Engineering, 06.05.2021 03:30 Naysa150724

A horizontal, thin-walled concentric tube heat exchanger of 0.19-m length is to be used to heat deionized water from 40 to 60°C at a flow rate of 5 kg/s. The deionized water flows through the inner tube of 30-mm diameter while saturated steam at 1 atm is supplied to the annulus formed with the outer tube of 60-mm diameter. The thermophysical properties of the deionized water are ? = 982.3 kg/m, GR-4181 J/kg-K, k = 0.643 w/m·K H 548 x 10 N. s/m, and Pr- 3.56. Estimate the convection coefficients for both sides of the tube and determine the inner tube wall outlet temperature. Does condensation provide a fairly uniform inner tube wall temperature equal approximately to the saturation temperature of the steam?

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A horizontal, thin-walled concentric tube heat exchanger of 0.19-m length is to be used to heat deio...