Engineering, 02.11.2019 05:31 brooklym2940

Atube bank consists of 300 tubes at a distance of 6 cm between the centerlines of any two adjacent tubes. air approaches the tube bank in the normal direction at 20°c and 1 atm with a mean velocity of 6 m/s. there are 20 rows in the flow direction with 15 tubes in each row with an average surface temperature of 140°c. for an outer tube diameter of 2 cm, determine the average heat transfer coefficient. evaluate the air properties at an assumed mean temperature of 70°c and 1 atm.

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