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All Journal Majalah Ilmiah MOMENTUM JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN JURNAL CRANKSHAFT JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI Integrated Mechanical Engineering Journal Nozzle : Journal Mechanical Engineering Jurnal Polimesin
Muhammad Untung Zaenal Priyadi
Jakarta Global University
Automotive Engineering Control & Systems Engineering Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Karakteristik Campuran Bahan Bakar Petralite-Ethanol-Minyak Cengkeh Terhadap Level Suara dan Distribusi Temperatur Gas Emisi Exhaust System Priyadi, Muhammad Untung Zaenal; Gamayel, Adhes; Saleh, Yasya Khalif Perdana; Fikri, Muhammad Luqman Saiful
JURNAL ILMIAH MOMENTUM Vol 20, No 1 (2024)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v20i1.10964

Abstract

Penelitian ini mengeksplorasi pengaruh campuran bahan bakar Petralite-Ethanol-Minyak Cengkeh terhadap level suara dan distribusi temperatur pada sistem knalpot. Pengujian dilakukan menggunakan mesin uji dengan variasi campuran dan kecepatan untuk mengevaluasi dampak dari campuran bahan bakar tersebut. Hasil menunjukkan bahwa campuran bahan bakar ini menghasilkan campuran bahan bakar Petralite dengan tambahan ethanol 9% dan minyak cengkeh 1 % cenderung menghasilkan level suara yang lebih rendah dibandingkan dengan bahan bakar konvensional pada kecepatan putaran mesin dan diameter sistem pembuangan tertentu. Saat RPM meningkat, waktu yang tersedia untuk setiap siklus pembakaran menjadi lebih pendek. Rerata level suara yang dihasilkan oleh berbagai campuran bahan bakar adalah 82.9 dB yaitu 1,6 % lebih tinggi daripada yang dari P100 pada RPM 2000. Pada RPM 3000 level suara yang dihasilkan berbagai campuran bahan bakar adalah 1,3 % lebih tinggi daripada yang dari P100. Campuran bahan bakar Ethanol-Minyak Cengkeh pada Petralite dapat menurunkan temperatur emisi gas buang rata-rata 6,5 % daripada yang dari bahan bakar tanpa campuran pada knalpot OEM dan RPM 2000. Kemudian dengan knalpot OEM pada RPM 3000 temperatur emisi gas buang 8,5 % lebih tinggi daripada yang dari P100.
Analisa Hasil Sambungan Las ( Pipa STKM 13B Dan Plat SPH 440) Dengan Pengujian Tarik dan Photomacro Fikri, Luqman; Simamora, Yulianto; Priyadi, Muhammad Untung Zaenal; Saleh, Yasya Khalif Perdana; Zaenudin, Mohammad; Mulyono, Sidik; Gamayel, Adhes; Triwiyanto, Askar; Jujur, I nyoman
JURNAL CRANKSHAFT Vol 7, No 2 (2024): Jurnal Crankshaft Vol.7 No.2 (2024)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v7i2.12657

Abstract

ABSTRACTGMAW (Gas Metal Arc Welding) is a fast, versatile welding technique that can be used in various positions, but it often results porosity in welded joints.This research aims to analysis of the welded joints of STKM13B pipe and SPD 440 plate using tensile and micro testing, using welding a current of 18 and varying voltages of 110, 130, and 150. The results is the shape of the welded joint of the plate and pipe is perfectly connected, the tensile test results showed that the ultimate strength values for specimen 1, 2, 3 (A110/V18, A130/V18, A150/V18) were (18,959, 27,886, 40,005 N) respectively. The highest ultimate strength values were obtained from the specimens (A150/V18) while the lowest ultimate strength value was obtained from specimen (A110/V18). The use of welding current strongly correlates with ultimate strength value and photomacro results, with higher currents resulting in higher density levels, minimizing porosity, and increasing ultimate strength. Keywords: GMAW Welding, Tensile Test, Macro Optical Test. 
Performa Termal Kondensor Udara pada Wind Tunnel: Evaluasi Perpindahan Panas Priyadi, M. Untung Zaenal; Saleh, Yasya Khalif Perdana; Fikri, Muhammad Luqman Saiful; Muddhar Fathkhur Rohman; Leo Saputra
Jurnal Permadi : Perancangan, Manufaktur, Material dan Energi Vol 6 No 03 (2024): JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/permadi.v6i03.155

Abstract

Heat transfer in air condenser systems is a critical aspect in various industrial applications, especially refrigeration and air conditioning systems. The thermal efficiency of condensers is greatly influenced by airflow characteristics, but airflow velocity optimization remains a challenge due to the trade-off between improved heat transfer and energy consumption. Although previous research has examined various aspects of condenser design, there is still a need to explore the optimal limit of airflow velocity that can maximize thermal efficiency without excessively increasing system workload. This study aims to evaluate the thermal performance of an air condenser in a wind tunnel, focusing on the effects of airflow velocity variations on heat transfer rate and thermal efficiency. The experimental method uses a wind tunnel with dimensions of 280x28x28 cm, equipped with a precise temperature and flow velocity measurement system. The flow velocity was varied from 0.8 to 1.8 m/s. The results showed a significant increase in the heat transfer coefficient (h) and heat transfer rate (Q) as the flow velocity increased. Analysis of Reynolds and Nusselt numbers revealed the transition of the flow from laminar to turbulent, which contributed to the increase in heat transfer efficiency. Comparison of experimental results with simulations showed good agreement in the middle velocity range, but there were deviations at extreme velocities. In conclusion, increasing the airflow velocity proved effective in improving the thermal performance of the condenser, but further optimization is required to balance the thermal efficiency with the energy consumption of the system.
Analisa Pengaruh Variasi Rasio Katalis Zeolit Terhadap Pirolisis Limbah Kabel dan Limbah Ban Zaenudin, Mohamad; Fadhlullah, Muhamad Vikri; Gamayel, Adhes; Priyadi, Muhammad Untung Zaenal
Nozzle : Journal Mechanical Engineering Vol 13, No 2 (2024): Nozzle : Journal Mechanical Engineering
Publisher : Politeknik Harapan Bersama Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/nozzle.v13i2.7840

Abstract

The accumulation of waste in the environment has become a critical issue, necessitating effective solutions, one of which is pyrolysis technology for treating waste such as tires and cables. Pyrolysis is a thermal degradation process that occurs under limited oxygen conditions, producing gas, tar, and char as byproducts. This study aims to evaluate the effect of varying zeolite catalyst ratios on the amount of oil produced and the production rate in the pyrolysis process of cable waste, tire waste, and their mixture. The catalyst ratios used in this study were 100, 200, and 300 grams, along with a control condition without a catalyst. The results indicated that the use of 300 grams of zeolite catalyst produced the highest oil yield, with 141 ml from cable waste, 233 ml from tire waste, and 238 ml from the mixed waste. In contrast, the absence of a catalyst yielded the lowest oil production, with 64 ml from cable waste, 85 ml from tire waste, and 137 ml from the mixed waste. These findings suggest that the use of zeolite catalyst significantly enhances both the production rate and quantity of oil compared to the condition without catalyst.
Pengaruh Variasi Jumlah Lubang Pisau Pemotong Kentang Pada Mesin Pengupas Dan Pemotong Kentang Sederhana Terhadap Kapasitas Dan Kualitas Pemotongan Habibullah, Muhammad; Zaenudin, Mohamad; Priyadi, M. Untung Zaenal
Integrated Mechanical Engineering Journal Vol. 2 No. 2 (2024): Integrated Mechanical Engineering Journal (IMEJOUR) Vol. 2 No 2 2024
Publisher : Jurusan Teknik Mesin Universitas Global Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/imejour.v2i2.60

Abstract

Pada industri pengolahan makanan, efisiensi dan kualitas mesin pemotong kentang menjadi faktor krusial dalam produktivitas. Penelitian ini bertujuan untuk menganalisis pengaruh variasi jumlah lubang pada pisau pemotong kentang terhadap kapasitas efektif pemotongan, efisiensi pemotongan, dan keseragaman hasil potongan. Eksperimen dilakukan menggunakan mesin pengupas dan pemotong kentang sederhana dengan tiga variasi pisau pemotong (36, 64, dan 144 lubang) dan tiga variasi tekanan pneumatik (6, 7, dan 8 bar). Hasil penelitian menunjukkan bahwa pisau dengan 144 lubang pada tekanan 8 bar menghasilkan kapasitas efektif pemotongan tertinggi (123,51 kg/jam) dan efisiensi pemotongan tertinggi (97,71%). Namun, peningkatan jumlah lubang juga menyebabkan sedikit penurunan dalam keseragaman hasil potongan, dengan nilai error tertinggi 0,5048% pada pisau 144 lubang dan terendah 0,5019% pada pisau 36 lubang. Penelitian ini menyimpulkan bahwa peningkatan jumlah lubang pada pisau pemotong kentang dapat meningkatkan kapasitas dan efisiensi pemotongan secara signifikan, meskipun dengan sedikit dampak pada keseragaman hasil potongan.
Analisis Frame Body Pada Mesin Pengupas Dan Pemotong Kentang Sederhana Hadikusuma, Rama; Zaenudin, M; Priyadi, M. Untung Zaenal
Integrated Mechanical Engineering Journal Vol. 2 No. 2 (2024): Integrated Mechanical Engineering Journal (IMEJOUR) Vol. 2 No 2 2024
Publisher : Jurusan Teknik Mesin Universitas Global Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/imejour.v2i2.62

Abstract

Pada industri pengolahan makanan, efisiensi dan kualitas mesin pemotong kentang menjadi faktor krusial dalam produktivitas. Penelitian ini bertujuan untuk menganalisis frame body pada mesin pengupas dan pemotong kentang sederhana menggunakan simulasi statis dan perhitungan teoritis. Analisis dilakukan menggunakan Software Autodesk Inventor dengan tiga jenis material: Carbon Steel S355, Stainless Steel 304, dan Aluminium 6061. Dengan beban 83,35 N, material Carbon Steel S355 menunjukkan performa terbaik dengan nilai von Mises stress maksimum 1,717 MPa, displacement 0,004826 mm, dan safety factor 15. Pada pembebanan maksimum 257,64 N, material ini tetap menunjukkan kestabilan dengan von Mises stress 3,505 MPa, displacement 0,009916 mm, dan safety factor 15. Hasil penelitian menyimpulkan bahwa Carbon Steel S355 merupakan material yang paling sesuai untuk frame body mesin ini karena memiliki nilai von Mises stress yang tidak melebihi yield strength dan faktor keamanan yang memadai.
Perancangan dan Simulasi Pembebanan pada Rangka Mesin Penghancur dan Ekstruder Filamen Saleh, Yasya Khalif Perdana; Fitrah Agustian; Priyadi, M Untung Zaenal; Muhammad Luqman Saiful Fikri; Mohamad Zaenudin; I Nyoman Jujur
Jurnal Permadi : Perancangan, Manufaktur, Material dan Energi Vol 7 No 01 (2025): JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/permadi.v7i01.185

Abstract

Meningkatnya limbah plastik mendorong pengembangan teknologi daur ulang yang berkelanjutan, salah satunya adalah konversi limbah polimer menjadi filamen untuk pencetakan 3D. Penelitian ini bertujuan untuk merancang dan mensimulasikan pembebanan pada rangka mesin penghancur dan ekstruder filamen sebagai bagian dari sistem pengolahan limbah plastik. Proses penelitian meliputi identifikasi kebutuhan pengguna, penyusunan spesifikasi teknis, pengembangan dan seleksi konsep desain menggunakan metode matriks keputusan, hingga analisis numerik berbasis Finite Element Analysis (FEA). Dari tiga alternatif desain, konsep 3 terpilih dengan nilai evaluasi tertinggi (29 dari 40). Simulasi struktural dilakukan pada tiga jenis material: Aluminium 6061, Steel AISI 5140, dan Steel AISI 1018 HR. Hasil menunjukkan bahwa Steel AISI 5140 memiliki performa struktural terbaik dengan tegangan Von Mises terendah (40,18 MPa), faktor keamanan tertinggi (10,41), dan displacement yang relatif rendah (1,215 mm). Dengan mempertimbangkan kekuatan, kekakuan, dan margin keamanan, Steel AISI 5140 dipilih sebagai material optimal untuk pembuatan prototipe. Penelitian ini membuktikan bahwa pendekatan berbasis pemodelan dan simulasi mampu menghasilkan desain yang andal dan siap untuk tahap pengembangan lebih lanjut.
Experimental investigation of perforated and non-perforated Delta Winglet Pairs for heat transfer and pressure drop optimization Yafid Effendi; Syaiful Syaiful; Mohamad Djaeni; Muhammad Untung Zaenal Priyadi
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.v23i3.6627

Abstract

This study experimentally investigates the impact of Delta Winglet Pairs (DWPs) on heat transfer and friction factor in a rectangular duct. Configurations varied by the number of DWP pairs (one, two, and three) and the presence of perforations on the winglet.  The performance was evaluated using the Nusselt number ratio (Nu/Nu₀) and friction factor ratio (f/f₀), compared to a smooth baseline. Results show that non-perforated DWPs enhanced heat transfer more effectively, with a maximum 27% higher Nusselt number than perforated ones. Increasing the number of DWP pairs improved thermal performance further, aided by higher airflow velocities that enhanced fluid mixing. In terms of pressure loss, the friction factor decreased with increasing velocity, while more DWPs increased pressure drop. Perforated DWPs reduced average friction by 47% compared to non-perforated ones, due to jet flow effects. Evaluation of the Thermal Enhancement Factor (TEF) revealed that although both configurations benefit from higher airflow, non-perforated DWPs achieved a 13.8% higher TEF than the perforated type. These results suggest that while non-perforated DWPs are optimal for maximum heat transfer, perforated DWPs offer a more favourable trade-off when pressure loss must be minimized.
ANALISIS PERBAIKAN DOWNTIME PADA AUTOMATIC STACKING MACHINE DALAM OPTIMALISASI PROSES PRODUKSI DENGAN METODE DMAIC Bahar, Shofwan; Damayanti, Vita Ayu; Priyadi, M. Untung Zaenal
JURNAL CRANKSHAFT Vol 8, No 3 (2025): Jurnal Crankshaft Vol. 8 No. 3 (2025)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v8i3.15708

Abstract

Automatic Stacking Machine merupakan bagian penting dalam proses produksi baterai di PT. XYZ, khususnya dalam proses penyusunan plat positif yang dilapisi separator. Namun, proses ini sering mengalami downtime akibat keterbatasan kapasitas magazine house dan kesalahan operasional yang menyebabkan terganggunya kontinuitas produksi. Penelitian ini bertujuan untuk menganalisis penyebab downtime serta merancang solusi perbaikan menggunakan metode DMAIC (Define, Measure, Analyze, Improve, Control). Hasil analisis menunjukkan bahwa kapasitas magazine house yang terbatas dan desain yang tidak ergonomis menjadi faktor utama penyebab berhentinya mesin. Dengan melakukan re-design pada magazine untuk meningkatkan kapasitas dan efisiensi pengisian plat, waktu operasional mesin dapat diperpanjang dan frekuensi intervensi operator berkurang. Penerapan solusi ini berpotensi meningkatkan output produksi, mengurangi kerugian waktu hingga 57 plat per jam, serta menurunkan beban kerja operator. Penelitian ini menunjukkan bahwa pendekatan sistematis melalui DMAIC efektif dalam mengatasi permasalahan teknis di lini produksi.
FUEL PROPERTIES AND DIESEL ENGINE EXHAUST GAS TEMPERATURE OF BIODIESEL-CALOPHYLLUM INOPHYLLUM-ESSENTIAL OIL MIXTURE Gamayel, Adhes; Priyadi, Muhammad Untung Zaenal
Jurnal Dinamika Vokasional Teknik Mesin Vol. 9 No. 1 (2024)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v9i1.72267

Abstract

This research investigates the properties and performance of fuel blends comprising biodiesel, Calophyllum inophyllum oil (Nyamplung), and essential oils. Biodiesel, a renewable energy source, has gained significant attention due to its low sulfur content, high calorific value, and biodegradability. Experimental investigations involved blending biodiesel with Nyamplung oil and essential oils (clove oil, pine oil, and turpentine oil) in varying proportions. Fuel properties, including density, viscosity, and flash point, were analyzed to assess combustion characteristics. Additionally, engine performance parameters such as torque and exhaust gas temperature (EGT) were evaluated to understand combustion efficiency and engine health. The results revealed that the addition of Nyamplung oil and essential oils increased the density and viscosity of the fuel blends compared to pure biodiesel, impacting atomization and combustion processes. Despite higher viscosity potentially causing ignition delay, flash points decreased due to the presence of essential oils, enhancing safety during storage and handling. Torque measurements indicated variations in engine performance among fuel mixtures, with incomplete combustion observed in blends containing essential oils. EGT measurements further highlighted differences in combustion completeness, with lower temperatures observed in pure biodiesel due to improved atomization and complete combustion.
Co-Authors Adhes Gamayel Damayanti, Vita Ayu Fadhlullah, Muhamad Vikri Fikri, Luqman Fikri, Muhammad Luqman Saiful Fitrah Agustian Hadikusuma, Rama I Nyoman Jujur I Nyoman Jujur Leo Saputra Mohamad Djaeni Mohamad Zaenudin Mohamad Zaenudin Muddhar Fathkhur Rohman Muhammad Habibullah mulyono, Sidik Simamora, Yulianto Syaiful . Triwiyanto, Askar Yafid Effendi Yasya Khalif Perdana Saleh Zaenudin, Mohammad