Heat Loss from a Cylindrical Pipe (no insulation)
Steam at 300°C flow in a cast iron circular pipe (k=80W/m.K). Determine the heat loss per unit length of the pipe to the surroundings at T?=20°C, with a combined (radiation & convection) heat transfer coefficient of h2=20 W/m2.K). The convection coefficient inside the pipe is h1=50 W/m2.K)