Studi Numerik Pengaruh Modifikasi Segmental Menjadi Helical Baffle Terhadap Kinerja Shell and Tube Heat Exchanger

Arif, Hanif (2024) Studi Numerik Pengaruh Modifikasi Segmental Menjadi Helical Baffle Terhadap Kinerja Shell and Tube Heat Exchanger. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Shell and Tube Heat Exchanger (STHX) adalah salah satu tipe alat penukar panas yang
paling umum digunakan di dunia industri. STHX tersusun atas beberapa komponen yang
berfungsi untuk mendukung proses perpindahan panas, salah satunya adalah baffle. Mayoritas
STHX yang dipakai saat ini di dunia industri memiliki komponen baffle, namun baffle yang
dipakai masih jenis konvensional, yaitu segmental baffle yang masih memiliki beberapa
kelemahan seperti pressure drop yang lumayan tinggi pada sisi shell, timbulnya dead zone
(bypass effect) dll nya. Terdapat 2 model helical baffle yang akan dianalisa dan dibandingkan
dengan model konvensional, yaitu middle overlapped dan continuous helical baffle. Dalam
penelitian ini agar lebih akurat dan memiliki perbandingan data yang cukup, penulis
menambahkan variasi mass flow rate inlet pada fluida sisi shell dan juga variasi fluida kerjanya,
yaitu water, feed gas, dan sulfuric acid. Hasil penelitian yang didapat setelah melakukan proses
studi numerik dengan CFD didapatkan, pada semua kondisi variasi fluida kerja helical baffle
terbukti mampu menaikkan kinerja heat exchanger. Nilai laju perpindahan panas paling baik
dihasillkan model STHX dengan continuous helical baffle yang mencapai 18170 Watt pada
variai fluida water to water. Selaras dengan itu, nilai U paling baik juga dicapai oleh model
STHX dengan continous helical baffle yakni sebesar 1056 W/m2
.K pada variasi fluida water to
water. Maka dari itu nilai efektifitas terbaik dicapai STHX dengan model continuous helical
baffle, yaitu sebesar 41,84% pada variasi fluida sulfuric acid-water. Sedangkan untuk
parameter pressure drop terbaik dicapai oleh model STHX dengan middle overlapped helical
baffle yang mampu menurunkan sebesar 75,51% dari yang dihasilkan model dengan segmental
baffle sebesar 330,81 Pa.=========================================================Shell and Tube Heat Exchanger (STHX) is one of the most used types of heat
exchangers in the industrial world. STHX is composed of several components that function to
support the heat transfer process, one of which is the baffle. The majority of STHX used today
in the industrial world has baffle components, but the baffles used are still conventional types,
namely segmental baffles which still have several weaknesses such as a high pressure drop on
the shell side, the emergence of dead zones (bypass effect) etc. There are 2 helical baffle models
that will be analyzed and compared with conventional models, namely middle overlapped and
continuous helical baffle. In this study to be more accurate and have sufficient data comparison,
the author adds variations in the inlet mass flow rate on the shell side fluid and variations in the
working fluid, namely water and feed gas. The research results obtained after conducting a
numerical study process with CFD are obtained, in the condition of the working fluid water
helical baffle is proven to be able to improve the performance of the heat exchanger. The best
heat transfer rate value is produced by the STHX model with continuous helical baffle which
reaches 18170 Watt in the water-to-water fluid variation. In line with that, the best U-value is
also achieved by the STHX model with continuous helical baffle which is 1056 W/m2. K in the
water-to-water fluid variation. Therefore, the best effectiveness value is achieved by STHX
with continuous helical baffle model, which is 41.84% in sulfuric acid-water fluid variation.
Meanwhile, the best pressure drop parameter is achieved by the STHX model with middle
overlapped helical baffle which can reduce by 75.51% from that produced by the model with
segmental baffle of 330.81 Pa.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	STHX, baffle, middle overlapped helical baffle, continuous helical baffle, heat duty, overall heat transfer coefficient, pressure drop, Computational Fluid Dynamic
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Hanif Arif
Date Deposited:	02 Aug 2024 07:54
Last Modified:	02 Aug 2024 07:54
URI:	http://repository.its.ac.id/id/eprint/111012

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