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In a food processing plant there is a requirement to cool 80,000 kg/h of the extraction solvent from 85°C to 50°C. Cooli
Posted: Fri May 27, 2022 7:55 am
by answerhappygod
- In A Food Processing Plant There Is A Requirement To Cool 80 000 Kg H Of The Extraction Solvent From 85 C To 50 C Cooli 1 (66.66 KiB) Viewed 23 times
In a food processing plant there is a requirement to cool 80,000 kg/h of the extraction solvent from 85°C to 50°C. Cooling water is available at 28°C and the maximum temperature rise is 15°C. As a newly joined process engineer, you are assigned to perform a thermal design for a shell and tube heat exchanger using Kern's method. You may ignore the pressure drop at this stage. Material of construction is carbon steel. Some advices from your senior process engineer are: 1. Cooling water is more corrosive compared to the extraction solvent. 2. Use initial estimate of 600W/m². °C for overall coefficient. 3. Use 1 shell pass with 2 tube passes. 4. Choose tube with 20mm od, 16mm id and 4.88m long. Take into consideration of tube-sheet thickness, tube effective length is 4.83m. 5. Triangular tube patterns is preferred 6. Recommended bundle diametrical clearance is 60mm 7. Recommended 25 percent baffle cut 8. Thermal conductivity for carbon steel is 54 W/m.°C Table Q4: Physical properties of the hot and cold fluid Properties Water Extraction Solvent 740 Density, kg/m³ 992 4.179 2.5 Specific Heat Capacity, kJ/kg. C Viscosity, mNs/m² 0.8 0.32 0.59 0.18 Thermal Conductivity, W/m.°C Fouling Coefficient, W/m². °C 3000 5000