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Perum Graha Garuda Mas Blok II No. 39 Dusun V Desa Sigara-Gara Kecamatan Patumbak Kabupaten Deli Serdang Provinsi Sumatera Utara, Indonesia, Kode Pos: 20361.
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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 157 Documents
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Rancang Bangun Multi Pipe Heat Exchanger Pendingin Air Mesin Asap Cair Naufal, Gostsa Khusnun; Ma'mun, Hisyam
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 2 No 3 (2023): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v2i3.81

Abstract

Liquid smoke is a natural pesticide that can be produced quickly and has a low production price. Making liquid smoke is a combustion process carried out with limited air and as little fire as possible, only embers. Then, the smoke from the combustion process with limited air is channeled into a pipe with a cooling system separate from the combustion chamber. This research used a passive cooling system, soaking the heat exchanger pipe with water. The temperature of the smoke produced is kept stable in the range of 80-90 degrees Celsius. The heat exchanger pipe in this research is designed to reduce the heat from the smoke produced by combustion without producing significant air resistance. The most essential requirement is that it can be made with available materials and has low manufacturing difficulty. In selecting a prototype, a heat exchanger system design was produced using a 1.5-inch diameter iron pipe, easily found on the market. The flow of smoke to be cooled through the heat exchanger pipe is from top to bottom, preventing the resulting liquid from being trapped in the curves of the pipe and making it easier for air and smoke that is still hot to remain at the top of the pipe naturally.
Manufaktur dan Pengujian Burner LPG untuk Pemanasan Heater Mesin Stirling mCHPSE-012021 Hidayat, Muhammad Arif; Al Ridho, Fatur Fadhillah; Jufrizal, Jufrizal; Supriatno, Supriatno; Nurdiana, Nurdiana
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 2 No 3 (2023): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v2i3.82

Abstract

This research focuses on developing a special LPG burner for the mCHPSE-012021 Stirling engine. The burner design was developed using CAD software and fabricated using machine tools and a welding process. Tests are carried out to verify how much the burner performance meets the desired specifications. The test results show that although the burner can reach the required high temperature, the thermal efficiency is still low, at 19.72%. This figure is far below the efficiency standard for household gas stoves, according to SNI 8660:2018. These findings highlight the urgency of improving burner design and efficiency to meet established standards, improving the mCHPSE-012021 Stirling engine's overall performance, and significantly increasing energy efficiency. These improvements are necessary to ensure optimal performance and efficiency in energy use in mCHPSE systems, underscoring the importance of developing more efficient and standards-compliant burner technology to support the use of Stirling engines in microenergy applications.
Paralelisme Konsumsi Bahan Bakar Pertalite Dengan Bahan Bakar Gas LPG 3 Kg Pada Mesin Bensin Pompa Air Starke Gwp50 Akhmadi, Amin Nur; Usman, Mukhamad Khumaidi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 2 No 3 (2023): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v2i3.83

Abstract

A fuel is a compound that contains hydrocarbon elements. Pertalite is a fuel quality that has an Octane Research Number 90. LPG is made from petroleum gas material formed from Propane and Butane. The water pump drive engine is a pertalite-fueled internal combustion motor but may replace with LPG. The main reason is the cheap purchase price. Using LPG gas as a substitute for pertalite fuel is interesting research that will be conducted to conduct experiments testing pertalite fuel consumption with LPG gas. The results obtained in this study, namely using rice field water pumps with LPG gas fuel, resulted in lower consumption than pertalite fuel by 32% when without load and 28% when with the load.
Analisa Unjuk Kerja Blower Sentrifugal Pada Mesin Turbo Chopper Jerami Padi Sebagai Pakan Ternak Alternatif Darianto, Darianto; Kurniawan, Fadly Ahmad; Zulfikar, Zulfikar; Iswandi, Iswandi; Hutasoit, Nicolas Sabar
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 2 No 3 (2023): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v2i3.84

Abstract

This study aims to analyze the performance of a centrifugal blower in a Turbo Chopper for Rice Straw as Ruminant Livestock Feed. Conducted over six months at a machine production workshop in Medan Perjuangan, the research employed a qualitative method. The focus was on the blower's impeller, a critical component for increasing air pressure. Tests were performed on impellers with varying numbers of blades (4, 6, and 8) at a constant speed of 1400 rpm. The results showed that the impeller with 4 blades produced the highest wind speed of 4.8 m/s and the greatest efficiency of 0.029%. The study also included an analysis of the blower's torque, flow capacity, and efficiency. These findings are significant for industrial applications, particularly in the process of chopping rice straw, where the centrifugal blower can enhance operational efficiency and effectiveness. This study provides insights into the use of centrifugal blowers to improve the performance of agricultural equipment and potential applications in other industries.
Studi Kelayakan Teknis Potensi Energi Terbarukan Mini Hydro Di Desa Goal Kecamatan Sahu Timur Kabupaten Halmahera Barat Nurharyanto, Riyan Tri; Gunawan, Iwan
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 2 No 3 (2023): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v2i3.85

Abstract

The government has committed to achieving carbon neutrality by 2060 or earlier, with one of the steps to reduce emissions being the endorsement of PT Perusahaan Listrik Negara's General Plan for Electricity Supply (RUPTL) 2021-2030. The RUPTL stipulates that more than half, 51.6% or equivalent to 20.9 Giga Watt (GW), will come from renewable energy sources rather than fossil fuels. The potential of renewable energy, such as mini hydro power plants, is the focus of this effort. Indonesia has great potential in New Renewable Energy (NRE), including 450 MW of mini/micro hydro, with North Maluku alone having a possibility of 145.1 MW. One of the strategic issues at the national level is energy security, particularly in the North Maluku River Basin. The North Halmahera River Basin, which covers West Halmahera Regency, North Halmahera Regency, and Morotai Island Regency, is the primary focus in exploring the potential of micro hydropower plants. To fully utilise the potential of renewable energy and address the strategic issue of energy security, research needs to be conducted on the planning of MHP in Goal Village, with a case study on Akelamo River. The results of the research and analysis show that the water discharge reaches 7.86 m3/det with a head of 16 metres. The potential power that can be generated using Kaplan turbines is 817.21 kW. These steps can serve as a foundation for implementing sustainable MHP development projects. They can contribute significantly to the achievement of net zero emission targets that the government has promised.
Analisis Postur Kerja pada Operator Sortasi di Pabrik Kelapa Sawit dengan Metode RULA dan REBA di PT. London Sumatra, Tbk Begerpang Palm Oil Mill Tarigan, Harri Pratama; Hasibuan, Yetti Meuthia; Utama, Denny Wallady
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.v3i1.89

Abstract

This research aims to identify the body parts of palm oil sorting workers that most often experience problems, as well as determining the need for work improvements in the sorting process. Apart from that, this research also aims to design a tool that can correct the operator's working posture, thereby reducing the risk of musculoskeletal disorders. The research results showed that based on the Nordic Body Map questionnaire, the highest complaints of pain were reported in the waist with a percentage of 100%, while 66.6% of respondents reported pain in the back and left wrist. Analysis using the RULA method revealed that the three respondents obtained a final score of 7, which indicates a high level of risk and requires immediate action. Meanwhile, analysis using the REBA method shows that two workers have a final score of 8 (high risk) and one worker has a final score of 10 (very high risk), all of which require immediate action. After the proposed work posture improvements, the final REBA score decreased from 10 to 7, indicating a decrease in the risk level from high to moderate. However, the final score of RULA remained 7, indicating that improving the proposed posture did not change the final results of RULA. This conclusion emphasizes the importance of immediate treatment of unergonomic work postures to reduce musculoskeletal risks in palm oil sorting workers.
Penerapan Metode CPM (Critical Path Method) Pada Proyek Peningkatan Sarana Dan Prasarana TPS Limbah dan Fasilitasnya Di PT. Putra Kuala Tanjung Syahputra, Rahmad; Pasaribu, Muhammad Fazri; Syarif , Abdul Azis
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.v3i1.90

Abstract

In construction projects, inaccuracies in planning procedures often lead to failures or delays. Given the importance of timely project completion in the competitive construction service industry, the Critical Path Method (CPM) is recommended for scheduling. This method allows for highly detailed time planning by breaking down the work into small items, enabling accurate duration calculations for each activity. This study focuses on rescheduling the construction of the Preprocessing Building (steel structure) at PT. Putra Kuala Tanjung's project. By breaking down the work and performing forward and backward calculations, the author successfully determined the duration of each activity and identified critical tasks. As a result, the project duration was reduced from 252 working days to 156 days, demonstrating a time savings of 96 days.
Optimalisasi Performance Operator Service Sepeda Motor Dengan Menggunakan Metode Work Sampling Pada UMKM Giant Jaya Motor Panggabean, Tri Agus M; Harahap, Uun Novalia; Utama, Denny Walady
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.v3i1.91

Abstract

Motorcycles are a convenient mode of transportation for daily activities. The Giant Jaya Motor motorcycle repair shop, a small and medium-sized enterprise (SME), operates in sales, repair services, maintenance, and spare parts supply. Efficient maintenance and repair services are crucial for smooth operations. The workload at the Giant Jaya Motor workshop is very high, and the operators often need more time to rest, leading to decreased performance and wasted time during services. This study aims to determine the standard time and workload of the operators using the Work Sampling method. This method, similar to a stopwatch time study, is classified as direct work observation because the measurement activities are carried out at the actual workplace being studied. The data processing results show that the standard time required to service one motorcycle is 26.34 minutes, with a working time percentage of 89.41%. It is recommended that the Giant Jaya Motor workshop organize a more efficient work schedule to provide sufficient rest time for operators to reduce fatigue and improve performance. Additionally, improving time management and providing training for operators can reduce time waste and increase overall productivity. Implementing more efficient technology or tools can also speed up maintenance and repair processes without compromising service quality.
Analisis Tegangan dan Arus DC pada Busbar Menuju Plat Anoda dan Katoda dalam Proses Elektrolisis di Unit Chemical Plant PT. Toba Pulp Lestari, Tbk Napitupulu, Natanael; Karti, Karti
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.v3i1.92

Abstract

This electrolysis cell is used to convert sodium hydroxide into sodium chloride. This study aims to measure the voltage and DC passing through the cathode and anode plates during the electrolysis process. The power source used in this process provides a DC voltage of 70 volts, a DC of 8 A, and a resistance of 8.75 Ω. The sodium hydroxide solution can be transformed into sodium chloride at PT with this current and voltage. Toba Pulp Lestari Tbk, Porsea, is in the chemical plant unit, and this electrolysis cell operates optimally. It produces a significant amount of sodium chloride, used as a compound in making paper pulp. The analysis results indicate that the types of anode and cathode plates effectively conduct electricity in the electrolysis cell, aided by busbars as conductors.
Efisiensi Pompa Hidrolik untuk Aktuator Pintu Sterilizer di PT. Torus Ganda Tambusai Timur Dongoran, Firdaus. H.; Silitonga, Nelson
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.v3i1.94

Abstract

PKS PT. Torus Ganda Tambusai Timur, located in Tambusai Village, Tambusai District, Rokan Hulu Regency, is a palm oil factory that produces Crude Palm Oil (CPO) with a production capacity of 60 tons of FFB per hour. The processing processes at this PKS include weighing, boiling, pressing, pulverizing, refining, and extracting the core at PKS PT. East Tambusai Double Torus, the Sterilizer used is a Horizontal Sterilizer, which has an elongated cylinder shape and is positioned horizontally using lorry transportation to transport fresh fruit bunches. The boiling process uses saturated steam with a three-peak boiling system. This research aims to determine the efficiency of the hydraulic pump needed to move the actuator on the Sterilizer door at PT. East Tambusai Double Torus. The object of this research is the Horizontal Sterilizer at PKS PT. East Tambusai Double Torus focuses on determining the efficiency of the hydraulic pump needed to drive the actuator on the Sterilizer door and maintaining the hydraulic pump. The conclusion of this research shows that maintenance is essential in a factory because it helps manage company expenses. After observations and discussions, the efficiency of the hydraulic pump in moving the actuator on the sterilizer door was obtained at 86%.

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