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All Journal Infotekmesin Advance Sustainable Science, Engineering and Technology (ASSET) Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Muchammad
Universitas Diponegoro
Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Public Health Social Sciences

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Produksi Biofuel Berbahan Baku Mangrove Untuk Substitusi Bahan Bakar Gasoline Syarifudin Syarifudin; Eflita Yohana; Muchammad; Suhartana; Kusnadi; Faqih Fatkhurrozak; Firman Lukman Sanjaya
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2318

Abstract

Dependence on fossil fuels requires a solution through alternative fuels. Ethanol is the recommended solution because it is easy to produce using raw materials that are abundant in nature, such as mangrove fruit. The Rhizophora Mucronata type of mangrove fruit contains 45.22% carbohydrates and is not used as raw material for human food. The research aims to produce ethanol biofuel from mangrove raw materials using multistage distillation. Experimental methods were applied at the stages of mangrove flour production, mangrove flour property testing, saccharification and fermentation, mangrove ethanol distillation, and analysis of potential performance and exhaust emissions. The research produced mangrove biofuel with an alcohol content of 28% which was produced from mangrove flour and had an ash content of 1.91%, protein, 2.24%, fat 0.53%, and water 11.61%. In addition, mangrove biofuel has higher viscosity and density properties than Gasoline at 0.8067Cp and 0.8115 g per mL respectively. The use of mangrove biofuel as a result of experiments is predicted to reduce fuel injection performance.
Sugihmanik Tofu Industry MSME Strengthening with Integrated Implementation of Biogas Energy Conversion to Electricity: Penguatan UMKM Industri Tahu Sugihmanik dengan Implementasi Terintegrasi Konversi Energi Biogas ke Listrik Sri Hartini; Muchammad; Suroto Munahar; Dhimas Cahyo Anindito; Bagiyo Condro Purnomo
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol. 8 No. 4 (2024): Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : DPD Jatim Perkumpulan Dosen Indonesia Semesta

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Abstract

Sugihmanik, Tanggungharjo District, Grobogan Regency have tofu industry center with 30 Micro, Small, and Medium Enterprises (MSME). It is hoped that these MSMEs can improve the community's economy, but on the other hand they can also cause pollution problems for the environment. The waste produced in tofu processing production activities reaches an average of 67,997 m3/day from tofu production, with a total demand for soybeans of around 3200 kg/day. Some of this waste is thrown into rivers, which hurts the ecosystem in a chain that results in the death of aquatic animals, the agricultural environment, and unpleasant odors. Based on the problems in MSMEs, this activity proposes the technology design for converting biogas gas into electricity. The method to solve this problem is to utilize energy from tofu industry waste converted into electrical energy. In implementing biogas conversion technology, it can be tested with a partner electricity load of 1500 watts. However, this technology still has several obstacles. When changing modes, the generator machine for converting biogas into electrical energy requires a manual synchronization system. So, it requires training from partners. In the future, this activity will continue with the development of automatic synchronizing control systems, making it easier to use
CFD-Based Thermohydrodynamic Analysis of Vegetable Oil Lubricants in Journal Bearings Muchammad; Budi Setiyana; Agus Suprihanto; Achmad Widodo
Advance Sustainable Science Engineering and Technology Vol. 8 No. 3 (2026): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i3.3607

Abstract

This study investigates the thermohydrodynamic performance of journal bearings lubricated with palm trimethylolpropane (TMP) ester as a biolubricant, compared to conventional engine oil, using computational fluid dynamics (CFD) in ANSYS Fluent. The objective is to evaluate the influence of lubricant type on pressure distribution, load carrying capacity, friction force, and cavitation behavior. The results show that palm TMP ester generates higher hydrodynamic pressure while maintaining a similar pressure distribution pattern to engine oil. The load carrying capacity increases significantly by approximately 493% at 48 rad/s and 343% at 68 rad/s compared to engine oil. However, this improvement is accompanied by an increase in friction force of about 280% and 234% at the respective speeds due to higher viscosity. In addition, the vapor volume fraction ranges from 0.69 to 0.73, indicating cavitation, with palm TMP ester showing a slightly higher tendency. These findings demonstrate a trade-off between enhanced load support and increased friction, highlighting the potential of palm TMP ester as an environmentally friendly lubricant for hydrodynamic bearing applications.
Co-Authors Achmad Widodo Agus Suprihanto Bagiyo Condro Purnomo Budi Setiyana Dhimas Cahyo Anindito Eflita Yohana Faqih Fatkhurrozak Firman Lukman Sanjaya Kusnadi Sri Hartini Suhartana Suhartana Suroto Munahar Syarifudin Syarifudin