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All Journal Prosiding Semnastek Jurnal Dinamika Penelitian Industri JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Jurnal Ilmiah Teknik Mesin "MEKANIK" Mechanical Engineering for Society and Industry IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Aceh International Journal of Science and Technology IRA Jurnal Pengabdian Kepada Masyarakat
Jufrizal Jufrizal
Universitas Medan Area
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation Other

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Pengaruh Variasi Bukaan Katup terhadap Kinerja Sistem pada Konfigurasi Pompa Seri dan Paralel David Jomantes Munthe; Jimy Lingga; Jufrizal Jufrizal; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 1 (2025): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i1.185

Abstract

Centrifugal pumps are widely used in industry and civil engineering to move fluids by increasing pressure efficiently. This study analyzes the effect of valve opening variations on series and parallel pump configurations simultaneously using a laboratory experiment method with two repetitions. The results show that parallel pump configurations are generally more efficient than series, especially at 50% and 25% valve openings. The maximum efficiency is achieved at 75% valve opening with a value of around 33% for both configurations. Valve opening settings and pump configuration selection are very important to improve the performance and efficiency of pressure piping systems. It is recommended for small industries to use parallel pump configurations with optimal valve opening operations of around 75% for energy efficiency and cost savings. Developing an automatic valve opening control system is also recommended to maximize efficiency, extend equipment life, and optimize fluid distribution.
Analisis Pengaruh Penggunaan LPG sebagai Bahan Bakar Alternatif terhadap Performansi dan Efisiensi Mesin Bensin Irvan Hendrawan Surya Dinata; Jufrizal Jufrizal; Darianto Darianto; Tino Hermanto; Bobby Umroh; Nurdiana Nurdiana
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.260

Abstract

This study investigates the effect of using Liquefied Petroleum Gas (LPG) as an alternative fuel to Pertalite on the performance, energy efficiency, and operating cost of a 6.5 HP gasoline engine-driven water pump. Experiments were conducted at three engine operating conditions: minimum, average, and maximum engine speeds. The evaluated parameters included engine speed, water discharge, hydraulic power, shaft power, brake specific fuel consumption (BSFC), thermal efficiency, overall system efficiency, and fuel operating costs. The results indicate that the pump's hydraulic performance, as measured by water discharge and hydraulic power, is not significantly affected by the type of fuel used. However, engines that use Pertalite tend to have slightly better thermal and system efficiencies than LPG engines. From an economic perspective, LPG offers a substantial advantage, with lower operating and energy costs per unit of power. Therefore, despite Pertalite's slightly superior technical efficiency, LPG is a more economical alternative fuel for long-duration water pump applications.
Analisis Efisiensi Thermal dan Konsumsi Bahan Bakar pada Burner Kompor SNI Sebagai Dasar Acuan Perencanaan Burner Mesin Stirling Rahmadsyah Lubis; Jufrizal Jufrizal; Supriatno Supriatno; Nurdiana Nurdiana
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 2 (2024): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i2.96

Abstract

This study aims to evaluate the performance of an LPG stove burner by assessing the flame temperature, fuel consumption, burner power, and thermal efficiency. The method employed is an experimental approach using a water boiling technique. The test materials used include 3 kg of LPG gas and water. The equipment utilized includes an SNI-compliant cooking stove, a pot, a digital scale, a rotameter flow meter, a gas regulator and hose, a stopwatch, a UT320D thermometer controller, an NPT stainless steel thermometer, and thermocouple sensor cables. The results show that during the first test with the stove set to the minimum setting, the average flame temperature at the burner reached 559.005 °C, with a maximum value of 589.2 °C. In the second test, with the stove set to the maximum setting, the average flame temperature reached 714.78 °C, with a maximum value of 769.3 °C. Fuel consumption was recorded at 0.391 kg in the first test and 0.545 kg in the second test. The burner power output was 1.754 kW in the first test and 2.225 kW in the second test. The thermal efficiency of the burner was recorded at 50.07% in the first test, increasing to 52.85% in the second test. The measurement and analysis of thermal efficiency and fuel consumption in this study can serve as a crucial guide in designing and developing burners for Stirling engines.
Pengujian Kinerja Cooling Water untuk Mesin Stirling tipe Gamma Skala Kecil Indra Prasetio; Jufrizal Jufrizal; Supriatno Supriatno
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 3 (2024): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i3.146

Abstract

This study aims to evaluate and analyze the performance of cooling water in a small-scale Gamma-type Stirling engine. The research method employed was an experimental approach. The test results show that the inlet water temperature was 27.6 °C, while the average outlet water temperature reached 92.33 °C after 60 minutes of testing. Cooling water with an inlet temperature of 27.6 °C reduced the average heat source temperature from 484.51 °C to 64.78 °C on the compression chamber side. At an airflow rate of 0.006 m³/s, the average cooling effectiveness was recorded at 13%, with the highest value of 19.1% observed at the 55th minute of testing. This study concludes that cooling water effectively reduces the heat source temperature and improves thermal efficiency in a small-scale Gamma-type Stirling engine.
Analisis Efisiensi Termal Kompor Biomassa Tipe Gasifier Downdraft dengan Variasi Massa Campuran Arang Kayu dan Wood Pellet Joel Hasoloan Simatupang; Jufrizal Jufrizal; Supriatno Supriatno
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.201

Abstract

This study analyzes the thermal efficiency of a downdraft gasifier-type biomass stove using various fuel masses of wood charcoal and wood pellets. The Water Boiling Test (WBT) method was applied with fuel masses of 0.5 kg, 0.75 kg, 1 kg, and 1.5 kg. Observed parameters included thermal efficiency, fuel consumption rate (FCR), power input, and power output. The highest thermal efficiency, 14%, was achieved with 1.5 kg of wood pellets, while charcoal showed a decrease in efficiency at 1 kg. FCR increased with charcoal but decreased with wood pellets, indicating better combustion efficiency. Power input and output increased with higher fuel mass. These findings highlight the importance of fuel type and mass optimization in improving biomass stove performance, thereby supporting Indonesia's transition to renewable energy.
Evaluasi Performa Termal dan Listrik Robinson Engine dengan Fluida Kerja Uap Bertekanan Rendah dari Boiler Kecil Murahmad Parulian Marbun; Jufrizal Jufrizal; Indra Hermawan
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.204

Abstract

This study evaluates the thermal and electrical performance of a Robinson steam engine powered by low-pressure steam (≤ 2.5 bar) from a small boiler. Experiments were conducted by varying the steam pressure from 0.5 to 2.5 bar to observe its effects on voltage, current, and power output. Results show that increasing steam pressure raised the voltage from 0 V to 4.52 V and the power output from 0 W to 6.1 W. The total electrical energy generated was 9.726 kJ, with an average conversion efficiency of 0.2127% and a peak efficiency of 0.3045% at 2.5 bar. Despite the low efficiency, the system demonstrates potential for small-scale power generation and educational use in energy conversion studies.
Analisis Proksimat dan Nilai Kalor Biopelet Tandan Kosong Kelapa Sawit (TKKS) sebagai Sumber Energi Terbarukan Eva Riana Br Bangun; Jufrizal Jufrizal; Nurdiana Nurdiana
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.205

Abstract

The palm oil industry in Indonesia generates a large amount of solid waste in the form of Empty Fruit Bunches (EFB). This waste is often underutilized and poses environmental challenges. The high lignocellulosic content of EFB offers significant potential for its development as a renewable biomass fuel. This study aims to evaluate the proximate composition and calorific value of EFB to assess its feasibility as a raw material for bio pellets. The experimental procedures included drying, shredding, grinding, and palletization, followed by laboratory testing based on SNI 8021:2014, SNI 7709:2019, and EN ISO 17225 standards. The results showed a moisture content of 7.85% and an ash content of 7.97%, both within acceptable limits, although the ash level was relatively high. Furthermore, EFB contained 24.20% carbohydrates and 37.99% crude fiber, which contributes to the structural stability of the bio pellets. The calorific value obtained was 1200 kcal/kg, which is considerably lower than values reported in previous studies (≥3500 kcal/kg). These findings highlight the potential of EFB as a renewable energy source while underscoring the need for process optimization to meet quality standards, with possible applications in small-scale and household energy generation.
Desain Tangki Klakson pada Mobil untuk Penyimpanan Udara Bertekanan 8 bar Reynaldi Samosir; Jufrizal Jufrizal; Zainal Arif
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.207

Abstract

The air tank is a crucial component in pneumatic car horn systems, serving to store compressed air to produce a loud and responsive sound. Most pressure vessel studies have focused on high-pressure applications in industry. At the same time, research on low-pressure tanks for automotive use remains limited, particularly those referring to ASME Section VIII Division 1 standards. This study designed a horizontal cylindrical air tank using the thin-walled cylinder approach with steel plates (yield strength 250 MPa, safety factor 4). The analysis showed a minimum wall thickness of 1.18 mm, while the actual thickness of 3 mm provides additional safety margins. The circumferential stress of 24.67 MPa and longitudinal stress of 12.34 MPa are well below the allowable stress of 62.5 MPa. These results confirm that the design is safe and efficient, contributing to the development of low-pressure pressure vessels for automotive applications.
Pengaruh Tekanan Uap Boiler Kecil terhadap Kinerja Mekanis Robinson Engine pada Tekanan Maksimum 2,5 bar Hamdani Hamdani; Jufrizal Jufrizal; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.210

Abstract

  This study analyzes the effect of steam pressure variations from a small boiler on the mechanical performance of a Robinson Engine at a maximum pressure of 2.5 bar. A quantitative experimental method was applied with four pressure variations (1.0, 1.5, 2.0, and 2.5 bar). Performance parameters measured included rotational speed, torque, and power, with LPG fuel and water volume maintained as control variables. Results show a significant positive relationship between steam pressure and engine speed; increasing pressure from 1.0 to 2.5 bar raised the speed from 526.2 to 975.6 rpm. These findings highlight the dominant role of steam pressure in engine performance and provide initial quantitative data for developing micro-scale renewable energy-based power plants.
Co-Authors . Zainuddin Abdullah, Ilmi Abdullah, Ilmi Achmad Jusuf Zulfikar Adinda Juwita Nasution Ahmadi, Doni Aldi Kurniawan Andhika Ariyudha Barita Barita Barita, Barita Binti Mohd Zulkifli, Nurin Wahidah Bobby Umroh Darianto Darianto Darianto, Darianto Darwin, Felix David Jomantes Munthe Edwin Harianto Sipahutar Eli Simanjuntak Erna Frida Eswanto Eswanto Eswanto Is Eswanto, Eswanto Eva Riana Br Bangun Farel H. Napitupulu Farel H. Napitupulu Hamdani Hamdani Haniza Hapzi Ali Harahap, Uun Novalia Harry Parulian Limbong Hasanuddin Hasanuddin Hidayah, Muhammad Himsar Ambarita Hotman Ginting Husri Zarmawan Ilmi Abdullah Ilmi Ilmi Ilmi Ilmi, Ilmi Indra Hermawan INDRA HERMAWAN Indra Prasetio Irfandi Irfandi, Irfandi Irvan Hendrawan Surya Dinata Iswandi Iswandi Iswandi Iswandi Jimy Lingga Joel Davidson Hasibuan Joel Hasoloan Simatupang Jos Susilo Kurnia Rizky Nasution Mahyunis Marwan Marwan Mawardi Moraida Hasanah Muhammad Dendy Agusdiandy Muhammad Idris Munajat Munajat Murahmad Parulian Marbun Nurdiana Nurdiana Nurdiana Nurhidayatullah Nurhidayatullah Putra, Bintang Kelana Rahmadsyah Lubis Ramadhan, Fandy Reynaldi Samosir Riana Puspita Rizkha Rida Saktisahdan, Tengku Jukdin Sari Farah Dina Selamat Riadi Siregar, Zufri Hasrudy Siti Masriani Rambe Suherman, Suherman Supriatno, Supriatno Sutrisno, Franky Syahputra, Muhammad Novrin Rizky Syukarni Ali Tarigan, Dicky Adrian Sera Tino Hermanto Uun Novalia Harahap Yoko Nikodemus Manik Yopan Rahmad Aldori zainuddin zainuddin Zainuddin, Zainuddin