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All Journal Jurnal Energi Dan Manufaktur Jurnal Teknik Mesin ROTOR: JURNAL ILMIAH TEKNIK MESIN Jurnal Bisnis, Manajemen, dan Informatika Dharma Raflesia : Jurnal Ilmiah Pengembangan dan Penerapan IPTEKS MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Jurnal Teknik Mesin Electrician : Jurnal Rekayasa dan Teknologi Elektro TEKNOSIA Jurnal Polimesin
Helmizar -
Teknik Mesin-Universitas Bengkulu, Bengkulu, 38371, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Literasi Pemanfaatan Olahan Sampah Organik Rumah Tangga pada Kelompok Mangga RT 30 Kelurahan Sawah lebar Baru Hoten, Hendri Van; Nurbaiti; Helmizar
DHARMA RAFLESIA Vol 22 No 1 (2024): JUNI (ACCREDITED SINTA 5)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v22i1.30207

Abstract

As we all know, waste is a problem in daily life. The problem of waste that often occurs is the mixing or not being separated between organic and non-organic waste. The variety of organic waste is abundant and rich in minerals needed for soil fertility and by plants. Therefore, the management of organic waste is strived to become a culture at the smallest environmental level. There are two types of organic waste, solid and liquid. Organic waste is useful for composting planting media, while liquid waste is useful for liquid organic fertilizer (POC). Working alone often causes boredom, no sharing environment causes monotonous knowledge, lack of motivation, no mutual cooperation and mutual reinforcement. Therefore, a systems approach is needed through the formation of groups for the utilization of the organic waste. Through the 2021 FT Unib Development Service, the formation of Environmental Organic Waste Utilization Group among neighbors is an effort that is raised so that members of this group will manage household waste in at least one type, namely the manufacture of POCs and socialization of the processing of the waste.
Design of an Off-Grid Solar PV System for a Renewable Energy-Based Home in Bengkulu Rinaldi, Reza Satria; Herawati, Afriyastuti; Anggraini, Ika Novia; Helmizar, Helmizar
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 7 No 3 (2025): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v7i3.449

Abstract

Bengkulu Province has a solar energy potential of 3,475 MW, with an average daily solar irradiance duration of 5.9 hours in 2022 and 8.3 hours in 2023. This study designs an off-grid solar PV system for a renewable energy-based home (REH) model in the coastal area of Bengkulu City. The REH is a home with electrical energy independence that utilizes renewable energy systems to generate electricity. This study focuses on the REH powered by solar energy, intended for a modest home with a power capacity equivalent to a 900 VA PLN customer classification. The data on solar energy potential in the coastal area of ​​Bengkulu City used in this study is from the Global Solar Atlas. The data analysis confirmed the need for the REH model to generate electricity from solar energy, requiring 12 units of 120Wp PV modules in a PV array. An appropriate solar charge controller for this REH model is the MPPT SCC with a rating of 48 V 30 A. Based on the selected PV modules and the daily load of the REH model, the required 48 V battery capacity is 300 Ah, and the PSW Inverter 2,000 VA 48 V.
Experimental study on a laboratory-scale archimedes screw turbine using pitch-to-diameter ratio for low-head hydropower Helmizar Helmizar; Nurcholish Windiharto; Yovan Witanto; Afdhal Kurniawan Mainil; Rahmat Iman Mainil; Khotso Sai
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.6690

Abstract

The Archimedes screw is a hydropower technology well-suited for low-head applications This study investigates the performance of a laboratory-scale Archimedes screw turbine for low-head hydropower applications by varying pitch-to-diameter ratio (P/D = 0.3, 0.38, 0.45, 0.52) and inclination angle (β = 22°, 25°, 27°). Experiments were conducted in a controlled water flow environment to evaluate torque, power output, and efficiency at different rotational speeds. Results indicate that both P/D and β significantly influence energy conversion. The highest performance was achieved at P/D = 0.45 and β = 22°, producing a peak torque of 0.36 Nm, a power output of 2.4 W, and a maximum efficiency of 52.37%. Lower inclination angles contributed to improved hydraulic energy capture due to better water filling and reduced slippage. These findings highlight the importance of optimizing geometric parameters to enhance turbine performance in small-scale, sustainable energy systems. The results offer design guidance for implementing Archimedes screw turbines in rural or off-grid low-head hydropower scenarios.
Co-Authors Afdhal Kurniawan Maini Afdhal Kurniawan Mainil Alqap, A. Sofwan F Andang Wijanarko Anggraini, Ika Novia Chossy Aulia Prasetyo Fauzan Andreas Firmansyah Adam Permana Agustian Hendri van Hoten Herawati, Afriyastuti Hery Suhartoyo Khotso Sai Mochammad Yusa Muhammad Khairul Amri Rosa Nurbaiti Nurbaiti Nurcholish Windiharto Nurul Hidayati Rahmat Iman Mainil Reza Satria Rinaldi Rijalul Rahman Hakim Setiawan, Yudi Yovan Witanto Yudi Setiawan