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All Journal Jurnal Teknik Mesin Jurnal Surya Teknika International Journal of Social Science IJIMCE : International Journal of Innovation in Mechanical Construction and Energy
Rahmat Hafiz
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Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Pembuatan Aplikasi 3 Dimensi Berbasis Augmented Reality pada Praktek Kerja Milling Haris, Haris; Rahmat Hafiz; Malinda Hasian; Sicilia Afriyani
JURNAL SURYA TEKNIKA Vol. 11 No. 2 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i2.7777

Abstract

The use of Augmented Reality (AR) technology in vocational education has grown rapidly, providing new opportunities to support practical learning processes. This research aims to develop an AR-based 3-dimensional application that is used in milling work practices, a basic technique in machining. This application is designed to help students understand fundamental concepts, operating procedures, and how to use milling machines in a more interactive and in-depth manner. Through this application, students can view 3D models of milling machines and their components, learn work steps through interactive simulations, and get visual guidance in a real AR environment. The development methods used include requirements analysis, system design, software development, and evaluation. The research results show that this application is effective in increasing students' understanding of milling material, as well as facilitating a more interesting and efficient learning process. It is hoped that the implementation of this application can become a model for the development of other educational technologies in the field of machining engineering.
Perancangan Ruang Pendingin Karkas Ayam Broiler Memanfaatkan Sumber Energi Hibrida Hafiz, Rahmat; Haris, Haris; Effiandi, Nota; Chadry, Rivanol; Saputra, Feri
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1629

Abstract

Small-scale broiler farming in Indonesia often suffers losses due to high production costs. In addition to rising feed prices, these losses are frequently caused by chickens that are ready for harvest being unsold in the market due to a decline in purchasing power. One solution that farmers can implement is to slaughter the chickens at the appropriate harvest time and store the carcasses in cooling rooms to sell them when market prices increase. This study aims to design and specify cooling storage equipment to store broiler carcasses using a combination of commercial and solar energy sources. The research begins by determining the cooling load of the system, specifying refrigeration components, evaluating solar energy potential at the location, and designing the required electrical system. Solar energy potential was calculated based on meteorological data obtained from an online database and processed using the PvSyst 7.2 application. Based on the analysis, the cooling storage requires 4.69 kW of power to reach optimal temperature within 6 hours, with a COPR value of 2.2. Meanwhile, the solar energy potential at the installation site is 4.44 kWh/m²/day, enabling the solar power system (PLTS) to generate an estimated annual energy output of 1802 kWh with a Performance Ratio (PR) of 65.07% and a Solar Fraction (SF) of 91.85%.
Optimizing the Development of a PLTMH System Using Pelton Turbine Technology to Enhance Energy Efficiency in Remote Areas as an Affordable and Sustainable Renewable Energy Solution Nur, Ichlas; Effiandi, Nota; Hafiz, Rahmat; Nofriadi; Latif, Abdul
IJIMCE : International Journal of Innovation in Mechanical Construction and Energy Vol. 2 No. 1 (2025): IJIMCE : International Journal of Innovation in Mechanical Construction and Ene
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/ijimce.v2i1.53

Abstract

Remote areas often face challenges in providing reliable and affordable access to electricity, In West Sumatra, there are still many 3T areas that lack access to electricity. Renewable energy sources, such as Micro Hydro Power Plants (PLTMH), can be the ideal solution to meet the energy needs in these areas. However, to enhance the efficiency and sustainability of PLTMH, it is essential to optimize the development and utilization of technology, particularly in the application of Pelton turbines.The goal of this research is to produce a micro-hydro power plant that can work optimally and efficiently to generate electrical energy for people without access to electricity. It is hoped that this research can also help improve the community's economic situation by meeting their economic needs. This activity aligns with the goals outlined in the PNP strategic plan, which focuses on developing technology to support the community's economy.The method used in this research is applicable design and construction based on community needs, followed by tool design, tool making, assembly.Initial design data is discharge 50 Lt/s, Head 25 m. From the calculation results, it is found that the absolute speed of the jet is 21.6 m/s, the optimal jet diameter is 2.9 mm, the diameter of the puncture circle is 132.4 mm, the number of bowls is 34, the width of the bowl is 8.26 mm, the height of the bowl is 6, .96 mm, Bowl Depth 2.61 mm, Bowl Mold Allowance 11.92 mm, and generator 3 kW. The process of making a Pelton turbine involves making the Pelton turbine runner, installing the turbine blade to the runner, making the nozzle, installing the generator, painting the tool.
THEORETICAL ANALYSIS OF CENTRIFUGAL PUMP SELECTION BASED ON HYDRAULIC PARAMETERS FOR ENERGY EFFICIENT IRRIGATION SYSTEM Rivanol Chadry; Mutiara Efendi; Rina, Rina; Rahmat Hafiz; Maheka Restu Araliz
International Journal of Social Science Vol. 5 No. 4 (2025): December 2025
Publisher : Bajang Institute

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Abstract

The efficiency of an irrigation system is strongly influenced by the proper selection of the water pump type, optimized according to the hydraulic requirements and comprehensive operational efficiency considerations. This study presents a theoretical analysis of centrifugal pump selection for paddy field irrigation systems, considering head losses, flow rate requirements, and power demand required to achieve optimal operational efficiency. Hydraulic equations and performance curves of commercially available centrifugal pumps were used to determine the most suitable pump configuration for the irrigation system’s operating conditions. The calculations encompass key parameters, including flow rate, flow velocity, total dynamic head, and pump power, to identify the most efficient pump type for irrigation applications. The analysis reveals that the selected centrifugal pump, operating at a discharge rate of 0.0056 m³/s and suction head variations between 3 and 10 m, yields a total head ranging from 4.7648 to 12.6627 m and a corresponding shaft power of 0.4745 to 1.4919 hp, with the efficiency maintained constant at 55%. The computational results demonstrate that variations in suction head are proportional to corresponding changes in total head and pump power. This theoretical approach offers a technical framework for selecting efficient and cost-effective centrifugal pumps suitable for small- to medium-scale agricultural irrigation systems. These findings underscore the significance of the theoretical approach as an efficient and cost-effective preliminary method for designing irrigation pump systems grounded in hydraulic analysis.
OPTIMIZATION OF POWER CONTROL TO ENSURE STABLE ELECTRICITY SUPPLY IN MICRO-HYDRO POWER PLANT Nota Effiandi; Rahmat Hafiz; Mutiara Efendi; Vamellia Sari Indah Negara; Reodhy Hamzah
International Journal of Social Science Vol. 5 No. 4 (2025): December 2025
Publisher : Bajang Institute

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Abstract

A This study proposes an optimization-based power control strategy to enhance voltage and frequency stability in micro-hydro power plants (MHPP). The approach integrates multi-objective optimization, adaptive control, predictive algorithms, and robust mechanisms to overcome instability caused by load and water flow variations. System modeling and simulation were performed in MATLAB/Simulink, followed by experimental validation on a laboratory-scale prototype. Results show significant improvements compared to conventional PID and fixed-gain Electronic Load Controllers (ELC), reducing voltage and frequency deviations by up to 69% and 67%, respectively. Total Harmonic Distortion (THD) decreased to 3.8%, power factor improved to 0.93, and overall efficiency reached 87.2%. The method proved effective, stable, and feasible for real-time microcontroller implementation, offering a reliable solution for isolated and rural MHPP systems.
Co-Authors Abdul Latif Haris Haris, Haris Ichlas Nur Maheka Restu Araliz Malinda Hasian Mutiara Efendi Nofriadi Nota Effiandi Nota Effiandi Reodhy Hamzah Rina Rina Rivanol Chadry Rivanol Chadry Saputra, Feri Sicilia Afriyani Vamellia Sari Indah Negara