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All Journal CIVED (Journal of Civil Engineering and Vocational Education) Mechanical Engineering Education Journal Sainstek JURNAL PENDIDIKAN TAMBUSAI Eksakta : Berkala Ilmiah Bidang MIPA Jurnal Fokus Elektroda : Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali Journal of Applied Engineering and Technological Science (JAETS) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Teknomekanik Fokus Elektroda: Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali) Jurnal Vokasi Mekanika MASALIQ: Jurnal Pendidikan dan Sains Fleksibel: Jurnal Pengabdian Kepada Masyarakat Journal of Engineering Researcher and Lecturer Journal of Innovative and Creativity IJIMCE : International Journal of Innovation in Mechanical Construction and Energy Journal of Civil Engineering and Vocational Education Mars: Jurnal Teknik Mesin, Industri, Elektro dan Ilmu Komputer
Yolli Fernanda
Universitas Negeri Padang
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy 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 Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Transportation Other

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MINAT MAHASISWA PRODI S1 PENDIDIKAN TEKNIK MESIN UNIVERSITAS NEGERI PADANG TERHADAP PEKERJAAN PROFESI GURU VOKASI Ramadhan, Fadli; Syahri, Budi; Fernanda, Yolli; Prasetya, Febri
Jurnal Vokasi Mekanika (VoMek) Vol 6 No 4 (2024): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v6i4.788

Abstract

In the era of globalisation, education plays an important role in creating a prosperous society. Teachers have a crucial role in improving the quality of education in Indonesia. Interest in becoming a teacher is a condition in which a person has great attention to the teaching profession, feels happy, and wants to become a teacher. This study aims to identify the interest of undergraduate Mechanical Engineering Education Study Programme students in choosing a profession as a teacher. Based on observations and interviews with students of the Mechanical Engineering Education Study Programme, Faculty of Engineering, Padang State University, it is known that many students are not interested in becoming teachers. Some of the reasons underlying this include lack of self-confidence, doubts about income, opportunities to become a teacher, and personal ability to deal with student characteristics. This study aims to determine the description of interest in becoming a teacher in Mechanical Engineering Education Study Programme students at Padang State University. The research method used is descriptive with a quantitative approach, with a sample of 25% of the population or 43 people. The results showed that the interest of Mechanical Engineering Education Study Programme students at Padang State University towards the vocational teaching profession reached 81.36%, which is included in the good category. In conclusion, students of Mechanical Engineering Education Study Programme at Padang State University have a good interest in becoming a teacher.
Studi Eksperimental Penggunaan Solar Collector dalam Pengeringan Ikan Menggunakan Media Pasir Al Rahman, Muhammad Fadil; Fernanda, Yolli; Primawati, Primawati; Kurniawan, Andre
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 1 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i1.802

Abstract

Fish drying using a solar collector with heat storage is hot air taken directly from solar energy channeled into the solar collector which can store heat energy from the sun with sand media in the solar collector. The research method involves drying fish at different temperature and time variations, and comparing the results with conventional drying methods. The parameters measured include the moisture content and the dried fish produced. In addition, the dried fish produced from this process had better texture and flavor, thus improving the quality of the final product. The purpose of this research is to dry fish using a solar collector by using solar energy media to absorb heat energy. The test results of the fish dryer using sand media showed the highest temperature on the inside of the oven with a temperature of 41 ° C at 11:00 WIB with a solar intensity of 499 W/m². Drying on fish occurs a reduction in fish content, namely 49.25% to 64.70% for 8 hours of drying using a solar collector. The drying rate of the fish drying process is 0.091 g/min to 0.061 g/min with a collector efficiency level of 15.04% on the first day of testing and 16.52% on the second day of testing. In the process of drying fish for two days, there is a reduction in fish mass from 67 grams to 12 grams with a mass reduction of about 55 grams.
Analisa Alat Pengering Ikan Solar Kolektor Dengan Media Penyimpan Panas Batu Spli Faisal, Afdal; Fernanda, Yolli; K, Arwizet; Primawati, Primawati
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 1 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i1.807

Abstract

The use of solar energy as an alternative energy source has developed significantly in various applications. The fish dryer in this study utilizes solar energy, assisted by a solar collector, which uses split stones as a heat storage medium. The aim of this research is to enhance the usage of the solar collector fish dryer because it can be used when there is insufficient solar energy. The research method includes the design and creation of a dryer prototype, as well as measuring the temperature of incoming and outgoing air, including the relative humidity inside the drying chamber. The results revealed that utilizing split stones as a heat storage medium can maintain the air temperature in the drying chamber at an optimal level for a longer period, even with varying sunlight intensity. This research was conducted at the Mechanical Engineering Laboratory of Universitas Negeri Padang. The highest temperature achieved in the solar collector fish dryer with a heat storage medium in the oven or drying chamber was 40°C at 13:00 WIB, with a solar intensity of 503 W/m². The drying process of salted fish using split stones as a heat storage medium resulted in a moisture evaporation rate of 49.25% - 64.7% over 8 hours, with a drying rate of 0.068 g/m - 0.079 g/m. The collector's efficiency was 16.6% on the first day and 16.48% on the second day of testing.
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

Abstract

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.
Analisa Penggunaan Bahan Bakar Pellet Kayu pada Tungku Biomassa Agustian, Rizki; Fernanda, Yolli; K, Arwizet; Kurniawan, Andre
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 1 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i1.827

Abstract

Along with population growth and global industrialization, the level of fossil fuel use continues to increase. If fuel consumption continues to increase without proper maintenance, the fuel oil (BBM) crisis will become an unavoidable problem. Utilizing biomass as a source of energy is profitable because theoretically it does not produce the greenhouse gas CO2 which is detrimental to the environment. However, conventional biomass stoves still face problems related to exhaust emissions and combustion efficiency. This study's objective is to make a biomass stove that can reduce exhaust emissions to increase combustion efficiency, thus supporting the use of environmentally friendly energy. The method usually used is by changing the mass of wood pellets during boiling water into the combustion chamber. The weight ranges between 300 grams, 400 grams, 500 grams, 600 grams and 1400 grams, each according to the capacity of the combustion chamber. The five types of tests aim to determine the extent to which differences in wood pellet mass and biomass stove type have on the combustion process, as well as how long the process takes. The findings of the study show that variations in the mass of wood pellets greatly influence the boiling time of water, with a mass of 300 grams the boiling time has not yet reached the boiling point of the water, with a mass of 400 grams it gets 23 minutes, with a mass of 500 grams it gets 25 minutes, with a mass 600 grams can be obtained in 26 minutes
Analisis Kandungan Energi Syngas dari Gasifikasi Biomassa Sampah Pasar Menggunakan Metode Uji Boilling Test Azis, Ismail; Fernanda, Yolli; Refdinal, Refdinal; Yuvenda, Dori
Jurnal Pendidikan Tambusai Vol. 9 No. 1 (2025)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i1.25423

Abstract

Kebutuhan energi di Indonesia terus meningkat seiring dengan pertumbuhan populasi penduduk dan perkembangan industri, sedangkan suplai energi mulai menipis. Akibatnya ketersediaan energi menjadi langka. Biomassa sebagai enegi terbarukan memberikan solusi yang efektif untuk menghasilkan energi. Penelitian ini melakukan pengujian untuk mengetahui peforma dan kinerja gasifikasi dengan empat jenis variasi bahan bakar berbasis biomassa antara lain pellet kayu 100%, campuran pellet sampah pasar dan pellet kayu dengan perbandingan volume 1:1, campuran pellet sampah pasar dan pellet kayu 2:1, serta pellet sampah pasar 100% menggunakan alat downdraf gasifier. Metode penelitian ini merupakan uji eksperimental karena melibatkan pengujian langsung untuk mengukur temperatur gasifikasi, waktu gasifikasi, nyala api efektif,serta suhu air yang dipanaskan menggunakan uji titik didih/ boilling test. Hasilnya menunjukkan bahwa pellet kayu memberikan kinerja terbaik dalam hal stabilitas pembakaran, rendeman syngas, dan menghasilkan nilai kalor yang tinggi dengan waktu nyala api efektif selama 85 menit. Campuran pellet kayu dan pellet sampah pasar 1:1 menghasilkan syngas dengan nyala api efektif selama 15 menit. Sedangkan campuran pellet sampah pasar dan pellet kayu dengan perbandingan volume 2:1 menghasilkan syngas dengan waktu nyala api efektif selama 25 menit. Sementara itu, pellet sampah pasar memberikan peluang untuk memanfaatkan limbah pasar menjadi energi walaupun menghasil syngas dan nilai kalor yang rendah, tercatat waktu gasifikasi selama 25 menit namun, tidak efektif dalam menyalakan api. Selain itu campuran bahan bakar yang lain perlu dikaji untuk menawarkan potensi untuk menghasilkan energi yang relevan demi keberlanjutan lingkungan hidup.
Analisis Aerodinamika Rancangan Body City Car dengan Penambahan Spoiler Belakang Menggunakan Ansys Fluent Ananda, Yoga Rizki; Putra, Randi Purnama; Fernanda, Yolli; Qalbina, Fitrah
MASALIQ Vol 5 No 2 (2025): MARET
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i2.4976

Abstract

An increase in the number of fossil fuel vehicles leads to increased energy consumption and exhaust emissions, which have a negative impact on the environment. One way to improve fuel efficiency is to optimize vehicle aerodynamic design, especially through the addition of a rear spoiler. This study aims to analyze the effect of city car body design with the addition of a rear spoiler on vehicle aerodynamic characteristics, such as drag coefficient, lift coefficient, and the ratio between the two. The research method used is numerical simulation with Computational Fluid Dynamics (CFD) using Ansys Fluent 2024 R1 Student Version software. The simulation was performed on a 3D city car model with airflow velocity variations of 10 m/s, 20 m/s, and 30 m/s. The data obtained were analyzed using grid independency analysis techniques to ensure the accuracy of the simulation results. The results show that the addition of a rear spoiler is able to reduce the lift coefficient thereby improving vehicle stability, although there is a slight increase in the drag coefficient as the airflow velocity increases. The negative ratio between the lift coefficient and drag coefficient indicates that the lift is downforce, which contributes to vehicle stability at high speeds. A suggestion from this research is the optimization of the spoiler shape to further reduce the drag coefficient without compromising vehicle stability. Further research can be conducted by testing variations in spoiler design and lighter materials for better aerodynamic efficiency.
Calorific Value of Palm Kernel Shell Charcoal (PKSC) Briquette as Solid Fuel Hendri Nurdin; Waskito Waskito; Fadhilah Fadhilah; Toto Sugiarto; Andre Kurniawan; Yolli Fernanda; Rudy Anarta; Fathi Aulia DZ
Journal of Applied Engineering and Technological Science (JAETS) Vol. 6 No. 2 (2025): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/jaets.v6i2.6336

Abstract

The need and utilization of energy in society exceed available production. This condition requires acceleration and efforts to find solutions through the diversification of palm shell biomass into solid fuel briquettes. Palm shells have the potential as biomass and renewable energy sources that are selected based on strategic, technical, and environmental considerations. Its utilization so far has only been burned directly which causes air pollution or used as road paving in oil palm plantations. The environmental impact is the accumulation of solid waste, and global warming in the Crude Palm Oil processing industry. The research objective was to obtain the calorific value of palm kernel shell briquettes with carbonization process. The experimental research method carried out by innovating palm kernel shell briquette raw materials at various percentage variances (90%: 10%, 85%: 15%, 80%: 20%, 75%: 25%) using tapioca adhesive. The technical parameters of briquettes making are molding pressure of 10 MPa, particle grains of 60 mesh, carbonization temperature of 400oC; 450oC; 500oC with a holding time of 1 hour. From this study, the calorific value of palm kernel shell charcoal (PKSC) briquettes at a concentration of 85%;15% at a temperature of 400oC was 25.86 MJ/kg with tapioca adhesives as the highest calorific value parameters. The technology used to make palm kernel shell charcoal briquettes is a potential development that can be recommended as a precursor to solid fuels. The impact of developing PKSC biomass energy briquettes is an innovation in utilizing waste to create solid fuels. The implications of this research can be applied by home industries or households. This research is a contribution to solutions in overcoming energy needs and deficiencies as a form of sustainable energy..
Effect of Hydrophobic Surface on Thermoelectric Cooling-Based Atmospheric Water Generator Irfan, Abdillah; Kurniawan, Andre; K, Arwizet; Fernanda, Yolli
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 2 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i2.843

Abstract

Water has a very important role in everyday life. Apart from humans, other living things also depend on water to survive. But there are still many areas in the world even in Indonesia still experiencing drought or clean water crisis. Therefore, new innovations are needed in producing water. One of the innovations is the atmospheric water generator (AWG) which utilizes the formation of water from air or condensation. The AWG in this research uses thermoelectricity as a cold source. Where thermoelectricity is less noisy, easy to obtain and assemble into a system, has a long service life without requiring maintenance. But thermoelectrics have disadvantages where cooling on thermoelectrics is less efficient. So to overcome this, I as the author use a hydrophobic surface as a condensation surface where it can accelerate condensation and increase the amount of water produced. In this study to see the comparison, tests were carried out using various types and surface areas.
Solar Home System Plant Menggunakan Gabungan Dari DVD dan Solar Panel Prasetya, Kresna Adi; K, Arwizet; Fernanda, Yolli; Kurniawan, Andre
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 2 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i2.860

Abstract

Indonesia is a tropical country that has great potential for harnessing and managing solar energy. At present, the technology of converting solar energy into electrical energy such as solar cells still has weaknesses in terms of cost. Therefore, this study aims to test the potential of solar energy by creating a solar home system plant using DVD and Zener diode. This solar home system plant using DVD has the advantage of using low cost and the power generated can be said to be sufficient. In addition, this product can be used as a substitute for solar cells if properly applied. This study uses an experimental method in a quantitative approach. In this study, the independent variable is the structure of the solar panel while the dependent variable is the amount of energy read by the voltmeter. This study uses the photoelectric principle. Where photoelectricity is an electron released from the surface of an object exposed to light. This study was carried out by looking at how much power could be generated by DVD and Zener diode. The results showed that DVD and Zener diode can generate electrical energy, but the results are still too small and a large number of DVDs are needed to generate more energy. So it can be concluded that DVD still cannot replace solar panels, but can be used as a tool to maintain the stability of solar panels.
Co-Authors A, Yufrizal Abdu Idham Adam Mandra Suwandi Agustian, Rizki Ahmed, Shabir Akbar, Arifki Akhmad Rais Al Rahman, Muhammad Fadil Albasyit, Muhammad Ravi Ambiyar, Ambiyar Aminuyati Ananda, Yoga Rizki Andika Putra ANDIKA SAPUTRA Andre Kurniawan Andre Kurniawan Andre Kurniawan Arafat, Andril Arwizet Arwizet, Arwizet Ashekul Islam Azis, Ismail Budi Syahri Delima Yanti Sari Desyandri Desyandri Dionova, Aldi Dori Yuvenda Dwi Sakti Putra DWI SURYANTO Egis, Egis Eko Indrawan Elvira Zondra, Elvira Erizon, Nelvi Fadhilah Fadhilah Fadri, Muhammad Al Fahrendra, Aqsal Faisal, Afdal Fathi Aulia DZ Febri Prasetya Firma Yulianis Fitrah Qalbina Fitri Amelia Fonny Maswija Priscilla Hadi, Farhan Handayani, Meisuri Handrianto Handrianto Hendri Nurdin Hidayattullah, Riezky Illahi, M. Ilham Anugrah Irawan, Refitra Irfan, Abdillah Irzal Irzal Irzal, Irzal Jasman Jasman Kandena Putra, Tegar Kiwata, Takahiro Kurniawan, Badri La Ode Ahmad Barata Maresta, Felia Mega Oktaviani Mochammad Haikal Muhammad Akhbar Muhammad Ihsan Muhammad Riski Hidayat Muhammad Shiddiq Muhammad, Maghfiridhani Mulianti Nasution, Ridhollah Nelvi Erizon Nurdin Hendri Nurwijayanti Prasetya, Kresna Adi Pratomo, Muhammad Agung Primandari, Sri Riski Putri Primawati Primawati, Primawati Purwantono Purwantono purwantono purwantono Purwantono, Purwantono Putra, Randi Purnama Rahmadiawan, Dieter Ramadhan, Fadli Refdinal Refdinal, Refdinal Refdinal, Refdinal Remon Lapisa Ridhatul Arif Rifelino Rifelino Riki Saputra, Riki Riky Satria Rizki Ramadhan Nasution, Muhammad Robby, Muhammad Rudy Anarta Salmat, Salmat Sari, Fretina Seprianto, Ekon Sherly Rahmayani Shi, Shih-Chen Sri Rizki Putri Primandari Surya, Fajar Syahril Syahril Syaiful Salim Tamasya, Fido Delfri Teki Haryono Toto Sugiarto Usin Usin Waskito Willy Vernando Yovindra, Difa Yufrizal Yufrizal Yuliardiansyah, Haris Yusmaita, Eka Zainal Abadi Zhuang, Wei-Ting