This course will help a designer know when to use one design over
the other and how best to optimize each design for the particular
application. |
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| 2. Fans & Fan Laws
<8 hours> |
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A. Definitions |
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B. Concepts |
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1) Resistance Versus
Velocity |
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2) Fan Testing |
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3) Fan Curves |
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4) Fan Surge |
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5) System Curve |
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C. Fan Laws |
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1) #1 Effect of RPM
Change |
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2) #4 Density Change
- Constant Volume |
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3) #6 Density Change
- Constant Mass Flow Rate |
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D. Fan Types |
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E. Fan Modulation Methods |
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| Purpose: Fans
& Fan Laws is intended to give the student a better understanding
of how a fan works and which fan works best for each application.
It will help a student to diagnose problem jobs as well as to
increase the overall efficiency of a new design. They will learn
how certain design variables such as size, RPM, type and class
affect the overall efficiency and acoustical performance of a
particular fan. Most importantly, the will learn how to use the
fan laws to make important changes in existing fan systems. |
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| 3. Acoustics <6 hours> |
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A. Concepts |
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1) Noise, Audiometry,
Sound |
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2) Frequency, Wavelength
& Amplitude |
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3) Pure Tone, Broad
Band & White Noise |
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4) Sound Pressure, Power
& Intensity |
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5) Octave Bands |
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6) Acoustical Sound
Meters |
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7) Free Fields Versus
Far Fields |
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8) Anechoic versus Reverberation
Chambers |
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9) NC Versus NR Curves |
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B. Acoustic Rules of
Thumb |
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C. Effectiveness of
a Sound Barrier |
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D. Why Humans Hear Differently
Than A Microphone |
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E. How To Do A Sound
Map |
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F. How To Calculate
Influence of Background Noise |
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G. How To Calculate
The Influence of Multiple Source |
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H. Manual Example Problem |
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| Purpose: Acoustics
is one of the least understood aspects of HVAC design. This course
lays a practical foundation that allows the student to handle
a majority of acoustical problems they are likely to face. On
existing problem jobs the student will learn what are the most
cost effective ways to reduce sound levels. And on a new job,
they will learn how best to design the proper acoustical levels
up front. |
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| 4. Introduction to IAQ
<2 hours> |
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A. Concepts: This is
a broad coverage of the primary Indoor Air Quality issue that
we face in the HVAC Industry today. The amount we dig into this
topic will depend upon how much time is available after covering
the previous topics. |
