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Muh Anhar
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Jurnal Teknik Mesin
Published by Politeknik Negeri Ketapang
ISSN : -     EISSN : 31235425     DOI : https://doi.org/10.58466/
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering
JTM : JURNAL TEKN IK MESIN di https://jurnal.politap.ac.id/index.php/jtm merupakan jurnal blind peer-review yang didedikasikan untuk publikasi hasil penelitian berkualitas di bidang Teknik Mesin dan Inovasi Teknologi . Artikel yang dimuat di Jurnal Jurnal Teknik Mesin meliputi hasil penelitian ilmiah asli (prioritas utama), sedangkan untuk artikel review ilmiah yang baru (bukan prioritas utama) dan juga komentar yang bersifat kritis terhadap hasil karya ilmiah yang diterbitkan jurnal Jurnal Teknik Mesin. Semua publikasi di jurnal Jurnal Teknik Mesin bersifat akses terbuka yang memungkinkan artikel tersedia secara online secara bebas tanpa berlangganan apa pun
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 33 Documents
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ANALISA KINERJA MESIN PRESS SAMPAH PLASTIK BERDASARKAN LAMA WAKTU PRESS Fadzal Taqwa Zafali; Anis Siti Nurrohkayati
JTM : JURNAL TEKNIK MESIN Vol 2 No 1 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/01jgjy37

Abstract

The abstract is to be in fully-justified italicized text, at the top of the paper with single column as it is here, below Plastic waste is a type of inorganic material that is difficult to decompose and can cause environmental pollution if not properly managed. One effective solution is compaction using a pressing machine to reduce waste volume, thereby facilitating transportation, storage, and recycling processes. This study aims to analyze the performance of a plastic waste pressing machine based on variations in pressing time to determine the optimal duration and compaction efficiency. The research method used is a quantitative experimental approach. A sample of 1 kg of used plastic bottles was processed using an automatic vertical pressing machine. The experiment was conducted four times with variations in pressing time ranging from 2.49 to 3.14 minutes. The observed parameters included initial and final height, compaction efficiency, height reduction, and compaction rate (cm/s). The results showed that compaction efficiency ranged from 72.73% to 75.90%, with an average of 74.32%. The pressing time of 2.49 minutes produced the highest efficiency, while the fastest compaction rate of 0.205 cm/s was observed in the first trial. The variation in pressing time was proven to affect both efficiency and machine performance, although not always proportionally. It can be concluded that the optimal pressing time ranges from 2.5 to 3.1 minutes. This study can serve as a basis for developing more efficient pressing machines for plastic waste management.
Perancangan Dan Pembuatan Alat Penekan Piston Rem Sepeda Motor Muh Anhar Anhar; Fickry Ghusti Febryan; Asep Ruchiyat; Hairian Rahmadi; Yudhi Chandra Dwiaji
JTM : JURNAL TEKNIK MESIN Vol 2 No 1 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/g7vj6v87

Abstract

Because many mechanics in general repair shops still press brake pistons using a ring spanner, which often causes the brake pistons to be scratched or broken, the purpose of this study is to assist mechanics in the brake pad installation process to avoid piston damage and to understand how the brake piston presser works.The methods used include literature review, field observation, design using AutoCAD software, and the manufacturing process, which consists of four main stages: material preparation (iron plate, bolts, nuts). After the tool is completed, testing is conducted to ensure its function and efficiency. The average time for the brake piston presser tool is 06.47 seconds, while the average time when using a ring spanner is 07.72 seconds. The test results can be seen from the efficiency of the brake piston presser tool made by the author
Pengaruh Overhaul Terhadap Kinerja High Pressure Heater Unit 3 PLTU Banten Lontar Trassanda Scudetto Widestomo Putra; Eri Prabowo; Fikry Ramadani
JTM : JURNAL TEKNIK MESIN Vol 2 No 1 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/drv17368

Abstract

This study analyzes the effect of overhaul on the performance of High Pressure Heater (HPH) 1,2, and 3 in unit 3 of PLTU Banten 3 Lontar  at a constant load of 294 MW. The analysis used actual operational data before overhaul (July 2018) and after overhaul (December 2018). Heater Performance was evaluated using terminal temperature difference (TTD), drain cooler approach (DCA), temperature rise (TR), logarithmic mean temperature difference (LMTD), Capacity heat ratio (C), and thermal effectiveness. The result show that overhaul generally improved HPH performance. The strongest improvement occured HPH 1, where DCA decreased from 26.68 celcius to 4.38 celcius, LMTD decreased from 42.81 celcius to 20.62 celcius, and effectiveness increased from 0.72 to 0.95. HPH 2 showed the only TTD improvement from 0.79 celcius to 0.66 celcius, while HPH 1 and HPH 3 experienced slightly higher TTD after overhaul. Even so, the consistent decline in effectiveness for all heaters indicate that tube cleaning, leakage testing, tube plugging, and gasket replacement restored heat transfer performance.  Therefore, overhaul is an effective maintenance action to improve HPH thermal performance with the most significant impact observed in HPH 1 
Perancangan Mesin Pencacah Pelepah Kelapa Sawit Bangun Titis Afiludin; Muh Anhar; Hairian Rahmadi; Dewi Nurmayasari
JTM : JURNAL TEKNIK MESIN Vol 2 No 1 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/t1x19z04

Abstract

Mesin pencacah pelepah kelapa sawit adalah mesin yang digunakan untuk mempermudah saat pengolahan. Prinsip kerja mesin ini merupakan metode gaya gesek, dimana motor listrik meneruskan putaran pada poros, pulley, v-belt dan bearing. Pada poros didalam cover  berisi mata pisau,. hasil spesifikasi alat yang telah dirancang menggunakan AutoCAD 2007 adalah sebagai berikut: Dimensi rangka 900 mm × 820 mm × 500 mm, diameter cover atas Ø430 mm × 360 mm, dimensi cover bawah 730 mm × 360 mm × 390 mm × 45°, panjang mata pisau 250 mm × 100 mm × 8 mm. Menggunakan motor bensin 5 HP, menggunakan sistem transmisi tunggal dengan 2 buah pulley 1:2, 2 buah v-belt berdampingan, satu buah poros dan dua buah bearing duduk
Studikasus Sistem Perawatan Genset Perkins 45 Kva Di PT. Agro Lestari Mandiri Ntye, Nanga Tayap Haykal Aristio; Muh Anhar; Yusuf
JTM : JURNAL TEKNIK MESIN Vol 2 No 1 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/dy08w793

Abstract

Penelitian ini menganalisis studi kasus sistem perawatan genset perkins 45 kVa di PT. Agrolestari mandiri NTYE, Nanga Tayap, yang berfungsi sebagai sumber listrik utama untuk operasional perusahaan. Mengingat pentingnya peran genset, penelitian ini bertujuan untuk mengidentifikasi permasalahan umum dan mengevaluasi efektivitas program perawatan yang diterapkan.Metode penelitian kualitatif deskriptif digunakan dengan pendekatan observasi, wawancara, dan analisis data operasional. Hasil penelitian menunjukkan bahwa perawatan genset masih menghadapi beberapa kendala, termasuk masalah low power, overheat, kebocoran seal, dan keterlambatan penambahan coolant. Untuk mengatasi hal tersebut, perusahaan menerapkan perawatan preventif harian, mingguan, bulanan, dan tahunan yang berfokus pada pengecekan dan penggantian komponen esensial, serta penanganan kerusakan secara berjenjang.Hasil penelitian menunjukkan bahwa Genset Perkins 45 kVA di PT. Agrolestari Mandiri NTYE mengalami beberapa permasalahan utama, seperti low power, overheat, kebocoran seal, kerusakan pipa injeksi, dan ketidakstabilan RPM. Faktor penyebabnya meliputi radiator yang kotor, gangguan pada relay, serta keterlambatan penambahan coolant yang menurunkan efisiensi sistem pendinginan. Frekuensi service rutin yang rendah (dua kali dalam 1,5 tahun) menunjukkan pola pemeliharaan preventif yang belum optimal, sehingga meningkatkan frekuensi perbaikan korektif dan penggantian komponen penting seperti water house, air cleaner, radiator, fuel filter, dan v-belt. Kondisi tersebut mengindikasikan adanya keausan dini akibat kurangnya pencegahan dan pemantauan kondisi komponen. Oleh karena itu, penerapan sistem preventive maintenance yang lebih disiplin dan terjadwal diperlukan untuk menjaga performa serta memperpanjang umur pakai genset
Evaluasi Kinerja BFPT Unit 6 PLTU Suralaya Pasca-Overhaul Eri Prabowo; Trassanda Scudetto Widestomo Putra; Alamsyah Robby Maulana
JTM : JURNAL TEKNIK MESIN Vol 2 No 2 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/1zt8wd31

Abstract

Boiler Feed Pump Turbine (BFPT) is a critical auxiliary component in steam power plants because it supplies feedwater from the deaerator to the boiler steam drum through the heater system. Continuous operation may reduce pump performance due to leakage, wear, seal damage, abnormal noise, and internal component deterioration. This study evaluates the performance of BFPT Unit 6 at PLTU Suralaya before and after overhaul using performance test data from December 2019 and February 2020. The evaluated parameters include flow rate, suction and discharge velocity, total head, hydraulic power, and pump efficiency. The calculation uses the continuity equation, Reynolds number, head losses, total head, hydraulic power, and pump efficiency. The results show that overhaul increased the efficiency of both BFPT units. BFPT A efficiency increased from 68.98% and 70.00% before overhaul to 72.01% and 73.50% after overhaul. BFPT B efficiency increased from 69.31% and 71.10% to 72.05% and 74.20%. The increase was associated with lower total head and restored mechanical condition after mechanical seal replacement and inner-part repair. Therefore, overhaul improved BFPT performance and should be supported by routine monitoring of leakage, vibration, lubrication, and operating flow.  
Analisis Co-Firing Kulit Kayu terhadap Emisi dan SFC PLTU Balikpapan Eri Prabowo; Trassanda Scudetto Widestomo Putra; Wenny Retno Astagina
JTM : JURNAL TEKNIK MESIN Vol 2 No 2 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/pgfhcn81

Abstract

Co-firing is a practical approach to reduce coal dependency and improve environmental performance in existing coal-fired power plants. This paper evaluates 3% wood bark co-firing at Unit 2 of PLTU Teluk Balikpapan 2 x 110 MW, focusing on emissions, specific fuel consumption (SFC), and key operating parameters. The study compares baseline operation using 100% coal with operation using 97% coal and 3% wood bark. Fuel characteristics, boiler operating data, bottom ash observation, stack visual inspection, SFC calculation, and flue gas emission measurements are evaluated. Wood bark has lower sulfur content than coal, namely 0.13% compared with 0.59%, although its gross calorific value is lower. The co-firing test decreased SO2 emission from 246.7 mg/Nm3 to 190 mg/Nm3, equivalent to a reduction of 22.98%, while NOx increased from 285 mg/Nm3 to 307 mg/Nm3 but remained below the 550 mg/Nm3 emission limit. SFC changed slightly from 0.706 kg/kWh to 0.707 kg/kWh. Bed temperature decreased from 927.16 degC to 924.18 degC and FEGT decreased from 1013.78 degC to 1011.24 degC, indicating stable boiler operation. The test did not show black smoke, carry over, or significant agglomeration tendency. Therefore, 3% wood bark co-firing is technically feasible for emission reduction with limited impact on SFC.
Analisis Desain Turbin Angin Horizontal 100 W di Pantai Koneng Eri Prabowo; Trassanda Scudetto Widestomo Putra; Michael Putra Humisar Tampubolon
JTM : JURNAL TEKNIK MESIN Vol 2 No 2 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/86etnm35

Abstract

turbine at Pantai Koneng, Dumai, using NACA airfoils and QBlade simulation. The design compares three-blade and five-blade rotor configurations based on measured wind data, blade geometry, coefficient of power, tip speed ratio, rotational speed, and simulated power output. Primary wind data were obtained using a digital anemometer on 15-16 July 2023, while secondary data were taken from BMKG Pekanbaru and windPROSPECTING. The measured average wind speed at Pantai Koneng was 4.00 m/s, with a maximum hourly average of 6.00 m/s and a minimum of 3.00 m/s. The blade radius was set at 2 m with a taperless chord of 0.145 m and twelve blade segments using NACA 4424, NACA 4418, and NACA 4412 airfoils. QBlade results show that the three-blade configuration produces 230.793 W, coefficient of power 0.468, TSR 7, and rotational speed 200 rpm. The five-blade configuration produces 188.354 W, coefficient of power 0.382, TSR 5, and rotational speed 150 rpm. The three-blade rotor is therefore recommended because it provides higher simulated output and better suitability for the intended 100 W design target
Evaluasi Overhaul terhadap Konsumsi HSD PLTDG Pesanggaran Eri Prabowoa; Trassanda Scudetto Widestomo Putra; Indra Kusumah Disastra
JTM : JURNAL TEKNIK MESIN Vol 2 No 2 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/pansbs77

Abstract

High Speed Diesel (HSD) consumption is a critical operating variable for diesel-gas power plants because it directly affects fuel cost, engine performance, and generating-unit reliability. This article evaluates HSD fuel consumption of the Wartsila 18V50DF engine at PLTDG 200 MW Pesanggaran, Bali, before and after overhaul. The study uses quantitative analysis of performance-test data from Unit 02 and Unit 05 at several operating-hour intervals. Calculations include effective power, indicated power, charge efficiency, combustion-air requirement, air-fuel ratio, hourly fuel consumption, and brake specific fuel consumption. The results show that overhaul reduced HSD consumption in all observed comparisons. Unit 02 decreased from 4888.91 to 2653.98 L/h at 18000 h, from 6425.42 to 4330.17 L/h at 36000 h, and from 5168.27 to 5098.43 L/h at 48000 h. Unit 05 decreased from 4330.19 to 4260.32 L/h at 36000 h and from 5517.48 to 5168.27 L/h at 48000 h. The improvement is associated with restoration of combustion components, cleaner air supply, and reduced combustion deposits after overhaul.
Evaluasi Major Overhaul terhadap Efisiensi dan SFC PLTD Kotaraya Eri Prabowoa; Trassanda Scudetto Widestomo Putra; Afristian Arief Dwiranda
JTM : JURNAL TEKNIK MESIN Vol 2 No 2 (2026)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/ybb4c426

Abstract

Diesel power plants remain important for isolated electricity systems because they can be operated flexibly and maintained locally. This paper evaluates the effect of major overhaul on thermal efficiency and Specific Fuel Consumption (SFC) of a 1 MW Cummins KTA50 G8 diesel engine at PLTD Kotaraya. The study used operational logsheet data, commissioning test data, before-overhaul data, and after-overhaul data. SFC was calculated from fuel mass flow and engine power, while thermal efficiency was calculated from engine power, fuel mass flow, lower heating value, and combustion efficiency. The analyzed load levels were 50%, 75%, 85%, and 100% for before and after major overhaul. The results show that SFC after overhaul was lower than before overhaul at all comparable load levels: at 50% load from 267.143 to 238.000 gr/kWh, at 75% load from 245.192 to 238.000 gr/kWh, at 85% load from 255.000 to 230.000 gr/kWh, and at 100% load from 242.857 to 229.500 gr/kWh. Thermal efficiency also increased from 33.489% to 37.590%, 36.488% to 37.590%, 35.084% to 38.898%, and 36.838% to 38.982%, respectively. The findings indicate that major overhaul improved fuel economy and thermal performance, especially when the unit operated at higher load

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