Heat Transfer in an Aluminum Block
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What is the change in temperature of aluminum block that has continuous air flow directed over it? Assume block temperature to be constant throughout. Airstream is directed over part for 1 minute; assume airstream to be 25% efficient. Show all calculations.
Weight of block = 15 kg
Initial temp. of block = 95°C
Specific heat of Aluminum = .897 kJ/kgC
Temp of airflow = 40°C
Air flowrate = 50 m^3/Min
Density of air @ 40°C = 1.127 kg/m^3
Specific Heat air @ 40°C = 1.005 kJ/kgK
Note: I keep coming up with an answer of only 57 seconds. That seems to low. I have attached an excel spread sheet that I was using to solve my problem.
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The solution discusses heat transfer in an aluminum block.
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