Engineering, 15.04.2020 02:45 taylor5384

Liquid flows in a metal pipe with an inner diameter of D1 = 22 mm and an outer diameter of D2 = 32 mm. The thermal conductivity of the pipe wall is 12 W/m⋅K. The inner surface of the pipe is coated with a thin polyvinylidene chloride (PVDC) lining. Along a length of 1 m, the pipe outer surface is exposed to convection heat transfer with hot gas, at T[infinity] = 100°C and h = 5 W/m2⋅K, and thermal radiation with the surrounding at Tsurr = 100°C. The emissivity at the pipe outer surface is 0.3. The liquid flowing inside the pipe has a convection heat transfer coefficient of 50 W/m2⋅K. If the outer surface of the pipe is at 81°C, determine the temperature at the PVDC lining and the temperature of the liquid. The ASME Code for Process Piping (ASME B31.3-2014, A323) recommends a maximum temperature for PVDC lining to be 79°C. Does the PVDC lining comply with the recommendation of the code?

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Liquid flows in a metal pipe with an inner diameter of D1 = 22 mm and an outer diameter of D2 = 32 m...