A long nickel alloy (ASTM B335) cylindrical rod is used as a component in high-temperature process equipment. The rod has a diameter of 5 cm; its thermal conductivity, specific heat, and density are 11 W/m-K, 380 J/kg - K, and 9.3 g/cm³, respectively. Occasionally, the rod is submerged in hot fluid for several minutes, where the fluid temperature is 500°C with a convection heat transfer coefficient of 440 W/m2.K. The ASME Code for Process Piping limits the maximum use temperature for ASTM B335 rod to 427°C (ASME B31.3-2014, Table A-1M). If the initial temperature of the rod is 25°C, how long can the rod be submerged in the hot fluid before reaching its maximum use temperature? To = 500°C h=440 W/m²-K Nickel alloy T, °C D = 5 cm The time taken is 188.03 seconds.
A long nickel alloy (ASTM B335) cylindrical rod is used as a component in high-temperature process equipment. The rod has a diameter of 5 cm; its thermal conductivity, specific heat, and density are 11 W/m-K, 380 J/kg - K, and 9.3 g/cm³, respectively. Occasionally, the rod is submerged in hot fluid for several minutes, where the fluid temperature is 500°C with a convection heat transfer coefficient of 440 W/m2.K. The ASME Code for Process Piping limits the maximum use temperature for ASTM B335 rod to 427°C (ASME B31.3-2014, Table A-1M). If the initial temperature of the rod is 25°C, how long can the rod be submerged in the hot fluid before reaching its maximum use temperature? To = 500°C h=440 W/m²-K Nickel alloy T, °C D = 5 cm The time taken is 188.03 seconds.
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Transcribed Image Text:A long nickel alloy (ASTM B335) cylindrical rod is used as a component in high-temperature process equipment. The rod has a
diameter of 5 cm; its thermal conductivity, specific heat, and density are 11 W/m-K, 380 J/kg K, and 9.3 g/cm³, respectively.
Occasionally, the rod is submerged in hot fluid for several minutes, where the fluid temperature is 500°C with a convection heat
transfer coefficient of 440 W/m2.K. The ASME Code for Process Piping limits the maximum use temperature for ASTM B335 rod to
427°C (ASME B31.3-2014, Table A-1M). If the initial temperature of the rod is 25°C, how long can the rod be submerged in the hot fluid
before reaching its maximum use temperature?
Too = 500°C
h=440 W/m²-K
Nickel alloy
T, °C
D = 5 cm
The time taken is 188.03 seconds.
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