Solve Problem 19.29 for the case of a wall heat flux varying according to

where α = 250 Btu/h ft², β = 1500 Btu/h ft², x is the distance from the entrance, and L is the tube length.

Data From Problem 19.29

Water at 60°F enters a 1-in.-ID tube that is used to cool a nuclear reactor. The water flow rate is 30 gal/min. Determine the total heat transfer, the exiting water temperature, and the wall temperature at the exit of a 15-ft long tube if the tube wall condition is one of uniform heat flux of 500 Btu/hr ft².

Transcribed Image Text:

a + B sin- пх = |A