Ariyano Ariyano
Universitas Pendidikan Indonesia

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Development of Multimedia Based on Autodesk Inventor Software on the Concept of Relative Velocity to Increase Students Generic Science Skill Ariyano Ariyano; Amay Suherman; Handiansyah Akhmadi
Journal of Vocational Education Studies Vol. 3 No. 2 (2020)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/joves.v3i2.2482

Abstract

This research aims to develop autodesk inventor-based multimedia that was designed to increase students generic science skill on the application of relative velocity at kinematics and dynamics courses. This study used the mini course method developed by Borg and Gall, including the stage of analysing and planning, developing early product, and validating from the expert and revision the early product. Based on the analysis conducted, it was revealed that there were five indicators that students had difficulties with, including illustrating kinematic diagram, illustrating velocity direction, calculating absolute velocity, illustrating velocity polygon, and calculating velocity based on velocity polygon. Those five indicators were related to six generic science aspects, including modelling, symbolic language, laws of causality, logical consistency, scale awareness, and observation. The developed multimedia consists of nine displays of slider-crank mechanism and eight displays of four-bar mechanisms, using .idw, .iam, and .mp4 formats and has been validated by material and media experts. Based on the judgment from the experts, the inventor-based multimedia was worthy to be applied in the course.
Performance analysis of solar panel energy utilization in coffee drying applications Qori Zulia Rahma; Ariyano Ariyano; Farhan Ilham Wira Rohmat; Muhamad Husen; Danishwara Ardyansyach Riyadi
Jurnal Abmas Vol. 25 No. 2 (2025): Jurnal Abmas
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/abmas.v25i2.92020

Abstract

Coffee farmers in Cimenyan Village face significant challenges in the post-harvest drying process due to high rainfall, which reduces quality and lowers income. This research aims to evaluate the performance of an IoT-based coffee-drying system powered by photovoltaic energy, using global solar atlas data. The designed system is a 2 kWp coffee dryer house, which was simulated to assess energy performance, drying efficiency, economic aspects, and environmental impact. The simulation results indicate that the photovoltaic system achieves conversion efficiencies of 80-88% under high irradiance. Drying efficiency reached 54% at an optimal temperature of 50°C, with a specific energy consumption of 0.4-0.6 kWh/kg of water evaporated, which is lower than conventional electric dryers that reach approximately 1.0 kWh/kg. From an economic standpoint, the investment payback period is estimated to be 1.5-3 years with a benefit-cost ratio of 1.4-1.5. Additionally, this system has the potential to reduce CO₂ emissions by 0.5-1.5 tons per year per unit. The system's ability to reduce operational costs, improve product quality, and support sustainable energy transitions in rural Indonesia. Although initial costs and limited technical skills may constrain farmer adoption, cooperative-level implementation, hybrid energy integration, and ongoing training offer promising avenues for future development.   Abstrak Petani kopi di Desa Cimenyan menghadapi tantangan besar dalam proses pengeringan pascapanen akibat tingginya curah hujan, yang menyebabkan penurunan kualitas dan berkurangnya pendapatan. Penelitian ini bertujuan untuk mengevaluasi kinerja sistem pengeringan kopi berbasis IoT yang didukung energi fotovltaik dengan memanfaatkan data global solar atlas. Sistem yang dirancang berupa rumah pengering kopi berkapasitas 2 kWp dan disimulasikan untuk menilai kinerja energi, efisiensi pengeringan, aspek ekonomi, serta dampak lingkungan. Hasil simulasi menunjukkan bahwa sistem fotovoltaik memiliki efisiensi konversi sebesar 80-88 % pada kondisi iradiasi tinggi. Efisiensi pengeringan mencapai 54 % pada suhu optimal 50 °C, dengan konsumsi energi spesifik sebesar 0,4-0,6 kWh/kg air yang diuapkan, lebih rendah dibandingkan pengering listrik konvensional yang mencapai sekitar 1,0 kWh/kg. Dari sisi ekonomi, periode pengembalian investasi diperkirakan 1,5-3 tahun dengan rasio manfaat-biaya sebesar 1,4-1,5. Selain itu, sistem ini berpotensi mengurangi emisi CO₂ sebesar 0,5-1,5 ton per tahun per unit. Kemampuan sistem dalam menekan biaya operasional ini, meningkatkan kualitas produk, serta mendukung transisi energi berkelanjutan di pedesaan Indonesia. Meskipun adopsi oleh petani dapat terkendala biaya awal dan keterampilan teknis, penerapan pada skala koperasi, integrasi energi hibrida, serta pelatihan berkelanjutan menawarkan potensi pengembangan yang menjanjikan di masa depan. Kata Kunci: energi bersih terjangkau; fotovoltaik; Internet of Things; ketahanan ekonomi; pertanian berkelanjutan