Optimisasi Kondisi Operasi dan Plantwide Control pada Plant LNG

Iballe, thareq (2019) Optimisasi Kondisi Operasi dan Plantwide Control pada Plant LNG. Other thesis, Institut Teknologi Sepuluh nopember.

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Abstract

Penggunaan energi hidrokarbon saat ini masih sangat dominan, dimana energi hidrokarbon yang paling efisien adalah gas alam. dimana pada tahap ini natural gas yang telah dihilangkan kandungan air, merkuri serta CO2 nya dan setelah melalui proses fractination yang terdiri dari empat pemisahan yaitu methane, ethane, propane dan butane. LNG plant terdiri dua tahap precooling yaitu siklus propane dan MCR sehingga pengendalian proses plant yang kompleks dibutuhkan dalam menyelesaikan permasalahan ini. Perancangan desain plantwide control (PWC) pada LNG berhasil menyelesaikan permasalahan tersebut, terbukti dengan adanya analisis dampak dari sisi energi, ekonomi dan dari kestabilan plant. Metode PWC yang digunakan menurunkan metode milik Luyben dan Skogestad. Hasil perancangan PWC pada kenaikan feed 5% mampu menurunkan penggunaan energi sebesar 143762.47 kJ perjam dan mampu meningkatkan profit sebesar 1774.60 USD perhari sedangkan pada penurunan feed sebesar 5% mampu menurunkan penggunaan energi sebesar 200000 kJ perjam dan mampu meningkatkan profit sebesar 1579.13 USD perhari. Penerapan PWC juga dapat menghasilkan respon sistem yang stabil saat dilakukan uji gangguan dibuktikan dengan settling time dan overshoot yang menurun serta eror steady state yang hilang dibandingkan dengan pengendalian PID saja sebelum dilakukan perancangan PWC.
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The use of hydrocarbon energy is still very dominant, where the most efficient hydrocarbon energy is natural gas. where at this stage natural gas has been removed from the water, mercury and CO2 content and after going through the fractination process which consists of four separations namely methane, ethane, propane and butane. The LNG plant consists of two precooling stages namely the propane cycle and the MCR so that complex plant process control is needed to solve this problem. Plantwide control (PWC) design on LNG successfully resolves these problems, as evidenced by the impact of energy, economic and plant stability analysis. The PWC method used decreases the method of Luyben and Skogestad. The results of the PWC design on a 5% feed increase were able to reduce energy use by 143762.47 kJ per hour and were able to increase profit by 1774.60 U $ per day while the 5% decrease in feeds was able to reduce energy use by 200000 kJ per hour and increase profit by 1579.13 U $ per day The application of PWC can also produce a stable system response when a disturbance test is proved by settling time and overshoot which decreases and the steady state error is lost compared to PID control only before the PWC design is done.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Plantwide control, energi, profit
Subjects:	T Technology > TP Chemical technology > TP350 Natural gas--Drying.
Divisions:	Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Mr. thareq fasya iballe
Date Deposited:	13 Nov 2024 02:03
Last Modified:	13 Nov 2024 02:03
URI:	http://repository.its.ac.id/id/eprint/69935

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