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IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Published by CV. IRA PUBLISHING
ISSN : -     EISSN : 29624290     DOI : https://doi.org/10.56862/irajtma
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) fokus pada artikel ilmiah hasil penelitian dan review dalam bidang teknik mesin dan aplikasinya yang antara lain meliputi: 1. Konversi energi 2. Mekanika 3. Material 4. Manufaktur 5. Lain-lain yang relevan
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 15 Documents
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Search results for , issue "Vol 3 No 1 (2024): April" : 15 Documents clear
Studi Eksperimental Densitas dan Bilangan Iodin Biodiesel Di Produksi Dari Minyak Goreng Limbah Sitinjak, Sapriadi; Idris, Muhammad
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 1 (2024): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i1.100

Abstract

This research aims to determine the effect of varying reaction times (60, 70, 80, 90, and 100 minutes) at a temperature of 65℃ and a rotation speed of 1050 rpm on the density and iodine number of biodiesel. The raw material used for biodiesel production is waste cooking oil. This study employs esterification and transesterification processes by reacting catalysts with methanol mixed with waste cooking oil. The catalyst concentration variations used in this study are methanol at a ratio of 1:2 and 0.5% NaOH of the total waste cooking oil. The transesterification product is then settled for approximately 10 minutes. The resulting biodiesel and glycerol are separated, after which the biodiesel is washed with distilled water at 50℃ and evaporated at 90-100℃. The density test results for the catalyst concentration of methanol at 1:2 and 0.5% NaOH showed values of 858.5 kg/m³ for reaction times of 60, 70, and 80 minutes, 858.7 kg/m³ for 90 minutes, and 858.4 kg/m³ for 100 minutes. The iodine number test results showed values of 87.2 for 60 minutes, 88.3 for 70 minutes, 90.2 for 80 minutes, 92.3 for 90 minutes, and 82.3 for 100 minutes. The research findings indicate that the obtained density and iodine number meet biodiesel quality standards and are suitable for use according to ESDM regulations.
Studi Eksperimental Titik Nyala dan Viskositas Biodiesel Diproduksi dari Minyak Goreng Bekas Hussein, Muhammad; Idris, Muhammad
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 1 (2024): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i1.101

Abstract

Biodiesel is a potential alternative to replace diesel because its raw materials are renewable and environmentally friendly. One of the raw materials used is waste cooking oil. The high content of free fatty acids in waste cooking oil requires pretreatment in the form of esterification before the transesterification process. This study aims to determine the effect of reaction time variations (60, 70, 80, 90, and 100 minutes) at a temperature of 60°C and a stirring speed of 1050 rpm on biodiesel's flash point and viscosity. The biodiesel production process was carried out in two stages: esterification and transesterification. The catalyst concentration was methanol at a 1:2 ratio and NaOH at 0.5% of the waste cooking oil. After transesterification, the mixture was allowed to settle for 20 minutes. The produced biodiesel was washed with distilled water at 50°C and evaporated at 90-100°C. The flash point test results for the reaction time variations showed the following values: 60 minutes (108.5), 70 minutes (182.5), 80 minutes (182.5), 90 minutes (148.5), and 100 minutes (184.5). The results indicated that the cetane number obtained did not meet the biodiesel quality standards and was not yet suitable for use according to the Ministry of Energy and Mineral Resources (ESDM) regulations.
Studi Eksperimental Angka Setana Diproduksi dari Minyak Goreng Bekas Chairul Fahmi, Muhamamad; Idris, Muhammad
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 1 (2024): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i1.102

Abstract

Biodiesel is a potential alternative to replace diesel due to its renewable and environmentally friendly raw materials. Used cooking oil can be utilized as a feedstock for biodiesel; however, the high free fatty acid content requires pretreatment with esterification before transesterification. This study aims to determine the effect of reaction time variation (60, 70, 80, 90, 100 minutes) on the cetane number of biodiesel produced at 60°C and a speed of 1050 rpm. The esterification and transesterification processes use 0.5% NaOH catalyst and methanol in a 1:2 ratio, mixed with used cooking oil. After transesterification, the mixture is settled for 20 minutes, then the biodiesel is separated and washed with distilled water at 50°C and evaporated at 90-100°C. The cetane number test results are as follows: 60 minutes (44.54), 70 minutes (44.54), 80 minutes (44.54), 90 minutes (44.47), and 100 minutes (44.60). This study shows that the cetane number of the produced biodiesel does not meet the biodiesel quality standards and is not yet suitable for use by the Ministry of Energy and Mineral Resources (ESDM).
Perancangan Mesin Peniris Minyak Bawang Goreng Otomatis Marojahan Hutasoit, Alex; Hermanto, Tino; Fahrul Sinurat, Ryan
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 1 (2024): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i1.103

Abstract

Shallots are one of the horticultural commodities with great potential and should be developed into high-quality products. One of the processed products from shallots is fried shallots, which are used to enhance the flavor of food. Fried shallots are a sought-after culinary product, particularly among homemakers, snack bar owners, and others. The aim of this research is to design an automatic fried shallot oil draining machine for home industry scale. This research method utilizes AutoCAD software for design planning. The results of this design show that the required electric motor power is 0.85 Hp, the motor pulley and drive shaft pulley ratio is 1:2, with the motor pulley being 60 mm and the drive shaft pulley 120 mm, the shaft diameter is 30 mm, and the oil draining drum diameter is 580 mm with a height of 590 mm, using stainless steel material. The design yields a draining machine capable of continuous operation with the planned production capacity.
Analisa Gaya dan Koefisien Gesek Ban Berdasarkan Perbedaan Massa Mobil Terhadap Permukaan Jalan Aspal Pasaribu, Muhamamd Nuh Hudawi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 1 (2024): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i1.105

Abstract

In general, roads consist of asphalt road surfaces and concrete road surfaces which have different surface textures. Of the two roads, asphalt roads are generally longer or more frequently traveled than concrete roads. Asphalt roads have a smooth rough texture. The texture of road surface roughness (IRI) will have an impact on safety and comfort such as the friction coefficient of vehicle tires when passing over rough road surfaces. Safety and comfort are influenced by IRI, mass, speed and type of tire used when in contact with the road surface texture. The aim of this research is to obtain the IRI value using the Naasra Roughness meter ARRB, to obtain the magnitude of the force and coefficient of friction applied on the Abdul Haris Nasution road Medan which has an asphalt road length of 3200 meters with an experimental method using a 2010 Toyota Yaris at a speed of 10 km/hour to 45 km/hour. From the results of experimental research, an IRI value of 6.4 was obtained. The faster the vehicle/car passes, the smaller the force value and friction coefficient value can be at an initial speed of 10 km/hour.

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