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Engineering, 22.01.2021 20:10 Hfruit

3000 kg of water is heated per hour from 30 to 70 0C by pumping it through a certain heated section of a 25 mm diameter tube. If the surface of the heated section is maintained at 110 0C, estimate length of the heated section and the rate of heat transfer from the tube to water. The thermo-physical properties of water are: rho = 971.6 kg/m3 ; μ = 0.355 x 10-3 kg/m-s; k = 0.667 W/m-deg; Cp = 4195 J/kg-deg. Use Nu = 0.023 (Re) 0.8 (pr) 0.4

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