Objectives. Finish with Duct Design Review the design procedure and explain the theoretical background Diffuser Selection. Frictional Losses. Dynamic losses. Losses associated with Changes in velocity Obstructions Bends Fittings and transitions. Air Distribution System Design.
V = maximum volumetric flow rate (m3/s, ft3/min)
Qtot = total design load (W, BTU/hr)
Qsen = sensible design load (W,BTU/hr)
ρ = air density (kg/m3, lbm/ft3)
Δt = temperature difference between supply and return air (°C, °F)
Δh = enthalpy difference between supply and return air (J/kg, BTU/lbm)Diffuser Selection Procedure
ADPI considers ONLY thermal comfort (not IAQ)