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All Journal JURNAL INTEGRASI Vocatech : Vocational Education and Technology Journal
Gusnam, Mu'thiana
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Mechanical Engineering Other

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Prototype Sistem Elevator Menggunakan Motor Stepper Berbasis Atmega 16 Wicaksono, Muhammad Jaka Wimbang; Diono, Diono; Sani, Abdullah; Dzulfiqar, Mohamad Alif; Budiana, Budiana; Aryeni, Illa; Oktani, Dessy; Kamarudin, Kamarudin; Futra, Asrizal Deri; Darmoyono, Aditya Gautama; Mahdaliza, Rahmi; Hasnira, Hasnira; Maulidiah, Hana Mutialif; Gusnam, Mu'thiana
JURNAL INTEGRASI Vol 15 No 2 (2023): Jurnal Integrasi - Oktober 2023
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v15i2.6058

Abstract

Elevator are one of the most important transportation these days. Elevator is a link in a tall building that has many floors. The role of the elevator which is always used by the public requires a high level of precision. In this study, researchers made a prototype elevator system using a stepper motor and obtained test results with a maximum error rate of 2% on the 10 cm elevator input using a ruler as a testing tool. The largest comparison of testing result using a ruler and using a rotary encoder is 0.2 cm or 2 mm at the 40 cm elevator input. The precision of the elevator prototype still can be improved by using half step mode when controlling the stepper motor.
Optimisasi Desain Heat Exchanger Shell dan Tube Menggunakan Helical Baffles dan Twisted Tape Inserts Sebagai Teknologi untuk Meningkatkan Heat Transfer Coefficient Syafi'i, Ahmad; WimbangWicaksono, Muhammad Jaka; Darmoyono, Aditya Gautama; Lubis, Eka Mutia; Oktani, Dessy; Kamarudin, Kamarudin; Mahdaliza, Rahmi; Gusnam, Mu'thiana; Biyanto, Totok Ruki; Utami, Intan Tri
VOCATECH: Vocational Education and Technology Journal Vol 7, No 1 (2025): August
Publisher : Akademi Komunitas Negeri Aceh Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38038/vocatech.v7i1.217

Abstract

Abstract Heat exchanger is a device used to transfer thermal energy between two or more fluids at different temperatures. This study aims to develop an efficient shell and tube heat exchanger design that is accompanied by an increase in the overall heat transfer coefficient on the shell and tube sides simultaneously. This study focuses on the impact of using helical baffles and twisted tape inserts technology on the total heat transfer coefficient (U) and pressure drop (ΔP). This study analyzes the effect of employing helical baffles on the shell side and twisted tape inserts on the tube side, with optimization using the Genetic Algorithm (GA) method. The independent variables considered include the helical baffles angle (β), the spacing between baffles (Lbc), the thickness of the twisted tape (δ), and the half-pitch of the twisted tape (H). The optimization objective function for both the shell side and tube side is to maximize the overall heat transfer coefficient, while the restriction is that the pressure drop must not surpass the starting design data value. In this study, the E-1-06 heat exchanger was successfully modeled. The modeling data showed only slight differences between the modeling results and the initial data sheet. The deviation value of the overrall heat transfer coefficient (U) = 0.06%, ∆Ps = 0.00%, and ∆Pt = 0.06%. Optimization of the E-1-06 heat exchanger was also successful. Optimization in this study was able to increase the U value by 3.97%, while the ∆Ps value decreased by -2.01% and ∆Pt by -19.11%. The findings indicate that the modified design is capable of enhancing thermal performance without compromising hydraulic efficiency, thereby demonstrating its potential for application in energy processing systems and industrial cooling.AbstrakHeat exchanger adalah perangkat yang digunakan untuk menyalurkan energi termal antara dua atau lebih fluida pada suhu yang berbeda-beda. Penelitian ini bertujuan untuk mengembangkan desain heat exchanger shell dan tube yang efesien yang disertai dengan peningkatan koefisien perpindahan kalor secara keseluruhan pada sisi shell dan tube secara bersamaan. Penelitian ini berfokus pada dampak penggunaan teknologi helical baffles dan twisted tape insert pada koefisien perpindahan kalor total (U) dan penurunan tekanan/ Pressure drop (ΔP). Pada awalnya heat exchanger ini menggunakan teknologi segmental baffle pada sisi shell dan plain tube pada sisi tube, kemudian desainnya dimodifikasi dengan teknologi yang berbeda, desain pada sisi shell digunakan teknologi helical baffle sedangkan pada sisi tube digunakan teknologi twisted tape. Metode optimisasi yang digunakan adalah Genetic Algoritm (GA). Variabel bebas yang digunakan untuk melakukan optimisasi pada sisi shell adalah sudut helical baffle (ß) dan jarak antar baffle (Lbc) yang ada dalam heat exchanger. Sedangkan variabel bebas yang digunakan pada sisi tube adalah thickness of twisted tape (?), dan half pitch of twisted tape (H). Fungsi tujuan (objective function) optimisasi pada sisi shell dan sisi tube yaitu koefisien perpindahan panas secara keseluruhan (overrall heat transfer coefficient) yang maksimal dan constraint pada optimisasi ini yaitu penurunan tekanan (pressure drop) yang besar nilainya tidak boleh melampaui nilai dari data awal design. Pada penelitian ini heat exchanger E-1-06 berhasil dimodelkan. Data permodelan menunjukkan hanya sedikit perbedaan antara hasil permodelan dengan data sheet awal. Nilai deviasi overrall heat transfer coefficient (U) = 0.06%, ∆Ps=0.00%, dan ∆Pt= 0.06%. Optimisasi Heat exchanger E-1-06 juga berhasil dilakukan. Optimisasi pada penelitian ini mampu menaikan nilai U sebesar 3.97%, sementara nilai ∆Ps mengalami penurunan sebesar -2.01% dan ∆Pt sebesar -19.11%.
Co-Authors Aryeni, Illa Budiana, Budiana Darmoyono, Aditya Gautama Diono, Diono Dzulfiqar, Mohamad Alif Futra, Asrizal Deri Hasnira Hasnira, Hasnira Heni Pujiastuti Kamarudin Kamarudin Lubis, Eka Mutia Mahdaliza, Rahmi Maulidiah, Hana Mutialif Oktani, Dessy Syafi'i, Ahmad Totok Ruki Biyanto Utami, Intan Tri Wicaksono, Muhammad Jaka Wimbang WimbangWicaksono, Muhammad Jaka