Hi. Here's the question. https://i.imgur.com/QYlC7S8.png

In a gas-fired boiler, water is being boiled at 120C by hot air flowing through a 5 m-long, 5-cm diameter tube submerged in water. Hot air enters the tube at 1atm and 300C at a mean velocity of 7 m/s, and leaves at 150C. If the surface temperature of the tube is 120C, determine the average convection heat transfter coefficient of the air and the rate of water evaporation in kg/h

Question

Hi. Here's the question. https://i.imgur.com/QYlC7S8.png

In a gas-fired boiler, water is being boiled at 120C by hot air flowing through a 5 m-long, 5-cm diameter tube submerged in water. Hot air enters the tube at 1atm and 300C at a mean velocity of 7 m/s, and leaves at 150C. If the surface temperature of the tube is 120C, determine the average convection heat transfter coefficient of the air and the rate of water evaporation in kg/h

surry99 · Answer

looks like an engineering heat transfer problem.