Optimisasi Tekno-Ekonomi Pada Desain Geometri Heat Exchanger Dengan Dipengaruhi Fouling Resistance Menggunakan Beberapa Metode Stochastic Algorithm

Dinastari, Adista (2018) Optimisasi Tekno-Ekonomi Pada Desain Geometri Heat Exchanger Dengan Dipengaruhi Fouling Resistance Menggunakan Beberapa Metode Stochastic Algorithm. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Heat exchanger merupakan alat penukar panas diantara dua atau lebih fluida yang berbeda temperaturnya. Salah satu jenis heat exchanger yang digunakan pada proses perpindahan panas di industri yaitu tipe shell and tube heat exchanger (STHE). Temperature yang tinggi pada STHE menyebabkan semakin lama performansi heat exchanger menurun karena adanya fouling. Beberapa penelitian yang telah dilakukan untuk mengurangi adanya fouling adalah perancangan desain heat exchanger lebih efisien dan pembersihan secara berkala. Pada penelitian ini, optimisasi dilakukan untuk menentukan geometri shell and tube heat exchanger sehingga diperoleh fouling resistance minimal. Pemodelan fouling resistance menggunakan Polley model. Nilai fouling resistance dapat mempengaruhi perubahan pada heat duty (Q), kinerja pompa (Wp) heat transfer area (Ao). Penentuan jadwal pembersihan dapat mempengaruhi nilai fouling resistance. Perubahan harga pada besaran tersebut dapat mempengaruhi hasil saving (JHE). Batasan optimisasi adalah heat duty dan pressure drop. Optimisasi dilakukan dengan menggunakan beberapa metode stokastik yakni Genetic Algorithm (GA), Rain Water Optimization (RWA), Particle Swarm Optimization (PSO), Khiller Whale Algorithm (KWA) dan Duelist Algorithm (DA).Variabel yang dioptimisasi adalah diameter dalam shell (Ds), diameter luar tube (do), dan jumlah baffle (Nb). Dari hasil optimisasi didapatkan penurunan besar fouling resistance keseluruhan pada masing-masing metode GA, RWA, PSO, KWA dan DA sebesar 40,57%; 40,06%; 40,15%; 40,10%; 41,72%. Penurunan fouling resistance mengakibatkan saving (JHE) meningkat pada masing-masing metode GA, RWA, PSO, KWA dan DA sebesar 9,2%; 7,1%; 7,4%; 7,7%; 9,7%. ============== Heat exchanger is an equipment that exchange heat between two or more different temperature fluids. One type of heat exchanger used in industrial heat transfer process is shell and tube heat exchanger type (STHE). Temperature and high pressure on STHE cause the heat exchanger performance to decrease due to fouling. Some research that has been done to reduce the fouling is by designing heat exchanger more efficiently and periodic cleaning of heat exchanger. In this research, optimization is done to determine the geometry of shell and tube heat exchanger to obtain minimum fouling resistance. Fouling resistance modeling using Polley model. Fouling resistance values can affect changes in heat duty (Q), pump performance (Wp) heat transfer area (Ao). Determining the cleaning schedule can affect the fouling reisitance value. The value changes on these quantities may affect saving results (JHE). Optimization limits are heat duty and pressure drop. The optimization is done by using some stochastic methods namely Genetic Algorithm (GA), Rain Water Optimization (RWA), Particle Swarm Optimization (PSO), Khiller Whale Algorithm (KWA) and Duelist Algorithm (DA). The optimized variables are the inner diameter of the shell (Ds ), outer diameter of tube (do), and number of baffles (Nb). From the optimization result, there was decreased value of overall fouling resistance on each method of GA, RWA, PSO, KWA and DA consecutively 40.57%; 40.06%; 40.15%; 40.10%; 41.72%. The decrease of fouling resistance value resulted in saving (JHE) increased in each method of GA, RWA, PSO, KWA and DA consecutively 9.2%; 7.1%; 7.4%; 7.7%; 9.7%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Optimisasi; Fouling Resistance; Geometri; Saving; optimization
Subjects: Q Science > QA Mathematics > QA274.2 Stochastic analysis
Q Science > QC Physics
T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers
Divisions: Faculty of Industrial Technology > Physics Engineering > (S1) Undergraduate Theses
Depositing User: Adista Dinastari
Date Deposited: 18 Apr 2018 06:46
Last Modified: 18 Apr 2018 06:46
URI: http://repository.its.ac.id/id/eprint/50850

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