Temperature Control in The R-101 Reactor with Comparing the Ziegler Nichols and Tyreus - Luyben Tuning Methods

Abstract

The R-101 reactor is one of the units in the Catalytic Condensation Unit (CCU), XXX Refinery. This reactor functions to reprocess the mixed C4 feed originating from the RCC Complex processing to have a higher selling value such as propylene and LPG. In this reactor, there is a polymerization reaction between the feed and the catalyst and exothermic heat transfer so that a series of control instrumentation is needed to maintain the temperature of the incoming feed at the reactor inlet. Temperature is a factor influencing conversion. The temperature control system in reactor R-101 is a series of cascade controls by temperature outlet heater E-102 with flow steam flowing in heater E-102. This control system will be more effective if the system response is stable, namely the shorter ascent and steady-state parameters, as well as the small overshoot value. One way to do this is by tuning the PID parameters of the controller. After tuning the PID parameters for temperature control in the Reactor R 101A, it can be seen that the response graph with the Ziegler Nichols method has the most stable response compared to the actual process response and the Tyreus -Luyben tuning method but still has the same delay time parameter of 90 seconds, the long incline and steady-state is 500 seconds, but the smallest overshoot is only 0.9%.

Perbandingan Tuning Menggunakan Metode Ziegler Nichols Dan Chien Regulator 2 Pada Production Separator

“…Dalam aplikasinya di lapangan, kontrol Proporsional Integral biasanya digunakan untuk mengontrol proses dengan dinamika yang relatif cepat seperti flow, pressure dan level. Penelitian telah menunjukkan bahwa hampir 80% dari pengontrol PID yang digunakan di industri beroperasi menggunakan kontrol PI [10]. Berikut persamaan kontrol PI yang telah di laplace [4] :…”

“…• T = waktu proses (process time constant) Untuk tujuan analisa dan perancangan (untuk kemudahan melakukan uji simulasi dengan Simulink), persamaan diferensial yang menggambarkan perilaku proses diatas secara umum dapat dipresentasikan kedalam bentuk fungsi alih proses dengan pers. (10) sebagai berikut :…”