Sabillah, Muhammad Gikano (2019) Prediksi Reliability dan Safety pada Heat Exchanger Network Crude Distillation Unit (CDU) berdasarkan Kondisi Operasi dan Korelasi Properti Fluida. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Heat Exchanger (HE) di kilang minyak mentah Exchanger
Network (HEN) memiliki fungsi penting untuk memulihkan
panas dari produk dan mentransfernya ke minyak mentah
sebelum dikirim ke tungku dan kolom destilasi. Keandalan
operasi unit ini harus dijaga dengan baik untuk mencegah
kejadian bahaya dan penutupan yang tidak terjadwal. Dalam
banyak kasus, kegagalan pada heat exchaner disebabkan oleh
terbentuknya fouling yang membuat kinerja heat exchanger tidak
optimal. Selain itu, fouling menyebabkan shutdown yang tidak
terjadwal untuk menghindari kondisi yang tidak aman karena
tingginya penurunan tekanan. Agar keandalan dan keamanan
operasi dapat terjaga maka kegagalan dari sisi hidrolik ataupun
thermal harus di prediksi. Model kenaikan pembentukan fouling
harus di prediksi. Model kenaikan fouling rate menggunakan
model linear, non-linear dan sigmoidal. Dengan kecepatan
sampling dan waktu rentang waktu pengukuran yang sesuai, laju
kenaikan fouling berbentuk sigmoidal. Hasil perhitungan
pressure drop dan coefficient heat transfer didapatkan
pembentukan endapan tidak tergantung dari fouling resisstance
saja, konduktifitas thermal (kf) berpengaruh terhapa ketebalan
endapan yang terbentuk. Kf fouling setiap heat exchanger
berbeda-beda. Endapan yang terbentuk menyebabkan hambatan
aliran fluida dan luasan heat transfer bertambahn besar. Dimana
hal itu menyebabkan naiknya pressure drop dan turunya
coefficient heat transfer (U). Reliability dapat dilihat dari
turunnya nilai U dan safety dapat dilihat dari kenaikan nilai
pressure drop. Dengan berpacuan pada batas pressure drop yang
diperbolehkan sesuai desain, nilai reliability dan safety dapat di
xii
prediksi. Nilai relibility setiap heat exchanger sebesar
0,5;0,16;0,15;0,25;0,14;0,17;0,45;0,22;0,19;0,28;0,21.
=========================================================
The Heat Exchanger (HE) at the Exchanger Network (HEN)
crude oil refinery has an important function to recover heat from
the product and move it to crude oil before being sent to the
furnace and distillation column. The operating unit must be
properly guarded to prevent hazard events and unscheduled
schedules. In many cases, failure of the heat exchanger is caused
by the formation of deposits (fouling) which makes the heat
exchanger's performance not optimal. In addition, fouling causes
unscheduled shutdown to avoid unsafe conditions due to
pressure fluctuations. In order to be reliable and the security of
the operation can be solved from the hydraulic or thermal side it
must be predicted. The model of winning fouling must be
predicted. The fouling rate increase model uses a linear, nonlinear and sigmoidal model. With the sample speed and the
appropriate time span, the speed of fouling rises to form
sigmoidal. The results of the calculation of pressure drop and the
heat transfer coefficient obtained do not depend on just
impurities, thermal conductivity (kf) collected due to the
thickness of the precipitate formed. The fouling kf of each heat
exchanger is different. The precipitate formed causes fluid
displacement and broad heat transfer. Where it causes an
increase in pressure drop and the associated heat transfer
coefficient (U). Reliability can be seen from the decrease in U
value and safety can be seen from the increase in the value of
pressure drop. With pressure drop pressure allowed according
to the design, the value of reliability and safety can be predicted.
The reliability value of each heat exchanger is 0.5; 0.16; 0.15;
0.25; 0.14; 0.17; 0.45; 0.22; 0.19; 0.28; 0.21.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Heat Exchanger, Pressure Drop, Coefficient Heat Transfer, Reliability and Safety |
| Subjects: | T Technology > TS Manufactures > TS174 Maintainability (Engineering) . Reliability (Engineering) |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Sabillah Muhammad Gikano |
| Date Deposited: | 13 Nov 2024 06:50 |
| Last Modified: | 13 Nov 2024 06:50 |
| URI: | http://repository.its.ac.id/id/eprint/68451 |
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