Question

A press stream C is fed to heat exchanger with an overall heal fer coefficient of M W AKA second press stream, C2, is fed to beat exchanger 2 with all overall heat transfer coefficient of 1200 W K "The mission rate of streamclis 1 kg min, and the mass flow rate of stream C2 is 2 min. Streams Cland C2 need to be heated in their respective that exchanges from 300 Kto480 K prior reaction. The reacties elus the needs to be cooled from 500 K 00 K in heat exchange with overall heat transfer coefficient of 0 W/ mK. The heat capacities of all streams are constant kyk Assume a capital Recovery factor of 0.2 over a 10-year period. a heat exchanger capital cost of $2.714 times the area in square meters operation of NOOO bryr, and the following cost and w e data below Determine the annual capital and utility cost of the process, Stream Hot Water Symbol Value HD Characteristics Heu duty Cost Het duty Cost Hea duty Cost HDS 4 SOKW SNKY SGOW SS KU MW 3x10 Cold Water HD. C 5 exchanger 1 U-800 W/m2.K exchanger 2 U1200 W/ mK 480K ABOK 300K 300K reactor 500K LOOK exchanger 3 BO W/m2K U

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Answer 1

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Solution : Given that The liquid p = 56.13 86143 = 909 kg/m3 M = 470 V = 800 gall min ~ 106.95 $tmin P = 15 lblin Page 103 bol anget value 72320 Ft Z, DF 1 225 F * * 2017 The angle value The gate value The Elbow volue Ka = 225 Kg = 0.12 Kc = 0.3 (6 inch with 4o): put ty + gzit e tha +93 + hp We known Flow rate = 800 gal/min = 106.95 he3/min. i To" When Di = 6.625 -0.20 = 6.345 in = 0.528 . OD # (0.528)

- The Velocity of liquid pipe & 106-9. ft -487 ft/min 0122 Filmin The head Loss through gate way is given by hfg - kg . Vậ0.12 (487) hig = 14,234 115 Ft/min the head loss elbow; hec = ke. Tam - 0.3.(487) hec = 35,575.3 Fe3/mist the head loss angel value; hea = kaya - 225 (4877 hfa - 266515 Ft/min. we know, Re = Davis - (0.528) (48 7) (56:13) 470 Re = 1692105 F769 F-16 5 0.02

ht=fluence ) = 002 (915) ( 493") hF = 14,59847 H3/min? The total head Loss = Elevation head t he thin Hy = (0)9 + 1459847 + +12 Hy = 14294 + 35575 +266815 Hy = 3,16, 62.4 FF lmr - 2009-81) + 1459847 +316624 HT = 1776670 ft/min? the Bernoully equation is given by: 197921 + y + 1924 HF when u = y, then (Po-) = g(2,-2)) + Hp = HT Then (P,- ) = HTP = (177670) Fi (56.13) +99724487 db/mol = 27,709 Ap = 41.223 kg/m sec lap = P,- P2 = 0.412 bou J has es positive so flow is from eq0 & " Pi-Pe=0.412 ba - Pl=0.412 +4003 ba = P = 10442 0,=20191 bad