We want to increase the air temperature from 14.4°C to 30°C by passing over a bank...
We want to increase the air temperature from 14.4°C to 30°C by passing over a bank of brass tubes inside which steam at 100°C is condensing (c4 = 5680). The tubes (L=0.61 m, D.-1.27 cm, & wall thickness d=0.125 cm) are arranged in-line in a square pattern with a pitch of 1.9 cm inside a rectangular shell (0.61 m wide, 38 cm high). If the total mass flow rate of air is 4 kg/s, calculate the following parameters. Brass tubes...
Write the solution of the maximum Reynolds number of the flow passing over the tube bundle here. (b) Estimate the average Nusselt number of the flow passing over the tube bundle. (choose the closest answer) Write the solution of the average Nusselt number of the flow passing over the tube bundle here (c) Estimate the number of required transverse rows. (choose the closest answer) Write the solution of the number of required transverse rows here. Question 13 (5 points) We...
1 points QUESTION 13 Air is to be heated by passing it over a bank of 3-m-long tubes inside which steam is condensing at 100 C. Air approaches the tube bank in the normal drection at 20 C and 1 atm with a mean velocity of 5.2 m/s. The outer diameter of the tubes is 1.6 cm, and the tubes are arranged staggered with longitudinal and transverse pitches of SL ST 4 cm. There are 20 ows in the flow...
Waste heat of exhaust hot air from a manufacturing process may be recovered by passing water through a thin-walled tube of 1.00 cm diameter as shown. Assume the temperature of the hot air is 177℃ in cross flow with a velocity of 20 m/s over the tube. The inlet and outlet temperature of water are 20C and 60 C, rospectively, and the ilow rate is 0.2 k/s. Deiemine (a) the total heat transfer rate from air to water, (b) The...