Question

please solve

chi. Iduulu 1 8_48E Air at 1 atm and 60°F is flowing through a 1 ft xe square duct made of commercial steel at a rate of 1200 cfm Determine the pressure drop and head loss per ft of the duct 1 ft Air 1200 ft3/min 1 ft FIGURE P8–48E

Answer 1

Given that:

Air at 1 atm

Temperature t = 60 deg F

Cross sectional area = 1 ft * 1 ft

Commercial steel at a rate of 1200 cfm
Anweo Ai 1800 6t/min Cotoss-seitional area oh tha squale dut AZIXI Calulata the veloity ob blow VaV/A Chatarteitistiy dungth tov a squavte dut Ad dhe given tempeutatuu and predure dentity 06 a p0101 tbm/ Dyrmmit Vi cosity ot ain at thu ghven-tempeotatiu

ouleulation ot oreynedds numbey Re z 0.0464x0 1 Re - 1135105 Re= 0.00001135 le 134695.5 Sinee the obteuined oeynodds numbeo d more than in tubulent natwu o0 bla equivalent oug hnes boy eommectial steel brom. Halle eguivalont otoug hneu Value tov new commeuteial Dine onideored dte be z0. 0005 the duut elatove Youghnes is - 0.00015 ED0.00015 trom codebotoo e boiction teuto can be caluk ated 34

0.00015 9.51 .0 o 1-34 62555 3. Vf :Olog .05 -0.01104 resure drop in the daut tov dtuoibulent blow is givenby APEt But ressure lou pect unit Jungth given by &D 0.0164 xdo 32.2 AP x 0.03105 20.0140u x 30.56 AP : 0.01404 x 5.28 Y0.03105 42 - 8-08 xt' psilbt caluilatien o heout dou neot beed AP

hiz 0.0t64K32.2 4 Q46008 h0.033 6t. he meuuve doy is obteuned eu 8.08 r 10 p i/it and the head dou is abteuned au 0-033b