Gonawan, Enrico kevin (2015) Retrofit Exchanger Network (HEN) Melalui Overall Heat Transfer Coeficient dengan Menggunakan Metode Genetic Algoritm. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Heat recovery dilakukan untuk membantu mengurangi
penggunaan energi dan menyediakan panas untuk digunakan pada
proses lainnya. Heat recovery dapat dilakukan pada berbagai macam
alat kerja yang membutuhkan panas, salah satunya adalah heat
exchanger (HE). Heat exchanger network (HEN) merupakan susunan
beberapa HE yang saling berhubungan, yang digunakan untuk
melakukan heat recovery. Retrofit HEN dapat meningkatkan heat
recovery pada proses yang ada. Pada penelitian ini, retrofit HEN
dilakukan dengan mencari besar panas (Q) yang maksimal tanpa
mengubah luas heat transfer atau menambah HE baru dan mengubah
susunan HE pada HEN, sehingga didapatkan besar heat recovery yang
maksimum. Metode genetic algorithm (GA) digunakan untuk mencari
nilai U yang optimal. Pada penelitian ini sebanyak tiga skenario
optimasi dilakukan dengan memberikan beberapa batasan-batasan pada
model HEN yang digunakan. Pada optimasi skenario pertama, besar
peningkatan U tidak diberikan batasan maximum dan minimum.
Sedangkan pada optimasi skenario kedua, peningkatan U tidak diberikan
batasan maximum, tetapi diberikan batasan nilai minimum yaitu nilai U
pada data desain. Dan pada optimasi skenario ketiga, besar peningkatan
U diberikan batasan teknologi, yaitu teknologi internal fins, twisted tape
insert, coiled wire insert, dan helical baffle. Besar heat recovery pada
optimasi skenario pertama sebesar 13.21%, pada optimasi skenario
kedua sebesar 9.14%, dan pada optimasi skenario ketiga sebesar 3.60%
dengan batasan teknologi internal fin, 2.77% dengan batasan teknologi
twisted tape inserts, 7.69% dengan teknologi coiled wire insert, dan
4.61% dengan teknologi helical baffle.
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Heat recovery is done to help reduce energy use and provide heat
for use in other processes. Heat recovery can be performed on a wide
variety of work tools that require heat, one of which is a heat exchanger
(HE). Heat exchanger network (HEN) is an arrangement of several
interconnected HE, which is used to conduct heat recovery. HEN retrofit
can increase the heat recovery in existing processes. In this study, HEN
retrofit is done by finding the maximum heat (Q) without changing the
area of heat transfer or adding new HE and the arrangement of HE in
HEN to obtain maximum heat recovery. Genetic algorithm (GA) is used
to find the optimal U value. In this study, three case of scenarios
optimization is done by giving some constraints on the HEN model. In
the first case scenario optimization, the improvement of U is not given
the maximum and minimum limits. While in the second case scenario
optimization, the maximum improvement limit of U is not given, but has
the minimum value, that is the value of U on the design data. And on the
third case scenario optimization, U has limits of technology, which is the
increase in the maximum of U using internal fins, twisted tape insert,
coiled wire insert, and helical baffle. Heat recovery obtained in the first
case scenario optimization results at 13.21%, whereas the second case
scenario optimization at 9.14%, and the third case scenario optimization
are 3.60% with an internal fin technology limitations, 2.77% by
limitations of twisted tape inserts technology, 7.69% with coiled wire
insert technology, and 4.61% with helical baffles technology.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSF 621.402 2 Gon r |
| Uncontrolled Keywords: | HEN, optimasi overall heat transfer coefficient, heat recovery |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Fandika aqsa |
| Date Deposited: | 15 Jun 2017 02:57 |
| Last Modified: | 24 Aug 2018 02:56 |
| URI: | http://repository.its.ac.id/id/eprint/41678 |
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