14:51 ← myclassroom.cput.ac.za HEAT TRANSFER Take Test: Assignment 1 QUESTION 10 Air is to be heated by passing it over

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14 51 Myclassroom Cput Ac Za Heat Transfer Take Test Assignment 1 Question 10 Air Is To Be Heated By Passing It Over 1 (32.16 KiB) Viewed 32 times

14:51 ← myclassroom.cput.ac.za HEAT TRANSFER Take Test: Assignment 1 QUESTION 10 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 direction 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 rows in the flow direction with 10 tubes in each row. Determine (a) the rate of heat transfer, (b) Pressure drop across the tube bank, a. 74.84 kW; 283.9 Pa b. 49.52 kW; 249.8 Pa c. 61.52 kW; 230.8 Pa d. 52.52 kW; 190.8 Pa + LTE 52