Question

Problem 2 A volumetric flow rate of 120 L/min of ethylene glycol is to be cooled from 370 K to 310 K by pumping it through a 3.5 cm ID tube, the wall of which will be maintained at a temperature of 300 K. Table A.14 shows the properties of ethylene glycol. What length of tubing is required?

Need procedure, units & solution please! Urgent, Thank you

Table A.14

Answer 1

sd To=Book. Tis 370k To=310k. d-0.036m. 0-1902/min 30.00g my V-40 nar Re- Pm vd 0:079 m/s Flow Regime มm 310 8370k meon um- mon kg/m² fm = density but Viscosity. Pm= 1103.7 +1066:7 - 1085 um= (0.99841-07)x16? 6-649x10 ryms. Re=10850gx.00075X0:085 49:37 (lemmer) 0.649x16² For Lominoi. flow with Constant wall temp on tube Nuo 3-66. chd=3.66 Kom h-3-66(0.3585) 97-031 n/mak. Small longih elemd da 4 0.035 tube Apply eney Bek Consider me 17 hanc (4-7). di had ch mlp T-TS cll. -haD ds T-Ts mep 10 unt- -37-631 x 34002s L -s7B1 23.1440-035 01009 *1085.9 x 9«594x103 5-976x15 L 2 L=109617 L= 3667493 m In 31 310-300 370-300

using givend ata and heat baance and mean bulk properties we can find the required length of tube

for any doubstw rite in comments