Dynamic Simulation and Liquid Level Control in A Pure Capacity System (2 Tanks in Series)

Hermawan, Yulius Deddy (2014) Dynamic Simulation and Liquid Level Control in A Pure Capacity System (2 Tanks in Series). In: The2st International Seminar on Fundamental & Application Of Chemical Engineering (ISFAChE) 2014, 12-13 November 2014, Bali, Indonesia.

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Abstract

The open loop experiment of pure capacity system for 2 liquid tanks in series has been successfully done in laboratory [Hermawan et.al, 2014]. Two square tanks were designed and arranged in series for investigation in laboratory. The water stream with its volumetric rate of fi(t) [cm3/min] was flowed to the 1st tank (Tank-1). The liquid in Tank-1 was then be pumped to the 2nd tank (Tank-2), with its volumetric rate of f1(t) [cm3/min]. The volumetric rate of f1(t) can be adjusted by changing the voltage of the pump, m(t) [volt]. This study has proposed the liquid level control configuration of the pure capacity system. In this work, the water volumetric rate of fi(t) was considered as a disturbance. The liquid level of Tank-1 h1(t) was kept constant by manipulating the voltage of the pump m(t). The output volumetric rate of Tank-2 f2(t) was chosen as a manipulated variable to control the liquid level of Tank-2 h2(t). The PI-only control was implemented in this system. The PI (Proportional-Integral) control parameters were tuned by trial and error. The controller gain (Kc) for liquid level control of Tank-1 (LC-1) was found -10 volt/cm, and for Tank-2 (LC-2) was -500 cm2/minute. The integral time (I) for LC-1 and LC-2 are 2 minute and 0.1 minute, respectively. In order to examine the control configuration, the input water volumetric rate disturbance (with amount of ±23%) was made based on step function. The closed loop dynamic simulation using computer programming has been done. The developed mathematical model of liquid level control in this system was solved numerically. Scilab software was chosen to examine such mathematical model. Integral of the absolute value of the error (IAE) for LC-1 and LC-2 were 11.4 and 7.8, respectively. This study revealed that the proposed control configuration with its tuning parameters gave a stable response to a change in the input water volumetric rate.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Closed Loop; Dynamic Simulation; Open Loop ; PI Control; Pure Capacity; Step Function.
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Dr Y. Deddy Hermawan
Date Deposited: 23 Sep 2016 01:44
Last Modified: 23 Sep 2016 01:44
URI: http://eprints.upnyk.ac.id/id/eprint/6616

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