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Air flows in a tube (ID=15cm, L=5m) for cooling from 103C to 77C. (Re=20000, Heat capacity (air)=1010J/kgC , h o =18W/m 2 C, Neglect wall
Air flows in a tube (ID=15cm, L=5m) for cooling from 103C to 77C. (Re=20000, Heat capacity (air)=1010J/kgC , ho=18W/m2C, Neglect wall thickness and thermal resistance of wall) 1. What is the reference temperature of Re number for the air flowing in the tube? 2. Calculate the heat loss(q) from the air in W. 3. Calculate the heat transfer coefficient of the air (hi) in W/m2C.
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