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All Journal Jurnal Informatika Terpadu Logic : Jurnal Rancang Bangun Dan Teknologi
Purba, Riki
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Aplikasi Pengukuran Kayu Berbasis Android pada SMK Kehutanan (Studi Kasus SMK Kehutanan Sobat Bumi) Liani, Erna; Purba, Riki; Anggraini, Novita
Jurnal Informatika Terpadu Vol 10 No 1 (2024): Maret, 2024
Publisher : LPPM STT Terpadu Nurul Fikri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54914/jit.v10i1.1000

Abstract

Android applications have become a popular operating system throughout the world because of their development, Android applications also have an influence on the world of education as supporting learning media. Sobat Bumi Forestry Vocational School requires media and tools to practice measuring wood. Processing and media that are still manual result in frequent human errors or the media used is often damaged and also wastes time. In this problem, media and tools or an Android-based wood measurement application are needed to help and simplify calculations, processing and recording of data so that the resulting data is more accurate. This research uses data collection methods and the waterfall method as application system development. At the code writing stage, the standard formula for measuring Indonesia wood is used, namely 0,7854 x d x p /10.000. The research results show that the Android-based wood measurement application helps Forestry Vocational School students in the process of calculating wood volume more accurately. The media or tools for recording and processing data will be more practical and can be used as a medium for implementing Android applications.
Thermal Performance of a Branching-Channel Liquid Cooling System for Cylindrical Li-Ion 18650 Batteries Wijaya, Anggie Topan; Julian, James; Wahyuni, Fitri; Purba, Riki; Madhudhu, Fathin; Ermadani, Elvi; Winarta, Adi
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.210-218

Abstract

Lithium-ion batteries need effective thermal management to avoid safety risks like thermal runaway. This study analyzes and optimizes a liquid cooling system. Battery Thermal Management System (BTMS) using a branching mini-channel cold plate design for eight Li-ion 18650 batteries. A Computational Fluid Dynamics model was developed to simulate performance at a 2C discharge rate with configurations of 3 (N3), 5 (N5), and 7 (N7) branches. The results, validated against experimental data, showed that all configurations kept maximum temperatures below 37°C and maintained temperature uniformity (ΔT) below 5°C. Increasing branches reduced pressure drop, with the N7 design showing the lowest ΔP of 5.16 Pa. Although it had a lower heat transfer coefficient, N7 achieved the highest J/F factor, indicating optimal thermo-hydraulic performance for liquid-cooled battery systems.
Co-Authors Adi Winarta, Adi Ermadani, Elvi Fitri Wahyuni James Julian Liani, Erna Madhudhu, Fathin Novita Anggraini Wijaya, Anggie Topan