A 50 mm steam coil with outside diameter 60.3 mm(0.0603 m) and length 10 m with 1 bar absolute pressure and steam temperature 120 oC is submerged in an oil bath with temperature 50 oC.
The surface area of the coil can be calculated by multiplying the pipe circumference with pipe length as
A = π (0.0603 m) (10 m)
= 1.89 m2
From the table above the heat transfer coefficient is 170 W/m2 oC for "Steam to Light Oil, Natural Convection". The heat transfer can be calculated as
Q = (1.89 m2)((120 oC) - (50 oC))(170 W/m2 oC)
= 22491 W
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