Hvac Duct Design Example Pdf

15 1 balancing the system.

Hvac duct design example pdf.

Treatment may be specified in a single hvac duct system. Smoke exhaust ductwork internal insulated smoke exhaust ductwork must have perforated metal lining coated with fire rated spraying wrapping cladding and etc must applied where smoke exhaust ductwork in a different fire compartment it serves construction of 1 2mm galvanised steel or 0 9mm stainless steel thick ductwork. Duct system design page 1 5 energy is due to elevation above a reference datum and is often negligible in hvac duct design systems. 15 3 air flow measurement instruments.

What does exist is difficult to understand. There is a wealth of information available concerning air volume determination heating and cooling loads fan selection and specification. 15 4 determining air flow at grilles. 15 6 provisions during design for testing adjusting and balancing.

The north wall has 6 windows and the south wall has 9 windows. The fibrous glass duct system may be used. Consequently the total pressure or total energy of air flowing in a duct system is generally equal to the sum of the static pressure and the velocity pressure. 14 2 acoustical analysis of a ductwork system.

15 5 determining air flow in ducts. The east and west walls each have two windows. Example a building 35 feet wide and 73 feet long is constructed with the type of concrete wall indicated in figure 1. 15 2 testing methods and equipment.

Ductwork design considerations 33 11 1 duct frictional resistance 33 11 2 duct equivalent length 35 11 3 ductwork system effect 35 11 4 installation issues 37 11 5 ductwork insulation 38 11 6 ductwork air leakage 39 11 7 testing methods and equipment 40 11 8 ductwork sealing 41 11 9 volume flow rate measurements 42. As an equation this is written. Duct design fundamentals static pressure ps measure of the static energy of air flowing air which fills a balloon is a good example of static pressure equally exerted in all directions the atmospheric pressure of air is a static pressure 14 696 psi at sea level. For example in a variable air volume system sheet metal ducts with fibrous glass duct liner may be used on the high pressure side if design static pressure exceeds the 2 in.

500 pa limits of the fibrous glass duct system. The concrete is 4 inches thick and the polystyrene insulation is 2 inches thick on each side.