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All Journal International Journal of Advances in Applied Sciences Jurnal Teknologi Journal of Energy, Mechanical, Material and Manufacturing Engineering Dinamisia: Jurnal Pengabdian Kepada Masyarakat SENTIA 2016 JOURNAL OF SCIENCE AND APPLIED ENGINEERING INTEK: Jurnal Penelitian Journal of Engineering and Scientific Research (JESR) Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Jurnal Pengabdian Polinema Kepada Masyarakat Jurnal Pengabdian dan Pemberdayaan Nusantara (JPPNu) Automotive Experiences Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian Kepada Masyarakat (JPKM) Jurnal Teknologi Jurnal Ilmiah Fakultas Sains dan Teknik Universitas Nusa Cendana Asian Journal Science and Engineering JPNM : Jurnal Pustaka Nusantara Multidisiplin Jurnal Teknik Mesin Jurnal Polimesin Journal of Community Engagement Energy: Jurnal Ilmiah Ilmu-ilmu Teknik JK3UHO
Satworo Adiwidodo
Politeknik Negeri Malang
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OPTIMASI JUMLAH PIT PADA QUICK SERVICE MOBIL DI BENGKEL MOBIL PT. X Ari Purnomo Aji; Hari Rarindo; Satworo Adiwidodo; Fatkhur Rohman
Jurnal Teknologi Vol 14 No 2 (2020): Nopember
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (183.988 KB)

Abstract

Dengan perkembangan dan bertambahnya pelanggan dari produk X, maka kebutuhan service juga akan bertambah. Jika jumlah pit yang ada tidak sesuai dengan jumlah pelanggan yang datang maka akan terjadi antrian service. Hal ini bisa merugikan pelanggan karena harus menunggu dalam antrian dan kehilangan banyak waktu uuntuk melakukan kegiatan lain. Sebaliknya jika terdapat PIT yang menganggur maka akan mengakibatkan kerugian bagi perusahaan karena menimbulkan biaya oprasional yang lebih bagi perusahaan. Tujuan dari penelitian ini untuk mengetahui PIT service yang sesuai dengan jumlah dan kebutuhan pelanggan yang datang. Antrian terjadi saat ada pihak yang harus menunggu untuk mendapatkan pelayanan, antrian dalam skala kecil maupun besar membutuhkan penyelesaian serta solusi yang tepat dan optimal. Dengan dilakukan penelitian ini maka akan mengetahui jumlah PIT yang optimal dan sesuai dengan jumlah pelanggan. Metode yang digunakan adalah kuantitatif dengan pendekatan deskriptif., yaitu melakukan variasi jumlah PIT dengan dasar keadaan saat ini. Teknik pengambilan data yang digunakan adalah observasi dengan melakukan pengamatan dan pengambilan data langsung jumlah pelanggan. Selanjutnya adalah melakukan wawancara pihak bengkel untuk mendapatkan informasi sebagai acuan dalam melakukan peneletian. Hasil analisis yang didapat adalah sebagai berikut: Model antrian yang digunakan untuk servis cepat pada PIT di bengkel X adalah (M/M/2):(FIFO/∞/∞). Jumlah PIT servis pada servis cepat dengan 2 PIT servis saat ini sudah optimal. Dari analisis menggunakan model keputusan tingkat aspirasi, diperoleh jumlah optimum yaitu sebanyak 2 PIT dengan nilai
RISK MANAGEMENT ASSESSMENT K3 UPAYA PROTEKSI PANDEMI COVID-19 TEMPAT USAHA HOME INDUSTRI MASAKAN AYAM DENGAN METODE HIRARC Hari Rarindo; Etik Puspitasari; Satworo Adiwidodo; Hangga Wicaksono; Hilmi Iman Firmamansyah; Wirawan Wirawan
Jurnal Teknologi Vol 16 No 1 (2022): Mei 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (159.129 KB)

Abstract

HIRARC disebut dengan Hazard Identification Risk Assessment and Risk Control adalah metode penelitian yang rerevan untuk menemukan (Invensi) sumber risiko bahaya tidak hanya bengkel akan tetapi juga akan terjadi di tempat kerumunan bahkan tempat warung-warung makanan yang saat ini kondisi pandemi Covid-19 belum merada. Hal dimungkinkan terjadinya penyakit akibat kerja di tempat kerja produksi pemasakan pada warung-warung yang sering dikerumuni oleh para pembeli atau konsumen, untuk itu diperlukan upaya pencegahan dan pengendalian melalui cara HIRARC. Untuk mendapatkan penilaian dan menajemen risiko yang terjadi di tempat kerumunan tersebut. Langkah awal untuk menemukan adalah melakukan identifikasi bahaya risiko kerja yang merupakan tahap awal yang harus diperhatikan tempat kerja berkaitan dengan kondisi pandemi Covid-19 yang menyerang saluran pernafasan dan berdampak terhadap keselamatan dan kesehatan kerja bagi masyarakat akibat dari berkembangnya kondisi pandemi Covid-19 saat ini yang semakin mengawatirkan bahkan penyebarannya berkembang pada lingkungan di segala area social distancing sering dilanggar.
Simulation of Effect of Airfoil MH32 with Variation Taper Ratio and Angle of Attack Coefficient Lift and Drag Fixed wing Unmanned Aircraft Satworo Adiwidodo; Andy Hermawan Wijaya
Asian Journal Science and Engineering Vol 1 No 1 (2022): Asian Journal Science and Engineering
Publisher : CV. Creative Tugu Pena

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1100.081 KB) | DOI: 10.51278/ajse.v1i1.396

Abstract

Nowadays, the aerospace sector is growing very rapidly. One of the newest technologies is unmanned aerial vehicle. This UAV has functions to monitor disaster, mapping, espionage and shooting target. Therefore it needs a plane that can fly fast and agile. To achieve these characteristics, one of the most important things is the design of the wings. Some of the important parameters contained in the wings are the type of airfoil, aspect ratio, wing area, taper ratio, and angle of attack. The article aims to analyze the type of airfoil MH32 as well as the effect of the parameter taper ratio with variations of 0.2, 0.4, 0.6 in variations of angle of attack 0 °, 3 °, 6 °, 12 ° and 15 ° to the value of coefficient of lift and coefficient of drag. The method used in this research is experimental with a computational approach using a computer, the advantage of this method is that it does not need a real plane shape. The type of simulation used is Computational Fluid Dynamic (CFD) found in Ansys Fluent. From the simulation, value of coefficient of lift, coefficient of drag, and image of pressure contour and streamline velocity were obtained. All the data was processed and analyzed, then the result is that the taper ratio 0.4 has the highest lift to drag ratio of 19,417. It means that it has the highest value of the coefficient of lift and has the lowest coefficient of drag. These simulated results are validated with experimental from UIUC (University of Illinois at Urbana-Champaign) 1996. The conclusion of this study is that the smaller the taper ratio, the greater the value of the lift coefficient. Then increase the angle of attack to make the value of the lift coefficient is also getting bigger. Keywords: Simulation Effect Airfoil, Coefficient Lift, Coefficient Drag
Effects of Eugenol and Cineol Compound on Diffusion Burning Rate Characteristics of Crude Coconut Oil Droplet Helen Riupassa; Suyatno Suyatno; Hendry Y. Nanlohy; Andi Sanata; Trismawati Trismawati; Rachmat Subagyo; Satworo Adiwidodo; Muhammad Akhlis Rizza; Masaki Yamaguchi; Takuya Tomidokoro; Selcuk Sarikoc
Automotive Experiences Vol. 6 No. 1 (2023)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.8150

Abstract

The burning rate of coconut oil droplets has been investigated experimentally by adding bio-additives of clove oil and eucalyptus oil. Tests were carried out with single droplets suspended on thermocouples at room atmospheric pressure, and room temperature and ignited with a hot wire. The addition of clove oil and eucalyptus oil as bio-additives into coconut oil was 100 ppm and 300 ppm, respectively. The droplet combustion method was chosen to increase the contact area between the air and fuel so that the reactivity of the fuel molecules increases. The results showed that the eugenol compounds contained in clove oil and cineol compounds in eucalyptus oil were both aromatic, and had an unsymmetrical carbon chain geometry structure. Furthermore, this factor can potentially accelerate the occurrence of effective collisions between fuel molecules. Therefore the fuel is combustible, as evidenced by the increased burning rate, where the results show that without bio-additives, the burning rate of crude coconut oil (CCO) is about 0.7 seconds. These results are 0.15 to 0.2 seconds slower than CCO with bio-additive, which is around 0.55 to 0.6 seconds. Moreover, from the observations, it was found that the highest burning rate was achieved in both bio-additives with a concentration of 300 ppm.
PEMBUATAN LAMPU PERINGATAN JALAN BERTENAGA SURYA DI DESA SUMBERINGIN KIDUL, NGUNUT, TULUNGAGUNG Kris Witono; Asrori Asrori; Satworo Adiwidodo; Achmad Walid; Eko Yudiyanto; Agus Sujatmiko
Jurnal Abdimas UNU Blitar Vol 5 No 1 (2023): Volume 5 Nomor 1, Juli 2023
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/jppnu.v5i1.203

Abstract

Persimpangan jalan utama di RT/RW 03/03 Desa Sumberingin Kidul Kecamatan Ngunut Kabupaten Tulungagung sering terjadi kecelakaan, akibat banyak kendaraan yang melewati jalan tersebut tidak mengurangi laju kendaraannya dan mendapatkan kejutan adanya kendaraan tiba tiba keluar dari perempatan atau warga yang menyeberang, serta tidak begitu tampak dari jalur utama. Kondisi ini tentunya membahayakan bagi pengendara maupun warga yang melewati perempatan tersebut. Untuk mengatasi kondisi tersebut, dibutuhkan lampu peringatan jalan bertenaga surya yang handal dan berbasis energi mandiri. Proses kegiatan berlangsung mulai dari survey di tempat, analisa permaslahan dan solusi yang harus diselesaikan. Perencanaan kegiatan disusun untuk menentukan kebutuhan bahan dan peralatan, pendampingan pembuatan unit lampu peringatan jalan dilakukan dengan pemberdayaan masyarakat sampai dengan pemasangannya. Peran serta masyarakat dilibatkan untuk peningkatan pengetahuan dan ketrampilan warga di bidang fabrikasi dan instalasi lampu bertenaga surya. Hasil kegiatan ini terpasang lampu peringatan jalan bertenaga surya dengan sepsifikasi Panel Surya monokristal 100 Wp, Solar Charger Controller MPPT 10 A, Baterai (accu) 12V 65 Ah, Lampu Peringatan Jalan LED 40 W, kabel dan perlengkapan lainnya. Adanya lampu peringatan jalan ini berdampak pada peningkatan keselamatan aktivitas warga di lingkungan RT/RW 03/03 Sumberingin Kidul Kecamatan Ngunut Kabupaten Tulungagung.
The Effect of Location Class Category and Pipe Wall Thickness on Risk Level Onshore Pipeline Oil Zakki Fuadi Emzain; Makhmudul Fikri; Satworo Adiwidodo; Ratna Monasari; Talifatim Machfuroh
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4082

Abstract

Pipelines are essential infrastructure for efficient oil and gas production operation, necessitating their continuous and reliable functionality in all locations and circumstances. Nevertheless, the pipeline can fail during operation due to multiple detrimental variables. This study evaluated the impact of the location classification category and pipe wall thickness on the risk level of onshore pipelines. The risk assessment method employed was a semiquantitative approach derived from the reference "Pipeline Risk Management Manual" by W. Kent Muhlbauer. The distributing crude oil pipeline, which spans a distance of 18 kilometers and has a diameter of 6 inches, was evaluated. The evaluation yielded a pipeline relative risk score of 0.91, classifying the pipeline as belonging to risk category 1B. Following this, the assessment findings were analyzed for all 36 pipeline segments, classifying 26 segments in the 1B category and the remaining 10 segments in the 2B category. From the analysis results, the difference between the two risk categories was produced by differences in location class categories, where the pipeline segment in location class 1 creates a 1B risk category; meanwhile, class 3 produces a 2B risk category. Furthermore, a pipeline with a wall thickness of 5.156 inches is associated with a risk score of 0.81, but a wall thickness of 4.1 inches yields a score of 1.41. These results indicate that the location class category and pipe wall thickness significantly impact the risk of onshore pipelines.
Implementation of Failure Mode and Effect Analysis (FMEA) for centrifugal pump maintenance in water supply distribution system Zakki Fuadi Emzain; Zean Galang Wardhana; Satworo Adiwidodo; Siti Duratun Nasiqiati Rosady; Prasetyo Prasetyo; Muhammad Andi Nova
Jurnal Polimesin Vol 22, No 3 (2024): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i3.4739

Abstract

A centrifugal pump is an essential mechanical device in the Regional Drinking Water Company (PDAM) to distribute sterile water from the reservoir to local community houses by flowing the fluid through the pipeline. However, improper and inadequate maintenance of centrifugal pumps can result in component damage, including bearings that are broken, ripped, or damaged mechanical seals. Therefore, for the water supply to continue smoothly, proper maintenance needs to be carried out so that the engine's performance will be maintained and last longer. This study aims to conduct a maintenance analysis on centrifugal pumps utilized by the PDAM of Madiun City. The Failure Modes and Effects Analysis (FMEA) method was employed to assess the potential failure of a system, design, process, or service by implementing a systematic approach to analyze damage and devise maintenance strategies. The FMEA analysis revealed that the shaft of the centrifugal pump component had the highest Risk Priority Number (RPN) value, which amounts to 294. The wearing ring had the lowest RPN value among the centrifugal pump components, with a value of 54. The Pareto diagram results classified six components: shaft, clutch, stuffing box, motor, impeller, and mechanical seal to recommend preventative maintenance action. Additionally, three other components suggested for corrective maintenance were the bearing, packing, and wearing rings
Simulation of Effect of Airfoil MH32 with Variation Taper Ratio and Angle of Attack Coefficient Lift and Drag Fixed wing Unmanned Aircraft Adiwidodo, Satworo; Wijaya, Andy Hermawan
Asian Journal Science and Engineering Vol. 1 No. 1 (2022): Asian Journal Science and Engineering
Publisher : CV. Creative Tugu Pena

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51278/ajse.v1i1.396

Abstract

Nowadays, the aerospace sector is growing very rapidly. One of the newest technologies is unmanned aerial vehicle. This UAV has functions to monitor disaster, mapping, espionage and shooting target. Therefore it needs a plane that can fly fast and agile. To achieve these characteristics, one of the most important things is the design of the wings. Some of the important parameters contained in the wings are the type of airfoil, aspect ratio, wing area, taper ratio, and angle of attack. The article aims to analyze the type of airfoil MH32 as well as the effect of the parameter taper ratio with variations of 0.2, 0.4, 0.6 in variations of angle of attack 0 °, 3 °, 6 °, 12 ° and 15 ° to the value of coefficient of lift and coefficient of drag. The method used in this research is experimental with a computational approach using a computer, the advantage of this method is that it does not need a real plane shape. The type of simulation used is Computational Fluid Dynamic (CFD) found in Ansys Fluent. From the simulation, value of coefficient of lift, coefficient of drag, and image of pressure contour and streamline velocity were obtained. All the data was processed and analyzed, then the result is that the taper ratio 0.4 has the highest lift to drag ratio of 19,417. It means that it has the highest value of the coefficient of lift and has the lowest coefficient of drag. These simulated results are validated with experimental from UIUC (University of Illinois at Urbana-Champaign) 1996. The conclusion of this study is that the smaller the taper ratio, the greater the value of the lift coefficient. Then increase the angle of attack to make the value of the lift coefficient is also getting bigger. Keywords: Simulation Effect Airfoil, Coefficient Lift, Coefficient Drag
The Effect Of Pitch Ratio On Screw Turbine Performance With Tip Fin Adiwidodo, Satworo; Ahmad, Masrur Maulana
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.75-82

Abstract

A water turbine is an energy conversion machine that converts water head into shaft movement. In screw-type turbines, performance is influenced by several parameters including outer diameter, inner diameter, rotor length, head angle, number of blades, and pitch distance. This research uses a screw turbine type with a tip fin. The research aims to determine the performance of screw turbines with tip fins on mechanical power and efficiency. The research independent variables consist of pitch ratio and flow rate. The pitch ratio variations used are 1.2; 1.4 and 1.6 while the variations in flow rate used are 3 l/s, 3.5 l/s, and 4 l/s. The method used in this research is experimental. This study's data analysis employed the two-way Anova method with an alpha (α) of 5%. Anova's results show that the P-value of the interaction of the two independent variables, pitch ratio and water discharge, is <0.05, meaning that the independent variables have a significant influence on the performance of the screw turbine. The highest turbine performance results were at a pitch ratio of 1.4 at a water flow rate of 4 l/s resulting in an efficiency value of 34.91% and a mechanical power value of 6.82 watts at a rotational speed of 125 RPM. The lowest turbine performance results at a pitch ratio of 1.2 with a flow rate of 3 l/s resulting in an efficiency of 22.64% and a mechanical power of 3.32 watts at a rotational speed of 56 RPM.
The Performance Comparison of Battery Charging Using MPPT and PWM Controllers on Amorphous Solar Panel-Based E-Scooters Asrori, Asrori; Adiwidodo, Satworo; Faizal, Elka; Martawati, Mira Esculenta; Mardyansyah, AA
Journal of Engineering and Scientific Research Vol. 6 No. 1 (2024)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v6i1.151

Abstract

Solar Panel-Based Electric Scooter (E-Scooter) is an electric vehicle in the form of a scooter that uses solar panels as a source of electrical energy for charging batteries and a BLDC motor as a wheel drive. With the development of the E-Scooter, it is necessary to know how to charge the battery. The purpose of this research is to determine the type of Solar Charge Controller (SCC) that can maximize battery charging on the E-Scooter. The research method is to compare SCC MPPT and SCC PWM. The research was conducted by monitoring the output current and voltage of the solar charger controller generated by the solar panels every 10 minutes. After that the recorded data will be stored in the monitoring device's storage memory for further processing. The results of the data that have been obtained on the e-scooter using the SCC MPPT type are capable of producing a power of 9.05 W with a current value of 0.33 A and a voltage of 27.47 V. Meanwhile, the PWM type SCC is capable of producing 8.22 W of power with a current value of 0.30 A and a voltage of 27.42 V. So that the MPPT type SCC is more economical than PWM for charging when the e-scooter is not moving. For the running conditions of the MPPT type SCC e-scooter is capable of producing 7.36 W of power with a current value of 0.27 A and a voltage of 27.26 V. Meanwhile, the PWM type SCC is capable of producing a current of 6.81 W with a value of 0.25 A and a voltage 27.24 V. So that the MPPT type SCC is more efficient than PWM for charging when the e-scooter is running.
Co-Authors Abrari, Arya Rafi Achmad Fauzan Hery Adelwise, Probo Yekti Salsabilla Agus Hardjito Agus Setiawan Agus Sujatmiko Ahmad, Masrur Maulana Ali Mokhtar Alia*, Nila Amrullah, Utsman Syah Amrullah, Utsman Syah Andi Sanata Andy Hermawan Wijaya Anggit Murdani Ari Purnomo Aji Asrori Asrori Asrori Asrori Asrori Asrori Asrori Asrori Asrori Asrori Auzini Widyasari Auzini Widyasari Bagus Wahyudi Bagus Wahyudi Bagus Wahyudi BAYU PRANOTO Burniadi Moballa Eko Yudiyanto Elka Faisal Elka Faizal Etik Puspitasari Etik Puspitasari Etik Puspitasari, Etik Faizal, Elka Fatkhur Rohman Fengky Adie Perdana, Fengky Adie Fitrony, Muhammad Aghist Gunawan, Chandra Hamim, Mohammad Rohman Hangga Wicaksono Hangga Wicaksono Hari Rarindo Hari Rarindo Hari Rarindo Harie S Jaya Haris Puspito Buwono Haris Puspito Buwono Helen Riupassa Hendry Y. Nanlohy Hilmi Iman Firmamansyah Hilmi Iman Firmamansyah Hilmi Iman Firmansyah Imam Mashudi Imandini, Putri Dwi Kris Witono Kris Witono Lucky Pradigta Setiya Raharja Makhmudul Fikri Mardyansyah, AA Martawati, Mira Esculenta Masaki Yamaguchi Massuradi Simbolon Mira Esculenta Martawati Mira Mira Mochammad Farhan Aprilianto Moh. Hartono Mohammad Rohman Hammim Muhammad Akhlis Rizza Muhammad Andi Nova Muhammad Aries K Muhammad Fakhruddin Mustaghfirin, Muh. Anis Mustapa, Mohammad Sukri Nila Alia Nur Faiqa Binti Ismail Nur Faiqa Binti Ismail Nurhadi Nurhadi Pipit Wahyu Nugroho Pondi Udianto Pondi Udianto Pranoto, Bayu Prasetyo Prasetyo R N Akhsanu Takwim Rachmat Subagyo Rahmad, Cahya Ratna Monasari Ridho Surya Setiabudi Rifa’i, Muhamad Rilis Eka Perkasa Riyanto Heri Nugroho Sarjiyana Selcuk Sarikoc Siti Duratun Nasiqiati Rosady Sudarman Sudarman Sugeng Hadi Susilo Sugeng Hadi Susilo Sulistyono Sulistyono Suyatno Suyatno Syamsul Hadi Takuya Tomidokoro Talifatim Machfuroh Talifatim Machfuroh Teguh Hady Ariwibowo Transisma Budiarta Trismawati Trismawati Tsani, Charitsma Valeria, Sza Sya Monica Viyus, Vinan Walid, Achmad Widjanarko Widjanarko, Widjanarko Wijaya, Andy Hermawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Yuniarto Agus Winoko Yuniarto Agus Winoko Zakki Fuadi Emzain Zakki Fuadi Emzain Zean Galang Wardhana