An exposed 8 cm external diameter 20 m long hot water pipe

Last updated: 8/29/2023

An exposed 8 cm external diameter 20 m long hot water pipe at 80 C is losing heat to the surrounding outdoor air by natural convection The average outdoor temperature is 5 C The heat transfer coefficient is 25 W m2 C What is the heat loss by natural convection in kW A 9 4 W B 10 0 W C 10 4 W D 11 4 W