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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Pengabdian UntukMu NegeRI Jurnal Surya Teknika Unri Conference Series: Community Engagement Journal of Rural and Urban Community Empowerment Journal of Mechanical Design and Testing (JMDT) Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) METAL : Jurnal Sistem Mekanik dan Termal Proksima BATOBO: Jurnal Pengabdian Kepada Masyarakat

Ridwan Abdurrahman

Universitas Riau

Author-ID : 4178133

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

Published : 19 Documents Claim Missing Document

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Simulasi Pengaruh Variasi Sudut Chamfer Forging Terhadap Penyambungan Material Mild Steel Pada Las Gesek Rotari Muhammad Nafis; Yohanes Yohanes; Ridwan Abdurrahman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

The welding process is carried out in the solid phase. The friction welding process that occurs from the direct conversion of mechanical energy into friction into thermal energy. The process of friction between two surface objects in the direction of the direction. The connection process is carried out on the surface with a flame temperature (melting point), so that the connection can be ascertained between the surface of the material being welded and the joints of the same nature. In the previous study, measuring when measuring data when testing, the exact time when loading forging, the temperature at the time of welding and the temperature propagation of the specimen along. Therefore, to find out the problems needed for this, it is necessary to do an evaluation before conducting welding so that we can get groupings or predictions to do welding with good results, and with this simulation it is also expected to be studied according to the temperature of the specimen on welding requirements. From the simulation results, the exact time and temperature for giving an average forging pressure at each angle is 30° (132.27 seconds; 1.070,2 °C), 45° (127.91 seconds; 1.070,1 °C), 60° (123 ,77 seconds; 1.071,2 °C).Keywords : Friction, Steel, Chamfer Interface Area, Forging

Simulasi Distribusi Termal Las Gesek Rotari Pada Penyambungan Mild Steel Berbasis Abaqus Andika Saputra; Yohanes Yohanes; Ridwan Abdurrahman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The friction welding process occurs as a result of the direct conversion of mechanical energy in the form of friction into thermal energy. Thermal in the region near the peak joint has a significant effect on the formation of flash, the hot zone and the strength of the rotary friction welded joint. In this study, observations were made on the validation of the thermal distribution with the welding time reaching flash in experimental testing using a thermocouple sensor measuring instrument and the simulation using ABAQUS software. The test results will be carried out with a tensile test to see the maximum tensile strength of the variation of the chamfer angle 0 °, 15 °, 30 °, 45 °. The conclusions obtained are: (1) The form of thermal distribution from experimental and simulation testing is considered to be in accordance with the percentage error of the maximum thermal value of 37.55%. This is influenced by the slow thermal propagation on the friction surface. (2) Requirement of thermal distribution time in simulation and experimental testing, the shortest time is 59 seconds and 71 seconds at 0 ° chamfer angle and the longest time at 45 ° chamfer angle with 600 seconds and 494 seconds for simulation and experimental testing. This is influenced by the friction surface area and the small heat flux value. (3) The maximum tensile test results were obtained at a 45 ° chamfer angle of 505.53 MPa. Keywords: Rotary Friction Welding, Thermal Distribution, Abaqus

Pengaruh Sudut Chamfer Terhadap Timing Melt Point Pada Penyambungan Material Mild Steel Menggunakan Las Gesek Rotari Muhammad Ryan Detra; Yohanes Yohanes; Ridwan Abdurrahman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Rotary friction welding is a type of friction welding which is a type of solid state welding where the welding process is carried out in a solid phase. The friction welding process occurs as a result of the direct conversion of mechanical energy in the form of friction into thermal energy. This research discusses how the effect of the chamfer angle on the timing melt point and the maximum tensile strength in joining mild steel material with the rotary friction welding method, namely by varying the chamfer angle at 0°, 15°, 30°, 45°, 60°. This research uses analytical and experimental methods to analyze the effect of the chamfer angle on the timing melt point. The results of the analysis show that the greater the chamfer angle, then, longer the timing melt point. The lowest average maximum tensile strength value of the joint results was obtained at the variation of the chamfer angle of 0° is 421.17 Mpa and the highest average maximum tensile strength value of the joint results was obtained at the variation of the chamfer angle 45° is 505.53 Mpa. Keywords: Rotary Friction Welding, Chamfer, Timing Melt Point

The Effect of The Solar Heat Flux to The Optimized Solar Chimney Power Plant: An Experimental Study Hery Mada Indra Paska; Adhika Widyaparaga; F Fauzun; Abrar Ridwan; Ridwan Abdurrahman
Journal of Mechanical Design and Testing Vol 2, No 1 (2020): Articles
Publisher : Departemen Teknik Mesin dan Industri, Universitas Gadjah Mada

The Solar Chimney Power Plant (SCPP) is an energy conversion system that would absorb solar thermal energy and convert heat air into electrical energy using a collector. The main disadvantage of the SCPP is that low efficiency because less solar heat flux can be converted to the electrical power affected by the design of the SCPP. This study was designed the SCPP by theoretical calculation for producing electrical power and experimented by designing the SCPP use a chimney with divergent shape, a collector with convergent shape, a turbine generator with 3 blades, and coating some materials at the collector’s ground to increasing the electrical power. The purpose of this work was to study about the impact of the solar heat flux ( ) to the temperature of air, to the velocity of air, to the power electricity and compare between power generated from theoretical calculations design and the experiments result. The result showed that the SCPP with the optimized design affect the performance of the SCPP’s output power. The power generated in this experiment is 0.1 Watt. That value is greater than output power from theoretical calculations about 42.8% for the same input solar heat flux ( ) 1118 W/m2 both for theoritical and experimental.

The Study of Male-Female Chamfer Angle Effect on Aluminum 6061 Forging at Rotary Friction Welding Process Yohanes Yohanes; Anugra Fikri Azmi; Ridwan Abdurrahman
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 65 No 2 (2021): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

This research aims to investigate male-female chamfer angle effect on forging pressure, specimen length and the maximum tensile strength in splicing 6061 aluminum material, which used the rotary friction welding process. This research employed the analytical method to determine the timing of forging pressure as an initial reference to conduct the experimental study for the specimens test. The specimens were tested by varying the male-female chamfer angle, namely 0°, 15°, 30°, 45°, 60°. The results test were obtained the longest application of forging pressure at the male-female chamfer angle of 60° and the fastest application of forging pressure at the male-female chamfer angle of 15°. The change in length of the specimen during the welding process for each variation of the male-female chamfer angle varies due to the friction time different. The largest change in length was at the male-female chamfer angle of 15° and the smallest change in length at the male-female chamfer angle of 60°. The maximum tensile strength was obtained at the variation of male-female chamfer angle of 60° with a value of 226.47 MPa.

Experimental & Numerical study on COVID-19 Waste Treatment Using a Gasification Type Incinerator: Laboratory Scale Ridwan Abdurrahman; Abrar Ridwan; Ahmad Kafrawi Nasution; Muhammad Kunta Biddinika
METAL: Jurnal Sistem Mekanik dan Termal Vol 5, No 2 (2021): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Due to the COVID-19 pandemic, the use of personal protective equipment in the community has contributed to the increasing amount of medical waste. Medical waste from the COVID-19 pandemic is classified as infectious medical waste which is waste related to patients who need isolation from infectious diseases. one of the solutions offered is a medical waste incinerator. By studying the medical waste incinerator model in the hospital, the researchers finally took the initiative to do a simple incinerator design. the incinerator to be used is updraft gasifier type. It is hoped that the use of this incinerator will be able to solve the existing medical waste problem. In this study, the researchers use experemental approach to get the basic data from the reactor. After gain the data, then the researcher use numerical approach which is using ansys softwere to get a better look of the temperature contour on the rector. From both study, researcher can conclude tha it would take an upgrade on the existing blower to incenerate the medical waste on a safely temperature.

Innovation for Making Portable Induction Furniture as a Solution for System Waste Handling Post-vaccination COVID-19 Vaccine Ridwan Abdurrahman; Ahmad Kafrawi Nasution; Ayub Satria
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 2 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.6.2.138-142.2022

The world was shocked by the outbreak of a new virus called Coronavirus Disease 2019 (COVID-19) in 2020. The use of personal protective equipment in the community during a pandemic resulted in an increase in the amount of medical waste. Syringe is one of the medical waste from the COVID-19 pandemic which is classified as metal waste. One of the solutions offered is a medical waste incinerator. By studying the medical waste incinerator model in hospitals, the researchers finally took the initiative to design a simple incinerator. The incinerator to be used is a portable induction type. It is hoped that the use of this incinerator will be able to overcome the existing medical waste problem. Keywords: Evaluation, Incinerator, Garbage, Induction.

Analisis Kebocoran Boiler Pipe Akibat Korosi pada Recovery Boiler 5 PT. ABC. Ridwan Abdurrahman; Dedy Masnur; Abdul Rahman
Proksima Vol 1 No 1 (2023): Jurnal ProKsima
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/proksima.1.1.29-32

Boiler is one component that is widely used in the energy generation industry and reactors. One of the main components of the boiler is the boiler pipe. In field activities, there was a leak in the boiler pipe which experienced corrosion and erosion of the walls of the pipe. This condition results in a decrease in power and capacity in the boiler. The purpose of this practical work is to observe the causes of damage to the boiler pipe, and provide recommendations for prevention due to damage to the boiler pipe. The methods used are: literature study, observation, interviews, and measurement. The results obtained: (1) The calculation results show that the value of the Reynolds number obtained is 16,032,025.86 (Re>4000, turbulent flow). (2) The cause of corrosion on the boiler pipe is due to liquid droplet impingment which is accompanied by an increase in flow velocity and the occurrence of two phases (steam and water) thereby accelerating depletion in the boiler.

Calculation Analysis of Steam Consumption Efficiency on The Dryer Section in Paper Machine Abdillah Taqiyuddin; Ridwan Abdurrahman
Proksima Vol 1 No 2 (2023): Jurnal ProKsima
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/proksima.v1i2.15

This research aims to analyze the efficiency of steam consumption in the Dryer Section at the Paper Machine. The research method involves calculating the actual steam consumption efficiency and comparing it with the TAPPI efficiency standard. The research results show that the average steam consumption efficiency for grade W/FIPF35-70 reached 94.51%, exceeding the TAPPI standard of 86%. However, some observations indicate substandard results, which can be caused by factors such as raw material quality, process settings, and equipment wear. The conclusions of this research provide insight into the factors that influence steam consumption efficiency, providing a basis for improving performance in Dryer Section Paper Machine.

Pemanfaatan Panas Buang Tungku Gasifikasi Penghasil Listrik Menggunakan Termoelektrik Sebagai Solusi Limbah Pabrik Tahu di Desa Tanah merah Kecamatan Siak Hulu Kabupaten Kampar, Provinsi Riau Ridwan Abdurrahman; Abrar Ridwan; Lega Putri Utami
BATOBO: Jurnal Pengabdian Kepada Masyarakat Vol 1 No 1 (2023): BATOBO: Juni 2023
Publisher : Jurusan Teknik Elektro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/batobo.1.1.29-35

Limbah pabrik tahu di Desa Tanah Merah, Kecamatan Siak Hulu, Kabupaten Kampar, Provinsi Riau, dapat menjadi masalah lingkungan yang signifikan. Limbah ini terutama terdiri dari panas buang yang dihasilkan selama proses produksi tahu menggunakan tungku gasifikasi. Namun, panas buang ini biasanya tidak dimanfaatkan secara efisien dan hanya terbuang sia-sia. Oleh karena itu, perlu dicari solusi yang ramah lingkungan dan berkelanjutan untuk memanfaatkan panas buang ini. Dalam penelitian ini, kami mengusulkan pemanfaatan panas buang tungku gasifikasi pabrik tahu menggunakan modul termoelektrik. Modul termoelektrik adalah perangkat yang dapat mengubah perbedaan suhu menjadi energi listrik. Dalam konteks ini, panas buang dari tungku gasifikasi akan digunakan untuk menghasilkan suhu tinggi pada satu sisi modul termoelektrik, sedangkan suhu lingkungan akan berfungsi sebagai suhu rendah pada sisi lainnya. Perbedaan suhu ini akan menciptakan gradien suhu yang akan menghasilkan potensi listrik melalui efek Seebeck dalam modul termoelektrik. Dengan menerapkan sistem ini, panas buang dari tungku gasifikasi dapat diubah menjadi energi listrik yang dapat dimanfaatkan untuk memenuhi kebutuhan listrik pabrik tahu. Selain itu, ini juga akan membantu mengurangi emisi gas rumah kaca dan dampak negatif lainnya terhadap lingkungan. Dengan memanfaatkan energi panas yang sebelumnya terbuang sia-sia, pabrik tahu dapat mengurangi penggunaan energi konvensional dan meminimalkan dampak negatif terhadap lingkungan. Penelitian lebih lanjut dan implementasi praktis perlu dilakukan untuk memastikan kelayakan dan efektivitas pemanfaatan panas buang ini dalam skala yang lebih besar.

Co-Authors Abdillah Taqiyuddin Abdul Rahman Abrar Ridwan Adhika Widyaparaga Ahmad Fudholi Ahmad Kafrawi Nasution Andika Saputra Anita Susilawati Anugra Fikri Azmi Awaludin Martin Ayub Satria Azis, Azridjal Bintal Amin Chicka Willy Yanti Dedy Masnur, Dedy Fauzun Fauzun Hery Mada Indra Paska Ilhan, Muhammad Rifky Lega Putri Utami Muhammad Kunta Biddinika Muhammad Nafis Muhammad Ryan Detra N. Nazaruddin Pradini, Ulfa Rizki Putri Nawangsari, Putri Putri Nawangsari, Putri Nawangsari Rahmat Iman Mainil Rasyad, Abdur Rindi Metalisa, Rindi SISPA PEBRIAN Solly Aryza Syafri Wasilah Yohanes Yohanes Yohanes Yohanes Yohanes

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