Answer to Question #284127 in Mechanical Engineering for xcereyann

Question

2. Water enters a pipe at a temperature of 27°C and a flow rate of 450 kg/h. Heat flux is applied from outside the pipe, q'=ax (W/m). Here, a=20 W/m2 is a constant and x(m) is the length from the entrance.

a) Find the average temperature of the water flowing through the pipe as a function of the pipe length.

b) Find the outlet temperature of the water from a 30 m long pipe. (cp=4179 J/kgK)

Answer 1

Heat flux (Ф) can be defined as the rate of heat energy transfer through a given surface (W), and heat flux density (φ) is the heat flux per unit area (Wm²).