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All Journal Jurnal Pendidikan Teknologi dan Kejuruan SPEKTRUM: Jurnal Pendidikan Luar Sekolah (PLS) JURNAL PENDIDIKAN TAMBUSAI Community Engagement and Emergence Journal (CEEJ) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik Jurnal Vokasi Mekanika Journal of Community Service Tsaqofah: Jurnal Penelitian Guru Indonesia MASALIQ: Jurnal Pendidikan dan Sains Al-DYAS : Jurnal Inovasi dan Pengabdian kepada Masyarakat

Irzal, Irzal

Unknown Affiliation

Author-ID : 1298913

Religion Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Other

Published : 35 Documents Claim Missing Document

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Title

Effect of Strong Welding Flow on the Violence of Low Carbon Steel Results of SMAW Welding with Electrodes 7018 Jasman, Jasman; Irzal, Irzal; Pebrian, Pebrian
Teknomekanik Vol. 1 No. 1 (2018): Regular Issue
Publisher : Universitas Negeri Padang

Welding can be interpreted by the process of joining two metals to the molten metal point. Metal low carbon steel which is easily processed by welding techniques. Strong setting of the welding current will affect the weld. If the current used is too low it will cause the difficulty of igniting the electric arc. Conversely, if the welding current is too high, the electrode will melt too fast. The welding current strength 130A corresponds to the diameter of the 3.2 mm electrode. The purpose of the research was to determine whether or not the influence of welding current on the low carbon steel hardness of SMAW welding results with E7018 electrode. This type of research was carried out by the type of experimental research, the research process was carried out by hardness testing, and the data obtained through the results of hardness testing was followed by observation and analysis of specimens of low carbon steel ST 37 welded by SMAW with different current strength using E-7018 electrode. Low carbon steel specimens from SMAW welding with 130 A welding current using E-7018 electrode have a higher hardness value compared to low carbon steel specimens produced by SMAW with welding current strengths of 100A and 160A using E-7018 electrodes.

Comparison of Accuracy in Cutting Dental Profiles Between Differential Methods Approach Upward with a Lower Approach to Making Straight Gear Wheels Agustian, Ganda; A, Yufrizal; Irzal, Irzal
Teknomekanik Vol. 1 No. 2 (2018): Regular Issue
Publisher : Universitas Negeri Padang

In the world of industrial gear use, it cannot be denied, every machine in the industrial world uses a component, namely gears to move rotating power. For this reason, in making gears the precision of the gear profile must be considered. The purpose of this study is to compare the accuracy of cutting the dental profile between the approach differential method and the approach to the bottom. This research is an experimental research. Based on the results of data analysis on the comparison of the precision of cutting dental profiles between the approach differential methods and the approach to the bottom, the upward approach is more appropriate in terms of thickness and number of teeth. The number of samples used in the study of 12 gears consisting of 6 gears was carried out with the approach differential approach method, and 6 gears were carried out by the differential approach approach method. Each sample is measured in thickness and the number of teeth in a straight gear. After measurement, the data is processed using the t-test formula to see the significant difference in the accuracy of the dental profile. Based on the results of the t-test analysis that has been carried out there are differences in the gears produced. The approach to differential approach to getting better gear results.

Numerical Analysis of Fluid Flow on Cross Flow and Kaplan Turbine Prototype Purwantono, Purwantono; Sidiq, Ahmad Halim; Irzal, Irzal; Refdinal, Refdinal
Teknomekanik Vol. 1 No. 2 (2018): Regular Issue
Publisher : Universitas Negeri Padang

Based on previous research conducted by Purwantono about the utilization of exhaust flow from a conventional cross-flow turbine prototype that was used as an inlet of tubin Kaplan [1]. This research was carried out to see how the exhaust flow velocity of each tubin before and after was combined into one combination turbine. This numerical based study uses the Ansys 18.0 application by inputting a 3D design from a conventional turbine prototype which was used as the material for this study. The results obtained in this study show the average of outlet velocity in the Kaplan turbine that uses a velocity outlet from a cross flow turbine of 0.3 m / s greater when it is combined, which is 8.33 m / s and after being combined to 0.38 m / s. The results of this study are expected to contribute to the development of conventional turbines later

Making Print Tool Gambir Sap Parallel Slinder System Jasman, Jasman; Erizon, Nelvi; Irzal, Irzal; Ardi, Junil
Teknomekanik Vol. 2 No. 2 (2019): Regular Issue
Publisher : Universitas Negeri Padang

The problems that exist in the former group are the process of knowing the results of processing gambir sap is still done manually. To print 20 kg of gambier sap, it takes about 5 to 8 hours. Through this service activity, the team wanted to overcome the problem by providing a sap gambir. The purpose of implementing this service activity is to provide a solution to the problems faced by gambier farmers in the process of printing sap gambir. The method of applying science and technology carried out in this activity is to provide introductory theories, demonstrations, and practices. The introductory theory is applicable, namely the introduction of tools, how to use them, their functions and application applications in the field. The realization of the service to the community of Kenagarian Lampanjang Sutera Pesisir Selatan Subdistrict was held on October 6, 2018. The tool that was handed over to the community of Kenagarian Lampanjang Kecamatan Sutera was a unit of a parallel cylinder printer. Application of appropriate technology that is applied to processing gambir leaves must be adjusted to the productivity of printed sap gambir. The amount of gambir sap obtained by gambir farmers will adjust the capacity of the gambir sap. The tool devoted to the community has cylindrical media made with wood media with a thickness of 70 m. The mould cylinder will print the sap of gambir according to the size sold on the market and have a gum pushing media from the mould which serves to release the sap that is in the cylinder mould. This driving media is also made using wood.

Numerical analysis of flow characteristics of the oil-water mixture in stratified-annular horizontal pipe Erizon, Nelvi; Jasman, Jasman; Irzal, Irzal; Aldio, Muhammad Fikhri; Saputra, Aprizal; Tin, Chau Trung
Teknomekanik Vol. 5 No. 2 (2022): Regular Issue
Publisher : Universitas Negeri Padang

The loss of oil fluid flow in the piping system in the petroleum industry due to friction is the cause of low efficiency. To reduce friction loss, the viscosity of petroleum can be lowered by adding water as a mixture. Actually, the flow loss in a piping system is influenced by several factors including flow pattern, fluid type, flow velocity, flow pressure and pipe diameter. This study aims to determine the effect of flow patterns on changes in velocity in the two-phase flow of oil and water in a piping system. This numerical analysis research was carried out using Fluent 6.2 software with variations in the velocity of the oil-water mixture: 0.2, 0.4 and 0.6 m/s. The simulation results show that the greatest pressure loss occurs at a fluid velocity of 0.6 m/s where the flow is stratified mixed. While the smallest pressure loss at a mixture velocity of 0.2 m/s when the flow is stratified smooth. From the results of the study, it can be concluded that the increase in fluid flow velocity has a positive correlation with the increase in the value of flow losses in the pipe.

Enhanced durability and tribological performance of polyvinyl alcohol/layered double hydroxide/tannic acid composites under repeated swelling cycles Rahmadiawan, Dieter; Shi, Shih-Chen; Zhuang, Wei-Ting; Indrawan, Eko; Fernanda, Yolli; Syahri, Budi; Irzal, Irzal
Teknomekanik Vol. 7 No. 2 (2024): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v7i2.32872

In recent years, the exploration of polyvinyl alcohol (PVA) composites has garnered significant attention due to their versatility applications in aqueous environments. However, despite their promise, neat PVA exhibit limitations such as significant mechanical degradation under repeated swelling cycles. This study investigates the durability and tribological performance of polyvinyl alcohol (PVA) composites reinforced with nickel-iron layered double hydroxide (LDH) and tannic acid (TA) under repeated swelling cycles. Building on previous research that explored composite preparation and initial characterization, this research emphasizes the effects of cyclic swelling on wear resistance, friction behavior, and mechanical properties. Tribological tests were conducted to evaluate the coefficient of friction (COF) and wear rate before and after multiple swelling cycles, alongside tensile strength and strain measurements. The results revealed that the PVA/TA2/LDH2 composite, containing the highest additive content, exhibited the lowest wear rate of 11.52 × 10⁻⁵ mm³/Nm after 3 swelling cycles, demonstrating superior resistance to material degradation. Although PVA/TA2/LDH1 exhibited a slightly lower COF, its wear rate was higher due to reduced reinforcement. Compared to neat PVA, which showed a COF increase from 0.45 to 0.53, the PVA/LDH/TA composites retained their tribological stability, with only a marginal increase in COF and wear rate. Similarly, tensile strength of PVA/TA2/LDH2 decreased by only 11% after 3 cycles (from 33.3 MPa to 30 MPa), while neat PVA experienced a 25.5% reduction (from 30 MPa to 22.5 MPa). These findings highlight the potential of PVA/LDH/TA composites for applications in aqueous environments, offering significantly enhanced long-term performance and reliability.

Optimizing vertical-axis wind turbine designs: A comparative CFD analysis of savonius, darrieus, and savonius-darrieus configurations Erizon, Nelvi; Refdinal, Refdinal; Jasman, Jasman; Irzal, Irzal; A, Yufrizal; Fahrezi, Muhammad Shadiq; Fernanda, Firza; Fadillah, Egi; Pepito, Ma Leona Maye B.
Teknomekanik Vol. 8 No. 2 (2025): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v8i2.33172

This study aims to evaluate the performance of vertical-axis wind turbines (VAWTs) with three different configurations, including Savonius, Darrieus, and a Savonius-Darrieus hybrid wind turbine, using Computational Fluid Dynamics (CFD) simulations. The methodology involves 3D geometry modeling, simulation parameter setup, meshing, and post-simulation analysis using SolidWorks 2022 software. The simulation results indicate that the Savonius turbine achieves the highest power coefficient (Cp) and torque coefficient (Ct) among the three designs, with a maximum Cp value of 0.5 at a Tip-Speed Ratio (TSR) of 0.4. Conversely, the hybrid turbine demonstrates lower efficiency, although it theoretically offers potential for improving performance at low wind speeds. Pressure and flow velocity distributions reveal that the Savonius turbine maintains the most stable pressure pattern compared to the other configurations. These findings highlight the potential of the Savonius turbine as a small-scale renewable energy solution, particularly in urban areas with low wind speeds. Further research is recommended to optimize hybrid turbine designs using machine learning approaches and empirical validation through field experiments to support the achievement of Sustainable Development Goals (SDGs), particularly Goal 7, affordable and clean energy.

Co-Authors A, Yufrizal Agustian, Ganda Aldio, Muhammad Fikhri Ambiyar, Ambiyar Andre Kurniawan Arafat, Andril Ardi, Junil Aspar, Fathir Ayusran, Reyvanda Budi Syahri Bulkia Rahim Caniago, Yusuf Dori Yuvenda Eko Indrawan Erizon, Nelvi Fadillah, Egi Fahrezi, Muhammad Shadiq Fajri, Husnul Fajrin, M Fauza, Anna Niska Febri Prasetya Fernanda, Firza Fernandes, Erik Fikri, Ikhsanul Firdaus, Afzanul Fitra, Dinul Fitrah Qalbina Habibie Habibie Hardi, Fidel Apria Ismail, Havis Jasman Jasman Junil Adri Kelvin Permana Saputra, Dwi Khairul, Farid Lili Dasa Putri Maryonda, Andre Milana Milana Nabawi, Rahmat Aziz Nurdin Hendri Nurmahmudi, Nurmahmudi Pebrian, Pebrian Pepito, Ma Leona Maye B. Prabulingga, Reza Ramadhan Primawati Primawati, Primawati Purwantono, Purwantono Putra, Setrihan Rahmadiawan, Dieter Ramadan, Ryan Ramadhan, Qadri Refdinal, Refdinal Remon Lapisa Rifelino Rifelino Saputra, Aprizal Saputra, Muhammad Pandi Shi, Shih-Chen Sidiq, Ahmad Halim sudiani, yoni Syahril Syahril Syaputra, Ardiansyah Tin, Chau Trung Wanda Afnison Waskito Waskito, Waskito Wulansari, Rizky Ema Yolli Fernanda Yufrizal Yufrizal, Yufrizal Zainal Abadi Zaus, Anggi Agni Zhuang, Wei-Ting

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