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All Journal International Journal of Science and Engineering (IJSE) TEKNIK Rotasi Sainteknol : Jurnal Sains dan Teknologi Jurnal Teknologi Rekayasa Mesin Sinergi Prosiding Semnastek DINAMIKA Jurnal Ilmiah Teknik Mesin JTT (Jurnal Teknologi Terpadu) Teknika: Engineering and Sains Journal JRST (Jurnal Riset Sains dan Teknologi) RESISTOR (Elektronika Kendali Telekomunikasi Tenaga Listrik Komputer) Prosiding Semhavok Jurnal Pengabdian Masyarakat Teknik Journal of Applied Sciences and Advanced Technology BASKARA: Journal of Business and Entrepreneurship Indonesian Journal of Computing, Engineering, and Design ABDI MOESTOPO: Jurnal Pengabdian pada Masyarakat Mechanical Engineering for Society and Industry Automotive Experiences Jurnal Teknik Mesin Mechanical Xplore Borobudur Engineering Review Aceh International Journal of Science and Technology
Anwar Ilmar Ramadhan
Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muhammadiyah Jakarta, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Rheological Behaviour of SiO2/PAO Nanolubricant for an Electric-Driven Compressor Automotive Air-Conditioning System Rahman, Muhammad Aminullah Abdul; Azmi, Wan Hamzah; Ramadhan, Anwar Ilmar
Automotive Experiences Vol. 9 No. 2 (2026)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.16357

Abstract

Compressor lubricants play a crucial role in refrigeration systems by controlling friction, sealing effectiveness, and heat removal, with lubricant viscosity a key parameter that affects hydrodynamic losses and energy efficiency. This study aimed to systematically characterise the rheological behaviour of silicon dioxide/polyalphaolefin (SiO₂/PAO) nanolubricants under compressor operating conditions. SiO₂/PAO nanolubricants with concentrations of 0.01–0.03% were prepared using a two-step method without the use of surfactants, and dynamic viscosity measurements were conducted over a temperature range of 25 to 100 °C and shear rate from 549 to 4320 s⁻¹. The experimental data were further used to understand the viscosity trends under thermal and shear conditions. Both PAO lubricant and SiO₂/PAO nanolubricants exhibited Newtonian rheological behaviour. The incorporation of SiO₂ nanoparticles led to controlled, concentration-dependent changes in viscosity. The 0.01% SiO₂/PAO nanolubricant exhibited the smallest viscosity change (0.7%) even at high temperatures and shear rates, compared with higher concentrations. The findings show that low-concentration SiO₂/PAO nanolubricants, especially at 0.01%, offer good rheological stability with minimal viscosity penalty, providing an advantage to the electric-driven compressor automotive air-conditioning system (EDC-AAC) by reducing compressor work by 3.5%.
Pelatihan Kewirausahaan Pembuatan Kacang Telor Sistem Oven Untuk UMKM Dan Ibu PKK Di Kelurahan Kalideres – Jakarta Barat Bambang Setiawan; Anwar Ilmar Ramadhan; Muhamad Ridwan
Jurnal Pengabdian Masyarakat Teknik Vol. 8 No. 2 (2026): Jurnal Pengabdian Masyarakat Teknik (JPMT)
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jpmt.8.2.43-46

Abstract

Pelatihan kewirausahaan kacang tanah telur dengan sistem oven untuk UMKM berakar pada kebutuhan untuk meningkatkan kualitas produk, efisiensi produksi, dan perluasan pasar. Metode oven dipilih untuk menghasilkan produk yang lebih sehat (rendah lemak), tahan lama, dan memiliki tekstur yang lebih renyah daripada metode penggorengan konvensional. Pelatihan ini didasarkan pada: Peningkatan kualitas kesehatan produk, Peningkatan kapasitas dan efisiensi produksi, Peluang bisnis dan nilai ekonomi, serta permintaan pasar. Beberapa masalah yang menjadi fokus area sasaran Pengabdian Masyarakat meliputi: Keterbatasan sumber daya dalam meningkatkan kemandirian warga, Peluang pengembangan kewirausahaan yang belum optimal. Dengan mengidentifikasi masalah-masalah ini, kami bertujuan untuk memberikan solusi dengan memberikan konseling kewirausahaan untuk memproduksi kacang telur dan menyediakan alat produksi atau mesin pemanggang yang mendukung kewirausahaan, serta memberikan pelatihan terkait cara menggunakan alat dan manajemen bisnis. Solusi ini diharapkan dapat meningkatkan kualitas kewirausahaan, membantu warga mengembangkan kemandirian, dan membuka peluang keberlanjutan bisnis yang dapat bermanfaat bagi masyarakat. Untuk keberlanjutan upaya ini, pengoperasian mesin akan dipantau secara berkala untuk memastikan hasil panen dan produktivitas kacang tanah telur yang tinggi. Hasil pengujian menunjukkan bahwa suhu pemanggangan optimal adalah 160°C dan waktu pemanggangan 20 menit, menghasilkan kacang tanah telur yang lezat, matang merata, dan aman untuk dikonsumsi.
An experimental approach to evaluate the stability and thermal conductivity of SiO₂/oil as green nanolubricant Ramadhan, Anwar Ilmar; Hendrawati, Tri Yuni; Saptaji, Kushendarsyah; Umar, Efrizon; Haryadi, Kukuh
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.15463

Abstract

The application of nanotechnology in lubrication science has enabled the creation of nanolubricants with superior stability, improved thermal performance, and greater environmental compatibility than conventional lubricants. In this work, the stability and thermal conductivity of SiO₂ nanoparticles dispersed in base oil were experimentally examined as a green nanolubricant. SiO₂ nanoparticles were chosen owing to their chemical inertness, excellent thermal resistance, and eco-friendly nature. The nanolubricants were synthesized using a two-step method at volume concentrations of 0.1%, 0.2%, and 0.3%, with ultrasonication applied to ensure uniform particle distribution. Their stability was assessed using UV–Vis spectrophotometry, zeta potential testing, and visual sedimentation monitoring over 30 days. Thermal conductivity was determined via the transient hot-wire method. The results demonstrated that incorporating SiO₂ nanoparticles enhanced thermal conductivity by up to 12% compared to the base lubricant. Furthermore, stability evaluation showed zeta potential values of 41.2 mV, confirming strong electrostatic repulsion and low levels of agglomeration. Overall, these outcomes emphasize the promise of SiO₂-based green nanolubricants for thermal engineering applications, offering efficient and sustainable substitutes for traditional lubricants.
Co-Authors Abduh Al Afghani Abdul Kadir Abrori, Muhammad Reza Achmad Nuril Fajar Ade Muslimat Aditya Firmanto Agung Julianto Agung Siswahyu Ahdiat Leksi Siregar Ahmad Fauzi Ahmad Yakub Ahmad Yakub, Ahmad Akmal Imam Faisal Alfa Taufan Latif Alvika Meta Sari Alvika Meta Sari Amri Abdulah Anggoro Septilarso Annisa Mulia Rani Aryadi Suwono As Natio Lasman As Natio Lasman Azhari, Azmir Azmairit Aziz Azmi, Wan Hamzah Bambang Setiawan Bambang Setiawan Boy Setiawan Choirul Anwar Dalil Sumiyarsono, Dalil Daruki Daruki Dede Erland Ramadhan Deni Almanda Dermawan, Erwin Dharu Dewi Dhian Trisnadi Setyawan Diah Safitri Ningrum Dicky Dimyati Dino Rimantho Djoko Hadi Prajitno Djoko W Karmiadji Djoko W Karmiadji Dodi Mulyadi Dyota, Arya Smara edy susanto Efrizon Umar Efrizon Umar Efrizon Umar Efrizon Umar Efrizon Umar Efrizon Umar Eka Revi Ruswandi Eka Revi Ruswandi, Eka Revi Eko Kiswoyo Endang Rudiatin Erwin Dermawan Ery Diniardi Fachri Amrulloh Fadliondi Fahmi Al Diansyah Faisal, Akmal Imam Fathan Mubina Dewadi Fatma Sari Fikri, Muhamad Rausyan Fikriyansyah Fikriyansyah Fikriyansyah, Fikriyansyah Firmansyah Firmansyah Firmansyah Firmansyah Firmansyah Fitriana, Rian Franka Hendra Frisca Amalia Ummay Govinda Gatot Aditya Hadisujoto, Ignatius Budi Sutanto Haris Isyanto Haryadi, Kukuh Hasan Basri Hasan Basri Hasan Basri Hasan Basri Hasan Basri Hayya Afifah Hendra Saputra Husnaini Zulvian Idhar Mahasen Indriasari Indriasari Iphov Kumala Sriwana Irwan Firmansyah Ismiyati Ismiyati Istianto Budhi Rahardja Istianto Budhi Rahardja Istianto Budhi Rahardja Istianto Budhi Rahardja Istianto Budhi Rahardja Iwan Setiawan Januar Parlaungan Siregar Juni Afriani Juniasih, Octarina Adiati Kamila, Fatima Tasya Khoirudin Khoirudin Khoirudin Khoirudin Kisman H Mahmud Korada Viswanatha Sharma Kushendarsyah Saptaji M Al-Haramain M. Ivan Satryo Manasikana, Dinda Arina Maya Dewi Dyah Maharani Mohd Amiruddin Fikri Mohd Fairusham Ghazali Mohd Hamisa Abdul Hamid Muchamad Oktaviandri Muhamad Ridwan Muhammad Arifangga Muhammad Arifangga, Muhammad Muhammad Dadi Saputra Muhammad Daroji Muhammad Reza Abrori Muhammad Reza Abrori, Muhammad Reza Muhammad, Azka Aulia Mulyadi Mulyadi Munzir Qadri Murtalim Mushoffa Ali Firdaus Mushoffa Ali Firdaus, Mushoffa Ali Mutiara Salsabila N Nelfiyanti Nana Rahdiana Nana Rahdiana Nana Rahdiana Natayu, Amartya Nathanael Tandian Nur Yulianti Hidayah, Nur Yulianti Nurrochman, Taufik Nurul Hidayati Fithriyah Nurul Nadia Mohd Zawawi Nurul Nadia Mohd Zawawi Rachman , Aditya Rahardja, Istianto Budhi Rahman, Muhammad Aminullah Abdul Rahmawati Suryani Ramadhani, Mochammad Rafli Rantawi, Azhar Basyir Raslan A. Alenezi Rasma Ratri Ariatmi Nugrahani Rian Fitriana Ricko Valderama Ridhwan Adhitya Ibnimatiin Riki Effendi Rikman Rikman Riza Samsinar Rizalman Mamat Rizkyta, Velia Ayu Roni Muhammad Susanto Rulan Dinary Rulan Dinary Runik Machfiroh Sa'diyah El Adawiyah Saeful Bahri Safril Safril Safril Samhuddin Sasi Kirono Semendo, Rifqi Putra Setiawan, Hanif Rama Yuda Sharifah Norsakinah Syed Zainal Abidin Sharma, Korada Viswanatha Shieddieque, Apang Djafar Siregar, Ahdiat Leksi Sitti Nurbaya Ambo Sony Hari Mukti, Sony Hari Sukarman Sukarman Sukarman Sukarman Sukarman Sukarman Sukarman Sukarman Sukarman Sulis Yulianto Sulistiono Sulistiono Sumanto Suripto, Heri Suroto Munahar Susanto, Roni Muhammad Syawaluddin Syawaluddin Syawaluddin Syawaluddin Syawaluddin Syawaluddin, Syawaluddin Syawaluddin, Syawaluddin Sylvia Madusari Taufik Nurrochman Thomas Djunaedi Tri Yuni Hendrawati Triawan, Farid Trisnadewi, Titin Tumada, Azhari Vector Anggit Pratomo Wahyu Ibrahim Waldi Isnaini Wan Hamzah Azmi Wan Hamzah Azmi Wan Hamzah Azmi Wiwik Sudarwati Wiwit Kartika Sari Yudi Dermawan Yudistirani, Sri Anastasia Yuli Panca Asmara Yusuf Yusuf