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All Journal Rotasi Journal of Mechanical Engineering Science and Technology Turbo : Jurnal Program Studi Teknik Mesin Jurnal Pendidikan Teknik Mesin Undiksha Reswara: Jurnal Pengabdian Kepada Masyarakat AEEJ : Journal of Automotive Engineering and Vocational Education Jurnal Pengabdian Multidisiplin Indonesian Community Journal Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Jurnal Pepadu GEMBIRA (Pengabdian Kepada Masyarakat)
Monasari, Ratna
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Pengaruh Penambahan Zat Aditif Pada Campuran Bahan Bakar Bensin – Bioethanol Terhadap Specific Fuel Consumption Monasari, Ratna; Firdaus, Ahmad Hanif; Qosim, Nanang
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 9 No. 1 (2021)
Publisher : UNIVERSITAS PENDIDIKAN GANESHA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v9i1.31797

Abstract

Pemanfaatan energi terbarukan di Indonesia masih tergolong rendah dibandingkan dengan sumber energi tak terbarukan dari minyak bumi, batu bara, maupun gas alam. Dengan jumlah energi tak terbarukan yang terbatas mendorong untuk mengembangkan penggunaan bahan bakar alternatif. Saat ini bioetanol merupakan salah satu bahan bakar alternatif yang sedang dikembangkan sebagai pengganti maupun campuran bahan bakar bensin, yang dikenal sebagai etanol anhidrat yang memiliki konsentrasi diatas 96%. Campuran bioetanol memberikan pengaruh terhadap peningkatan bilangan oktan dan mampu mengurangi emisi gas buang yang dihasilkan. Untuk mendapatkan efek yang lebih optimal dalam konsumsi bahan bakar zat aditif seperti oxygenated cyclohexanol ditambahkan pada campuran bahan bakar. Studi dilakukan pada perbandingan bahan bakar E5 sampai E15 dengan penggunaan aditif tersebut. Pengujian konsumsi bahan bakar dilakukan pada mesin satu silinder spark ignition dengan posisi bukaan throttle 100%. Terdapat sensor pada bagian tanki bahan bakar untuk menghitung specific fuel consumption (SFC) dengan variasi kecepatan mesin. Penelitian ini bertujuan untuk melihat pengaruh penambahan zat aditif pada campuran bahan bakar terhadap konsumsi bahan bakar.Kata kunci: bensin; bioetanol; emisi gas buang; zat aditif.The use of renewable energy in Indonesia is still low compared to non-renewable energy sources from petroleum, coal, and natural gas. The limited amount of non-renewable energy encourages developing the use of alternative fuels. Currently, bioethanol is an alternative fuel that is being developed as a substitute or mixture of gasoline fuel, known as anhydrous ethanol which has a concentration above 96%. The bioethanol mixture has an effect on increasing the octane number and is able to reduce the resulting exhaust gas emissions. To get a more optimal effect on fuel consumption, additives such as oxygenated cyclohexanol are added to the fuel mixture. Studies were carried out on the comparison of fuel E5 to E15 with the use of these additives. The fuel consumption test was carried out on a single-cylinder spark-ignition engine with a 100% throttle opening position. There is a sensor on the fuel tank to calculate the specific fuel consumption (SFC) with variations in engine speed. This study aims to determine the effect of adding additives to the fuel mixture on fuel consumption.Keywords : fuel; bioethanol; exhaust gas emissions; additives. DAFTAR RUJUKANAbikusna, S., Sugiarto, B., & Suntoro D. (2017). Low Grade Bioethanol for Fuel Mixing on Gasoline Engine Using Distillation Process. in AIP Conference Proceedings. AIP Publishing.Abikusna, S. (2018). The Effect of Additive on Combustion Characteristics and Cycle to Cycle Variations on SI Engine Fueled by Gasoline and Bioethanol, Technology organic and inorganic substances. P. 27-37. Doi: 10.15587/1729-4061.2018.147585Abikusna, S., B. Sugiarto, & Zulfan, A. (2017). Fuel consumption and emission on fuel mixer low-grade bioethanol fuelled motorcycle. in MATEC Web of Conferences. EDP Sciences.Costa, R. C., &  Sodré, J.R.  (2011). Compression ratio effects on an ethanol/gasoline fuelled engine performance. Applied Thermal Engineering, 31(2): p. 278-283.de Melo, T.C.C., et al., 2012. Hydrous ethanol–gasoline blends–Combustion and emission investigations on a Flex-Fuel engine. Fuel, 97: p. 796-804.Costa, R.C. & Sodré, J.R. (2009) . Hydrous Ethanol Vs. Gasoline-Ethanol Blend: Engine Performance and Emissions. International Journal of FuelGao, J. D. J., &  Huang, Z. (2007). Spray Properties of Alternative Fuels: A Comparative Analysis of Ethanol–Gasoline Blends and Gasoline. Fuel. 86(10): p. 1645-1650.Keith, O., & Trevor, C. (1995). Automotive fuels reference book. Society of Automotive Engineers, Inc. Warrendale,  p. 487.Gholamhassan, N. B. G., Yusaf, T. Safieddin, S. M., & Ardebili, R.M. (2015). Optimization of performance and exhaust emission parameters of a SI (spark ignition) engine with gasoline-ethanol blended fuels using response surface methodology. Elsevier, energy xxx: p. 15.Jang, S. H., & Choi, J. H. (2016). Comparison of fuel consumption and emission characteristics of various marine heavy fuel additives. Applied Energy, 179, 36–44. https://doi.org/10.1016/j.apenergy.2016.06.122Monasari, R., Abikusna, S., Sugiarto, B., & Ajiseno, B. (2018). IOP Conference Series: Earth and Environmental Science Analysis of emission gas and fuel consumption on SI engine fueled with low-grade bioethanol and oxygenated cycloheptanol additive Analysis of emission gas and fuel consumption on SI engine fueled with low-grade bioethanol and oxygenated cycloheptanol additive. 105, 12058. https://doi.org/10.1088/1755-1315/105/1/012058Srinivasan, C. A., &  Saravanan, C. (2010). Study of Combustion Characteristics of an SI Engine Fuelled with Ethanol and Oxygenated Fuel Additives. Journal of Sustainable Energy & Environment. 1(2): p. 85-91.Sugiarto, B. (2002) Motor Pembakaran Dalam. Jakarta: Universitas Indonesia. ISBN 979- 97726-7-2.Thangavelu, S. K., Ahmed, A. S., & Ani, F. N. (2016). Review on Bioethanol as Alternative Fuel for Spark Ignition Engines. Renewable and Sustainable Energy Reviews. 56: p. 820-835Zhao, L., Wang, X., Wang, D., & Su, X. (2020). Investigation of the effects of lean mixtures on combustion and particulate emissions in a DISI engine fueled with bioethanol-gasoline blends. Fuel, 260, 116096. https://doi.org/10.1016/j.fuel.2019.116096
MONITORING PADA UNIT GRADER 825A-2 DENGAN ALAT DATA LOGGER BERBASIS INTERNET OF THINGS PT KALIMANTAN PRIMA PERSADA JOBSITE INDE Pratama, Argiansyah Bayu; Monasari, Ratna; Khambali, Khambali; Pratama, Rizki Priya
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 1 (2025): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i1.4145

Abstract

The GD825A-2 Grader Unit at PT Kalimantan Prima Persada Jobsite Indehas an average Physical Availability (PA) value of 89%, below the target of 92%, due to the high unscheduled breakdown. Manual monitoring of sensor parameters is one of the causes of delays in damage detection. This study designs and implements an Internet of Things (IoT)-based monitoring tool with a data logger to read sensor data in real-time. The methods used include testing sensor accuracy against manual measuring instruments, descriptive statistical analysis, errors, and process capability tests. The results show a temperature sensor error rate of 2%, oil pressure 5%, and engine rotation 0.11%. All sensors are also proven to be stable, within statistical control limits, and have decent process capabilities. This system allows for accurate, fast, and remote monitoring of unit conditions, thereby reducing the risk of breakdown, and optimizing maintenance costs for the GD825A-2 unit.
Pengaruh Ukuran Venturi dan Rasio Kompresi Terhadap Torsi dan SFC Motor Bensin 2 Langkah 149 cc Monasari, Ratna; Fatazar, Iqbal Irza
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 5 No 1 (2024): AEEJ : Journal of Automotive Engineering and Vocational Education
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v5i1.238

Abstract

Most motorbike users desire enhanced engine performance beyond the usual level. Typically, users of 2-stroke motorcycles enhance engine performance by modifying the diameter of the carburetor venture and adjusting the compression ratio. This study employs an experimental approach to investigate the impact of alterations in venturi size and compression ratio on the performance of a 2-stroke petrol motorcycle. Torque measurements are obtained using a dynamometer, whereas fuel consumption measurements are obtained using a burette. Subsequently, the generated results are utilized as graphical representations for analysis. Based on the findings of torque research, the utilization of a venturi diameter of 29 mm coupled with a compression ratio of 7.5:1 demonstrates the most significant enhancement in torque. Meanwhile, the findings of the SFC research indicate that using a venturi diameter of 28 mm and a compression ratio of 7.5:1 yields the lowest value. Sebagian besar pengguna sepeda motor menginginkan kinerja mesin yang lebih baik daripada kinerja mesin standar. Pada umumnya pengguna motor 2 langkah untuk meningkatkan kinerja mesin melakukan perubahan pada diameter venturi karburator dan rasio kompresi. Penelitian ini menggunakan metode eksperimental yang bertujuan untuk mengetahui perubahan ukuran venturi dan rasio kompresi terhadap kinerja motor bensin 2 langkah. Pemgambilan data torsi menggunakan alat dynamometer sedangkan pengambilan data konsumsi bahan bakar menggunakan alat buret. Kemudian hasil yang diperoleh dijadikan grafik untuk dilakukan analisis. Mengacu pada pada hasil penelitian torsi, penggunaan diameter venturi 29 mm dengan rasio kompresi 7,5 : 1 menunjukkan peningkatan torsi paling tinggi. Sedangkan pada hasil penelitian SFC, penggunaan diameter venturi 28 mm dengan rasio kompresi 7,5 : 1 menunjukkan nilai paling rendah.
Transformasi Digitalisasi Manajemen Keuangan dan Peningkatan Kapasitas Produksi UMKM Pie Ngalam Heritage melalui Program Pelatihan Berbasis Mitra Farida, Nike Nur; Putra, Agus Dwi; Monasari, Ratna; Susanto, Susanto; Afifa, Ulfiana Ihda
I-Com: Indonesian Community Journal Vol 5 No 3 (2025): I-Com: Indonesian Community Journal (September 2025)
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/i-com.v5i3.8045

Abstract

UMKM berperan penting dalam perekonomian, namun masih terkendala pada pencatatan keuangan sederhana dan keterbatasan kapasitas produksi. Program pengabdian ini dilaksanakan pada UMKM Pie Ngalam Heritage melalui dua tahap, yaitu pelatihan digitalisasi pencatatan keuangan dan akuntansi dasar (11–13 Agustus 2025), serta pelatihan peningkatan kapasitas produksi menggunakan dough mixer kapasitas besar (6–9 September 2025). Metode kegiatan meliputi workshop interaktif, demonstrasi teknis, dan pendampingan. Hasil menunjukkan mitra mampu menerapkan pencatatan keuangan digital, menyusun laporan bulanan, dan memahami akuntansi dasar. Kapasitas produksi meningkat dari 70 pie/hari menjadi 250 pie/hari, atau naik sekitar 257%, dengan mutu lebih konsisten, sementara strategi pemasaran digital dan roadmap bisnis tersusun lebih terarah. Kegiatan ini berhasil meningkatkan daya saing UMKM serta mendukung pencapaian SDGs poin 8 dan IKU perguruan tinggi vokasi.
UPAYA PENURUNAN POTENSI KERAWANAN LINGKUNGAN MELALUI PEMASANGAN PAGAR PENGAMAN DI DESA NGENEP KEC. KARANGPLOSO KAB. MALANG Nurhadi, Nurhadi; Walid, Achmad; Farida, Nike Nur; Monasari, Ratna; Aji, Supa Kusuma; Winoko, Yuniarto Agus
Jurnal Pepadu Vol 6 No 3 (2025): Jurnal Pepadu
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/gg14m884

Abstract

RT 04 RW 16, Ngenep Village, Karangploso District, Malang Regency faces environmental vulnerability due to a damaged security fence, allowing outsiders to enter and exit freely, increasing the risk of safety disturbances. This problem is worsened by the fact that the housing estate management was abandoned after the developer was declared bankrupt, forcing residents to manage the environment independently. This situation raises concerns about neighborhood security and urges the need for a concrete, collective solution to mitigate the issue. This community service activity aims to reduce environmental vulnerability by designing and constructing a permanent safety fence in a vacant lot prone to security risks as a preventive measure to enhance neighborhood safety. The methods include analyzing the partner's problems, determining priority issues, designing the fence using AutoCAD, and constructing a 7 x 3.25-meter fence consisting of stone foundations, cast pillars, and lightweight brick walls. The results showed that the safety fence was successfully installed as planned, serving as a physical barrier that limits outsider access, enhances residents' sense of security, and fosters community awareness regarding environmental safety. An evaluation of the project revealed a cost efficiency of 17% compared to the initial Budget Plan (RAB). This activity is expected to serve as a practical solution model for other areas facing similar challenges in community-based environmental security management. Moreover, this project has had a positive impact by increasing community solidarity and encouraging a spirit of mutual cooperation among residents to protect their neighborhood environment.
Co-Authors Abikusna, Setia Afifa, Ulfiana Ihda Ahmad Hanif Firdaus Aini, Fica Aida Nadhifatul Aji , Supa Kusuma Aji, Supa Kusuma Akhlis Rizza, Muhammad AM Mufarrih Amalia, Zakiyah Amrullah, Radhi Nurvian Anggit Murdani Astuti, Fina Andika Frida Dharsono, Ekky Yovianto Emzain, Zakki F Etik Puspitasari, Etik Farida, Nike Nur fatazar, iqbal irza Khaerudin, Dian Noorvy Khambali, Khambali Kurniawan, Alfian Seina Lisa Agustriyana N. R., Siti Duratun Nanang Qosim Nila Alia Nurhadi Pratama, Argiansyah Bayu Putra, Agus Dwi Raharjo, Nain D Rizki Priya Pratama, Rizki Priya Susanto Susanto Talifatim Machfuroh, Talifatim Walid, Achmad Yanuar Mahfudz Safarudin Yuniarto Agus Winoko, Yuniarto Agus Zainuri, Ach. Muhib Zakki Fuadi Emzain