Rahmadani, Febianti Amira (2017) Optimasi Kondisi Operasi Untuk Mengurangi Fouling Pada Heat Exchanger Di Residual Fluid Catalytic Cracking Unit (RFCC) PT. Pertamina (Persero) RU IV - Cilacap. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Peralatan mekanik dengan kinerja tinggi, seperti heat exchanger, saat ini menjadi elemen penting bagi industri di seluruh dunia dimana kegagalan yang terjadi dapat menyebabkan kerugian bagi industri terkait. Kegagalan utama yang terjadi disebabkan karena adanya fouling. Fouling pada heat exchanger dapat berdampak negatif sehinga perlu adanya metode yang tepat untuk mengurangi dampak negatif dari fouling tersebut. Salah satu metode yang dapat digunakan yaitu mengubah variabel-variabel kondisi operasi yang terdiri dari flowrate serta temperatur keluaran pada sisi shell dan tube. Untuk mendapatkan variabel-variabel kondisi operasi yang maksimal sehingga fouling dapat berkurang maka diperlukan optimasi. Pada Tugas Akhir ini, metode optimasi yang digunakan yaitu evolution strategis. Adapun mekanisme optimasi dengan evolution strategis, yaitu mengurangi flowrate steam pada sisi shell dan menambah temperatur keluaran pada sisi shell sehingga kecepatan dan waktu tinggal steam di dalam heat exchanger semakin lama. Jika waktu tinggal steam semakin lama maka proses perpindahan panas antar fluida semakin baik. Jika proses perpindahan panas antar fluida semakin baik maka fouling yang terbentuk semakin kecil dan efisiensi heat exchanger semakin baik. Pada Tugas Akhir ini menggunakan heat exchanger dengan tag number 101-E-527B di unit RFCC PT. PERTAMINA RU-IV Cilacap. Setelah dilakukan optimasi dengan menggunakan evolution strategis pada heat exchanger tersebut maka didapatkan rata-rata fouling resistance sebesar 4,56.10-4 m2.C/W dan rata-rata efisinesi sebesar 89,73%.
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Mechanical equipment with high performance, such as heat exchangers, is now becoming an essential element for the worldwide industry where the failures of heat exchanger can cause disadvantage for the industry. The main failures of heat exchanger is fouling. Fouling in the heat exchanger have a negative impact so it needs a method for mitigation the negative impacts. One of method that can be used is changing variables operating conditions, such as flowrate and temperature out side of the shell and tube side. To get the maximum variabels and reduced the fouling, it required to optimization. In this final project, optimization methods used evolution strategis algorithm. The mechanism of evolution strategis algorithm for optimization is reducing the flowrate of steam on the shell side and increase the output temperature on the shell side so the steam velocity and residence time in the heat exchanger is getting long. If the residence time of steam is longer so the heat transfer process between two fluids is getting better. If the heat transfer of fluids is better so fouling in the heat exchanger is smaller and the efficinecy of the heat exchanger is better. In this final project using a heat exchanger with the tag number 101-E-527B in RFCC unit PT. PERTAMINA RU-IV Cilacap. After optimization using evolution strategis algorithm, then the heat exchanger obtained an average fouling resistance is 4,56.10-4 m2.C / W and average efficiency is 89.73%.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Heat exchanger; fouling; evolution strategis |
| Subjects: | T Technology > T Technology (General) > T56.8 Project Management |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | FEBIANTI AMIRA RAHMADANI |
| Date Deposited: | 17 Apr 2017 03:41 |
| Last Modified: | 08 Mar 2019 06:35 |
| URI: | http://repository.its.ac.id/id/eprint/3616 |
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