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All Journal AEEJ : Journal of Automotive Engineering and Vocational Education Dinamis Jurnal Teknik Indonesia
Edy Susanto
Institut Teknologi PLN
Automotive Engineering Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Bending Strength Analysis of Composite Materials with Coconut Fiber Reinforcement Using Manual Hand Lay-Up Method asrullah asrul; M. Yasep Setiawan; Hasan Maksum; Nuzul Hidayat; Edy Susanto; Ichsan Nasution
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 6 No 1 (2025): Vol 6 No 1 (2025) : AEEJ : Journal of Automotive Engineering and Vocational Educa
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v6i1.288

Abstract

This study investigates the mechanical performance of coconut coir fiber-reinforced composites with volume fractions of 30% and 40%, fabricated using the Manual Hand Lay-Up method. Specimens were tested under three-point bending following ASTM D790-03 to evaluate flexural strength. Results show that composites with a 30% fiber volume exhibit superior bending strength and stiffness compared to those with 40%, indicating a more optimal fiber–matrix ratio. The reduction in performance at higher fiber content is attributed to uneven resin distribution and inadequate fiber impregnation. These findings highlight the potential of coconut coir as a sustainable reinforcement material and emphasize the importance of optimizing fiber volume and manufacturing methods. The study recommends the use of alternative fabrication techniques, such as vacuum infusion, to improve resin homogeneity and mechanical reliability, particularly for structural and lightweight composite applications.
Analisis Life Cycle Cost (LCC) Mesin Diesel pada PLTD Tenau Kupang untuk Evaluasi Efisiensi Biaya dan Manajemen Operasional Dwi Murdani; Edy Susanto
Jurnal Teknik Indonesia Vol. 5 No. 3 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i3.890

Abstract

Pembangkit Listrik Tenaga Diesel (PLTD) masih menjadi komponen penting dalam penyediaan energi listrik, khususnya di wilayah kepulauan dengan keterbatasan infrastruktur transmisi. Namun, tingginya biaya bahan bakar, pemeliharaan, dan penurunan efisiensi mesin akibat umur operasi menjadi tantangan utama dalam pengelolaan PLTD secara berkelanjutan. Penelitian ini bertujuan untuk menganalisis Life Cycle Cost (LCC) mesin diesel pada PLTD Tenau Kupang serta mengevaluasi faktor yang memengaruhi efisiensi biaya operasional pembangkit. Metode penelitian menggunakan pendekatan kuantitatif melalui analisis LCC berdasarkan data operasional aktual periode 2020–2025 yang mencakup jam operasi mesin, konsumsi bahan bakar, produksi energi listrik, biaya pemeliharaan, dan parameter efisiensi Specific Fuel Consumption (SFC). Analisis sensitivitas dilakukan untuk mengetahui pengaruh perubahan harga bahan bakar, efisiensi mesin, tingkat diskonto, dan biaya overhaul terhadap total biaya siklus hidup. Hasil penelitian menunjukkan bahwa total LCC tiga unit mesin diesel PLTD Tenau Kupang mencapai sekitar Rp31,55 miliar. Mesin Caterpillar memiliki kontribusi LCC terbesar sebesar 59,2%, sedangkan biaya bahan bakar menjadi komponen dominan pada mesin MAK dengan kontribusi sekitar 47–51%. Perubahan harga bahan bakar dan nilai SFC terbukti menjadi faktor paling sensitif terhadap perubahan nilai LCC. Penelitian ini menyimpulkan bahwa peningkatan efisiensi bahan bakar, optimalisasi pembebanan mesin, dan penerapan pemeliharaan berbasis kondisi menjadi strategi utama dalam menekan biaya siklus hidup PLTD.
Performance Analysis of a Portable Solar Panel Charging System for Urban Parks FAHMI NORCAHYO Fahmi Norcahyo; Edy Susanto
DINAMIS Vol. 14 No. 1 (2026): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v14i1.24247

Abstract

The increasing use of portable electronic devices in urban parks has created a growing demand for independent and environmentally friendly charging facilities. This study aims to analyze the performance of a portable solar panel charging system under variations in solar irradiance, panel capacity, and panel configuration. Three irradiance levels (2.5, 4.5, and 5.5 kWh/m²/day), three panel capacities (100 Wp, 150 Wp, and 200 Wp), and three configurations (single panel, parallel, and series) were evaluated. Engineering-based energy calculations were validated using MATLAB/Simulink through the PV Array Model to analyze the current–voltage (I–V) and power–voltage (P–V) characteristics of the photovoltaic system. The results show that solar irradiance is the dominant factor affecting daily energy production. Under medium irradiance conditions (4.5 kWh/m²/day), the estimated daily energy outputs of the 100 Wp, 150 Wp, and 200 Wp panels were approximately 315 Wh/day, 472.5 Wh/day, and 630 Wh/day, respectively, while the highest energy output of 770 Wh/day was achieved by the 200 Wp panel under high irradiance conditions (5.5 kWh/m²/day). Among the evaluated configurations, the parallel arrangement provided the most suitable performance for portable charging applications because it delivered higher output current and improved battery charging capability. Based on the obtained results, a portable solar panel system with a capacity of 150–200 Wp in a parallel configuration is recommended for charging electronic devices in urban parks. These findings demonstrate that combining appropriate panel capacity, solar irradiance conditions, and system configuration can significantly improve the performance and practicality of portable photovoltaic charging systems for public outdoor facilities.
Co-Authors asrullah asrul Dwi Murdani FAHMI NORCAHYO Fahmi Norcahyo Hasan Maksum Ichsan Nasution M. Yasep Setiawan Nuzul Hidayat, Nuzul