Thursday, December 20, 2018

HVAC - How to Size and Design Ducts (Free PDF)



File Size: 3.73 mb
Description
Air flow problems have plagued the HVAC industry for years. No matter how much money you spend on a high-quality HVAC system, the equipment won’t work at its best without properly designed and installed duct work. Ducts that are not well designed result in discomfort, high energy costs, bad air quality, and increased noise levels.
A well-designed duct work system should deliver maximum interior comfort at the lowest operating cost while also preserving indoor air quality. The chief requirements of an air conditioning duct system are:

1. It should convey specified rates of air flow to prescribed locations.
2. It should be economical in combined initial cost, fan operating cost and cost of building space.
3. It should not transmit or generate objectionable noise.

A primary issue is the trade off between the initial cost of the duct system and the energy cost of the air distribution system. Larger ducts require a larger initial investment, but result in lower fan energy costs over the life of the system. Other issues include space restrictions, noise level, capacity for expansion, appearance, etc.

Content:-
1.0. DUCT WORK DESIGN PRINCIPLES
2.0. DUCT COMPONENTS & MATERIALS
3.0. DUCT CLASSIFICATION
4.0. DUCT SHAPES
5.0. DUCT SIZING
6.0. PRESSURE LOSSES IN AIR DISTRIBUTION SYSTEM
7.0. FAN SIZING
8.0. THE SUPPLY DUCT SYSTEM
9.0. RETURN DUCT SYSTEMS
10.0. DUCT FITTINGS AND TERMINAL UNITS
11.0. DUCT CONSTRUCTION & REINFORCEMENT
12.0. GOOD ENGINEERING PRACTICES
13.0. DUCT WORK INSULATION AND SEALING
14.0. DUCT ATTENUATION AND NOISE CONSIDERATIONS
15.0. DUCT WORK TESTING & SYSTEM PERFORMANCE
16.0. DUCT CLEANING


Author Details
"A. Bhatia"



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