12.6. A vaporizer is required to evaporate 10,000kg/h of a process fluid, at 6 bar. The liquid is fed to the vaporizer at 20°C. The plant has a spare kettle reboiler available with the following specification. U-tube bundle, 50 tubes, mean length 4.8 m, end to end. Carbon steel tubes, inside diameter 25 mm, outside diameter 30 mm, square pitch 45 mm. Steam at 1.7 bara will be used for heating. Check if this reboiler would be suitable for the duty specified. Only check the thermal design. You may take it that the shell will handle the vapour rate. Take the physical properties of the process fluid as: liquid: density 535 kg/m³, specific heat 2.6kJkg -¹°C, thermal conductivity 0.094 W/m °C, viscosity 0.12 mN m ²s, surface tension 0.85 N/m, heat of vaporization 322 kJ/kg.

Applications and Investigations in Earth Science (9th Edition)
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ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
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12.6. A vaporizer is required to evaporate 10,000kg/h of a process fluid, at 6 bar. The liquid is fed to
the vaporizer at 20°C.
The plant has a spare kettle reboiler available with the following specification. U-tube
bundle, 50 tubes, mean length 4.8 m, end to end.
Carbon steel tubes, inside diameter 25 mm, outside diameter 30 mm, square pitch 45 mm.
Steam at 1.7 bara will be used for heating.
Check if this reboiler would be suitable for the duty specified. Only check the thermal
design. You may take it that the shell will handle the vapour rate.
Take the physical properties of the process fluid as: liquid: density 535 kg/m³, specific heat
2.6kJkg-¹°C, thermal conductivity 0.094 W/m °C, viscosity 0.12 mN m s, surface tension
0.85 N/m, heat of vaporization 322 kJ/kg.
Transcribed Image Text:12.6. A vaporizer is required to evaporate 10,000kg/h of a process fluid, at 6 bar. The liquid is fed to the vaporizer at 20°C. The plant has a spare kettle reboiler available with the following specification. U-tube bundle, 50 tubes, mean length 4.8 m, end to end. Carbon steel tubes, inside diameter 25 mm, outside diameter 30 mm, square pitch 45 mm. Steam at 1.7 bara will be used for heating. Check if this reboiler would be suitable for the duty specified. Only check the thermal design. You may take it that the shell will handle the vapour rate. Take the physical properties of the process fluid as: liquid: density 535 kg/m³, specific heat 2.6kJkg-¹°C, thermal conductivity 0.094 W/m °C, viscosity 0.12 mN m s, surface tension 0.85 N/m, heat of vaporization 322 kJ/kg.
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