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All Journal Jurnal Energi Dan Manufaktur Jurnal Keteknikan Pertanian Jurnal Simetris Rekayasa Mesin ROTOR: JURNAL ILMIAH TEKNIK MESIN Asian Journal of Innovation and Entrepreneurship (AJIE) Turbo : Jurnal Program Studi Teknik Mesin JMM (Jurnal Masyarakat Mandiri) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Elemen Jurnal Energi dan Teknologi Manufaktur Abdi Dosen : Jurnal Pengabdian Pada Masyarakat J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin V-MAC (Virtual of Mechanical Engineering Article) Indonesian Journal of Applied Research (IJAR) Mechonversio: Mechanical Engineering Journal International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Journal of Community Development Jurnal Energi Baru dan Terbarukan Jurnal Abdi Masyarakat Indonesia Jurnal Ilmiah Teknik Mesin Poros Mechanical Engineering for Society and Industry Automotive Experiences Jurnal Locus Penelitian dan Pengabdian Journal of Mechanical Engineering, Science, and Innovation Industrial Research Workshop and National Seminar Journal of Earth Energy Science, Engineering, and Technology Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII National Multidisciplinary Sciences Journal of Mechanical Engineering Jurnal Polimesin RESPINARIA: Jurnal Pengabdian Kepada Masyarakat Jurnal Kendali Teknik dan Sains
Nasrul Ilminnafik
Jurusan Teknik Mesin Fakultas Teknik Universitas Jember
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Optimization of biodiesel synthesis process from nyamplung (calophyllum inophyllum) oil using thermal air sparging method Nasrul Ilminnafik; Dani Hari Tunggal Prasetiyo; Welayaturromadhona; Audiananti Meganandi Kartini; Bekti Palupi; Suyitno
Mechanical Engineering for Society and Industry Vol. 6 No. 1 (2026)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.15335

Abstract

This study investigated the optimization of biodiesel production from nyamplung (Calophyllum inophyllum) oil using a Thermal Air Sparging (TAS) reactor with NaOH catalyst. Crude oil containing 18.2% free fatty acids (FFA) underwent a two-stage acid esterification to reduce the acidity below the 2% threshold required for efficient alkaline transesterification. To assess the combined effects of thermal and hydrodynamic variables, a 3² full factorial experimental design with three replications was used, encompassing a reaction temperature of 30–40 °C and a hot air flow rate of 1.0–2.0 L min⁻¹. The produced biodiesel was characterized for density, kinematic viscosity, flash point, and heating value according to ASTM D4052, D445, D93, and D240, respectively. These values ​​were then evaluated against SNI 7182:2015 specifications. Optimal operating conditions were achieved at 35°C and a flow rate of 1.5 L min⁻¹. Reaction temperature emerged as the primary factor influencing biodiesel conversion, while hot air flow rate predominantly affected interfacial contact and residence time. Under these conditions, the biodiesel exhibited a density of 0.867 g·cm⁻³, a kinematic viscosity of 4.67 cSt, a flash point of 183.2°C, a calorific value of 10,283.20 cal·g⁻¹, and a conversion yield of 85.43%. This performance is attributed to the combined effects of heat transfer and dispersion driven by microbubbles, which continuously renew the interfacial surface area between the reactants and promote a more homogeneous reaction environment at atmospheric pressure and relatively low temperature. In contrast to mechanical stirring systems and other high-energy intensification methods, the TAS configuration allows for intensification of the thermofluidic process, reducing reaction time, stabilizing fuel properties, and lowering overall energy consumption. These results demonstrate the potential of TAS as a practical and scalable method for converting non-edible oils with high free fatty acid content into biodiesel through a low-energy process.
Karakteristik spray diesel dan campuran biodiesel nyamplung pada ruang chamber dengan variasi temperatur ambient Lukman Hakim; Nasrul Ilminnafik; Gaguk Jatisukamto; Moh. Nurkoyim Kustanto; Andi Sanata
TURBO [Tulisan Riset Berbasis Online] Vol 11 No 1 (2022): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v11i1.1925

Abstract

Spray characteristics have an important role in improving the quality of combustion in compression engines. This study analyzes the effect of ambient temperature on spray characteristics including spray tip penetration, spray angle and velocity of spray. The research method uses an experimental method with ambient temperature variations of 60oC, 80oC, 100oC controlled using a thermocouple and an ambient pressure of 0.3 MPa. the composition of the fuel uses diesel (diesel 100%), B30 (30% biodiesel), B100 (100% biodiesel). Image recording using camera speed 480 fms. Based on the experimental results, the ambient temperature increases the spray angle and B100 at all ambient temperatures has a spray tip penetration, velocity of spray is lower.
PENINGKATAN KUALITAS PAKAN DAN MANAJEMEN RECORDING BAGI KELOMPOK PETERNAK DOMBA DI JEMBER Nasrul Ilminnafik; Muhammad Trifiananto; Nur Widodo; Muhammad Dimyati Nashrullah; Intan Hardiatama
JMM (Jurnal Masyarakat Mandiri) Vol 8, No 2 (2024): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v8i2.22092

Abstract

Abstrak: Jumlah domba di Kabupaten Jember pada tahun 2020 sebanyak 83.029 ekor. Mitra kami “Lereng Mujan” berlokasi di Desa Klungkung, Jember. Anggota mitra 26 orang dengan jumlah ternak 456 domba dan setiap peternak memiliki 7-35 ekor. Berdasarkan diskusi, mitra memiliki tiga permasalahan yaitu permasalahan teknologi pengolahan pakan hijauan, teknologi bank pakan, dan recording. Domba mitra diberikan pakan hijauan langsung tanpa pencacahan sehingga ternak kesulitan mencerna dan banyak sisa makanan. Pada musim kemarau pakan domba berkurang sehingga gizi domba tidak dapat dipenuhi. Belum diterapkannya recording ternak sehingga kerap terjadi inbreeding dan jumlah ternak tidak terpantau. Mitra diberikan pelatihan berupa skill penggunaan mesin cacah, pembuatan silase, dan recording domba melalui necktag. Setelah pelaksanaan pengabdian prosentase pemahaman pengoperasaian mesin cacah sebesar, pembuatan silase, pemahaman recording ternak, dan tingkat ketrampilan perawatan peralatan berturut-turut sebesar 89%; 81%; 78%; 75%. mitra mampu menghasilkan pakan dengan mesin cacah multifungsi berkapasitas 585 kg/jam. Dari penerapan teknologi silase dan recording didapatkan terjadi peningkatan pakan yang dicacah menjadi 3 sak per hari meningkat 300% . Kemudian 461 domba telah diberikan necktag . Produksi pakan silase sebanyak 65 sak.Abstract: The number of sheep in Jember Regency in 2020 was 83,029. Our partner "Lereng Mujan" is located in Klungkung Village, Jember. There are 26 members with 456 sheep and each farmer has 7-35 sheep. Based on the discussion, the partner has three problems: forage feed processing technology, feed bank technology, and recording. Partner sheep are given forage feed directly without chopping so that livestock have difficulty digesting and a lot of food waste. In the dry season, sheep feed is reduced so that sheep nutrition cannot be fulfilled. Livestock recording has not been implemented so inbreeding often occurs and the number of livestock is not monitored. Partners are given training in the form of skills in the use of chopping machines, making silage, and recording sheep through necktags. After the implementation of the service, the percentage of understanding of the operation of the chopping machine, making silage, understanding livestock recording, and the level of equipment maintenance skills was 89%; 81%; 78%; 75% respectively. Partners are able to produce feed with a multifunctional chopping machine with a capacity of 585 kg / hour. From the application of silage and recording technology, it was found that there was an increase in chopped feed to 3 bags per day, or increase 300%. Then 461 sheep have been given necktags. Silage feed production was 65 sacks.
Performance of a Single Cylinder Diesel Engine Fueled by 40% Biodiesel Blend with Excess Air System Risco Eka Firdausah; Nasrul Ilminnafik; Mochamad Asrofi
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Institut Teknologi Adhi Tama Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.6917

Abstract

In recent years, advances in science and technology have changed human lifestyles and increased global energy consumption. The global innovative search for alternative fuels from renewable sources such as biomass has become important, such as biodiesel. The use of biodiesel in diesel engines requires changes in air supply. Proper air supply is needed to obtain optimal engine performance. The purpose of this study was to determine the effect of using an excess air system on engine performance and exhaust emissions in diesel engines with a mixture of dexlite and biodiesel fuels. The research method used is experimental research and the parameters in this study include the use of an excess air system of 10 L / m, 20 L / m and a load of 300, 400, 500 Watt with biodiesel fuel (B40). The results of this study with the presence of an excess air system can increase combustion efficiency, thus increasing engine engine powerand torque with the most efficient engine power and torque, namely 4.87 KW at a load of 500 watts and 3.101 Nm at a load of 500 watts with excess air of 20 L/m. Fuel consumption also decreases with the presence of an excess air system at 10 L/m load 300 with a value of 0.16 kg/hour. The excess air system can also reduce CO and HC exhaust emissions with excess air of 20 L/m and a load of 300 watts, namely a CO value of 0.02%, an HC value of 18.2 ppm. So the use of excess air is effective in improving engine performance and emissions.
PENGEMBANGAN USAHA TEPUNG IKAN DI DESA NELAYAN PUGER WETAN Sa’diyah, Halimatus; Hadi, Alfian Futuhul; Ilminnafik, Nasrul
Asian Journal of Innovation and Entrepreneurship Vol 1 No 01 (2016): January 2016
Publisher : UII

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ajie.vol1.iss1.art4

Abstract

Puger Wetan is the largest fisheries center in Jember. One of the fish type produced is SardinellaLemuru.  Due to its small size and prickly nature, it is rarely consumed directly. It is commonly sold as raw material for canned sardines. Canned sardines manufacture needs fresh Lemuru, because it will cause itching on the tongue if not fresh. Whereas, fishermen mostly piled the fish in the boat hatch then gave ice cubes, so that the majority of it will no longer be fresh when arrived in the mainland because its perishable nature due to its thin skin.As the result, most of fishermen’s catch is not feasible for canned sardines and become leftovers. During this time, it will be sold at a low price. Fish leftovers that are not absorbed by the market aredumped into the river, becomingleftovers. The waste pollutes the environment and harms the health and hygiene. There will be more wastes during the fishing season, as more and more lemuru leftovers are dumped. This activity aims to resolve the problem by transforming the leftovers into fish meal, using appropriate tech machines. The activities are carried out in several stages. The first stage is the counseling about the negative impact of fisheries waste and the possibility of utilizing it into fish meal, also about the business opportunity that is still potential because domestic demand is still not yet met. The explanation of the importance of business management was also given.The third stage is the practice of making fish meal with the help of tools that have been previously converted technology. The fourth stage is the evaluation of activities for the benefit of partnering groups. Lemuru leftover utilization into fish meal is one of the important components in animal feed which can increase the fishermen income, while reducing environmental pollution.
Syngas as An Alternative Fuel for Spark-Ignition Internal Combustion Engines: A Systematic Review Ainun Huda Gimnastiar; Andi Sanata; Danang Yudistiro; Nasrul Ilminnafik; Agus Triono; Imam Sholahuddin; Dani Hari Tunggal Prasetiyo
Virtual of Mechanical Engineering Article Vol 11 No 2 (2026): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

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

Abstract

The transition to low-carbon energy is driving the development of alternative fuels to replace fossil fuels in spark-ignition engines. One potential candidate is syngas from biomass gasification, given its lower carbon emissions. This study aims to compile a comprehensive synthesis of the use of syngas as an alternative fuel for spark-ignition engines, using the Systematic Literature Review method, following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses. The results show that syngas quality is influenced by the type of gasifier, gasification agent, and operating parameters, with downdraft fixed-bed gasifiers being the most optimal technology. The use of syngas can improve combustion stability and thermal efficiency, but reduces power and torque by 15–35% in spark-ignition engines. With proper gas quality optimization and engine calibration, syngas can be an efficient, reliable, and environmentally friendly alternative fuel for spark-ignition engines.
Co-Authors Achmad Aminudin Achmad Rifqi In'Amullah Adhe Reza Firmansyah Adhika Widyaparaga Agus Triono Ahmad Adib Rosadi Ahmad Adib Rosyadi Ahmad Iqbal Fawaid Ahmad Syuhri Ahmad Zainuri Ainun Huda Gimnastiar Alfariz, Mohammad Rifqy Alfian Futuhul Hadi Alfons Erick Perkasa Alfons Erick Perkasa, Alfons Erick Ali, Reynaldi Akbar Alief Muhammad Aliyansyah, Berly Amirul Yahya Andi Sanata Andi Sanata Apip Amrullah Arifin, Moch Miftahul Aris Zainul Muttaqin As’adi GA, As’adi As’adi GA Atlanta Iwananda Bekti Palupi Cahya Alief Prasetyo Cahyadi, Tedi Setiawan Cahyani, Elisna Tirta Danang Yudistiro Dani Hari Tunggal Prasetiyo Dedi Dwilaksana Deny tomy andrianto Deny Tomy Andrianto Digdo Listyadi, Digdo Dimas Endrawan, Putra Djoko Wahyudi Dony Perdana Doohan Taqdissillah Dwi Djumhariyanto Faiz Firdausi Fiqih Muhammad Firdiansyah, Alfian Freitas, Domingos de Sousa Frenico A.O. Fx. Kristianta Gaguk Jatisukamto Haidzar Nurdiansyah Halimatus Sa'diyah Hari Arbiantara Basuki Hary Sutjahjono Ibnu, Muhammad Khadafi Imam Rudi Sugara Imam Sholahuddin Imam Sholahuddin Indro Pranoto Intan Hardiatama Ivan Bagus Sanjaya Junus, Sallahudin K.W., Robertoes Koekoeh Kartini, Audiananti Meganandi Kristianta, Franciscus Xaverius Kristianta, Fransiscus Xaverius Kurniawan, Eva Luh Putu Ratna Sundari Lukman Hakim Lukman Hakim Lukman Hakim M Katibi Vanhas M. Agung Fauzi M. Agung Fauzi, M. Agung M. Fahrur Rozy Hentihu M. Fathuddin Noor, M. Fathuddin M. Katibi Vanhas Mahmud, Rizal Mahros Darsin Masruri Wardhana Misto Moch. Rizal A. Y. Moch. Rizal A. Y., Moch. Mochamad Asrofi Mochamad Edoward Ramadhan Moh. Nurkoyim Moh. Nurkoyim Kustanto Mubiyn, Shidqi Nur Muh. Nurkoyim, Kustanto Muhammad Dimyati Nashrullah Muhammad Izzuddin Al Haq Muhammad Lutfi Azis Muhammad Nur Cahyo Hidayat Nasrullah Muhammad Nurkoyim Nofal Kharis Nofal Kharis Kharis Nugraha, Raafi Aditya Nur Widodo Nurkoyim Kustanto, Muh Puji Kristianto Putra Dimas Endrawan Putra, Dimas Endrawan Qoyinul Amin Rika Dwi Hidayatul Qoryah Rima Zidni Karimatan Nisa Risco Eka Firdausah Rizal Mahmud Sa'diyah, Halimatus Sa’diyah, Halimatus Salahuddin Junus Santoso Mulyadi Saputra, Toni Haikal Setyo Pambudi Setyo Pambudi Solahuddin, Imam Sumarji Suyitno Syahriza, Mochamad Rifki Syuhri, Skriptyan N.H. Syuhri, Skriptyan Noor Hidayatullah Tanu Alifuddin D. S Trifiananto, Muhammad Welayaturromadhona Widyaningrum Febriolita wigo ardi winarko Wisnu Kuncoro yudan priyo anggono Yuni Hermawan