ASAP

Post by **answerhappygod** » Fri May 20, 2022 8:35 pm

ASAP

: Asap 1 (134.04 KiB) Viewed 27 times

Parameters V 98(t) 9t) Bmax Amax 98 Description Tank volume Base volumetric flow rate Acid volumetric flow rate Maximum base volumetric flow rate Maximum acid volumetric flow rate Steady State base volumetric flow rate Steady state acid volumetric flow rate Steady state output volumetric flow rate Maximum Steady State base volumetric flow rate Unit Meters3 Meters/Second Meters/Second Meters/Second Meters3/Second Meters/Second Value 10 5 x 10-3 5 x 10-3 5 x 10-3 25 x 10-4 5 x 10-3 qA Meters/Second 5 x 10-3 q* Meters/Second 10-2 98max Meters/Second 5 x 10-3 Amax Meters/Second 25 x 10-4 СЕ Moles/Liter -10 CA Maximum Steady State acid volumetric flow rate Steady state base feed concentration Steady state acid feed concentration Excess acid concentration Maximum excess acid concentration Moles/Liter 10 C(t) Cmax Moles/Liter Moles/Liter 10-6

* is used to denote steady-state values, and q* = CĂ + CB C' = 10-pH – 10-14+pH CA = CHA - COHA = – and CB = CH – Coh,B Scaled variables for the input are introduced for the input, output and the disturbance as follows = 9A(t) 98(t) y(t) = C(t) Стах ; d(t) = WAmax i u(t) Явтах Tasks 1) Explain how the performance of pH level control system can be compliant with environmental regulations and the treatment of wastewater. examples to explain the importance of a stable pH and its role in minimizing pollution in our ecosystem. [5 Marks] 2) For a neutral pH = 7, using Laplace transforms and assuming zero initial conditions, show that THCS y(s) 1 TCA - C* Tamax CB - C* 9Bmax d(s) + ST + 1 q* Стах q* Cmax - us) where the time constant is T = V/q*. [7 Marks]

3) Construct a block diagram depicting an open loop arrangement for the signals and transfer functions defined in 2). [3 Marks] 4) Assume zero initial conditions and a step input with magnitudes a and ß for each of à(s) and ū(s) respectively. Find the concentration output y(t). [10 marks] 5) Using MATLAB, produce a unit step response for the output y(t) and verify the result by comparing it with the analytical result derived in 4). Select the time scales so that both the transients and the steady state output are visible. [10 marks] 6) Assuming d(s) = 0, specify the parameter values that needs to be changed for the speed of the response to increase. Explain and justify your reasoning using appropriate mathematical functions and step response plots? [5 marks]