Aeration System - Piping System 1

Piping System

1). Arrangement of air header pipe

From blower to aeration tank, pipe length = 100 ft, D = 18 ", V= 3,300 fpM

Distribution Header D = 18", Length = 62 ft

Branch of Air Header d = 12", Length = 96 ft

2). Total friction head loss from blower to last branch header

Find h_branch/100 ft from Chart CFM-D-Temperature-Gauge Pressure-H(CFM-D-T-P-H chart)

T �F = 9/5 �25�C + 32 � 80 �F

Gauge pressure > 6.5 (depth)+ 0.1(Swig aerator) + 0.3(diffuser)� 7 Psi

Select gauge pressure of blower � 8 Psi

Branch Header:

H_12" = h_branch � L = 0.28"/100 � 96 = 0.27"

Division header, d = 16"

For Q = 3,550 CFM

H_14" = 0.66" � 0.31 = 0.20" (H₂O)

For Q_air = 3 � 1,775 CFM = 5,325 CFM

H_14" = 0.65"/100 � 31 = 0.20" (H₂O)

Main Header , Q = 10,226,440/24 � 60 = 7,100 CFM

H_18" = 0.64"/100 � 100 = 0.64"

Total head loss H_t = 0.64 + 0.20 + 0.20 + 0.27 = 1.31" � 0.05 Psi