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Question: a water pipe with electrically heated walls is exposed to...

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A water pipe with electrically heated walls is exposed to ambient with natural convection of 50 W/m2K and air temperature of 23°C. Water enter the pipe at 15°C and exits at 25°C having a mass flow rate of 0.01 kg/s. The diameter of the pipe is 5 cm and its length is 0.5 m. The wall of pipe is thin and may be assumed to be isothermal at steady-state with a temperature Ts. Knowing that the heat flux applied to the wall of the pipe is 5.5 kW/m2, determine wall temperature Ts.

A water pipe with electrically heated walls is exposed to ambient with natural convection of 50 W/m-K and air temperature of 23°C. Water enter the pipe at 15°C and exits at 25°C having a mass flow rate of 0.01 kg/s. The diameter of the pipe is 5 cm and its length is 0.5 m. The wall of pipe is thin and may be assumed to be isothermal at steadvstate with a temperature T. Knowing that the heat flux applied to the wall of the pipe is 5.5 kW/m2, determine wall temperature T Tair-23°C, h-50 W/m2K Electrically heated wall with 5.5 kW/m2 To-25°C 5 cm 0.01 kg/s T 15°C 0.5 m

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