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Analisa pengaruh pendingin panel surya 50 WP terhadap daya yang dihasilkan Muhamad Iqbal Achmad; Afdal Syarif; Dedy Ashari; Zuliadin Zuliadin
Sultra Journal of Mechanical Engineering Vol 2 No 1 (2023): Sultra Journal of Mechanical Engineering
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Sulawesi Tenggara

Energi matahari dapat dimanfaatkan sebagai energi alternatif yang akan diubah menjadi energi listrik dengan menggunakan panel surya. Beberapa penelitian, dijelaskan bahwa kenaikan dan penurunan temperatur pada permukaan sel surya mempengaruhi daya keluaran yang akan dihasilkan. Pada pengujian ini menggunakan dua buah panel surya dengan kapasitas sebesar 50 WP (Watt Peak). Di mana salah satu panel dilengkapi dengan sistem pendingin berupa air yang dialirkan pada permukaan panel surya sehingga dapat diperoleh nilai efisiensi panel surya dengan sistem pendingin dan tanpa sistem pendingin. Tujuan penelitian ini untuk mengetahui pengaruh penggunaan pendingin terhadap besarnya daya dan efisiensi dari panel surya. Pada hari pertama pengujian, untuk panel surya berpendingin diperoleh rerata daya sebesar 23,74 Watt, dan untuk panel surya tidak berpendingin diperoleh rerata daya sebesar 16,76 Watt, terdapat selisih daya sebesar 6,98 Watt. Selanjutnya untuk nilai efisiensi panel surya berpendingin sebesar 5,42%. Nilai efisiensi tersebut lebih besar jika dibandingkan dengan panel surya tidak berpendingin yang memiliki efisiensi sebesar 3,96%. Pengujian hari kedua dan ketiga juga menunjukkan hal yang sama, di mana rerata daya dan efisiensi yang dihasilkan oleh panel surya berpendingin lebih tinggi dibandingkan dengan panel surya tidak berpendingin. Hal ini menunjukkan bahwa penggunaan pendingin pada panel surya sangat berpengaruh pada tegangan, arus dan daya yang dihasilkan panel surya terhadap radiasi intensitas cahaya matahari.

Variasi Waktu Pengasapan Pada Bahan Komposit Serat Sabut Kelapa Terhadap Kekuatan Tarik Muriman, La Ode Asman; Syarif, Afdal; Ashari, Dedy; Hasfandi, Hasfandi
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 8, No 3 (2023): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/enthalpy.v8i3.43008

Plant fibers used as composite materials have been carried out a lot, but they are not optimal so further research is needed to determine the parameters for making composites. Besides being cheap and easy to find, the use of coconut fiber can also reduce environmental pollution resulting from coconut tree waste. The purpose of this study was to determine the tensile strength of coco fiber composite materials with variations in fumigation. Coco fiber which has previously been smoked will be made into composites which will later be subjected to mechanical test. From the results of the smoked, it was obtained that the water content in the coco fiber decreased by an average of 7% per hour. At 3 hours of smoking time, the water content value was 11.2%, while at 5 hours of smoking time, the water content in the fiber was at 9.7%. The elasticity value for the composite material was 379.1 N/mm2 for the fiber materials which was smoked for 3 hours, this value increased to 532.1 N/mm2 for 4 hours of smoked. There was an increase in the elasticity value of the composite material by 40.3% between the condition of the fiber which was smoked for 3 hours and the fiber which was smoked for 4 hours. Kata kunci: Coco fiber, composite, fumigation, tensile test

Studi Analitik Penambahan Reflektor Pelat Datar Sudut 60˚ pada Pemanas Air Tenaga Surya Ashari, Dedy; Ichsani, Djatmiko
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 8, No 2 (2023): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/enthalpy.v8i2.36117

The condition of electrical energy in Indonesia is increasing every year, one of which is used as a water heater. Various methods have been used to increase the efficiency of solar water heaters, including the use of flat plate reflectors. This research was carried out analytically to determine daily solar radiation intensity data on solar collectors with the addition of a 60˚ angle reflector. The results obtained in conditions without reflectors, the daily average solar radiation value produced by solar collectors is 1136 W/m2. Then for the condition of the reflector angle of 60˚, the daily average solar radiation value is recorded at 1386 W/m2. There is a difference of 250 W/m2 between the two conditions. The daily solar radiation intensity value is also calculated using the area method, the result is a daily solar radiation value of 2.542 kWh/m2 in conditions without the reflectors. Furthermore, at a reflector angle of 60˚, the resulting solar radiation value increases by 6% to 2.712 kWh/m2. The addition of a flat plate reflector at an angle of 60˚ is proven to increase the daily solar radiation intensity value that can be received by a solar water heater.

Analisis Perbandingan Kinerja Injektor Mesin Wartsila W20V34DF pada Beban 0 kW dan 3000 kW Menggunakan Simulasi CFD Sutrisno, Budi; Ashari, Dedy; Yunus, La Ode Ichlas Syahrullah; Gamsir, La Ode Abdul; Ibrahim, Akhmad Fadli; Djuli, Yuvita Satriani
Piston: Jurnal Teknologi Vol 10 No 1 (2025): June 2025
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v10i1.96

Injector performance is a crucial factor in combustion efficiency and emission control in diesel engines, especially in power plant applications such as the Baubau 30MW PLTMG using the Wartsila W20V34DF engine. Pressure fluctuations, non-ideal fuel flow patterns, and uneven temperature distribution inside the injector can have a significant impact on the atomization and combustion process, which in turn affects overall engine performance. Therefore, a thorough understanding of the fluid dynamics inside the injector is essential for optimization and maintenance. This study aims to analyze the injector performance on the Wartsila W20V34DF engine by understanding the flow distribution, fluid velocity in the internal injector area using the Computational Fluid Dynamics (CFD) simulation method. Specifically, this study attempts to identify fuel flow characteristics and potential areas where injector performance may be less than optimal. Through CFD simulation using Solidworks, a detailed picture of the complex fuel flow pattern inside the injector is obtained. In the comparative analysis of the performance of the Wartsila engine injector at 0 kW and 3000 kW load conditions, CFD simulations were carried out with fuel flow velocity parameters, where the 0 kW load condition reached 4.1 m/s with 100 iterations and the 3000 kW speed reached 9.5 m/s with 100 iterations. Showing variations in the distribution of fluid velocity, especially around the injector hole, which is a crucial area for the fogging process. Areas with high velocities that support effective fogging were identified, but also flow patterns that can affect spray distribution. This analysis provides insight into how the internal design of the injector affects fluid dynamics, highlighting the importance of injector geometry for optimal performance. As a continuation of this study, it is recommended to conduct experimental validation of the CFD simulation results to verify the accuracy of the model. In addition, future research can consider factors such as variations in fuel composition, the effects of injector material degradation due to long-term use, and the interaction between injector spray and air in the combustion chamber to gain a more comprehensive understanding.

Analisis Kebutuhan Energi dari Minyak Goreng Bekas menjadi Bahan Bakar Biodiesel B40, B60, dan B80 menggunakan Kompor Minyak Bekas Atina, La; Syarif, Afdal; Achmad, Muhammad Iqbal; Baride, La; Ashari, Dedy
Piston: Jurnal Teknologi Vol 10 No 1 (2025): June 2025
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v10i1.109

Stoves that use used oil as fuel are widely used as a tool to utilize liquid waste such as oil into fuel. The aim of this study is focused on comparing the energy requirements and efficiency of various fuels sourced from used cooking oil through transesterification. This research utilizes used cooking oil as an alternative fuel using a used oil stove. Waste cooking oil is processed into biodiesel fuel through a transesterification process into three variations, B40, B60, and B80. Testing of fuel variations on used oil stoves showed that the energy requirement value for B40 fuel had a higher value (0.27 kcal/second) than B60 fuel (0.22 kcal/second) and B80 fuel (0.18 kcal/second). The results shown for the combustion efficiency of B40 fuel have a higher average value (18.9%) than B60 fuel (17.2%) and B80 fuel (14.9%). This shows that the percentage of transesterification results of a mixture of used cooking oil and diesel fuel that is increasing, is seen to experience a decrease in the value of energy requirements and combustion efficiency. The highest combustion efficiency value is found in B40 fuel which has a mixture percentage of 40% transesterification oil and 60% diesel fuel. There was a decrease in combustion efficiency of 8.9% from B40 fuel to B60 fuel, and a decrease in combustion efficiency of 21.2% from B40 fuel to B80 fuel.

Analisis Kebutuhan Material Fiberglass pada Pembangunan Kapal Perikanan Type Longline Berbahan Fiberglass pada Dinas Perikanan Kabupaten Buton Selatan Samaluddin Samaluddin; Rahmawati Djunuda; La Ode Abdul Gamsir; Dedi Ashari
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 4 No. 2 (2025): Agustus : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v4i2.6057

Fiberglass is a composite material composed of a mixture of various chemical substances that react and harden over a specific period of time. The use of fiberglass material composition in the construction of fishing vessels provides durability as a composite material and also influences the overall cost of building fiberglass boats. Construction costs vary significantly depending on the type of vessel, its size, the technology used, and the location of construction. The objective of this study is to determine the volume of fiberglass material used in the construction of fishing vessels. Data collection techniques included observation, interviews, and documentation, followed by a literature review related to the calculation of fiberglass material usage in boat construction with fiberglass structure. This research employs a quantitative descriptive method, which describes the subject under study based on actual conditions and draws conclusions from observed phenomena using numerical statistics. Based on the research findings, it was determined that the construction of one (1) unit of fiberglass fishing vessel requires the following materials: Chopped Strand Mat 300 (CSM 300) amounting to 101.53 kg, Chopped Strand Mat 450 (CSM 450) amounting to 130.352 kg, Woven Roving 600 (WR 600) amounting to 116.130 kg, Resin amounting to 657.171 kg, and Catalyst amounting to 6.969 kg.

Implementasi Edukasi Mitigasi dan Pemasangan Jalur Evakuasi di Kawasan Wisata Pantai Mutiara Desa Gumanano, Sulawesi Tenggara Syahrullah Yunus, La Ode Ichlas; Ashari, Dedy; Abdul Gamsir, La Ode; Yocing, Panci; Habriani, Habriani; Syah, Gahrudin; Eko, La
Bestari: Jurnal Pengabdian Kepada Masyarakat Vol 5, No 1 (2025)
Publisher : Sekolah Tinggi Keguruan dan Ilmu Pendidikan (STKIP) Melawi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46368/dpkm.v5i1.3958

Abstract: Pantai Mutiara, located in Gumanano Village, Mawasangka District, Central Buton Regency, is a popular coastal tourist destination frequented by local visitors. However, the area lacks a comprehensive implementation of Occupational Health and Safety (OHS) principles, particularly in anticipating potential accidents and emergency situations common in coastal tourism environments. This community service program aims to raise awareness among local residents and tourism managers regarding OHS-based disaster mitigation and to establish clear evacuation routes tailored to site-specific hazards. The activities included hazard identification, safety education for tourism environments, basic first aid and self-evacuation training, and the installation of safety signs and evacuation route markers. The outcomes indicate an increase in public understanding of accident risks in coastal areas and appropriate response measures. This initiative contributes to fostering a safety culture in tourism areas and serves as a replicable model for other coastal destinations lacking integrated OHS systems.Keywords: tourism safety, OHS, risk mitigation, emergency evacuation, Pantai Mutiara Abstrak: Pantai Mutiara di Desa Gumanano, Kecamatan Mawasangka, Kabupaten Buton Tengah merupakan destinasi wisata unggulan yang ramai dikunjungi wisatawan lokal. Namun, kawasan ini belum sepenuhnya menerapkan prinsip-prinsip Kesehatan dan Keselamatan Kerja (K3), khususnya dalam mengantisipasi potensi kecelakaan dan kondisi darurat di lingkungan wisata pantai. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan kesadaran masyarakat dan pengelola wisata terhadap pentingnya mitigasi risiko berbasis K3, serta menyiapkan jalur evakuasi yang sesuai dengan potensi bahaya di lokasi. Metode kegiatan meliputi identifikasi potensi bahaya (hazard identification), edukasi K3 di lingkungan wisata, pelatihan pertolongan pertama dan evakuasi mandiri, serta pemasangan rambu peringatan dan jalur evakuasi. Hasil kegiatan menunjukkan meningkatnya pemahaman masyarakat terhadap risiko kecelakaan kerja di area wisata dan langkah-langkah penanggulangannya. Kegiatan ini berkontribusi dalam membentuk budaya keselamatan di kawasan wisata dan dapat direplikasi di lokasi wisata serupa yang belum memiliki sistem K3 terpadu.Kata kunci: K3 wisata, keselamatan pengunjung, mitigasi risiko, evakuasi darurat, Pantai Mutiara

Analisa pengaruh pendingin panel surya 50 WP terhadap daya yang dihasilkan Achmad, Muhammad; Syarif, Afdal; Ashari, Dedy; Zuliadin, Zuliadin
Sultra Journal of Mechanical Engineering Vol. 2 No. 1 (2023): Sultra Journal of Mechanical Engineering
Publisher : Program Studi Teknik Mesin, Universitas Sulawesi Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar

Energi matahari dapat dimanfaatkan sebagai energi alternatif yang akan diubah menjadi energi listrik dengan menggunakan panel surya. Beberapa penelitian, dijelaskan bahwa kenaikan dan penurunan temperatur pada permukaan sel surya mempengaruhi daya keluaran yang akan dihasilkan. Pada pengujian ini menggunakan dua buah panel surya dengan kapasitas sebesar 50 WP (Watt Peak). Di mana salah satu panel dilengkapi dengan sistem pendingin berupa air yang dialirkan pada permukaan panel surya sehingga dapat diperoleh nilai efisiensi panel surya dengan sistem pendingin dan tanpa sistem pendingin. Tujuan penelitian ini untuk mengetahui pengaruh penggunaan pendingin terhadap besarnya daya dan efisiensi dari panel surya. Pada hari pertama pengujian, untuk panel surya berpendingin diperoleh rerata daya sebesar 23,74 Watt, dan untuk panel surya tidak berpendingin diperoleh rerata daya sebesar 16,76 Watt, terdapat selisih daya sebesar 6,98 Watt. Selanjutnya untuk nilai efisiensi panel surya berpendingin sebesar 5,42%. Nilai efisiensi tersebut lebih besar jika dibandingkan dengan panel surya tidak berpendingin yang memiliki efisiensi sebesar 3,96%. Pengujian hari kedua dan ketiga juga menunjukkan hal yang sama, di mana rerata daya dan efisiensi yang dihasilkan oleh panel surya berpendingin lebih tinggi dibandingkan dengan panel surya tidak berpendingin. Hal ini menunjukkan bahwa penggunaan pendingin pada panel surya sangat berpengaruh pada tegangan, arus dan daya yang dihasilkan panel surya terhadap radiasi intensitas cahaya matahari.

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