Long cylindrical AISI stainless steel rods (k =7.74 Btu/h·ft·°F and a = 0.135 ft2/h) of 4-in-diameter are heattreated by drawing them at a velocity of 7 ft/min through a21-ft-long oven maintained at 1700°F. The heat transfer coefficientin the oven is 20 Btu/h·ft2·°F. If the rods enter the ovenat 70°F, determine their centerline temperature when theyleave. Solve this problem using analytical one-term approximationmethod (not the Heisler charts).
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
Long cylindrical AISI stainless steel rods (k =
7.74 Btu/h·ft·°F and a = 0.135 ft2/h) of 4-in-diameter are heat
treated by drawing them at a velocity of 7 ft/min through a
21-ft-long oven maintained at 1700°F. The
in the oven is 20 Btu/h·ft2·°F. If the rods enter the oven
at 70°F, determine their centerline temperature when they
leave. Solve this problem using analytical one-term approximation
method (not the Heisler charts).
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