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A Air at a temperature of 134°C and atmospheric pressure flows with a velocity of 7 m/s over


a smooth 5 m long and 1 m wide cast iron plate. Under steady-state conditions, the air-side


surface temperature of the plates is at 120°C. Under the described conditions, determine the


overall heat transfer rate through the plate.


B-If the flat plate in (A) is replaced with a cylinder with the same surface area (heat transfer


area) and the cylinder's length is the same as the width of the plate (1.0 m), what would be the


heat transfer rate for cross air flow over the outside surface of the cylinder?


C. If the flat plate in (A) is replaced with a sphere with the same surface area (heat transfer area),


what would be the heat transfer rate for cross air flow over the outside surface of the sphere?


D- Based on your results, discuss which surface configuration is more effective for heat

Sagot :

The answer would be d
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