b) Use MSExcel spreadsheet for the following calculations: (10+10+10= 30 MARKS) Use the AspenPlus simulation data...

 

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b) Use MSExcel spreadsheet for the following calculations: (10+10+10= 30 MARKS) Use the AspenPlus simulation data obtained for the column bottom stage (plate) conditions to design the sieve plate. You may use the following initial values for the plate design. If these values are not suitable, choose appropriate values and complete the design. You must complete these calculations using a spreadsheet. 1. Liquid flow on the plate = cross-flow 2. Hole diameter = Plate thickness = 5 mm 3. Weir height = 50 mm 4. Tray spacing = 0.5 m 5. Hole area 12% of active tray area 6. Segmental downcomer area = 12% of column cross-sectional area 7. Turn-down ratio = 70% 8. Calming zone width = Unperforated edge strip width = 50 mm i. Estimate the column diameter taking that the actual vapour velocity is 78% of the flooding velocity. pressure drop at the bottom plate and compare it to the pressure drop obtained from AspenPlus simulation (the two pressure drop values need not match). ii. Check for weeping and liquid entrainment conditions whether the tray spacing is satisfactory or not iii. Prepare a plate layout and calculate the total perforated area number of holes hole pitch Include a diagram of the plate layout showing the dimensions such as the plate diameter, calming zone and unperforated strip edge widths, and overflow weir length. b) Use MSExcel spreadsheet for the following calculations: (10+10+10= 30 MARKS) Use the AspenPlus simulation data obtained for the column bottom stage (plate) conditions to design the sieve plate. You may use the following initial values for the plate design. If these values are not suitable, choose appropriate values and complete the design. You must complete these calculations using a spreadsheet. 1. Liquid flow on the plate = cross-flow 2. Hole diameter = Plate thickness = 5 mm 3. Weir height = 50 mm 4. Tray spacing = 0.5 m 5. Hole area 12% of active tray area 6. Segmental downcomer area = 12% of column cross-sectional area 7. Turn-down ratio = 70% 8. Calming zone width = Unperforated edge strip width = 50 mm i. Estimate the column diameter taking that the actual vapour velocity is 78% of the flooding velocity. pressure drop at the bottom plate and compare it to the pressure drop obtained from AspenPlus simulation (the two pressure drop values need not match). ii. Check for weeping and liquid entrainment conditions whether the tray spacing is satisfactory or not iii. Prepare a plate layout and calculate the total perforated area number of holes hole pitch Include a diagram of the plate layout showing the dimensions such as the plate diameter, calming zone and unperforated strip edge widths, and overflow weir length.