# Question

Compute the average heat transfer coefficient hc for 10°C water flowing at 4 m/s in a long, 2.5-cm-ID pipe (surface temperature 40°C) by three different equations and compare your results. Also determine the pressure drop per meter length of pipe.

GIVEN

Water flowing through a pipe

Water temperature (Tb) = 10°C

Water velocity (V) = 4 m/s

Inside diameter of pipe (D) = 2.5 cm = 0.025 m

Pipe surface temperature (Ts) = 40°C

ASSUMPTIONS

Steady state

Uniform and constant wall surface temperature

Pipe wall is smooth

Fully developed flow (L/D >60)

GIVEN

Water flowing through a pipe

Water temperature (Tb) = 10°C

Water velocity (V) = 4 m/s

Inside diameter of pipe (D) = 2.5 cm = 0.025 m

Pipe surface temperature (Ts) = 40°C

ASSUMPTIONS

Steady state

Uniform and constant wall surface temperature

Pipe wall is smooth

Fully developed flow (L/D >60)

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