Heat transfer A channel of square-shaped cross section, 30 mm by 30 mm, carries

Question

Heat transfer

A channel of square-shaped cross section, 30 mm by 30 mm, carries water at a rate of m. = 2kg/s. The channel length is L = 10 m and the inlet and outlet temperatures of water are Tmi = 30 degree C to T m,0 =50 degree C, respectively. If the surface temperature of the channel is maintained at Ts = 90 degree C, calculate the average heat transfer coefficient h - [W/m2 .K]. Calculate the total heat transfer rate q [W]to the water. If the boundary condition on the surface changes from Ts = constant to qs n = constant, while all the other input parameters remain intact, calculate qns [W/m2]. NOTE: Heat convection coefficient is not an input parameter. Considering qn s = constant, calculate the surface temperature of the channel at the outlet.

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