Purnomo, Muhammad Andro (2019) Desain Plantwide Control pada Cryogenic Gas Separation Process Dengan Menggunakan Turboexpander. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kualitas yang maksimal dalam suatu produksi merupakan hal yang utama bagi suatu perusahaan. Proses pengolahan gas untuk memisahkan komposisi produk disebut proses fraksinasi. Pada industri gas, bagian khusus untuk melakukan proses tersebut disebut liquefied petroleum gas facility plant (LPGF). Proses fraksinasi gas yang terjadi pada temperatur yang rendah disebut sebagai cryogenic gas separation process. Performansi turboexpander sangat memengaruhi kualitas produk dari proses fraksinasi yang terjadi. Plantwide control adalah desain struktur dan strategi kontrol untuk pabrik secara keseluruhan. Strategi kontrol pada tugas akhir ini adalah PID untuk regulatory control dan MPC untuk supervisory control serta real time optimizer untuk optimisasinya. Plantwide control dapat meningkatkan profit dan menghemat energi pada proses hingga 184.39 U$/jam dan 177492 kJ/jam ketika diberikan gangguan kenaikan 5% feed serta 89.49 U$/jam dan 99589.8 kJ/jam ketika diberikan gangguan penurunan 5% feed. Penerapan plantwide control pada cryogenic gas separation process di LPGF juga mampu menghasilkan respon sistem yang stabil ketika diberi gangguan berupa perubahan laju aliran feed. Hal ini ditunjukkan dengan penurunan settling time dan maximum overshoot serta menghilangkan error steady-state.
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Maximum quality in a production is the main aim of a company. The gas processing process to separate the composition of the product is called the fractionation process. In the gas industry, a specific part of the process is called liquefied petroleum gas facility plant (LPGF). The gas fractionation process that occurs at a low temperature is called cryogenic gas separation process. Turboexpander performance greatly influences product quality from the fractionation process. Plantwide control is a structural design and control strategy for the whole plant. The control strategy in this final project is PID for regulatory control and MPC for supervisory control, also real time optimizer for the optimization. Plantwide control can increase profits and save energy in the process up to 184.39 U$/hour and 177492 kJ/hour when given a 5% increase in feed and 89.49 U$/hour and 99589.8 kJ/hour when given a 5% decrease in feed. The application of plantwide control to the cryogenic gas separation process in LPGF is also able to produce a stable system response when given a disturbance in the form of a change in feed flow rate. This is indicated by a decrease in settling time and maximum overshoot also eliminate steady-state error.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Plantwide Control, Turboexpander, Kestabilan |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ213 Automatic control. T Technology > TJ Mechanical engineering and machinery > TJ222 Supervisory control systems. T Technology > TJ Mechanical engineering and machinery > TJ223 PID controllers |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Andro Purnomo |
| Date Deposited: | 13 Nov 2024 05:43 |
| Last Modified: | 13 Nov 2024 05:43 |
| URI: | http://repository.its.ac.id/id/eprint/68455 |
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