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All Journal Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Abdimas PHB : Jurnal Pengabdian Masyarakat Progresif Humanis Brainstorming Infotekmesin Accurate: Journal of Mechanical Engineering and Science Journal of Community Development Abdi Masya Proceedings Series on Social Sciences & Humanities Jurnal Abdi Panca Marga Teknik: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Pengabdian Jurnal Abdimas Damhil: Jurnal Pengabdian kepada Masyarakat
Radhi Ariawan
Politeknik Negeri Cilacap
Religion Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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Characteristic Study of Film Thickness on Countercurrent of Water-Air Flow in Hot-Leg Simulator of L/D = 25 by using Parallel-Wire Methods Ariawan, Radhi
Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 2, No 2 (2017)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (589.269 KB) | DOI: 10.22219/jemmme.v2i2.5028

Abstract

In water-air counter current flow, relative movement between water and air occurred. The results of this movement interfacial instability occurred in the flow, causing the liquid film moves up and down. In this study, film thickness characteristics of water-air counter current flow in L/D=25 hot-leg simulator are identified. Film thickness measurement was carried out using parallel-wire sensor consists of parallel wires installed through the pipe’s cross sectional area with spacing of 5 mm. sensor has wire diameter of 0,51 mm made from copper coated in silver. This experimental study was carried out with water superficial velocity (JL) variation of JL=0,003 m/s, JL=0,032 m/s, and JL=0,065 m/s. From the film thickness measurement, film thickness characteristics of water-air counter current flow are identified based on the flow pattern and the position of onset of flooding. JL variation affects the occurring time of flow pattern change, hydraulic jump, and onset of flooding. Hydraulic jump and onset of flooding position occurred further from the bend as the JL increased. Onset of flooding occurrence time is faster as the JL bigger.
Characteristic Study of Film Thickness on Countercurrent of Water-Air Flow in Hot-Leg Simulator of L/D = 25 by using Parallel-Wire Methods Radhi Ariawan
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 2 No. 2 (2017)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v2i2.5028

Abstract

In water-air counter current flow, relative movement between water and air occurred. The results of this movement interfacial instability occurred in the flow, causing the liquid film moves up and down. In this study, film thickness characteristics of water-air counter current flow in L/D=25 hot-leg simulator are identified. Film thickness measurement was carried out using parallel-wire sensor consists of parallel wires installed through the pipe’s cross sectional area with spacing of 5 mm. sensor has wire diameter of 0,51 mm made from copper coated in silver. This experimental study was carried out with water superficial velocity (JL) variation of JL=0,003 m/s, JL=0,032 m/s, and JL=0,065 m/s. From the film thickness measurement, film thickness characteristics of water-air counter current flow are identified based on the flow pattern and the position of onset of flooding. JL variation affects the occurring time of flow pattern change, hydraulic jump, and onset of flooding. Hydraulic jump and onset of flooding position occurred further from the bend as the JL increased. Onset of flooding occurrence time is faster as the JL bigger.
Efek Temperatur Pengarangan Cangkang Kerang dan Tulang Sapi Terhadap Proximate Mohammad Nurhilal; Rosita Dwityaningsih; Theresia Evila Purwanti Sri Rahayu; Radhi Ariawan
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1018

Abstract

Studies on the use of animal waste as charcoal ingredient in the needs of activated charcoal material has been carried out and developed. Activated charcoal is produced through activation process at a certain temperature, condition, and time in order to creat a higher carbon content in charcoal . One of the important factors in the manufacture of activated charcoal is the temperature during the production process. The purpose of this study is to discuss the influence of temperature factor of mussel shells and beef bones on water content, ash content, volatile matter and fixed carbon during the charcoal production process. The research is carried out through experimental method of making chorcoal with temperature variations of 400, 500, 600, 700, and 800 oC. The result of the experiment shows the highest ash content and water content found respectively in beef bone charcoal of 800 oC which is 98,697 %, and of 400 oC which is 4,942 %, while the highest volatile matter and fixed carbon levels are found in clam shell charcoal of 800 oC which is 6,717 %, and of 500 oC which is 43,282 %. The result concluded that the effect of the temperature of the production process affects the water content, ash, volatile matter and fixed carbon.
Analisa Karakteristik Dielektrik dan Kimia Minyak Gas To Liquid (GTL) Sebagai Media Isolasi Transformator Saepul Rahmat; Radhi Ariawan
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.857

Abstract

Gas to Liquid transformer oil with iso-paraffinic as the main constituent is an alternative insulating medium with fewer impurities, therefore its insulating strength is increasing. This study aims to determine the relationship of changes in the dielectric characteristics of transformer oil to changes in the chemical characteristics of gas to liquid oil. The object of research for gas to liquid oil is treated as the actual condition of the transformer at a temperature of 1000C, then thermal aging was carried out with temperatures of 1200C and 1500C starting from 362 hours to 1008 hours. the dielectric loss value of transformer oil still met the standard value used, namely ASTM D924 of 0.0015%, but the resistivity value was not in accordance with the standard specified by IEC 60442 which was 60 G????m. The value of chemical characteristics such as water content is above the ASTM D1533 standard of 35 mg/kg, the value of the acid content of the oil is above the ASTM D974 standard of 0.20 mg KOH/g, and the color scale value exceeds the predetermined limit of ASTM D1500 by 0,5.
Kajian Keruangan Pola Sebaran Strategi Pembelajaran Dalam Kegiatan PPL II (Studi Kasus: Mahasiswa S1 Pendidikan Geografi Universitas Nusa Cendana di Kota Kupang) Arfita Rahmawati; Radhi Ariawan
Proceedings Series on Social Sciences & Humanities Vol. 1 (2021): Proceedings of the Integration of Disaster Mitigation Learning in School
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.924 KB) | DOI: 10.30595/pssh.v1i.75

Abstract

Practical Field Experience (PPL) II is a compulsory subject, especially for prospective teachers. Practical Field Experience (PPL) II is a time for teaching students to practice learning knowledge in school partners. The Covid-19 pandemic occurred changed the PPL II system from offline to online. The online PPL system provides new experiences for students, including in determining the learning strategies to use. The purpose of this study to determine the distribution patterns of learning strategies in PPL II so can saw the learning strategies that are most popular among students and their spatial patterns. This study used questionnaire data that was distributed to 88 students then carried out NNA analysis to determine the spatial pattern and linear regression analysis. Based on the research results, it is known that the popular learning strategy used by students when PPL II is a cooperative learning strategy with a value of 44.318%. The spatial pattern based on the distribution of learning strategies used for cooperative learning, contextual and Problem Based Learning is clustered or clustered. As for the random patterned inquiry learning strategy. There is an influence from the learning strategies used by students on the level of satisfaction of school partners.
Pengaruh Sudut Sudu Turbin Jenis Taper Terhadap Tip Speed Ratio (TSR) dan Power Coefficient (CP) pada Turbin Angin Horisontal Berbasis Q-Blade Roy Aries Permana Tarigan; Radhi Ariawan; Adam Jauza Maulana; Wais Al Khorni
Accurate: Journal of Mechanical Engineering and Science Vol 3, No 1 (2022): April 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i1.1215

Abstract

Pemanfaatan energi angin sebagai pembangkit listrik masih perlu untuk ditingkatkan, dengan melihat performa turbin yang tidak selalu sama pada kondisi daerah yang berbeda. Penelitian ini bertujuan untuk mengetahui pengaruh sudut sudu (30, 50, 70, dan 100) turbin terhadap TSR dan CP dengan menggunakan simulasi Q-Blade. Software Q-Blade digunakan untuk mengetahui perbandingan nilai CP dan TSR, sehingga dapat memprediksi nilai daya yang dihasilkan pada putaran sudu. Data yang digunakan pada penelitian ini, sebagai variabel tetap, adalah tipe airfoil NACA 4412, jenis sudu taper, jumlah sudu (4), jari-jari sudu (0,3 m), kecepatan angin ± 3,6 m/s. Hasil simulasi yang ditampilkan berupa grafik hubungan CP terhadap perubahan TSR dan gambar simulasi pendistribusian beban yang terjadi pada geometri sudu. Nilai CP tertinggi dihasilkan dari sudut sudu 30 pada angka TSR 5, yaitu  ±0,4. Nilai pembebanan yang rendah pada daerah sumbu/rotor, pada variasi sudut sudu 30, menyeimbangkan gaya sentrifugal pada fluida yang berputar. Gaya sentrifugal menghasilkan gaya dorong pada turbin, sehingga sudu berputar dengan nilai CP yang tinggi pada daerah tersebut.
Pemetaan Kelas Kesesuaian Lahan Untuk Budidaya Tambak Dengan Metode Skoring Radhi Ariawan; Arfita Rahmawati
Infotekmesin Vol 12 No 2 (2021): Infotekmesin: Juli 2021
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v12i2.727

Abstract

Pond cultivation is a coastal sector’s potential in Nusawungu District. To optimize the potential of fish and shrimp ponds in Nusawungu District, mapping of the suitable coastal locations as pond cultivation areas was carried out. This research was included in descriptive – quantitative study of the suitability class of pond cultivation land by using the scoring method from the overlay parameter of land usage, soil type, soil texture, slope inclination, pond to river distance, and pond to beach distance. The land suitability class based on this method was divided into 3 (three) classes, suitable (S1), conditionally suitable (S2), and unsuitable (S3). The results showed that 48.32% or an area of 29.6008 km2, categorized S1 (suitable) as location for pond cultivation. Furthermore, the S2 (Conditionally suitable) class was recorded for 33.98% or an area of 20.8039 km2. S3 (unsuitable) class was recorded for 17.72% or an area of 10.8553 km2.
Analisis Kinematik Singularty Pada Manipulator 7 DOF Dengan Software Simulasi ROBOAnalyzer Nur Akhlis Sarihidaya Laksana; Radhi Ariawan; Unggul Satria Jati; Jenal Sodikin; Ulikaryani
Infotekmesin Vol 13 No 2 (2022): Infotekmesin: Juli, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i2.1538

Abstract

Studies related to manipulators are still being carried out, along with the times and needs. Utilization in manufacturing and fabrication has led to the development of many manipulators. Smooth, fast, and accurate movement continue to be developed. In the case of the multi manipulator, 7 DOF (Degree of Freedom) is a type of manipulator that has special features in terms of joints. Inverse kinematic is a parameter used to control the orientation and movement of the manipulator. 7 DOF has three singularity wrist, elbow, and shoulder. In the simulation, each singularity produces an inverse kinematic matrix which is used to control the movement of the manipulator. The method used is to determine the angle of motion of the joint (continues joint angel) with simulation to produce calculations that are fast, precise, accurate, and stable. The target of each joint with the theta value that has been determined by the singularity was successfully carried out with an error of 0%.
Pemanfaatan Bak Depurasi Yutuk (Undur – Undur Laut) di Desa Widarapayung Wetan Sebagai Upaya Menjaga Keamanan Pangan Ari Kristiningsih; Khoeruddin Wittriansyah; Santi Purwaningrum; Nur Wachid Adi Prasetya; Linda Perdana Wanti; Hety Dwi Hastuti; Radhi Ariawan; Nur Akhlis Sarihidaya
Abdi Panca Marga Vol 4 No 1 (2023): Jurnal Abdi Panca Marga Edisi Mei 2023
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM) Universitas Panca Marga Probolinggo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51747/abdipancamarga.v4i1.1309

Abstract

Yutuk, which is also known as undur - undur laut, is a typical souvenir from Widarapayung Wetan beach. The handling of yutuk before consumption by community groups processing yutuk is still in a simple way by soaking it in a bucket or tub. Depuration of yutuk or shellfish makes the dirt contained in the organs of the body come out and can reduce the heavy metal content contained therein. This Community Service activity aims to increase the education of yutuk processing groups to use the depuration method with a special yutuk tub with a recirculation system that uses natural filters such as ginger coral, zeolite and activated charcoal. The Community Service activity stage begins with interviews and field observations and then continues with a Focus Group Discussion (FGD) and then implements a yutuk depuration tub for the yutuk processing group in Widarapayung Wetan village. Through Community Service activity, the yutuk processing community groups are equipped with good and correct depuration techniques so that they can be achieved properly and the community can consume them safely and comfortably.
UJI FUNGSI DAN KALIBRASI SENSOR WATER FLOW YF-S201 BERBASIS ARDUINO UNO PADA MESIN PENJERNIH AIR SUNGAI Aziz Adela Rashad; Ulikaryani; Bayu Aji Girawan; Radhi Ariawan; Jenal Sodikin; Hety Dwi Hastuti
Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol. 3 No. 2 (2023): Juli : Jurnal Teknik Mesin, Elektro dan Ilmu Komputer
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/teknik.v3i2.1850

Abstract

Semi-automatic water purification machines are urgently needed by the people around the Sitopong river, Cilacap Regency. Required application and testing of the YF-S201 type water flow sensor based on Arduino Uno. This is done so that the application of the water speed sensor in the river water purification machine can be maximized. The research method used is a literature study related to Arduino Uno and conducting experiments. The experiments were carried out in the form of testing the water flow velocity sensor, carrying out the process of calibrating the water flow sensor. Sensor testing was carried out 10 times after calibration. Based on the calibration results, an average volume of 329 ml was obtained from the desired volume of 330 ml so that an error of 0.3% was obtained. Whereas at the desired volume of 600 ml, the average volume of the calibration results is 598 ml, it can be seen that an error of 0.3% is obtained at a volume of 600 ml. Function test on the water filling process with 10 trials obtained an accuracy of 99.6% for a 330 ml volume bottle and 99.6 ml for a 600 ml volume bottle.
Co-Authors Adam Jauza Maulana Akhlis Rahman Sari Nurhidayat Al Khorni, Wais Ardiansyah Pradana, Rizky Nur Arfita Rahmawati Ari Kristiningsih Aries Permana Tarigan, Roy Aziz Adela Rashad Bayu Aji Girawan Bayu Aji Girawan Dian Prabowo Dikky Kusuma Wijaya Dwi Cahyo, Rizal Agung Evila Purwanti Sri Rahayu, Theresia Girawan, Bayu Aji Hamid Abdillah Hastuti, Hety Dwi Hety Dwi Hastuti Ikhtiagung, Ganjar Ndaru Jati, Unggul Satria Jauza Maulana, Adam Jenal Sodikin Jenal Sodikin jenal, Jenal Sodikin Khoeruddin Wittriansyah Kristiningsih, Ari Linda Perdana Wanti Mohammad Nurhilal Nur Akhlis Sarihidaya Nur Akhlis Sarihidaya Laksana Nur Akhlis Sarihidaya Laksana Nur Akhlis Sarihidaya Laksana, Nur Akhlis Sarihidaya Nur Wachid Adi Prasetya Purwaningrum, Santi Rosita Dwityaningsih Roy Aries Permana Tarigan Sabtun Ismi Khasanah Saepul Rahmat Santi Purwaningrum Sarihidaya Laksana, Nur Akhlis Sodikin, Jenal Tarigan, Roy Tri Hannanto Saputra Ulikaryani Ulikaryani, Ulikaryani Unggul Satria Jati Unggul Satria Jati Wais Al Khorni Wanti, Linda Perdana Wittriansyah, Khoeruddin Wittriansyah, Khoerudin