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Jasman Jasman

FKIP UNTAD

Author-ID : 291520

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Veterinary Other

Published : 124 Documents Claim Missing Document

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Articles

Title

Effect of Cooling Media on Steel Hardness ST 37 On Conventional Lathe Process Erizon, Nelvi; Ardiyansyah, M Iksan; Jasman, Jasman; A, Yufrizal
Teknomekanik Vol. 1 No. 1 (2018): Regular Issue
Publisher : Universitas Negeri Padang

This study aims to determine the type of air cooling media, soluble oil, and air to the result on lathe ST 37 steel. The cooling medium is very important to maintain boring tool deformation and can add product quality. In the process lathe of friction between the workpiece and chisel cut that can produce overheating and influence on the result of the slice boring tool on the workpiece. The research that will be carried out is experimental research with variables that are controlled that is feeding, deep of a cut, and spindle rotation and examination of the hardness of the specimen on the object before done lathe. The sample in this study which is ST 37 steel with diameter 25 mm and length 60 mm as many as 9 specimens which will be done lathe with different type media kind inprocess working. To know influence the type of cooling medium against steel ST 37 is done brinnel hardeness test using test equipment hardness tester. Of the 9 specimens lathe will be determined 3 points to do hardeness tests. From the result of hardness test and analysis obtained from hardness test on steel ST 37 average data that is use of soluble refrigerant media that produce a very good cooling at the time of the lathe process. The results of research is obtained that the use of soluble refrigerant media is the best with an average hardness of 224.10 kg / mm². On the lathe process, the cooling media has oil content will be able to maintain the scores hardness and time-worn on boring tool. Thus to maintain the hardness values can be used soluble oil cooling media and to increase the hardness values of workpieces can be used air cooling media.

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.

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.

Manufacture of Gambir Leaf Press Impac System in Efforts to Increase Productivity of Gambir Farmers Erizon, Nelvi; Jasman, Jasman; syahrul, syahrul; Wakhinuddin, Wakhinuddin
Teknomekanik Vol. 2 No. 2 (2019): Regular Issue
Publisher : Universitas Negeri Padang

The Hipgampra farmer group has Gambir farming land. The problems that occur in this farmer group have not had a press tool, usually, this farmer group rents gambir leaf processing equipment privately and must pay rent wages which are worth one-third of the proceeds of the sale. Through this service activity, the team wanted to overcome the problem by giving a press tool to process gambir leaves. The purpose of the implementation of this service activity is to provide a solution to the problems faced by gambier women in the process of pressing gambier leaves. 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 service to the community of Kenagarian Lampanjang Sutera Pesisir Selatan Subdistrict was held on October 6, 2018. The equipment that was handed over to the community of Kenagarian Lampanjang Subdistrict, Sutera in the form of a unit of a Gambir leaf impact system. Application of appropriate technology that is applied to gambir leaf processing must be adjusted to the productivity of harvested gambier leaves. The number of gambir leaves that can be harvested by gambier farmers will adjust the capacity of the gambir leaf press to be processed. The tool that is devoted to the community has a forging foundation that functions as a place for gambir leaves to be pressed and has a jack stand that will press the gambir leaves to the foundation so that the sap of gambier will come out.

Performance test of Pikohidro Cross flow Water Turbine using multilevel double penstock Purwantono, Purwantono; Amin, Bahrul; Aziz, Abdul; Jasman, Jasman; Kurniawan, Andre
Teknomekanik Vol. 2 No. 2 (2019): Regular Issue
Publisher : Universitas Negeri Padang

This study aims to examine the performance of pico hydro scale cross flow water turbines using multilevel double penstock as a conductor of water flow. Multilevel double penstock is used to reduce the transportation process from highways that are affordable to four-wheeled vehicles / cars to the location of the installation of the turbine. This condition causes the need for small-scale water turbine designs with lightweight construction with a kock down system. Overall the picohidro scale turbine construction is needed relatively cheaper transportation costs, so that people who have not been reached by the PLN network can be touched by small and cheap electricity. Turbine construction data has a runner diameter of 170 mm, body dimensions 200 mm x 300 mm x 250 mm, frame 250 mm x 800 mm. Pool tando 600 mm x 1200 mm and penstock length 16m. The power produced is theoretically around 2500 watts, with a data flow of 50 liters / second and a water level of 8 m. 65% efficiency. The research method is analyzing the double penstock water flow, by making paralon pipes in stages, ranging from 5 incci diameter, 4 inches and 3 inches, flow analysis approach using a gradient line, where the incoming water velocity and water velocity come out until entering the transmitting pipe. The performance results of this turbine provide an average actual power of up to 2000 watts. The stability of the inlet water condition is used by the Tando pond as a water bath. If there is excess water in the sediment tank, the water gate is used out, where excess water will automatically flow into the exhaust channel.

The Variation Effect of Electric Current Toward Tensile Strength on Low Carbon Steel Welding with Electrode E7018 Pratomo, Muhammad Agung; Jasman, Jasman; Erizon, Nelvi; Fernanda, Yolli
Teknomekanik Vol. 3 No. 1 (2020): Regular Issue
Publisher : Universitas Negeri Padang

The strength of the welding result is strongly influenced by several factors, one of which is the selection of high current. This study aims to determine the effect of high current of welding on the strength of low carbon steel welding joints. The process of welding the material uses the open V seam connection type. The variations of the high current used were 80 A, 100 A and 130 A. The specimen used was a carbon steel plate with code of 1.0038 with thickness of 8 mm and the electrode used was the E7018 electrode with diameter of 3.2 mm. The strength of the welding results is influenced by arc voltage, amount of current, welding speed, amount of penetration and electric polarity. Determination of the amount of current in metal joints using arc welding affects the work efficiency and welding materials. Based on the research, it was found that welding using high current of 100 ampere produced the highest tensile strength value of all test specimens that were given welding treatment and good penetration results.

The Effect of Cooling Media on Tensile Strength of Medium Carbon Steel in Post Welding Process Using Electric Welding (SMAW) with E7018 Electrodes Zulhafril, Herman; Jasman, Jasman; Tespoer, Kimberly June
Teknomekanik Vol. 3 No. 2 (2020): Regular Issue
Publisher : Universitas Negeri Padang

The use of cooling media in post welding process will affect the tensile strength of a material. This study aims to determine how much the influence of using cooling media in post welding and which cooling media is appropriate to use. The process is done by comparing the tensile strength of each cooling media, namely the cooling media of water, air, and coolant. The use of cooling media is carried out after the welding process, until the material that is ready to be welded reaches room temperature. Based on the experiments that have been conducted, the use of post-welding cooling media affects the tensile strength of medium carbon steel with the highest effect on the water cooling media, then the coolant media, and the lowest is the air cooling media. Therefore, the choice of the use of cooling media significantly affects the tensile strength of medium carbon steel in the post-welding process.

The Optimization of Building Energy Consumption in Universitas Negeri Padang Using Building Energy Simulation Program Kurniawan, Andre; Qosim, Nanang; Lapisa, Remon; Abadi, Zainal; Jasman, Jasman
Teknomekanik Vol. 4 No. 1 (2021): Regular Issue
Publisher : Universitas Negeri Padang

Energy consumption of a building is one of the biggest sources of energy use today. Green Building Comitte Indonesia (GBCI) has launched a concept of energy consumption saving in a nationally standard building. Audit Building energy audit is the way to know how actual building energy consumption is and find alternative solution to decrease energy consumption in order to fulfill the energy saving building criteria. Two types of HVAC systems will be run in the EnergyPlus simulation, split AC and central AC. The previous research proved that central AC is better than split AC system for energy saving in the building with 20 floors. The simulation results show that by using a certain energy system, a more efficient energy system will be achieved and can still maintain the comfort of the room at a temperature of 24 °C and relative humidity according to the Green Building Indonesia standard reference.

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.

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 - Hwihanus A, Yufrizal Abd. Rasyid Syamsuri Abdul Aziz Abdul Gani, Kamal Abyan, Sayyid Achmad, Ashfa Adnan Adnan Adnan, Adnan Adnan Adris Ade Putra Agustina Ahmad Hamid, Ahmad Ahmad, Ramadan M. Aldio, Muhammad Fikhri Alkadri Alkadri Ambiyar, Ambiyar Amelia, Armita Aminuyati Andre Kurniawan Andriani , Cici Andriansyah Andriansyah Anwar, Hindi Arafat, Andril Ardi, Junil Ardiyansyah, M Iksan Arifin, Muh. Aripin, Septian Arisandi, Duddy Arjuna, Arjuna Arman Arman Arwizet Arwizet, Arwizet Asmauna, Azis Aspar, Fathir Asrul Asrul Aswar Aswar Azis, Rudi Bahrul Amin Baital, Muhammad Syarif Bakty, Andi Fatimah Maoudy A Batubara, Ummi Khairani Bayu Adi Nugroho, Bayu Adi Beda, Yosep Budi Syahri Bulkia Rahim Cahyani, Roro Candhy, Mamarasi Chandra, Shandika Cici Andriani Darwin P. Lubis, Darwin Desmaniar, Rani Dini Onasis Djami, Leopold Alexander Djara, Apriana Duka, Risman S. Edy Suprapto Effendi, Marwan Eko Indrawan Eko Susanto Elne Vieke Rambi Erizon, Nelvi Erna Dewita Fadil Maiseptian Fadillah, Egi Fadly, Imam Fahrezi, Muhammad Shadiq Fahrizal Fahrizal Fangky Antoneus Sorongan Febri Prasetya Fernanda, Firza Fiki Efendi Fikri, Ikhsanul Gafar, Muammar Saidul Hafifurrezy, M. Hakzah Hamarung, Mukhlis Amin Hamka Hamka, Hamka Hamsu Hanafi, Hamsu Hamsyah, Hamsyah Handa, Muhamad Idham Harman Harman, Harman Haron, Rosmawati Hasanuddin Hasanuddin Hasbullah Hasddin, Hasddin Haydir, Haydir Hazriani, Hazriani Hedwigis Esti Riwayati inda, nur Indrawan , Eko Irfai, Irfai Irzal, Irzal Ismail, Havis istiqomah istiqomah Itu, Katrina Joy Victor Imanuel Sambuaga Judijanto, Loso Juliana, Andi Junil Adri Jusran, Mokoginta K, Basri Kabuhung, Anselmus Kaco, Suardi Kamarudin, Moh Khairul Amri Kasim, Hasdi Syahid Kasimir Sarifudin Kasmaida kasmaida Katiandagho, Dismo Khasanah, Ainun Uswatul La Karimuna Lake, Darius V. Lalangpuling, Indra Elisabet Landang, Florida Lapoliwa, Desi Kritiani Lawa, Yosep Lestari, Yola Limahelu, Ferdinand Alberth Loleh, Adrianus Mahaswari, Ni Nyoman Dechinta Dwi Mahyudin, Dedi Malik, Syaefulloh Maulana Manesi, Damianus Mardi, Feldia Markonah, Markonah Masri Ridwan, Masri Menungsa, Abdul Sarlan Meyok, Greiviany Yunaika Mizkazola, Indri Moh Sabran Sabran Mudinillah, Adam Muhammad Ali Makaminan, Muhammad Ali Muhammad Iqbal Muhammad Risal, Muhammad Muhammad Rusdi Muis B, Abd Muis B, Abd. Mujur, Raftly M. Mukaddas, Jamal Murisal Murisal Musawantoro, Muhammad Mustakim Mustakim Muzaki, Saepul Nabila Tasrif Nanang Qosim Nasrul Edi Santoso Nawir T, Muh Ningsih, Jusmita Nofri Helmi, Nofri Noveliza, Felia Nuraeni, Vira Nurfajri Nurfajri, Nurfajri Nurhasanah Nurhasanah Othman, Akmal Aini Parera, Lolita A. M. Pascoal, Kevin G. Pebrian, Pebrian Pepito, Ma Leona Maye B. Pratama, Heru Pratama, Raymon Pratomo, Muhammad Agung Primawati , Primawati Primawati Primawati, Primawati Priyono Priyono Purwantono, Purwantono Purwitasari, Paramitha Putra, Rahmat Mardiansyah Putra, Randi Purnama Putrarianda, Mexi Quick Calvin, Iqbal DN Rahmat Hidayat Ramadhan, Fanny Fadillah Refdinal, Refdinal Remon Lapisa Retnaningsih, Inung Wijayanti Ridarmelli Ridarmelli Ridawan, Masri Rizal Indra Tjahya Rizal Mawardi Rokot, Agus Roma, Asri Nova Ronny Ronny safinah, safna Safitri Maladeni, Eva Salasiah A, Salasiah A SALASIAH SALASIAH, SALASIAH Sambari, Villa Evadelvia Ginal Sambuaga, Joy V. I. Sangadjisowohy, Idayani Sanning, Sanning Saputra, Aprizal Saputra, Dimas Aulia Semuel Layuk Septiawisda, Maya Shiddiq, Abdul Rahim Simatupang, Minson Sirama, Sirama Sri Rizki Putri Primandari Suari, Muhammad Rahmadi sudiani, yoni Sudirman Sudirman Suharyanto Sukmajaya, Fajar Suleman, Rahman Sunati, Nurmila Suwarja, Suwarja Syahruddin Syahruddin Syahrul Syahrul SYAMSU ALAM Syaputra, Afzan Tasrif , Nabila Taufik Taufik Taufik Taufiq Akbar Tespoer, Kimberly June Thaheransyah Tin, Chau Trung Tomia, Sumiati Tonjaya, I Gede Trihatmoko, Huda Tumbol, Michael V.L. Tupail, Fharhan Utami, Eva Yuniarti Wa Ode Sifatu Wahyuni, Sherly Wakhinuddin Wakhinuddin, Wakhinuddin Waskito Waskito, Waskito Widarto, Hendro Wildy, Fadhlan Wulansari, Rizky Ema Yantony, Didit Yolli Fernanda Yufrizal Yufrizal, Yufrizal Yusuf, Muh. Wahyu Yuyun, Yuyun Zainal Abadi Zarabiyu, Nastya Chila Zulhafril, Herman Zuwirda, Zuwirda

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