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All Journal Rotasi Jurnal Teknik ITS Jurnal Simetris Rekayasa Mesin JURNAL INTEGRASI PROSES VANOS Journal of Mechanical Engineering Education Jurnal Rekayasa Mesin Journal of Science and Applicative Technology INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Tekno Insentif Jurnal Teknologi Terapan Journal of Renewable Energy and Mechanics International Journal of Applied Sciences and Smart Technologies Quantum Teknika Jurnal Vokasi Mekanika Sinergi Polmed : Jurnal Ilmiah Teknik Mesin AMMA : Jurnal Pengabdian Masyarakat Perwira Journal of Community Development (PJCD) Majalah Teknik Mesin
Devia Gahana Cindi Alfian
Department Of Mechanical Engineering, Institut Teknologi Sumatera, Jalan Terusan Ryacudu, Desa Way Hui, Kecamatan Jatiagung, Lampung Selatan, Indonesia 35365
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Social Sciences Transportation Other

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PENGARUH VARIASI PEREKAT TERHADAP KARAKTERISTIK BAHAN BAKAR BRIKET CANGKANG KELAPA SAWIT Alfian, Devia Gahana Cindi; Juhensen, Jodi; Paundra, Fajar; Silitonga, Dicky Januarizky
Jurnal Teknologi Terapan Vol 11, No 1 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i1.623

Abstract

This study explores the utilization of Renewable Energy Sources (RES) through the production of biomass briquettes using palm kernel shells as a sustainable energy source. The raw materials include palm kernel shells as the main component, along with tapioca flour, sago flour, and molasses as binders. The production process involves molding under a pressure of 50 kg/cm² and drying at 100°C for 3 hours. Experiments were conducted with variations in the proportions of the main material and binders, resulting in an optimal composition of 75% palm kernel shells and 25% binder. Test results indicate that briquettes with tapioca flour as a binder exhibit the best characteristics, with a moisture content of 3.74%, a calorific value of 5,405.67 cal/g, ash content of 5.77%, fixed carbon of 56.42%, volatile matter of 44.63%, and a burning rate of 0.1939 g/min. This study validates that the developed briquette formulation meets the SNI 01-6235-2000 standard, demonstrating its potential as a sustainable alternative energy source.
THE EFFECT OF ZNO/CUO-WATER- HYBRID NANOFLUID CONCENTRATION RATIO ON HEAT TRANSFER CHARACTERISTICS IN ELECTRONIC EQUIPMENT COOLING SYSTEMS Alfian, Devia Gahana Cindi; Meliala, Arvin Ade Guna; Riayatsyah, T. M. Indra; Silitonga, Dicky Januarizky
Media Mesin: Majalah Teknik Mesin Vol. 25 No. 1 (2024)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v25i1.2464

Abstract

The use of hybrid nanofluids CuO-ZnO /distilled water as a cooling medium was tested in this study to determine the characteristics of convection heat transfer. The hybrid nanofluids preparation process was carried out first by dispersing the CuO and ZnO nanofluids using an ultrasonic cleaner for 3 hours and then allowed to settle for 24 hours. Furthermore, the CuO and ZnO nanofluids were mixed based on the stipulated ration of CuO:ZnO (25%:75%), (50%:50%) and (75%:25) with a volume fraction of 0.5% and agitated for 1 hour. Testing of the hybrid nanofluids CuO-ZnO/distilled water was carried out using a water block as an electronic cooling device with a flow rate variation of 0.7 – 1.9 l/min. From experimental results, the convection coefficient, as one of performance parameters of cooling device, and its relation to Reynolds numbers was able to be determined. Overall, the results show that the rate of heat transfer with the hybrid nanofluids is higher compared to distilled water. At a particular configuration of flowrate and nanoparticle ratio, the hybrid nanofluid has more than 2.5 times higher coefficient of convection than distilled water. In addition, the experiment revealed that the synthesized nanofluid created a temperature drop of around 40ᵒC across the water block at a heater power of 10 W.
Analyzing Temperature Distribution in Multiple Fin Geometries to Optimize Heat Transfer Efficiency Devia Gahana Cindi Alfian; Dicky Januarizky Silitonga
VANOS Journal of Mechanical Engineering Education Vol 10, No 1 (2025)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v10i1.28606

Abstract

This study is quantitative research using Computational Fluid Dynamics (CFD) simulations to optimize pin fin design. Samples include aluminum pin fins with three different geometries: circular, square, and cone, and side lengths of 5 mm, 10 mm, and 15 mm. CFD simulations are conducted to quantitatively analyze temperature distribution across the surface and height of the fins. Results show that the highest temperature is localized at the base plate and decreases along the fin height. Circular and square fins demonstrate more uniform temperature distributions, while cone fins show significant gradients between base and tip. Smaller fin side lengths result in greater temperature differences. This research provides a detailed understanding of how fin geometry impacts heat transfer efficiency and temperature distribution, offering valuable insights for the development of more efficient fin designs in thermal management applications.
Analisis Beban Pendinginan di Ruang Kelas F212 Institut Teknologi Sumatera Manurung, Daniel; Furkhan, M. Aulia; G., Gita Christo; Alfian, Devia Gahana Cindi; Silitonga, Dicky J.; Carlodinho, Samuel; Khaira, M. Irsyad Bin Iskandar
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol. 6 No. 2 (2025): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v6i2.21222

Abstract

Cooling load analysis in the classroom is carried out to support a comfortable learning process. Determining the cooling load is the foundation for planning an air conditioning system for a room. From the results of this determination, the capacity of the AC machine device used can be estimated. The method used in this solution is observation in the room, consisting of direct observation, measurement, and data recording. After obtaining all the data and calculating all possible heat dissipation factors, the total cooling load value in the room is 8584.34 W. The cooling capacity of the AC specifications in the room is 10040 W. Based on the results obtained, the total cooling load is lower than the cooling capacity of the AC in the room. So that the AC capacity in the room can provide comfort for the load in the room.
Analysis of Biomass Briquettes Made from Bagasse Using Tapioca Starch Adhesive with Drying Temperature Variations Alfian, Devia Gahana Cindi; Saputra, Khamid Y. W.; Muhyi, Abdul; Silitonga, Dicky Januarizky
Jurnal Rekayasa Mesin Vol. 19 No. 1 (2024): Volume 19, Nomor 1, April 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i1.4974

Abstract

Dependency on fossil fuels is making their availability increasingly scarce. Renewable energy is considered the best solution to replace fossil fuels, and at present, the primary focus should be on optimizing the utilization of renewable energy sources. As an example, biomass briquettes are being manufactured using bagasse and tapioca flour as adhesive in a 2:3 ratio. This study utilized a compression force of 50 kgf/cm2 and variations in drying temperatures (100 °C, 150 °C, and 200 °C) for 1 hour. The main objective of this research is to compare the quality of bagasse briquettes with the Indonesian National Standard (SNI) No. 01/6235/2000. The test results indicate that the best conditions were achieved at a drying temperature of 200 °C, with a moisture content of 4.47%, a calorific value of 5077.32 cal/g, a combustion rate of 0.1386 g/min, and carbon, volatile matter, and ash content percentages of 22.8333%, 26.845%, and 2.8323%, respectively.
Numerical Beamforming and Parametric Descriptions of Laguerre-Gaussian Vortex Beams Silitonga, Dicky Januarizky; Alfian, Devia Gahana Cindi
International Journal of Applied Sciences and Smart Technologies Volume 05, Issue 02, December 2023
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v5i2.6184

Abstract

Vortex beams are beams with a helical wavefront that have found applications in optical or acoustic tweezers to manipulate microscopic particles. Vortex beam imposes torque or force to particles, allowing them to trap the object within the beam's field and induce motion or displacement in a non-contact manner. One type of such beam is a Laguerre-Gaussian beam, where the solution of a Gaussian wave equation is modified by the Laguerre polynomial term that determines the pattern and helical characteristic of the beam. In this paper, a numerical method based on the mathematical expression of the Laguerre-Gaussian beam is implemented to describe how the parameters change the physical behavior of the beam. This work has shown that a straightforward numerical method is capable of producing this kind of beam. Therefore, this approach can be used for generating vortex beams for physical emissions, complex numerical simulations, or demonstrations for teaching purposes.
PEMBEKALAN DAN SOSIALISASI PENTINGNYA PENDIDIKAN TINGGI BAGI SISWA SMK NEGERI GADINGREJO PRINGSEWU Paundra, Fajar; Alfian, Devia Gahana Cindi; Muhyi, Abdul; Yudistira, Hadi Teguh
Perwira Journal of Community Development Vol 4 No 2 (2024)
Publisher : Unperba Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54199/pjcd.v4i2.311

Abstract

Program Studi Teknik Mesin ITERA mengembangkan disiplin berbasis cabang ilmu teknik mesin yang didefinisikan sebagai ilmu teknik yang mempelajari perancangan, produksi/pembuatan dan operasi mesin. Kunjungan siswa-siswi SMKN 1 Gadingerjo ke kampus merupakan salah satu upaya yang penting dalam memperkenalkan dan mempersiapkan mereka untuk pengalaman pendidikan tinggi. Dalam beberapa kasus, kunjungan siswa ke kampus juga dapat menjadi bagian dari program orientasi atau rekrutmen mahasiswa baru. Hal ini memungkinkan siswa untuk memperoleh pemahaman yang lebih baik tentang persyaratan pendaftaran, proses seleksi, dan tata cara mengajukan aplikasi. Kunjungan dimulai dari Penerimaan Siswa Siswi SMKN1 Gadingrejo di Gedung Kuliah umum yang dilanjutkan dengan sesi diskusi. Selanjutnya kunjungan Laboratorium teknik mesin sebagai sarana pembelajaran kepada para siswa. Dengan demikian, kesimpulan dari sosialisasi program studi Teknik Mesin kepada SMKN1 Gadingrejo adalah bahwa kegiatan ini memiliki dampak positif dalam memberikan informasi, kesempatan, dan motivasi bagi siswa untuk mempertimbangkan dan memilih pendidikan tinggi di bidang teknik mesin sebagai langkah awal menuju karir yang sukses dan memuaskan.
Analysis of Biomass Briquettes Made from Rubber Seed Shells and Acacia Sawdust with Variation in Material Composition Percentage Alfian, Devia Gahana Cindi; Sindhu, I Gede Pande Naraya; Paundra, Fajar; Silitonga, Dicky Januarizky; Nugraha, Andhyka Tyaz
invotek Vol 25 No 2 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i2.1209

Abstract

Indonesia is reducing reliance on fossil fuels by expanding renewable energy, including biomass from rubber-plantation residues and acacia wood. This study evaluates briquettes made from rubber seed shell (RSS) and acacia sawdust (AWS) using 10% tapioca binder, a compaction pressure of 50 kgf cm⁻², and drying at 100 °C for 3 h. Three compositions (RSS:AWS, %wt) were tested: A (50:50), B (70:30), and C (80:20). The best performance was obtained for C (80:20), with moisture 7.40%, volatile matter 9.56%, ash 4.47%, fixed carbon 85.95%, HHV 6,716.88 cal g⁻¹ (28.10 MJ kg⁻¹), and burn rate 0.10 g min⁻¹. All compositions satisfied SNI 01-6235-2000 limits for HHV (≥ 5,000 cal g⁻¹), VM (≤ 15%), and ash (≤ 8%); the moisture criterion (≤ 8%) was met by B and C. For context, SNI 1683:2021 (wood charcoal, not briquettes) imposes stricter thresholds; under these, C is closest to First-Quality ranges, while A and B fall short for several parameters. Overall, increasing the RSS (char) fraction produced briquettes with lower moisture and VM, higher fixed carbon and HHV, and steadier combustion suitable for household fuel.
Implementasi Teknologi Microbubble Generator pada Pengolahan Limbah Cair Kotoran Sapi Devia Gahana Cindi Alfian; Lathifa Putri Afisna; Muhammad Syaukani; Ilham Dwi Arirohman; Harmiansyah Harmiansyah
AMMA : Jurnal Pengabdian Masyarakat Vol. 1 No. 09 (2022): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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

Abstract

Along with the development of the cattle farming industry in Indonesia, many problems arise in terms of waste management. Cow dung waste processing becomes a challenge for the cattle farm industries, especially in handling the liquid waste. Liquid waste produced by cattle farming may pose a negative impact on the health of the people living around the cattle farm if it is not managed properly. One of the efforts to reduce environmental damage due to liquid waste from the farm is by utilizing microbubble generator (MBG) technology to decompose cow dung liquid waste into environmentally friendly waste. The aeration process that occurs in cow dung liquid waste helps aerobic microorganisms to better decompose liquid waste through the addition of dissolved oxygen produced by the microbubble generator in the water. As one of our community service programs, our team came up with an initiative to transfer the know-how of the MBG-based wastewater processing system to a local cattle farm, CV Sanjaya Farm. The program implementation method is by providing training and assistance in the application of MBG technology in the processing of cow dung liquid waste. With an active participation of both our team and partner sides, the MBG technology has been installed at our partner’s locations. As a result of the training and mentoring that we delivered at the partner farm, we observed an increase in the knowledge and skills of both leadership and staff of the partner farm in overcoming the problem of liquid waste management. In addition, a tangible solution has also been built for handling liquid waste to be disposed of into the surrounding environment in a safe and non-polluting manner.
Teknologi Smart Conservation Untuk Identifikasi Spesies Mangrove Di Kawasan Ekowisata Cuku Nyinyi, Lampung Triyana Muliawati; Fuji Lestari; Mika Alvionita Sitinjak; Eristia Arfi; Devia Gahana Cindi Alfian
AMMA : Jurnal Pengabdian Masyarakat Vol. 4 No. 1 : Februari (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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

Abstract

Mangroves are a type of forest ecosystem that grows in coastal areas along tropical and subtropical shores throughout Indonesia, particularly in Lampung Province. This ecosystem is found in regions influenced by tidal seawater. Mangroves consist of various species of trees, shrubs, and other plants that can survive in highly saline and muddy environments. Additionally, mangroves provide numerous benefits for environmental sustainability and human well-being. A healthy mangrove ecosystem contains diverse plant species with specific characteristics that help maintain ecological balance and ensure optimal ecological functions.Lampung Province has a mangrove ecotourism site located in Sidodadi Village, Teluk Pandan District, Pesawaran Regency, known as Cuku Nyinyi. Uniquely, Cuku Nyinyi is often used as a research and learning site for students, researchers, and the general public to study mangroves.One of the challenges faced by the ecotourism management team, the Bina Jaya Lestari Forest Farmers Group (KTH), is the difficulty in identifying and classifying mangrove species planted in the Cuku Nyinyi ecotourism area. Additionally, there is a lack of adequate information about mangroves, such as their age, anatomy, habitat, environmental adaptations, benefits, and other relevant details. To address this issue, researchers are developing an automatic identification system for mangrove species based on leaf morphology using a Convolutional Neural Network (CNN) approach. CNN is one of the most effective methods for pattern recognition in images and mangrove image processing. This technology is expected to be implemented in the form of a camera application that can automatically identify information from an image of mangrove leaf morphology captured in the Cuku Nyinyi ecotourism area.The Mangrove Camera Application provides new insights to KTH and the general public regarding the potential and importance of conserving natural resources.
Co-Authors Abdul Muhyi Achmad Gus Fahmi Adimas Anugrah Rivandy Agus Slamet Riyadi Ahmadien, Ichwan Kurnia Aji, Ahmad Frantoni Andhyka Tyaz Nugraha Andri Sanjaya Arirohman, Ilham Dwi Athallah Satrionindya Herlambang Auriyani, Wika Atro Carlodinho, Samuel Chaniago, Noverto Zhorif Damayanti Damayanti Desi Riana Saputri Devy Setiorini Sa’adiyah Dian Fajarika, Dian Dicky J. Silitonga Dicky Januarizky Silitonga Didik Supriyadi, Didik Dikri Uzlifah Janah Djatmiko Ichsani Eko Pujiyulianto Eko Pujiyulianto Eristia Arfi Fajar Paundra Fajar Perdana Nurullah Fajar Perdana Nurullah Farid Nanda Syanur Firjatullah, Ahmad Labib Fuji Lestari Furkhan, M. Aulia G., Gita Christo Guita Normi Hadi Teguh Yudistira, Hadi Teguh Harmiansyah Hidayatullah, M Taufik Jhonatan Jufrianto Sitorus Juhensen, Jodi Kardo Rajagukguk, Kardo Khaira, M. Irsyad Bin Iskandar Khariman, Muhammad Nur Na’im Lathifa Putri A Lathifa Putri Afisna Manurung, Daniel Marcellino, Andrean Marone J Tambunan Meliala, Arvin Ade Guna Mika Alvionita Sitinjak Mika Margareta Muhammad Syaukani Muhammad Triyogo Adiwibowo Muhyi, Abdul Muliawati Nicholas Binsar Pandapotan Nurullah, Fajar Perdana Paundra, Fajar Petrus, Bastian Roni Prahmana, Rico Aditia Prasetyo, Tri Wahyu Putra Andi Kolala Putra Hidayatulloh Riayatsyah, T. M. Indra Rico Aditia Prahmana Rifqi Sufra Rinda Gusvita Rizky Faesal Sadikin Saputra, Khamid Y. W. Silitonga, Dicky Januarizky Sindhu, I Gede Pande Naraya Sitanggang, Feldrico Andreas Taharuddin Taharuddin Taurista Perdana Syawitri, Taurista Perdana Theodorus Rendy Prasetya Veronika Viany Suswanto Yunasdi, Hamda Yunita Fahni Yusupandi, Fauzi