Engine oil flows through a 25-mm-diameter tube at a rate of 0.5 kg/s. The oil enters the tube at a temperature of 25°C, while th
e tube surface temperature is maintained at 100°C. (a) Determine the oil outlet temperature for a 5-m and for a 100-m long tube. For each case, compare the log mean temperature difference to the arithmetic mean temperature difference.
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Answer:
Work done by the fluid in the piston=164.5kJ/kg
Specific gas constant= 0.263 kJ/kg K
Molecular weight of gas= 31.54 kmol
