Isyfi, Afthon Ilman Huda (2015) Analisis kinerja sistem pengendalian pada heat exchanger dan steam condensate drum untuk proses pemanasan crude oil. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Heat Exchanger is an important facility in the petroleum industry
that serves to keep the temperature of the fluid output in the form of
crude oil production. Crude oil temperature greatly affect the efficiency
of the separation of oil and water in the downstream and associated
with the consumption of chemicals. The problems faced by the company
is a pressure control valve (PCV) opened manually by the operator to
the appropriate temperature set point of crude oil, as well as leveltemperature
cascade control does not work well because the crude oil
can't reach the set point. So in this research, which represents the
mathematical modeling of plant processes in the field using Ziegler-
Nichols tuning method. In a study conducted simulation feedback
control steam pressure and temperature cascade-level so that the needs
of steam to heat the crude oil can be offset by the control system.
Pressure feedback control system using a type PI control with a value of
settling time 300 second, IAE 406.5 and maximum overshoot 0%. In the
cascade control, condensate steam drum level control acts as a
secondary loop with PI control mode settling time obtained at 314.59
second, IAE 132.1 and maximum overshoot 28.38%, and the main loop
temperature control on the heat exchanger, with the best control mode is
PI mode with a value of settling time 284.94 second, IAE 42.3 and
maximum overshoot 1.42%.
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Heat Exchanger adalah fasilitas penting pada industri perminyakan
yang berfungsi untuk menjaga temperatur keluaran fluida produksi yang
berupa crude oil. Temperatur crude oil sangat berpengaruh terhadap
efisiensi separasi minyak dan air di bagian hilir dan berkaitan dengan
konsumsi bahan kimia. Permasalahan yang dihadapai perusahaan adalah
pressure control valve (PCV) dibuka secara manual oleh operator agar
temperatur crude oil sesuai set point, serta pengendalian cascade leveltemperatur
tidak bekerja dengan baik karena crude oil tidak dapat
mencapai set point. Maka dalam penelitian ini dilakukan pemodelan
matematis yang merepresentasikan plant proses di lapangan dengan
menggunakan metode penalaan Zieglers-Nichols. Dalam penelitian
dilakukan simulasi pengendalian umpan balik tekanan steam dan
cascade level-temperatur sehingga kebutuhan steam untuk memanaskan
crude oil dapat diimbangi oleh sistem pengendalian tersebut. Sistem
pengendalian umpan balik tekanan menggunakan tipe kontrol PI dengan
nilai settling time sebesar 300 detik, IAE sebesar 406,5 dan maximum
overshoot sebesar 0%. Pada pengendalian cascade, pengendalian level
steam condensate drum berperan sebagai loop sekunder dengan mode
kontrol PI didapatkan settling time sebesar 314.59 detik, IAE sebesar
132.1 dan maximum overshoot sebesar 28.38 %, dan loop utama yaitu
pengendalian temperatur pada heat exchanger, dengan mode kontrol
yang paling baik adalah mode PI dengan nilai settling time sebesar
284,94 detik, IAE sebesar 42,3 dan maximum overshoot sebesar 1,42%.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSF 621.402 5 Isy a |
| Uncontrolled Keywords: | Heat Exchanger, Steam Condensate Drum, Crude Oil, Cascade, Zieglers-Nichols |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Marsudiyana - |
| Date Deposited: | 13 Nov 2019 02:12 |
| Last Modified: | 13 Nov 2019 02:12 |
| URI: | http://repository.its.ac.id/id/eprint/71733 |
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