Optimisasi Desain Plantwide Control pada Kolom Depropanizer dan Debutanizer Liquefied Petroleum Gas Plant Menggunakan Model Predictive Control

Asrafi, Khairul Amri Nur (2024) Optimisasi Desain Plantwide Control pada Kolom Depropanizer dan Debutanizer Liquefied Petroleum Gas Plant Menggunakan Model Predictive Control. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Saat ini, pertumbuhan jumlah penduduk dunia meningkat pesat yang menyebabkan kebutuhan energi di dunia juga semakin meningkat. Dengan meningkatnya kebutuhan energi ini maka berdampak pada meningkatnya kebutuhan akan energi fosil. Energi fosil berupa minyak bumi sudah banyak berdampak pada kerusakan lingkungan sehingga dibutuhkan suatu energi alternatif, yaitu energi gas alam yang ramah lingkungan. Gas alam merupakan sumber energi fosil yang paling bersih dan menghasilkan emisi karbon yang rendah. Salah satu penerapan energi gas alam adalah pada Liquefied Petroleum Gas (LPG). Pada pengolahan LPG, proses yang digunakan untuk memisahkan komposisi produk adalah proses fraksinasi. Proses fraksinasi pada LPG plant dilakukan dengan beberapa tahapan, yaitu tahapan kolom demethanizer, deethanizer, depropanizer, dan debutanizer. Namun, proses ini membutuhkan energi yang besar sehingga menyebabkan biaya produksi yang meningkat. Oleh karena itu, pada proses ini dibutuhkan suatu pengendalian proses menggunakan metode plantwide control (PWC) dengan lapisan regulatory control dan supervisory control, serta dengan pengendali model predictive control (MPC) untuk menjaga kestabilan plant, mengurangi penggunaan energi, dan meningkatkan profit ekonomi. Desain PWC yang diterapkan pada LPG plant berhasil menjaga kestabilan sistem yang ditunjukkan dengan penurunan pada nilai maximum overshoot, settling time, ESS, dan IAE saat diberikan gangguan pada feed. Berdasarkan aspek penggunaan energi maka penerapan PWC dapat mengurangi penggunaan energi sebesar 310.36 kWh saat feed naik dan sebesar 300.95 kWh saat feed turun. Berdasarkan penghematan energi tersebut maka mampu meningkatkan profit ekonomi sebesar 71,834,900 IDR/h saat feed naik dan 61,107,533 IDR/h saat feed turun setelah diterapkannya metode PWC pada LPG plant.
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Currently, the rapid growth in the world population is causing a significant increase in global energy demand. This growing demand for energy impacts the increased need for fossil fuels. Fossil fuel energy, particularly crude oil has significantly damaged the environment making it necessary to seek an alternative energy source, namely natural gas which is environmentally friendly. Natural gas is the cleanest fossil fuel and produces low carbon emissions. One application of natural gas energy is in Liquefied Petroleum Gas (LPG). In LPG processing, the process used to separate product compositions is fractionation. The fractionation process in an LPG plant involves several stages, specifically the demethanizer, deethanizer, depropanizer, and debutanizer columns. However, this process requires significant energy leading to increased production costs. Therefore, this process requires a process control using the plantwide control (PWC) method with regulatory control and supervisory control layers, as well as with model predictive control (MPC) controllers to maintain plant stability, reduce energy use, and increase economic profit. The PWC design implemented in the LPG plant successfully maintains system stability, as shown by reductions in maximum overshoot, settling time, ESS, and IAE values when feed disturbances occur. Regarding energy usage, the PWC application can reduce energy consumption by 310.36 kWh when the feed increases and by 300.95 kWh when the feed decreases. This energy saving can increase economic profit by 71,834,900 IDR/h when the feed increases and by 61,107,533 IDR/h when the feed decreases after applying the PWC method to the LPG plant.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Optimization, LPG Plant, Plantwide Control, Model Predictive Control, Optimization, LPG Plant, Plantwide Control, Model Predictive Control
Subjects:	T Technology > T Technology (General) > T11 Technical writing. Scientific Writing T Technology > T Technology (General) > T57.62 Simulation T Technology > T Technology (General) > T57.83 Dynamic programming
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Khairul Amri Nur Asrafi
Date Deposited:	01 Aug 2024 02:53
Last Modified:	01 Aug 2024 02:53
URI:	http://repository.its.ac.id/id/eprint/109564

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