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All Journal Rotasi Semesta Teknika Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) International Journal of Engineering Continuity Jurnal Pengabdian Masyarakat Bangsa Journal of Mechanical Engineering and Applied Technology
Mohammad Samsul Bakhri
Politeknik Purbaya, Kabupaten Tegal, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences

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Kaji Terap Tanaman Akumulator Limbah Timbal (Pb) di Desa Mangunsaren, Kabupaten Tegal Maulana Teguh Perdana; Titiek Deasy; Budi Santoso; Mohammad Samsul Bakhri; Muhammad Nursyams Hilmi; Yuli Nurasri; Yohannes S.M. Simamora; Kawi Boedisetio
Jurnal Pengabdian Masyarakat Bangsa Vol. 1 No. 4 (2023): Juni
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v1i4.71

Abstract

Sejumlah industri kecil menengah (IKM) di Desa Mangunsaren, Kecamatan Tarub, Kabupaen Tegal, bergerak dalam bidang penyepuhan logam. Berdasarkan pengamatan, pengolahan limbah industri tersebut belum dikelola dengan baik. Hal ini dikhawatirkan akan berpotensi mencemari lingkungan di sekitarnya dengan logam berat seperti timbal (Pb). Sinyalemen ini diperkuat dengan hasil pengujian terhadap beberapa titik terutama di sekitar IKM penyepuhan logam. Tampak bahwa kandungan Pb pada kisaran 11,58 hingga 462,07 ppm. Di sisi lain, pada literatur diperlihatkan bahwa gelagah (saccharum spontaneum) merupakan tanaman akumulator Pb. Berdasarkan  pengetahuan ini, dilakukan inisiasi penanaman gelagah pada titik-titik yang tercemari Pb di Desa Mangunsaren.  Kegiatan kaji terap ini mendapat dukungan dari IKM, Pemerintah Kabupaten Tegal, Karang Taruna Desa Mangunsaren, Penyuluh Pertanian Kecamatan Tarub, Karang Taruna Kabupaten Tegal, Pemerintah Desa Mangunsaren, dan Dinas Lingungan Hidup Kabupaten Tegal. Dukungan ini berupa penyediaan lahan penanaman, penyediaan bibit, hingga partisipasi dalam kegiatan penananaman. Hasil pokok kegiatan ini adalah ketersediaan titik-titik uji yang dapat diamati tiga bulan berikutnya untuk mengukur selisih tingkat pencemaran Pb sebelum dan sesudah penanaman gelagah.
Rancang Bangun Mesin Pengepres Sandal Mengunakan Roll Kapasitas 60 Buah/Menit dengan Daya Motor 1 HP Trio Setiyawan; Hening Krisna Adi; Satrio Erdiano; Syahru Romadlon Fanani; Mohammad Samsul Bakhri
Journal of Mechanical Engineering and Applied Technology Vol 1, No 1 (2023): Volume 1 Issue 1 Year 2023 (March 2023)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v1i1.4723

Abstract

Abstract  Sandals are a need for clothing for humans which are often used in daily activities, sandals are also protective feet for humans when on the move. Sandals have several types, in this study the authors focused on sandals made of EVA sponge. In the process of making sandals, several machines or tools are needed to make sandals, while this research will focus on the sandal adhesive machine. The purpose of this research is to get perfect gluing results in making sandals using a roll machine which is easy to operate and maintain. The method used is gluing the sandal material through a rolling process which is carried out by placing the sandal material on the guide table, then the sandal material is entered between a pair of pulling rolls and then forwarded to the next pair of rolls for the gluing or pressing process. The end result of the design of this sandal pressing machine can produce sandals production capacity of up to 60 sandals/minute with a shear stress strength of 0.1505 N/mm².
Uji Performance Alat Uji Pengereman Kereta Cepat Untuk Kecepatan 160 km/jam Bakhri, Mohammad Samsul; Rusnaldy, Rusnaldy; Paryanto, Paryanto
ROTASI Vol 26, No 3 (2024): VOLUME 26, NOMOR 3, JULI 2024
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.26.3.16-22

Abstract

Indonesia is currently developing an international standard high-speed train industry. One of the important components of the fast train is the braking system. The fast train braking test rig at Diponegoro University has a speed of 160 km/h using a pneumatic braking system accompanied by disk brake and brake pad components for high speed. The performance test of the fast train braking test equipment needs to be done to find out if the test rig is in accordance with PT INKA standards and ensure it is safe to test. The purpose of this research is to test the performance of the braking test equipment, including the deceleration, braking distance, and mechanical vibration criteria. Measurement of deceleration and braking distance is carried out using a tachometer sensor and stopwatch, while mechanical vibration is measured using a vibration meter. The test results of deceleration and braking distance obtained were then compared with PT INKA standards, and the results of vibration signals obtained were then compared with ISO 10816 vibration level standards. The results showed that in normal braking conditions with a pressure of 3.8 bar, the average value of deceleration was 1.44 m/s2 , and the braking distance was 684 m. In emergency braking conditions with a pressure of 5 bar, the average value of deceleration was 2.70 m/s2 , and the braking distance was 365 m. The resulting mechanical vibration shows on bearing 1 the average Vrms value on the horizontal accelerometer of 0.03 in/s, the vertical accelerometer of 0.01 in/s, and the axial accelerometer of 0.01 in/s, and on bearing 2 the average Vrms value on the horizontal accelerometer of 0.02 in/s, the vertical accelerometer of 0.01 in/s, and the axial accelerometer of 0.01 in/s. From these vibration results, it can be concluded that the vibration conditions in accordance with ISO 10816 are safe to operate.
Study the Applicability of a Shelf-Type Fish Drying Machine with a Heat Source from Coconut Shell Biomass Budi, Agus Sulistiyo; Bakhri, Mohammad Samsul; Nurasri, Yuli; Suripto, Aghna Ilma Nurdin; Amir, Sultan Krisna; Rojikin, Rojikin
Semesta Teknika Vol 26, No 2 (2023): NOVEMBER
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v26i2.17077

Abstract

The sun’s heat is usually utilized to dry traditional processed salted fish. However, its quality suffers as a result of the lengthy drying process. This issue can only be resolved with the help of efficient drying equipment. Advantages of artificial drying include selecting the drying capacity according to requirements, without requiring a considerable space, and managing the drying conditions. This research aims to discover an effective way to utilize biomass waste from coconut shells to speed up the drying process for salted fish. The study method involved several steps: acquiring data, analyzing the tools and machine, observing the machine, and designing a new machine. The three airspeed parameters tested in this study were 7 m/s, 10 m/s, and 12 m/s. The drying shelf reached a maximum temperature of 81.4 °C at 7 m/s, 100.3 °C at 10 m/s, and 99.4 °C at 12 m/s.
Influence of TiO₂ Nanofluid Concentration on Friction Factor and Reynolds Number in Laminar–Turbulent Flow through 4 mm and 6 mm Acrylic Pipes Ali Nashirudin, Hamzah; Samsul Bakhri, Mohammad; Haryadi, Deni; Poernomo Sari, Sri
International Journal of Engineering Continuity Vol. 4 No. 1 (2025): ijec
Publisher : Sultan Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58291/ijec.v4i1.404

Abstract

This study examines the hydraulic and thermal performance of TiO₂–water nanofluids in small-diameter acrylic pipes, focusing on the influence of nanoparticle concentration and pipe geometry. Experiments were conducted using internal diameters of 4 mm and 6 mm, with TiO₂ volume concentrations of 0.3% and 0.5%. Nanofluids were prepared via a two-step method combining magnetic stirring and ultrasonic sonication to ensure uniform dispersion. Flow parameters, including Reynolds number, friction factor, and Nusselt number, were determined from measured pressure drop and flow rate data. Results show that increasing TiO₂ concentration elevates friction factor, with the effect more pronounced in smaller pipes due to intensified wall shear and higher surface-area-to-volume ratios. The 0.3% nanofluid consistently achieved higher Reynolds numbers and competitive heat transfer performance, while 0.5% concentration often reduced Nusselt number at equivalent flow conditions, likely due to viscosity-induced flow resistance and particle agglomeration. Deviations from classical laminar and turbulent correlations were observed, particularly in the transitional regime, indicating altered boundary layer behaviour. These findings highlight the need for optimised nanoparticle loading and diameter selection to balance heat transfer enhancement against hydraulic penalties in compact thermal management systems.
Design and Calculation of Braking System for High-Speed Train Operating at 160 km/h Mohammad Samsul Bakhri; Muhammad Nuzan; Hamzah Ali Nashirudin
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 3 No. 2 (2024): Oktober : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v3i2.7088

Abstract

The transport industry stands out as a crucial domain in bolstering Indonesia's journey toward economic revitalization, swift progress, and equitable distribution. At present, Indonesia is in the process of establishing a high-speed railway sector that adheres to global benchmarks. Rail-based transit systems exert considerable influence on the mobility of both individuals and commodities. Trains possess the capacity to convey substantial volumes of commuters and freight in one journey, thereby playing a role in diminishing operational expenses for transportation fleets. Braking is an important aspect of driving because it affects safety, vehicle control, and vehicle efficiency. In order to develop braking research, high-speed train braking test equipment is needed to describe the actual conditions during braking. High-speed trains are a type of train capable of traveling at speeds above 200 km/h. The braking applied to these high-speed trains involves several combined forces, including regenerative braking and pneumatic braking. In regenerative braking, deceleration occurs due to the conversion of kinetic energy into electrical power. This mechanism is carried out when the train is at an operational speed of 220 km/h until it decelerates to 160 km/h. Next, pneumatic braking was applied at a speed of 160 km/h until the train slowed down and came to a stop. This study shows how the calculation process was carried out using a scale of 1:4 at a speed of 160 km/h.
PERFORMANCE TESTING OF SEAWATER DISTILLATION EQUIPMENT USING SOLAR POWER TO PRODUCE FRESH WATER Sepdianto; Kosasih, Khaecal Rabbil Izzati; Bakhri, Mohammad Samsul
Journal of Mechanical Engineering and Applied Technology Vol. 3 No. 3 (2025): VOLUME 3 ISSUE 3 YEAR 2025 (NOVEMBER 2025)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v3i3.7195

Abstract

Design is a stage that involves several systematic stages, ranging from basic calculations to the performance test process. In the process of making distillation equipment, after the fabrication process, a process of testing the performance of the tool is required. Where is the performance test process to find out if the tool is in accordance with the calculations made in the previous process. This study aims to determine the quality of water resulting from distillation which includes, TDS, odor, pH, and salinity. The test method used in this study is experimental by conducting a performance test of a distillation device that utilizes sunlight for 5 days with 5 liters of water tested (1 liter per day continuously) starting from 08.00 to 17.00 by making observations every 1 hour. The results of the equipment test show that the quality of the water produced from the distillation equipment has met the standards of the Indonesian Ministry of Health. No.2 of 2023, while for the highest freshwater productivity per day of 287 ml and the lowest 204 and for the highest distillation equipment performance with an efficiency value of 94.18% and the lowest efficiency of 86.75%. Keywords: Distillation; Solar Power; Sea Water; Quality
Co-Authors Ali Nashirudin, Hamzah Amir, Sultan Krisna Budi Santoso Budi, Agus Sulistiyo Hamzah Ali Nashirudin Haryadi, Deni Hening Krisna Adi Kawi Boedisetio Kosasih, Khaecal Rabbil Izzati Maulana Teguh Perdana Muhammad Nursyams Hilmi Muhammad Nuzan Paryanto Paryanto Poernomo Sari, Sri Rojikin, Rojikin Rusnaldy Rusnaldy Satrio Erdiano Sepdianto Suripto, Aghna Ilma Nurdin Syahru Romadlon Fanani Titiek Deasy Trio Setiyawan Yohannes S.M. Simamora Yuli Nurasri