Estimate the natural convection heat transfer coefficient of the horizontal pipe. The temperature of the outer surface of the pipe is 120 ° C. The ambient air temperature is 30 ° C. The outer diameter...

Estimate the natural convection heat transfer coefficient of the horizontal pipe. The temperature of the outer surface of the pipe is 120 ° C. The ambient air temperature is 30 ° C. The outer diameter of the pipe is 15 cm. Convection coefficient = W / m2 ° C.