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All Journal Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) JUVOTEK JURNAL: Jurnal Vokasi Teknik
Nurlianna Tarigan
Politeknik Teknologi Kimia Industri Medan
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Bahan Isolasi Termal Terhadap Perpindahan Kalor Pada Tangki Penyimpanan Steam Untuk Meminimalisir Heat Loss dan Tekanan Nurlianna Tarigan
JURNAL VOKASI TEKNIK Vol 1 No 01 (2023): JURNAL VOKASI TEKNIK (JUVOTEK)
Publisher : CV MEDAN TEKNO SOLUSI

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Abstract

Back Pressure Vessel (BPV) merupakan tangki yang berfungsi sebagai tempat penampung steam yang dihasilkan oleh keluaran turbin. Pressure vessel digunakan sebagai penampung fluida, baik cair maupun gas. BPV tidak hanya berperan dalam menampung dan mendistribusikan steam saja, tetapi juga berfungsi sebagai pengontrol steam yang masuk dan keluar. Tekanan pada BPV 3.4 bar dan temperature 138℃. Tangki bertekanan ini merupakan salah satu alat proses suatu industri yang penting, khususnya untuk industri pengolahan minyak sawit. Dalam proses sebelum penyaluran steam, salah satu komponen terpenting adalah media penyimpanan steam, karna fungsi nya untuk menjaga steam yang didapat dari hasil keluaran turbin tidak hilang, agar dapat disalurkan. Maka, diperlukan tangki penyimpanan steam yang dapat menahan kehilangan panas sehingga temperature dan tekanan tidak turun. Maka, digunakan bahan insulasi (isolasi termal) yang memiliki sifat yang buruk dalam menghantarkan panas pada dinding tangki agar dapat menahan panas keluar dari tangki ke lingkungan secara cepat. Bahan isolasi termal glass woll lebih baik dari bahan isolasi termal rockwoll dan gelas woll sebesar 16.244,8158 Kcal/hour dengan perbandingan gelas woll dapat menahan panas lebih baik sebesar 116,5568 kcal/hour.
PERBANDINGAN NILAI EFEKTIVITAS KINERJA MESIN EXPELLER PRESSING PADA PROSES PERGANTIAN SCREW PRESS MAIN SHAFT Nurlianna Tarigan
JURNAL VOKASI TEKNIK Vol 1 No 02 (2023): JURNAL VOKASI TEKNIK (JUVOTEK)
Publisher : CV MEDAN TEKNO SOLUSI

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Abstract

Penelitian ini bertujuan untuk mengetahui perbandingan efektivitas kinerja mesin Expeller Pressing sebelum dan sesudah penggantian Screw Press Main Shaft dan mengetahui besarnya peningkatan persentase (%) minyak Crude Palm Kernel Oil (CPKO) setelah penggantian Screw Press Main Shaft, seiring dengan penggunaan dan masa pakai pada mesin Expeller Pressing keausan dan kerusakan pada komponen mesin kerap terjadi seperti kerusakan pada Screw Press Main Shaft yang menyebabkan efektivitas kinerja mesin menjadi menurun. Turunnya efektivitas kinerja mesin dapat diketahui menggunakan metode Overall Equipment Effectiviness (OEE). Untuk meningkatkan efektivitas kinerja mesin kembali perlu dilakukan perbaikan berupa penggantian Screw Press Main Shaft. Berdasarkan hasil pembahasan efektivitas kinerja mesin Expeller Pressing sebelum dilakukan penggantian Screw Press Main Shaft adalah sebesar 58 % dan setelah dilakukan penggantian efektivitas kinerja mesin sebesar 76%. Rusaknya Screw Press Main Shaft berdampak juga pada minyak CPKO yang dihasilkan, sebelum dilakukan penggantian persentase minyak yang didapat adalah 29,33 % sedangkan setelah penggantian Screw Press Main Shaft persentase minyak yang didapat yaitu 44 % sehingga besarnya persentase peningkatan minyak setelah penggantian Screw Press Main Shaft adalah 14,67 %.
PENGARUH TEMPERATUR UAP TERHADAP EKSPANSI VOLUME DAN TEGANGAN TERMAL RODA LORI DISTASIUN PEREBUSAN PT. X Herry Darmadi; Jery Manaor Simarmata; Sorta Lumbantoruan; Nurlianna Tarigan; Dian Kurnia; Novia Nelza
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 1 (2026): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i1.15083

Abstract

Lorry wheels at the boiling station of a Palm Oil Mill (PKS) are exposed to high-temperature saturated steam during the boiling process, which causes volume expansion and thermal stress in the wheel material. This study aims to analyze the effect of steam temperature on volume expansion and thermal stress on lorry wheels in the palm oil mill sterilization station. Data were obtained through direct observation and theoretical calculations using ASTM A36 steel material parameters. The results show that an increase in steam temperature from 110.27°C to 133.59°C causes volume expansion of up to 1.39 × 10⁻⁵ m³ and thermal stress of up to 241.41 MPa, approaching the material's yield strength (250 MPa). It is concluded that steam temperature significantly affects deformation and potential failure of lorry wheel material.
Analisis Parameter Kinerja Mesin Granulator dalam Proses Produksi Pupuk NPK Nurlianna Tarigan; Karti Karti; Nelson Silitonga; Immanuel Yorlando Simanjuntak
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 1 (2026): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i1.292

Abstract

The process of making NPK fertilizer in granular form is greatly influenced by the performance of the granulator machine used. The granulator plays an important role in producing fertilizer granules with a consistent size, hardness, and homogeneity to meet quality standards and facilitate distribution and field application. This study aims to analyze the performance parameters that affect the efficiency of granule formation in NPK fertilizer and the influence of the granulator on the granule formation process. The research method involved direct observation of the production process and testing the quality of the granules, including particle size distribution, mechanical hardness, and frictional resistance. The results of the study show that, at a granulator rotation speed of 21 rpm and a torque of 28.5 N · m, the NPK fertilizer manufacturing process produces an effective capacity of 24,384 kg/hour. And shows that the more optimal the control of the work parameter settings, the higher the process efficiency and the quality of the NPK fertilizer granules produced.
Pengaruh Bahan Isolasi Termal Terhadap Perpindahan Kalor Pada Tangki Penyimpanan Steam Untuk Meminimalisir Heat Loss dan Tekanan Nurlianna Tarigan
JURNAL VOKASI TEKNIK Vol 1 No 01 (2023): APRIL ISSUE | JUVOTEK JURNAL
Publisher : CV MEDAN TEKNO SOLUSI

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Abstract

Back Pressure Vessel (BPV) is a tank that serves as a reservoir for steam generated by the turbine output. Pressure vessels are used as reservoirs for fluids, both liquid and gas. BPV not only plays a role in storing and distributing steam, but also works as a controller of incoming and outgoing steam. Pressure at BPV 3.5 bar and temperature 138℃. This pressurized tank is one of the important industrial processing tools, especially for the palm oil processing industry. In the process prior to steam delivery, one of the most important components is the steam storage medium, because its function is to keep the steam obtained from the turbine output from being lost, so that it can be distributed. Therefore, a steam storage tank is needed that can withstand heat loss so that the temperature and pressure do not drop. Therefore, an insulating material (thermal insulation) is used which has poor properties in conducting heat to the tank wall in order to hold the heat out of the tank into the environment quickly.Glass woll thermal insulationn material is better than rock woll thermal insulation material with the same thickness of thermalinsulation material of 50 mm, the heat loss for rock wool is 16.361,3726 kcal/hour and glass wool is 16.244,8158  kcal/hour with a comparison of glass wool that can withstand heat. Better at 116,5568 kcal/hour.
Perbandingan Nilai Efektivitas Kinerja Mesin Expeller Pressing Pada Proses Pergantian Screw Press Main Shaft Nurlianna Tarigan
JURNAL VOKASI TEKNIK Vol 1 No 02 (2023): JURNAL VOKASI TEKNIK (JUVOTEK)
Publisher : CV MEDAN TEKNO SOLUSI

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Abstract

This research aims to compare the effectiveness of the Expeller Pressing machine performance before and after replacing the Screw Press Main Shaft and determine the magnitude of the increase in the percentage (%) of Crude Palm Kernel Oil (CPKO) oil after replacing the Screw Press Main Shaft, along with the use and service life of the machine. Expeller Pressing wear and tear and damage to machine components often occur, such as damage to the Screw Press Main Shaft which causes the effectiveness of machine performance to decrease. The decrease in the effectiveness of machine performance can be determined using the Overall Equipment Effectiveness (OEE) method. To increase the effectiveness of machine performance, improvements need to be made in the form of replacing the Screw Press Main Shaft. Based on the results of the discussion, the effectiveness of the Expeller Pressing machine performance before the Screw Press Main Shaft was replaced was 58% and after the replacement the machine performance effectiveness was 76%. Damage to the Screw Press Main Shaft also has an impact on the CPKO oil produced, before the replacement the percentage of oil obtained was 29.33% while after replacing the Screw Press Main Shaft the percentage of oil obtained was 44% so the percentage increase in oil after replacing the Screw Press Main Shaft is 14.67%.
Analisis Volume Udara yang Dibutuhkan Blower dalam Pemindahan Tepung Tapioka dari Unit Dryer ke Unit Shifter Nurlianna Tarigan; Nelson Silitonga; Ivo Jones Sitorus
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.v4i1.178

Abstract

This study aimed to calculate the volume of air required by a blower to transfer tapioca flour from the dryer unit to the shifter unit in a factory with a production capacity of 35 tons per day. The flour transfer process utilizes a blower to generate sufficient airflow. Still, it often experiences instability caused by factors such as blower speed fluctuations, material load variations, and pipe blockages. The research was conducted over one month using data collection methods that included interviews and direct observation. Analysis results showed that the cross-sectional area of the blower pipe was 0.6358 m², the airflow velocity was 1.517 m/s, and the airflow rate reached 0.965 m³/s. The total air volume required by the blower to move the flour was calculated to be 27,792 m³ per day. The findings highlight the importance of properly regulating and maintaining the blower system to ensure efficiency in tapioca flour production.
Analisis Penyebab Penurunan Kecepatan Putaran Mata Pisau Akibat Speed droop pada Proses Pencacahan Ubi di PT. Hutahaean Nurlianna Tarigan; Erick Tampubolon
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.v3i3.149

Abstract

This research was conducted at PT. Hutahaean will analyze the causes of unstable blade rotational speed due to speed droop during the sweet potato chopping process at the cutting station. The cutting machine has eight blades to chop sweet potatoes into smaller pieces before further processing. Observations revealed several key factors causing the instability in blade speed, including electrical voltage fluctuations, wear on the drive motor, improper calibration, and debris buildup around machine components. The calculation results showed that the speed droop in blade rotation reached 5%, contributing to decreased production efficiency. Routine maintenance of machine components and adjustment of settings are recommended to address these issues.
Analisis Penggunaan Bahan Bakar Palm Caul, Bark, dan Palm Sheel pada Sistem Boiler Multi Bahan Bakar di PT. Toba Pulp Lestari, Tbk Porsea Juanda Herlambang Marpaung; Nurlianna Tarigan
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.v2i3.67

Abstract

This research aims to calculate the amount of fuel in the multi-fuel boiler unit at PT Toba Pulp Lestari, Tbk. A boiler is a closed steam boiler, and the heat of combustion is transmitted to the water until it becomes hot steaming water or steam. In the work process, it is necessary to calculate the total fired and moisture to determine the efficient level of maturity for each unit. In this research, the author found that the energy needed to evaporate water in fuel up to 0% was Palm Caul 2303.67 kcal/kg, Palm Shell 3833.25 kcal/kg, and Bark 1513.69 kcal/kg. The energy used in the Multi Fuel Boiler requires Palm Caul 186,688.4 kg/hour, Palm sheel 97,683.6 kg/hour, and Bark 181,508.9 kg/hour.
Optimalisasi Pengecekan dan Perbaikan dengan Penentuan Ukuran Utama Penutup Bawah pada Tangki Timbun di PT. KPBN Belawan Krisanto Silalahi; Nurlianna Tarigan
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.v3i1.99

Abstract

PT. KPBN Belawan is a company branch entrusted as an agent for buying and selling CPO (Crude Palm Oil). PT. KPBN Belawan operates a tank storage unit that temporarily stores CPO before selling it to customers. Regular inspections are necessary for the storage tanks, such as checking the thickness of the tank plates and ensuring the strength of the locking mechanisms on the shell central hole to prevent leaks during filling. This research aims to calculate the dimensions of the bottom cover of the storage tank (central hole), which serves as a seal for the CPO in a storage tank with a capacity of 5,000 liters. The calculated dimensions for the shell central hole are as follows: the nominal diameter of the shell maintenance hole bolts is 17.5 mm, the flange width is 40.25 mm, the outer diameter of the flange shell maintenance hole is 913.6 mm, the bolt circle diameter of the flange shell central hole is 887 mm, the inner diameter of the flange shell central hole is 869.5 mm, the number of bolts is 24, the flange thickness is 18 mm, and the bolt spacing of the flange shell mainhole is 115.77 mm.
Co-Authors Dian Kurnia Erick Tampubolon Herry Darmadi Immanuel Yorlando Simanjuntak Ivo Jones Sitorus Jery Manaor Simarmata Juanda Herlambang Marpaung Karti Karti Krisanto Silalahi Nelson Silitonga Novia Nelza Sorta Lumbantoruan