Part of a biofuels refinery is shown in Figure 3. To answer the questions below, the following information should be of use: - The process is designed to operate at 100m3/hr. - The biofuel is predominantly ethanol, with a specific gravity of 0.80 . - The head/capacity curve for the feed pump is shown in Figure 4. - The pressure drop across each heat exchanger is 0.5 bar at design rate. - Assume a pressure drop across the lines of 1 bar/100 metres. - You can use the given scales as a rough approximation of length and height. These estimates do not need to be precise. - The pressure controls for towers T501 and T502 is not shown, but assume the pressures in these towers will not vary. - Assume the rundown line is 500 metres from the T502 level control valve to the storage tank a) From the above data, determine the Cv for each of the valves shown. You may use the following formula Cv=SGP1.17Q [20 marks] b) The inspection engineer has determined that the liquid velocities through the lines are excessive and may cause erosion at elbows and nozzles. A decision is made to replace all lines with lines four times the diameter. Does the T502 level control valve also need to be replaced? Explain your answer. [20 marks] Head-metres Part of a biofuels refinery is shown in Figure 3. To answer the questions below, the following information should be of use: - The process is designed to operate at 100m3/hr. - The biofuel is predominantly ethanol, with a specific gravity of 0.80 . - The head/capacity curve for the feed pump is shown in Figure 4. - The pressure drop across each heat exchanger is 0.5 bar at design rate. - Assume a pressure drop across the lines of 1 bar/100 metres. - You can use the given scales as a rough approximation of length and height. These estimates do not need to be precise. - The pressure controls for towers T501 and T502 is not shown, but assume the pressures in these towers will not vary. - Assume the rundown line is 500 metres from the T502 level control valve to the storage tank a) From the above data, determine the Cv for each of the valves shown. You may use the following formula Cv=SGP1.17Q [20 marks] b) The inspection engineer has determined that the liquid velocities through the lines are excessive and may cause erosion at elbows and nozzles. A decision is made to replace all lines with lines four times the diameter. Does the T502 level control valve also need to be replaced? Explain your answer. [20 marks] Head-metres