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Jurnal Rekayasa Material, Manufaktur & Energi
Published by Universitas Muhammadiyah Sumatera Utara
ISSN : 26227398     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Aerospace Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
Jurnal Rekayasa Material, Manufaktur & Energi, yang diterbitkan oleh Fakultas Teknik, Program Studi Teknik Mesin, Universitas Muhammadiyah Sumatera Utara (UMSU), Medan, Sumatera Utara, Indonesia, Jurnal Rekayasa Material, Manufaktur & Energi menerima artikel ilmiah hasil-hasil penelitian, dan eksperimen, yang mencakup pada bidang Rekayasa Material, Manufaktur dan Energi, Mesin, dan ilmu yang relevan pada sektor terkait.
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Articles 16 Documents
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Search results for , issue "Vol 6, No 2: September 2023" : 16 Documents clear
Analisis Pengaturan Jarak Cahaya Lampu Halogen Pada Rancang Bangun Solar Test Simulator ., Cholish; Faza, Sharfina; Hajar, Ibnu; ., zumhari; Azis, Abdul; ., abdullah
Rekayasa Material, Manufaktur dan Energi Vol 6, No 2: September 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i2.16899

Abstract

This study focuses on the use of halogen lamps in the design of a Solar Test Simulator to simulate sunlight conditions in testing solar panels. Halogen lamps are chosen as the light source due to their ability to approximate the solar spectrum, enabling testing of solar cells in a controlled laboratory environment. However, precise adjustment of halogen lamp light is crucial to ensure the accuracy and consistency of test results. The design of the Solar Test Simulator for Solar Panels involves configuring the placement of solar panels so that the designed tool can provide simulation based on actual solar panel measurements. The performance of solar panels is displayed through a monitor placed in the design, providing comprehensive information about the solar panels. Limitations in the placement of solar panels do not provide reference regarding measurement conditions based on the angle of incoming sunlight. Therefore, further design is needed concerning the positioning of solar panels during measurements. The development in this tool's design includes adjustments to the height of the halogen lamp from the solar panel, specifically at heights of 0.328m, 0.366m, and 0.405m.
Analisis Kinerja Turbin Hidrokinetik Dengan Selubung Diffuser Pada Kondisi Yaw Misalignment Berdasarkan Variasi Kecepatan Aliran Air ., Nasrullah; ., Nofriadi; ., Nasirwan; Leni, Desmarita; Kesuma, Dytchia Septi
Rekayasa Material, Manufaktur dan Energi Vol 6, No 2: September 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i2.16190

Abstract

Yaw Misalignment condition has detrimental effects on the performance and efficiency of hydrokinetic turbines. This phenomenon occurs when the direction of water flow hitting the turbine blades is not aligned with the turbine's movement direction. In this research, an analysis is conducted on the performance of a hydrokinetic turbine equipped with a diffuser shroud under Yaw Misalignment conditions, considering variations in water flow velocity. The dataset used in this study consists of water flow velocity data, yaw angles, tip speed ratio (TSR), and power coefficient (Cp) of a 19.8 cm diameter horizontal-axis hydrokinetic turbine operating under Yaw Misalignment conditions. Experiments were conducted at three water flow velocity levels: 0.7 m/s, 0.9 m/s, and 1.1 m/s. Additionally, yaw angle variations were applied ranging from 0° to 25° at 5° intervals. Data analysis involved the application of Pearson correlation analysis and descriptive statistical analysis to identify the maximum Cp values. The analysis results indicate that the highest maximum Cp value is 0.711, with a tip speed ratio (TSR) of 4.33, achieved at a yaw angle of 0° and a water flow velocity of 0.9 m/s. This indicates that under these conditions, the turbine reaches its peak performance in converting water flow energy into mechanical power.
Peran Minyak Kayu Putih Terhadap Karakteristik Pembakaran Minyak Kapuk Sebagai Bahan Bakar Alternatif Riupassa, Helen
Rekayasa Material, Manufaktur dan Energi Vol 6, No 2: September 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i2.15818

Abstract

The study conducted experimental investigations on the burning rate of crude kapuk oil droplets by incorporating bio-additives derived from eucalyptus oil. The bio-additive concentration of eucalyptus oil added to the kapuk oil was 100 ppm and 300 ppm, respectively. The droplet combustion method was chosen to maximize the contact area between the air and fuel, thereby enhancing the reactivity of fuel molecules.The findings revealed that the cineol compounds present in eucalyptus oil exhibit aromatic properties and possess an asymmetrical carbon chain geometry. This characteristic has the potential to facilitate effective collisions among fuel molecules, thereby promoting combustion. This was evident from the observed increase in the burning rate. Furthermore, the observations indicated that the highest burning rate was achieved when both bio-additives were 300 ppm.These results highlight the positive impact of incorporating eucalyptus oil as a bio-additive in crude kapuk oil. The aromatic nature and unique geometric structure of cineol compounds contribute to the fuel's increased reactivity and enhanced combustion performance. By utilizing bio-additives, such as eucalyptus oil, at an optimal concentration, it is possible to further improve kapuk oil's burning characteristics and overall performance as a biofuel.These findings provide valuable insights into the development of more efficient and sustainable alternative energy sources. By understanding the molecular aspects and effects of bio-additives, researchers can continue to explore and optimize the utilization of biofuels, such as crude kapuk oil, for a greener and more environmentally friendly energy future.
Perancangan Aplikasi Berbasis Web Sebagai Alat Pendukung Keputusan Dalam Memilih Ac Hemat Energi ., Maimuzar; Sumiati, Ruzita; ., Haris; Leni, Desmarita; Dwiharzandis, Aggrivina
Rekayasa Material, Manufaktur dan Energi Vol 6, No 2: September 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i2.16255

Abstract

The increase in global energy demand has driven the need for efficient solutions in selecting energy-efficient air conditioners (ACs). This research focuses on designing a web-based application as a decision support tool for choosing energy-efficient ACs. Energy-efficient labeled AC data is obtained from the Directorate General of New and Renewable Energy and Energy Conservation (EBTKE) website. This database is processed according to the system's requirements, where each AC brand is evenly represented to prevent dominance by a few brands. There are 11 different AC brands in this dataset, and each brand has 10 data samples. The web-based application is developed using the Python programming language with the Streamlit framework. This application allows users to compare various AC brands by considering power, annual energy consumption, efficiency value, and electricity cost. In the application design, users can select AC brands according to their needs, set the operating duration, choose the AC efficiency level, and select the inverter AC type. The application presents comparisons in the form of bar charts, making it easy for users to understand the differences in AC characteristics. The average results from the efficiency comparison of each AC brand reveal that Daikin achieves the highest efficiency at 16.36 Energy Efficiency Ratio (EER), while the GREE brand has the lowest efficiency at 5.83 EER. This application can assist consumers and industrial AC stakeholders in making decisions to choose energy-efficient ACs according to their needs.
Analisis Penyebab dan Solusi Masalah Durasi Overhaul Dump Truck Komatsu HD 785-7 Tidak Sesuai Rencana Latif, Akhmad Abdul; Nurhadi, Nurhadi
Rekayasa Material, Manufaktur dan Energi Vol 6, No 2: September 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i2.15916

Abstract

Dump Truck is one of the heavy equipment that functions to transport materials such as soil and coal. For this machine to always be in the best condition, periodic maintenance is required, one of which is overhaul maintenance. There are various types of overhaul work on the Komatsu HD 785-7 dump truck unit. Even though there was good planning before the work started, there were still problems with the duration of the Komatsu HD 785-7 overhaul dump truck work which was not in accordance with the initial plan and resulted in the company as a heavy equipment rental service provider losing money. The purpose of this study is to analyze the causes of the duration of work on the Komatsu HD 785-7 dump truck overhaul and provide a solution as a recommendation or reference for the company. The method used is descriptive quantitative method. Descriptive quantitative methods are used to understand an event regarding the duration of an overhaul that is not according to plan in depth, by describing and explaining the characteristics of the incident. Collecting data by interviewing workers, observing in the field, distributing questionnaires and archives of previous overhaul work documents. The results of the study show that the main cause of the duration of work that is not according to plan is the arrival of spare parts or major components not according to schedule, and the addition of work accompanied by the addition of spare parts. The solution provided is to schedule joint inspection work to be carried out earlier with the aim of being able to find out the additional spare parts needed so that the ordering time can be made earlier and the waiting time for spare parts supply can be reduced.
Pembuatan Otomatisasi Alat Pengecekan pH Air Pada Mesin Pemberi Pakan Ternak Ikan Dongoran, Rahmat Sati; Siregar, Ahmad Marabdi
Rekayasa Material, Manufaktur dan Energi Vol 6, No 2: September 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i2.17195

Abstract

An automatic fish feeding and water pH control system for catfish farming is being developed. The system involves assembling and constructing a control circuit with electronic components and sensors, applying IoT technology to control the pH regulator remotely. The device is designed to control water pH through circulation and periodic measurement of water pH in the catfish pond using a pH sensor (PH4502C type). The system utilizes a digital RTC DS1307 module to schedule feeding times. Communication between a smartphone and the control circuit occurs over the internet for data transfer and commands. It enables feeding control for catfish ponds and integrates with smartphones. The machine designed for feeding and water pH regulation in fish farming uses an Arduino device with Node MCU as the control unit. The pH sensor and water pH regulator functions are implemented to control and check water acidity in the pond. Automation processes include using a servo motor for automatic feeding, a pH sensor for water pH measurement, and a water pump for pH regulation. The RTC serves as a digital clock to provide timing information to the microcontroller, ensuring the programmed tasks run as scheduled. The IoT system allows remote control and monitoring, enabling bidirectional communication using a WiFi adapter device, specifically the Node MCU. The Node MCU connects to a WiFi hotspot and interfaces with the Blynk server on the smartphone. The system's menu includes pH display, buttons to activate/deactivate the water pump, feeding control, and notifications.

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