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rancang bangun mesin pemecah kemiri dengan metode lempar untuk meningkatkan produktivitas dengan kapasitas 20kg/jam: rancang bangun mesin pemecah kemiri dengan metode lempar untuk meningkatkan produktivitas dengan kapasitas 20kg/jam Sastra Afriansa; Mietra Anggara; Amri Hidayat; Afrianto
Hexagon Vol 6 No 2 (2025): Vol. 6 No. 2 (2025): HEXAGON - Edisi 12
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v6i2.5776

Abstract

In general, the process of cracking candlenuts still uses a manual process with rattan bags and hit on stones, so it requires a lot of manpower with special skills. The method used in this study is the throwing system. Based on the results of the study, the results of the rotor test with an average test using 3 rpm variations. Where using 800 rpm obtained intact results with a value of 24.39%, split in half 21.13%, crushed 4.87% and not broken 44.71%. Then with the use of 1000 rpm obtained intact results with a value of 28.45%, split in half 19.51%, crushed 4.06% and not broken 41.46%. While the use of 1200 rpm can produce intact cores 27.23%, split in half 18.29%, crushed 16.26% and not broken 32.52%. So in the test with the rotor using 3 rpm variations (800,100, and 1200) the results of the intact core were obtained with a rotation of 1200 rpm with a result of 27.23%. So by using the designed candlenut nut cracker, the production capacity of the cracker is able to break with a capacity of up to 20 kg / hour.
Perencanaan dan Optimasi Pembangkit Listrik Tenaga Mikrohidro (PLTMH) di Indonesia : Tinjauan Literatur Mukhtar Hadi; Afrianto; Imam Syaukani
Impression : Jurnal Teknologi dan Informasi Vol. 4 No. 2 (2025): July 2025
Publisher : Lembaga Riset Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59086/jti.v4i2.983

Abstract

Penelitian ini meninjau perencanaan dan optimasi Pembangkit Listrik Tenaga Mikrohidro (PLTMH) di Indonesia, dengan fokus pada aspek teknis, ekonomi, dan sosial. Berdasarkan tinjauan literatur, perencanaan yang matang sangat penting untuk memastikan pemanfaatan potensi lokal secara optimal, mencakup pemilihan lokasi, debit, head, serta turbin yang sesuai. Optimasi teknologi, seperti sistem stabilisasi tegangan dan pintu air otomatis, terbukti meningkatkan efisiensi sistem. Namun, penerapan teknologi canggih seperti AI dan smart grid masih terbatas. Penelitian ini mengidentifikasi gap dalam integrasi aspek sosial-ekonomi dan teknologi, serta menyarankan pengembangan model perencanaan yang lebih adaptif dan integrasi teknologi terbaru untuk meningkatkan keberlanjutan dan efisiensi PLTMH di masa depan.   This study reviews the planning and optimization of Micro-Hydro Power Plants (MHPP) in Indonesia, focusing on technical, economic, and social aspects. Based on the literature review, effective planning is crucial to ensure the optimal utilization of local resources, including site selection, flow rate, head, and appropriate turbine selection. Optimization technologies, such as voltage stabilization systems and automatic gate systems, have proven to enhance system efficiency. However, the application of advanced technologies like AI and smart grids remains limited. This study identifies gaps in the integration of socio-economic aspects and technology, and recommends the development of a more adaptive planning model and the integration of cutting-edge technologies to enhance the sustainability and efficiency of MHPPs in the future  
Evaluasi Kinerja Pembangkit Listrik Tenaga Mikro Hidro (PLTMH) Desa Tepal, Kabupaten Sumbawa pada Kondisi Beban Puncak Afrianto; Mukhtar Hadi; Mietra Anggara; Imam Syaukani; Putri Indah Kencana
Impression : Jurnal Teknologi dan Informasi Vol. 4 No. 3 (2025): November 2025
Publisher : Lembaga Riset Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59086/jti.v4i3.1320

Abstract

Penelitian ini bertujuan untuk mengevaluasi kinerja Pembangkit Listrik Tenaga Mikrohidro (PLTMH) Desa Tepal, Kabupaten Sumbawa, yang menggunakan turbin crossflow, khususnya pada kondisi beban puncak. Metode penelitian menggunakan pendekatan deskriptif kuantitatif melalui pengukuran langsung parameter hidrolik dan elektrikal, meliputi debit air, tinggi jatuh efektif, tegangan, arus, frekuensi, serta kondisi beban generator tiga fasa. Daya teoritis dihitung berdasarkan parameter hidrolik dan efisiensi komponen sistem, sedangkan daya aktual ditentukan dari hasil pengukuran tegangan dan arus generator. Hasil penelitian menunjukkan bahwa pada debit aktual sebesar 0,03 m³/detik diperoleh daya listrik teoritis generator sebesar 5,73 kW, sementara hasil pengukuran lapangan menunjukkan daya listrik aktual mencapai 19,1 kW pada kondisi beban puncak. Ketidaksesuaian yang signifikan antara daya teoritis dan daya aktual ini mengindikasikan adanya keterbatasan dalam estimasi debit serta pengaruh dominan karakteristik beban, ketidakseimbangan arus antar fasa, dan sistem kendali beban terhadap kinerja pembangkit. Jika dibandingkan dengan potensi daya berdasarkan debit desain turbin, PLTMH Desa Tepal belum beroperasi pada kondisi optimal. Hasil penelitian ini memberikan dasar evaluasi untuk perbaikan sistem kendali dan pengelolaan beban PLTMH agar operasi pembangkit lebih efisien dan andal.   This study aims to evaluate the performance of the Micro Hydropower Plant (MHP) in Tepal Village, Sumbawa Regency, which utilizes a crossflow turbine, particularly under peak load conditions. The research method employs a quantitative descriptive approach through direct measurements of hydraulic and electrical parameters, including water discharge, effective head, voltage, current, frequency, and the load conditions of a three-phase generator. The theoretical power is calculated based on hydraulic parameters and system component efficiencies, while the actual power is determined from measured generator voltage and current. The results show that at an actual discharge of 0.03 m³/s, the theoretical electrical power of the generator is 5.73 kW, whereas field measurements indicate that the actual electrical power reaches 19.1 kW under peak load conditions. The significant discrepancy between theoretical and actual power indicates limitations in discharge estimation as well as the dominant influence of load characteristics, phase current imbalance, and the load control system on plant performance. When compared to the power potential based on the turbine design discharge, the Tepal Village MHP has not yet been operating under optimal conditions. These findings provide a basis for evaluating improvements in the load control system and load management to ensure more efficient and reliable plant operation.