Water flows at 1 kg/s in a 10 mm diameter tube and is to be heated from 25 to 75 °C. The tube surface temperature is mai

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Water Flows At 1 Kg S In A 10 Mm Diameter Tube And Is To Be Heated From 25 To 75 C The Tube Surface Temperature Is Mai 1 (53.46 KiB) Viewed 63 times

Water flows at 1 kg/s in a 10 mm diameter tube and is to be heated from 25 to 75 °C. The tube surface temperature is maintained at 100 °C. Using the following properties for the water: p = 998 kg/m, Cp = 4171 J/kg K, k = 0.651 W/ mK, pb = 4.71 * 104 kg/m s, Uw = 2.82 x 104 kg/m s and Pr = 3.02. a) What is the required tube length for these conditions? [8 marks] b) To design a water heating system, consider using tube diameters in the range from 10 to 30 mm. What are the required tube lengths for water flow rate of 1 kg/s? Plot the tube length as a function of tube diameter. [9 marks] c) Plot the pressure gradient as a function of the tube diameter for the given water flow rate of 1 kg/s. Assume tube wall is smooth. [8 marks)