Water enters a 5 mm diameter and 13 m long tube at 45C with a velocity of 0 3 m s The tube is maintained at a constant temperature of 8C The exit temperature of water is (a) 4 48C (b) 8 98C (c) 10 68C (d) 12 08C (e) 14 18C (For water, use k 0 607 W m K, Pr 6 14, v 0 894 10 6 m 2 s, c p 4180 J kg K,...

Engineering
Heat And Mass Transfer Fundamentals And Applications
Water enters a 5-mm-diameter and 13-m-long tube at 45C with

Water enters a 5-mm-diameter and 13-m-long tube at 45C with a velocity of 0.3 m/s. The tube is maintained at

Question:

Water enters a 5-mm-diameter and 13-m-long tube at 45ºC with a velocity of 0.3 m/s. The tube is maintained at a constant temperature of 8ºC. The exit temperature of water is
(a) 4.48C

(b) 8.98C

(d) 12.08C

(e) 14.18C

(For water, use k = 0.607 W/m · K, Pr = 6.14, v = 0.894 × 10^-6 m²/s, c_p = 4180 J/kg · K, ρ = 997 kg/m³)

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