A sugar solution (? = 1,080 kg/m3, cp = 3,601 J/kg ? K, kf = 0.5764...
A sugar solution (? = 1,080 kg/m3, cp = 3,601 J/kg ? K, kf = 0.5764 W/m ? K, ? = 1.3 × 10-3N ? s/m2) flows at rate of 2 kg/s and is to be heated from 25°C to 50°C. Water at 95°C is available at a flow rate of 1.5 kg/s (cp = 4,004 J/kg ? K). Sugar solution flows through the annulus. Designing a double-pipe heat exchanger for this process is proposed. The following geometrical parameters are assumed: Length of the hairpin = 3m. Do (annulus) = 6 cm Di (annulus) = 5.25 cm do (Inner tube) = 2.6 cm di (Inner tube) = 2.09 cm Number of tubes inside the annulus = 1 Number of fins = 20 Fin height = 0.0127 m Fin thickness = 0.0009 m Thermal conductivity of the material, k = 52 W/m ? K. a. Calculate the hydraulic diameter of the annulus for pressure drop analysis. b. Calculate the equivalent diameter for heat transfer analysis. c. Calculate the heat transfer surface area of this heat exchanger and the number of hairpins.
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A sugar solution (? = 1,080 kg/m3, cp = 3,601 J/kg ?
K, kf = 0.5764...
2.- Hot oil (Cp = 2200 J/kg °C) is to be cooled by water (Cp =...
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