A shell-and-tube condenser with horizontal 7/8-in BWG 16 copper tubes is used to condense benzene vapor. The vapor is condensed at atmospheric pressure, it’s enthalpy of vaporization is around 394 KJ/kg, and the thermal conductivity at the reference temperature is around 0.150 W/m.°C. Assume the cooling water average temperature to be 40°C and neglect the tube and water film resistances. a)Calculate the reference temperature Tf and evaluate the liquid properties at this temperature. You may use the textbook and/or Perry’s Chemical Engineers’ Handbook. b)Estimate the film coefficient for the top row of tubes (W/m2.°C). c)Estimate the average coefficient for a stack of 10 tubes (W/m2.°C).
A shell-and-tube condenser with horizontal 7/8-in BWG 16 copper tubes is used to condense benzene vapor. The vapor is condensed at atmospheric pressure, it’s enthalpy of vaporization is around 394 KJ/kg, and the thermal conductivity at the reference temperature is around 0.150 W/m.°C. Assume the cooling water average temperature to be 40°C and neglect the tube and water film resistances.
a)Calculate the reference temperature Tf and evaluate the liquid properties at this temperature. You may use the textbook and/or Perry’s Chemical Engineers’ Handbook.
b)Estimate the film coefficient for the top row of tubes (W/m2.°C).
c)Estimate the average coefficient for a stack of 10 tubes (W/m2.°C).
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