Water is heated from 10° C to 80° C as it flows through a 2 cm ID and 13 m long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so in steady operation all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of 5 L/min. Use the properties of saturated water at the mean fluid temperature of 45° C as given below: rho = 990.10 kg/m^3, C_p = 4180 J/kg.K, k = 0.637 W/m.K, μ = 0.596×10^(-3) kg/m.s.
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Water is heated from 10° C to 80° C as it flows through a 2 cm ID and 13 m long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so in steady operation all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of 5 L/min. Use the properties of saturated water at the mean fluid temperature of 45° C as given below: rho = 990.10 kg/m^3, C_p = 4180 J/kg.K, k = 0.637 W/m.K, μ = 0.596×10^(-3) kg/m.s.
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