Oil is flowing through a 75 mm ID iron pipe at 1 m s It is being heated by steam out side the pipe, and the steam film coefficient may be taken as 11 kW m 2 C At a particular point along the pipe, the oil is at 50C, its density is 880 kg m 3 , its viscosity is 2 1 cP, its thermal conductivity is 0 ...

To calculate the overall heat transfer coefficient we need to consider the different modes of heat transfer convection conduction and fouling Convecti ...

Oil is flowing through a 75-mm-ID iron pipe at 1 m/s. It is being heated by steam

Question:

Oil is flowing through a 75-mm-ID iron pipe at 1 m/s. It is being heated by steam out-side the pipe, and the steam-film coefficient may be taken as 11 kW/m²· C. At a particular point along the pipe, the oil is at 50°C, its density is 880 kg/m³, its viscosity is 2.1 cP, its thermal conductivity is 0.135 W/m · °C, and its specific heat is 2.17 J/g · °C. What is the overall heat-transfer coefficient at this point based on the in-side area of the pipe? If the steam temperature is 120°C, what is the heat flux at this point based on the outside area of the pipe?

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