Desain Plantwide Control pada Acid Gas Removal Unit Liquified Natural Gas Plant Menggunakan Model Predictive Control

Musalim, Rakan Akmal (2024) Desain Plantwide Control pada Acid Gas Removal Unit Liquified Natural Gas Plant Menggunakan Model Predictive Control. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kebutuhan energi tiap tahunnya selalu mengalami peningkatan, dimana minyak dan gas bumi masih menjadi komoditi energi yang utama dan penting bagi kehidupan manusia. Seiring dengan perkembangan zaman, upaya upaya terkait dengan optimalisasi proses produksi pada proses pembuatan Liquified Natural Gas selalu ditingkatkan. Salah satu tahapan penting pada proses pembuatan LNG adalah Acid Gas Removal Proses untuk membuang zat kotor seperti CO2 dan H20 pada gas alam. Dalam prosesnya sumber berupa laju produksi gas alam yang tidak stabil dapat menyebabkan proses pada Acid Gas Removal tidak stabil dan dapat mengakibatkan efek snowball dalam plant. Oleh karena itu diperlukan pengendalian yang lebih kompleks yang dapat terintegrasi satu dengan yang lainnya. Metode dalam tugas akhir ini adalah penerapan plantwide control dengan menggunakkan Model Predictive Control sebagai lapisan supervisory control dimana nantinya desain perancangan PWC akan diterapkan pada saat terjadi disturbance berupa laju aliran massa sour gas feed +- 5%. Hasil perancangan Plantwide control terbukti mampu meningkatkan performansi dari pengendalian yang ada pada plant dengan indikator paramater performansi seperti Settling Time, Maximum Oveershoot, Error Steady State dan Integral Absolute Error. Pada disturbance naik 5% dapat menghemat sekitar 7.85% penggunaan energi atau dalam sisi ekonomi, dapat menghemat sekitar Rp107,266,253.12 Per- harinya. Sedangkan pada disturbance turun 5%, penggunaan PWC dapat menghemat sekitar 5.54 %. Dimana jika dikonversikan dalam sisi ekonomi, akan terjadi penghematan sekitar Rp69,246,870.28 Per-harinya.
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The Energy needs for human activities always increase every year, where oil and natural gas are still the main and important energy commodities. As time goes by, efforts related to optimizing the production process in the process of making Liquified Natural Gas are always being improved. One of the important stages in the LNG Plant process is the Acid Gas Removal Unit. The process for removing dirty substances such as CO2 and H20 from natural gas. In the process, the source or the feed in the form of a natural gas rate can cause the Acid Gas Removal process to be unstable and can result in a snowball effect in the plant. Therefore, more complex controls are needed that can be integrated with each other. The method in this final project is the application of plantwide control using a Predictive Control Model as supervisory control which will later be applied when there is a mass flow rate disturbance of sour gas of +- 5%. The results of the Plantwide control design were proven to be able to improve the performance of existing controls in the plant with performance parameter indicators such as Settling Time, Maximum Overshoot, Steady State Error, and Integral Absolute Error. If the disturbance increases by 5%, it can save around 7.85% of energy usage or from an economic perspective, it can save around IDR Rp107,266,253.12 per day. Meanwhile, when interference decreases by 5%, the use of PWC can save around 5,54%. Where if converted into an economic perspective, there will be savings of around IDR Rp69,246,870.28 per day.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Acid Removal Unit, Gas Processing, Model Predictive Control, Plantwide Control, Pembuangan Gas Asam, Pemrosesan Gas, Model Predictive Control, Plantwide Control.
Subjects:	T Technology > T Technology (General) > T57.62 Simulation T Technology > T Technology (General) > T57.83 Dynamic programming T Technology > TP Chemical technology > TP155.5 Chemical plants--Design and construction T Technology > TP Chemical technology > TP155.7 Chemical processes.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Rakan Akmal Musalim
Date Deposited:	31 Jul 2024 02:40
Last Modified:	31 Jul 2024 02:40
URI:	http://repository.its.ac.id/id/eprint/110747

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