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All Journal Jurnal Rekayasa Mesin AMMA : Jurnal Pengabdian Masyarakat
Mochamad Denny Surindra
Politeknik Negeri Semarang
Humanities Chemistry Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing

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EKSPERIMENTAL STUDI PERFORMANCE ORGANIC RANKINE CYCLE (ORC) MENGGUNAKAN FLUIDA KERJA R245fa DENGAN SUMBER PANAS DI EVAPORATOR 120oC Mochamad Denny Surindra
Jurnal Rekayasa Mesin Vol 14, No 3 (2019): Volume 14, Nomor 3, Desember 2019
Publisher : Jurusan Teknik Mesin - Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (604.525 KB) | DOI: 10.32497/jrm.v14i3.1646

Abstract

Energi panas yang terbuang dari industri dan sumber energi terbarukan di seluruh dunia dapat digunakan untuk menghasilkan tenaga sehingga mengurangi konsumsi bahan bakar fosil. Salah satu teknologinya adalah Organic Rankine Cycle (ORC) dengan fluida kerja R245fa. Refrigerant R245fa dengan laju aliran massa 0,2 kg/s menghasilkan perpindahan energy panas di kondensor 43,35 kJ/s sedangkan di evaporator sebesar 50,094 kJ/s. Daya poros pompa maksimum sebesar 0,204 kJ/s dan lebih kecil jika dibandingkan dengan daya output sroll expander yang mencapai 5,022 kJ/s. Sehingga daya yang dihasilkan lebih besar daripada daya yang dibutuhkan dan effisiensi thermal ORC system yang tertinggi terjadi pada saat laju aliran massa 0,2 kg/s sebesar 12,3%.
Penerapan Mesin Gerinda Pengasah Pisau Dengan Sudut Ketajaman 45° Untuk Meningkatkan Proses Produksi UD. Hasil Logam Padang Yanuar; Mochamad Denny Surindra; Ignatius Gunawan Widodo; Atikah Ayu Janitra; Sri Harmanto; Ampala Khoryanton; Slamet Priyoatmojo; Supriyo; Luqman Al Huda; Muhammad Devan Balaya
AMMA : Jurnal Pengabdian Masyarakat Vol. 5 No. 6 : Juli (2026): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

This community service initiative was carried out to address the need to improve the productivity of the small and medium enterprises (SME) UD. Hasil Logam Kudus, which specialises in the production of animal feed chopping knives. The knife sharpening process is still carried out manually using a hand-held grinder, taking approximately 25 minutes per knife and resulting in inconsistent sharpening angles. The community engagement team from the Semarang State Polytechnic implemented grinding machine technology featuring a fixed 45° clamping system capable of sharpening three knives simultaneously. Measuring 1134 × 970 × 720 mm, the machine is powered by a 1 HP electric motor with a water-cooling system utilising a 12-volt pump. The results of the project demonstrated a 76 per cent improvement in sharpening efficiency and greater uniformity in the blade’s sharpening angle. Through the application of this appropriate technology, the partner organisation has been able to significantly increase both production capacity and product quality.
Co-Authors Atikah Ayu Janitra Ignatius Gunawan Widodo Khoryanton, Ampala Luqman Al Huda Muhammad Devan Balaya Padang Yanuar Slamet Priyoatmojo Sri Harmanto Supriyo