Problem 08.107 - Concentric annulus tube length A concentric annulus tube has inner and outer diameters of 25 mm and 100

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Problem 08 107 Concentric Annulus Tube Length A Concentric Annulus Tube Has Inner And Outer Diameters Of 25 Mm And 100 1 (32.64 KiB) Viewed 23 times

Problem 08.107 - Concentric annulus tube length A concentric annulus tube has inner and outer diameters of 25 mm and 100 mm, respectively. Liquid water flows at a mass flow rate of 0.03 kg/s through the annulus with the inlet and outlet mean temperatures of 20°C and 80°C, respectively. The inner tube wall is maintained with a constant surface temperature of 120°C, while the outer tube surface is insulated. Determine the length of the concentric annulus tube. Assume flow is fully developed. Water Insulation The properties of water at Tb=(Ti+ Tel/2 = 50°C are: Cp=4181 J/kg-K k 0.644 W/m K u=0.547 x 10-3 kg/m-s Pr = 3.55 The length of the concentric annulus tube is m.