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PERBANDINGAN KUALITAS BRIKET CANGKANG KAKAO DAN LIMBAH PLASTIK SELULOSA ASETAT Alfian, Devia Gahana Cindi; Hidayatullah, M Taufik; Muhyi, Abdul; Syaukani, Muhammad; Afisna, Lathifa Putri; Silitonga, Dicky Januarizky; Kolala, Putra Andi
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 1 (2025): Edisi Februari
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51510/sinergipolmed.v6i1.1948

Abstract

Pemanfaatan limbah biomassa sebagai sumber energi alternatif merupakan solusi potensial dalam mendukung keberlanjutan energi. Penelitian ini bertujuan untuk mengkaji karakteristik briket berbahan dasar kulit kakao yang dipadukan dengan selulosa asetat dalam tiga variasi komposisi (%), yaitu A (95:5), B (93:7), dan C (90:10). Briket diproses menggunakan tekanan sebesar 60 kg/cm² dan dikeringkan pada suhu 100°C selama 4 jam. Pengujian dilakukan untuk menentukan kadar karbon, kadar zat terbang, kadar abu, nilai kalor, serta laju dan durasi pembakaran. Hasil penelitian menunjukkan bahwa kadar karbon tertinggi diperoleh pada variasi A (79,29%), yang mendekati standar SNI 1683-2021 dengan batas minimal 79%. Kadar zat terbang pada semua variasi memenuhi standar, dengan nilai terendah pada variasi A (7,05%), lebih rendah dari batas maksimal SNI, yaitu 10-17%. Namun, kadar abu masih jauh melebihi standar, dengan variasi C memiliki kadar abu tertinggi (20,83%), sedangkan batas maksimal SNI adalah 4%. Dari segi nilai kalor, seluruh variasi belum memenuhi standar SNI yang mensyaratkan minimal 6500 kal/g, dengan nilai tertinggi hanya mencapai 4671,63 kal/g. Laju pembakaran tertinggi terjadi pada variasi C (0,26 g/menit) dengan waktu pembakaran 69 menit, sementara variasi A memiliki laju pembakaran terendah (0,22 g/menit) tetapi dengan durasi terpanjang (81 menit), menunjukkan efisiensi pembakaran yang lebih baik. Secara keseluruhan, briket kulit kakao dengan selulosa asetat memiliki potensi sebagai bahan bakar alternatif, tetapi masih memerlukan optimasi lebih lanjut untuk meningkatkan nilai kalor dan menurunkan kadar abu agar sesuai dengan standar nasional.
EVALUASI KINERJA GENERATOR AC SEDERHANA SECARA EKSPERIMEN BERDASARKAN VARIASI KECEPATAN PUTARAN DAN DIAMETER KAWAT Syaukani, Muhammad; Syah, Muhammad Aksel; Arirohman, Ilham Dwi; Afisna, Lathifa Putri; Pujiyulianto, Eko
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.v11i1.786

Abstract

Small-scale renewable energy use is crucial for supplying the world's electrical needs. Utilizing these renewable energy sources requires a device that can transform mechanical power into electrical power. The purpose of this research is to construct a simple AC generator by converting mechanical power into electricity by varying the copper wire's diameter and rotational speed. The outcomes of the investigation include information on the electrical power, torque, mechanical power, and efficiency of the generator. The technical details of the generator employed are 12 poles, a rotor diameter of 9.25 cm, and a stator diameter of 9 cm. The results of the investigation reveal that the generator with the 0.15 mm variation in copper wire diameter performs better than the generators with the 0.75 mm variation in wire diameter. It can generate 80,6 watts of electric power, 1,231 N.m. of torque, 193,468 watts of mechanical force, and 41.66% of efficiency at a rotational speed of 1500 rpm. The result shows that the generator's performance will vary depending on the diameter of the wire at different rotating speeds.
STUDI NUMERIK KINERJA HEAT SINK BERBASIS ALIRAN DUA FASE DENGAN ETIL ASETAT SEBAGAI ALTERNATIF PENDINGIN CONCENTRATED PHOTOVOLTAICS Arirohman, Ilham Dwi; Naimah, Khoirun; Syaukani, Muhammad; Sabar, Sabar
Jurnal Teknologi Terapan Vol 11, No 2 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i2.814

Abstract

Concentrated Photovoltaic (CPV) technology offers the potential to enhance solar energy conversion by utilizing light focusing technology to increase the solar irradiation flux received by photovoltaic cells. On the other hand, as the solar energy density increases on a PV cell, the surface temperature of the PV also rises, which results in decreased energy conversion efficiency and the possibility of thermal fatigue. Therefore, a reliable cooling system is required for CPV. This study aims to evaluate the performance of a two-phase flow heat sink with ethyl acetate (C4H8O2) as the working fluid, which has a low boiling point and high heat of vaporization, making it quite effective for heat transfer. The method used is numerical simulation using Computational Fluid Dynamics (CFD) software. The simulation results show that the heat sink heat transfer effectiveness is 86.03%, with a thermal resistance value of 0.0073 . The highest temperature on the solid part is 105  showing an increasing trend but not significantly, while the average fluid temperature tends to remain constant at 55 . This indicates that the evaporation process is able to maintain the heatsink temperature at stable level.
Edukasi Laboratorium Teknik Mesin ITERA Bagi Siswa SMKN 1 Raman Utara Dalam Meningkatkan Literasi Teknologi Paundra, Fajar; Muhyi, Abdul; Perdana Nurullah, Fajar; Pujiyulianto, Eko; Gahana Cindi Alfian, Devia; Syaukani, Muhammad; Rajagukguk, Kardo; Januarizky Silitonga, Dicky; Andi Kolala, Putra; Nanda Syanur, Farid; Aditia Prahmana, Rico
AMMA : Jurnal Pengabdian Masyarakat Vol. 4 No. 5 : Juni (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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

Abstract

This community service activity aims to introduce the laboratory environment and facilities of the Mechanical Engineering Study Program at Institut Teknologi Sumatera (ITERA) to students of SMKN 1 Raman Utara, East Lampung. The activity was conducted in the form of a campus visit involving 62 12th-grade students from the Light Vehicle Engineering Department. The agenda included a presentation on higher education opportunities, interactive discussions, a Q&A session, and a direct tour of ITERA’s Mechanical Engineering laboratories, including the Materials Engineering, Energy Conversion, Fabrication, Manufacturing, Internal Combustion Engines, and Foundry laboratories. This activity was designed to inspire students to pursue higher education and broaden their understanding of engineering fields. The outcome showed a high level of enthusiasm among the students and successfully achieved the goal of introducing campus life and technological exposure. This initiative is expected to serve as an initial step in strengthening synergy between vocational high schools and higher education institutions.
PENGARUH WAKTU PERENDAMAN ALKALI PADA SERAT AKAR WANGI TERHADAP KEKUATAN TARIK KOMPOSIT BERMATRIKS RESIN POLIURETAN : EFFECT OF ALKALI IMMERSION TIME ON THE TENSILE STRENGTH OF VETIVER FIBER-REINFORCED POLYURETHANE RESIN MATRIX COMPOSITES Paundra, Fajar; Susanto, Rahmat; Syaukani, Muhammad; Prabowo, Prabowo; Rojikin, Setyo
Jurnal Teknik Mesin Vol. 4 No. 1 (2025): JURNAL TEKNIK MESIN
Publisher : Program Studi Teknik Mesin PSDKU Polinema Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/j-meeg.v4i1.6988

Abstract

Alkali treatment using NaOH solution aims to to enhance the mechanical strength of the composite. This study investigates the effect of varying immersion durations of vetiver root fibers in a NaOH solution on the tensile strength of polyurethane-based composites. The vetiver fibers, serving as reinforcement, were cut to a length of 3 cm and immersed in a 5% NaOH solution for 2, 3, 4, and 5 hours, along with a control group without treatment. After soaking, the fibers were rinsed until reaching neutral pH and dried for three days. The composites were fabricated using the compression molding method under a pressure of 5 bar for 24 hours. Tensile tests were conducted following ASTM D638 standards. The results indicate that alkali treatment affected the surface characteristics of the fibers, including cleanliness and structural changes. The maximum tensile strength of 1.592 MPa was achieved with a 4-hour immersion, whereas the lowest tensile strength of 0.893 MPa was recorded after 5 hours of soaking.
PENGARUH VARIASI FRAKSI VOLUME KOMPOSIT AKAR WANGI DENGAN MATRIKS POLIURETAN MENGGUNAKAN METODE COMPERSSION MOLDING TERHADAP KEKUATAN TARIK Paundra, Fajar; Putra, Aditya Septian; Syaukani, Muhammad; Muhyi, Abdul; Fikri, Muhammad Luqman Saiful
Journal of Industrial and Mechanical Engineering Vol 3 No 1 (2025): Journal of Industrial and Mechanical Engineering
Publisher : Department of Industrial Engineering, Universitas Jenderal Soedirman.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jimien.2025.3.1.15558

Abstract

Fraksi volume pada proses pembuatan komposit sangat berpengaruh terhadap kekuatan mekaniknya. Penelitian ini bertujuan untuk mengetahui pengaruh variasi fraksi volume komposit serat akar wangi dengan matriks poliuretan terhadap kekuatan tarik. Bahan yang digunakan dalam penelitian ini adalah serat akar wangi sebagai penguat dan poliuretan sebagai matriks. Variasi fraksi volume serat dan resin yang digunakan adalah 10:90%, 20:80%, dan 30:70%. Proses pembuatan komposit dilakukan dengan metode compression molding selama 24 jam pada tekanan 5 bar. Pengujian kekuatan tarik mengacu pada standar ASTM D638. Hasil penelitian menunjukkan bahwa kekuatan tarik maksimum tertinggi sebesar 1,298 MPa diperoleh pada fraksi volume 30% serat dan 70% resin. Sedangkan kekuatan tarik terendah sebesar 0,777 MPa terjadi pada fraksi volume 10% serat dan 90% resin.
Implementasi Smart Roaster Berbasis IoT dan Sistem Pencatatan Keuangan Digital pada UMKM Kopi Supri Styawati; Amalya, Wulan; Syaukani, Muhammad; Kurniawan, Medy; Khoiri, Rizky; Ferdaus, Ferman
Journal of Community Development Vol. 6 No. 1 (2025): August
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/comdev.v6i1.1722

Abstract

Tujuan dari Program Pengabdian kepada Masyarakat (PkM) ini adalah menghadirkan solusi inovatif bagi UMKM Kopi Jempol Supri melalui penerapan Smart Roaster berbasis Internet of Things (IoT) dengan web monitoring serta Web Pencatatan Stok dan Laporan Keuangan. Permasalahan utama yang dihadapi mitra adalah risiko kegosongan biji kopi akibat pengendalian suhu manual serta pencatatan stok dan keuangan yang masih dilakukan secara konvensional sehingga sering menimbulkan kesalahan. Metode pelaksanaan mencakup sosialisasi, pelatihan, dan pendampingan kepada mitra, serta pengujian sistem dengan pendekatan partisipatif. Uji coba dilakukan pada sensor termokopel, sensor MQ-135, website Smart Roaster, dan Web Pencatatan Stok dan Laporan Keuangan. Hasil menunjukkan adanya peningkatan signifikan pemahaman mitra melalui perbandingan pretest dan posttest. Sensor termokopel membuktikan bahwa kopi mencapai kematangan optimal pada suhu 223–232 °C dengan durasi 80–110 menit, sedangkan sensor MQ-135 menghasilkan data asap yang progresif sesuai tahap roasting. Website Smart Roaster berjalan baik sesuai skenario blackbox testing, mampu menampilkan suhu dan asap secara real-time serta mengendalikan mesin dari jarak jauh. Web Pencatatan Stok dan Laporan Keuangan juga berfungsi optimal, terbukti melalui uji blackbox dan memperoleh skor 90,52% (sangat baik) berdasarkan ISO/IEC 25010 pada aspek functional suitability, performance efficiency, dan usability. Kesimpulannya, penerapan Smart Roaster IoT dan Web Pencatatan Stok dan Laporan Keuangan berhasil meningkatkan konsistensi mutu kopi, mengurangi kerugian produksi, serta mempercepat dan mengefisienkan pengelolaan administrasi pada UMKM Kopi Jempol Supri.
EFFECT OF VARIATION IMMERSION TIME  FIBER HEMP COMPOSITE USING NaOH MATRIX POLYURETHANE ON TENSILE STRENGTH METHOD paundra, fajar; Wibawa, Gilang Putra; Pujiyulianto, Eko; Syaukani, Muhammad; muhyi, Abdul; Nurullah, Fajar Perdana; Syanur, Farid Nanda
Jurnal Pendidikan Teknik Mesin Vol. 24 No. 02 (2024): December 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/4sj3jr07

Abstract

NaOH immersion treatment on hemp fiber is very important in making composites. This is because natural fibers still contain materials such as lignin and hemicellulose so hemp fibers are cleaner and can provide strong fiber and resin attachment. The aim of this research is to find out how the best time for soaking in NaOH for hemp fiber compares to the tensile strength of hemp fiber composites. The materials used are polyurethane and hemp fiber. The research focused on variations without treatment, 2 hours, 3 hours, 4 hours, and 5 hours with a percentage of 5% NaOH and dried under direct sunlight after soaking. Composite manufacture was carried out using the compression molding method for 24 hours with a pressure of 5 bar. Tensile testing was also used in this research with reference to the ASTM D 638 standard. The fiber surface experiences changes in shape such as cleanliness, color and fiber structure which are different in each variation. It should be noted that the maximum tensile strength is 11,597 MPa at 4 hours of immersion, and the lowest tensile strength is 6,054 MPa at 5 hours of immersion. Then the lowest modulus of elasticity value is found in the variation without treatment at 0,049 GPa. The highest value of elastic modulus is found in the 4 hour variation with a value of 0,076 GPa.
Twist and chord optimization using the linearization method on the taper blade of a micro-horizontal axis wind turbineTwist and chord optimization using the linearization method on the taper blade of a micro-horizontal axis wind turbine Syaukani, Muhammad; Aryadi, Anugrah Wahyu; Arirohman, Ilham Dwi; Sofyan, Sarwo Edhy; Bahar, Aditiya Harjon; Sabar, Sabar
Jurnal Polimesin Vol 22, No 5 (2024): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i5.5540

Abstract

The research aims to optimize the geometry of taper blade profiles for the Horizontal Axis Wind Turbine (HAWT) to improve aerodynamic performance and minimize fabrication complexity. The study used blade linearization as an optimization method for identifying a desirable twist (β) and chord (Cr). This approach enhances accuracy and boosts computational efficiency. It simplifies the optimization process by reducing complexity. In contrast, traditional nonlinear methods are slower and more resource-intensive due to complex aerodynamic interactions. The best β and Cr distributions were found by linearization with elements 1 and 10 of the blade length and positions 5%, 15%, 25%, 35%, 45%, 55%, 65%, 75%, 85, and 95% of the blade elements. The linearization results were used to determine the optimum performance of the HAWT design using simulation. The optimal blades for HAWT were fabricated and their performance evaluated under real wind conditions. The linearization of the 45% twist and chord of elements 1 and 10 provided the best blade shape. Optimized twist and chord yielded HAWT performance with the Cp of 45% to 47% at rotational speeds of 200–900 rpm and wind speeds of 2–10 m/s. Twist and chord optimization increased the Cp from 39.71% to 46.43% with a rotational speed of 550 rpm at a wind speed of 6 m/s, as well as the maximum mechanical power from 424.28 watts to 500.35 watts at a wind speed of 10 m/s. The result from real wind conditions showed that manufactured HWAT produced an average electrical power of 294.19 watts at a rotational speed of 590.66 rpm. These results demonstrate that the optimized design approach presents a close match and is still reasonable in comparison to practical conditions.
Analisis Pengaruh Variasi Temperature Curing Terhadap Kekuatan Tarik dan Bending Komposit Hybrid Serat Fiber Glass Dengan Tipe Woven dan Mat Wijaya, Muhammad Hario; Paundra, Fajar; Syaukani, Muhammad; Nurullah, Fajar Perdana
DINAMIKA : Jurnal Teknik Mesin Vol 9, No 2 (2024): Dinamika : Jurnal Teknik Mesin
Publisher : Program Studi Teknik Mesin Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/dinamik.v9i2.8174

Abstract

Material komposit adalah material yang tersusun dari dua atau lebih material yang memiliki sifat ringan, kaku, tahan korosi dan keuletan. Penelitian ini bertujuan mengamati dan menganalisis pengaruh temperatur curing terhadap kekuatan tarik dan bending hyvbrid komposit fiberglass dengan tipe woven dan mat. Material yang digunakan yaitu resin, serat woven dan serat mat dengan metode vaccum bagging bertekanan 14 Psi dan dilakukan proses curing pada temperatur 40oC, 50oC, 60oC, 70oC, 80oC dengan waktu curing selama 2 jam. Pengujian yang dilakukan pada penelitian ini adalah pengujian tarik dan pengujian bending yang merujuk pada standar ASTM D 638 dan ASTM D 790. Nilai kekuatan tarik maksimal komposit fiberglass tertinggi terdapat pada temperatur 60oC dengan nilai sebesar 152,67 MPa dan nilai kekuatan tarik terendah terdapat pada temperatur 40oC dengan nilai sebesar 76,40 MPa. Nilai kekuatan bending maksimal tertinggi juga terdapat pada temperatur 60oC dengan nilai sebesar 547,70 MPa dan nilai kekuatan bending terendah terdapat pada temperatur 40oC dengan nilai sebesar 310,30 MPa.
Co-Authors Abdi Hanra Sebayang Abdul Muhyi Achmad Gus Fahmi Aditia Prahmana, Rico Akasah, Ahmad Akmal Afif Kenedi Akram Tamlicha Alfian, Devia G. C Amalya, Wulan Ammar, Naufal Anugrah, Galang Arirohman, Ilham Dwi Aryadi, Anugrah Wahyu Atmaja, Muhammad Setya Bahar, Aditiya Harjon Chaniago, Noverto Zhorif Devia Gahana Cindi Alfian Devy Setiorini Sa’adiyah Dicky J. Silitonga Duwi Hariyanto Eko Pujiyulianto Eko Pujiyuliyanto Fajar Paundra Fajar Paundra Fajar Paundra Ferdaus, Ferman Fikri, Muhammad Luqman Saiful Fitrah Qalbina Gahana Cindi Alfian, Devia Gita Johannes Saragih Guguk, Kardo Raja Handoyo Handoyo Harmiansyah Hendrarsakti, Joneed Hidayatullah, M Taufik Irza Sukmana, Irza Jalaluddin Jalaluddin Kardo Rajagukguk, Kardo Kenedi, Akmal Afif Khairil Khairil Khoiri, Rizky Kisna Pertiwi Kurniawan, Medy Lathifa Putri A Lathifa Putri Afisna Mahesa, Iqbal Marone J Tambunan Mufidah, Zunanik Muhyi, Abdul Naimah, Khoirun Nanda Syanur, Farid Nicholas Binsar Pandapotan Nurullah, Fajar Perdana Paundra, Fajar Perdana Nurullah, Fajar Prabowo Prabowo Prahmana, Rico Aditia Pujiyulianto, Eko Pujiyuliyanto, Eko Putra Andi Kolala Putra, Aditya Septian Putty Yunesti Rahmat Susanto Riayatsyah, Teuku Meurah Indra Rojikin, Setiyo Rojikin, Setyo Ruly Davisca Pratama Rustam Efendi Sabar Sabar Sabar Sadono, Fajar Sidik Saputra, Aprizal Sarwo Edhy Sofyan Sastra Kusuma Wijaya Setiyo Rojikin Siregar, Ilham Ramadhan Sofyan, Sarwo Edhy Styawati Suharno Suharno Syah, Muhammad Aksel SYANUR, FARID NANDA Taurista Perdana Syawitri, Taurista Perdana Verdia, V Daniel Wibawa, Gilang Putra Wibowo, Gilang Handi Wijaya, Muhammad Hario Yopi Rusdian Santoso Yudi Kurniawan Yudi Kurniawan Yunasdi, Hamda Zhafran Maulana