For the heater consisting of the tube bank
described in Problem 20.32, evaluate the heat transferred to the water if the
tube array consists of six rows of tubes in the flow direction with eight tubes
per row. The tubes are 5 ft long.
An industrial heater is composed of a tube
bundle consisting of horizontal 3/8-in.-OD tubes in a staggered array with
tubes arranged in equilateral triangle fashion having a pitchto-diameter ratio
of 1.5. If water at 160F flows at 20 ft/s
past the tubes with constant surface temperature of 212F, what will be the
effective heat-transfer coefficient?
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