Calculate the water side heat transfer coefficient and the coolant pressure drop per unit length of tube for the core of a compact air-to-water intercooler for a 5,000 hp gas turbine plant. The water flows inside of a flattened aluminum tube having the cross-section shown below.

The inside diameter of the tube before it was flattened was 0.485 in. (1.23 cm) with a wall thickness (t) of 0.01 in. (0.025 cm). The water enters the tube at 60?F (15.6?C) and leaves at 80?F (26.7?C) at a velocity of 4.4 ft/s (1.34 m/s).GIVENWater flow in a flattened tube as shown aboveInlet temperature (Ti) = 15.6?COutlet temperature (To) = 26.7?CWater velocity (V) = 1.34 m/sASSUMPTIONSSteady stateFully developedflow

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0.2 cm 1.6 cm