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All Journal AUSTENIT Machine : Jurnal Teknik Mesin Jurnal Inovator JURNAL CRANKSHAFT MACHINERY: Jurnal Teknologi Terapan International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS)
Sampurno, Rachmat Dwi
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : AUSTENIT

 1 
OPTIMALISASI SISTEM VENTILASI MEKANIK UNTUK MENINGKATKAN KENYAMANAN TERMAL DI RUANGAN TERPAPAR PANAS MATAHARI Paramadhony; Setiati, Tri Woro; Turnip, Parngongo; Akbar, Imam; Sampurno, Rachmat Dwi; Rachman, Fadhiil Fuad
AUSTENIT Vol. 17 No. 1 (2025): AUSTENIT: April 2025
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v17i1.10711

Abstract

Climate change has increasingly influenced thermal dynamics in both outdoor and indoor environments, leading to elevated indoor temperatures that can significantly compromise occupant thermal comfort. This comfort is intrinsically linked to psychological well-being, sleep quality, and overall productivity. Indoor thermal conditions are governed by multiple parameters, including internal and external heat gains, building envelope characteristics, and the effectiveness of ventilation systems. In response, the deployment and optimization of mechanical ventilation systems have become essential strategies in architectural and HVAC design to ensure better indoor environmental quality (IEQ). Moreover, energy-efficient mechanical systems are critical for minimizing operational energy consumption and also for mitigating greenhouse gas (GHG) emissions associated with building operations. This study employs Computational Fluid Dynamics (CFD) simulations to analyze the influence of mechanical ventilation placement on indoor temperature distribution, with a specific focus on enclosures with solar-exposed walls. The findings aim to inform design strategies for ventilation layout optimization that enhance thermal comfort while supporting energy-efficient and sustainable building practices. The research findings indicate that the position of the exhaust fan plays a crucial factor in thermal comfort. When it’s placed near to the heat source, it provides higher airflow near to the heat source that helps maintain temperature stability and prevent the spread of heat throughout the room.
PEMANFAATAN LIMBAH ASAP DARI BATOK KELAPA DENGAN MESIN PENYULING ASAP CAIR DI KABUPATEN BANYUASIN Sampurno, Rachmat Dwi; Homzah, Ozkar F.; Suryana, Didi; Sani, Almadora Anwar; Alexander, Willy
AUSTENIT Vol. 13 No. 1 (2021): AUSTENIT: April 2021
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Batok Kelapa merupakan salah satu bahan yang dapat diproses dalam pembuatan asap cair. Proses produksi arang dari batok kelapa secara tradisional yaitu dengan metode drum klin berpotensi menimbulkan polusi udara. Mesin penyulingan asap cair berbasis mikrokontroller bertujuan untuk membantu para pembuat arang dalam meminimalisisr dampak kesehatan akibat polusi udara dari asap serta menambah pendapatan berupa produk asap cair. Hasil pengujian prototipe diharapkan dapat meningkatan hasil produksi asap cair yaitu membandingkan menggunakan media air dengan temperatur ± 29°C dan menggunakan  refrigerasi yangmana temperatur air diturunkan sampai 15°C dengan pengontrolan mikrokontoller-Arduino UNO. Berdasarkan hasil pengujian di Desa Tanjung Lago Kabupaten Banyuasin diperoleh produk berupa asap cair tanpa sistem refrijerasi sebanyak 203 ml dan penyulingan dengan menggunakan sistem refrijerasi sebanyak 375 ml asap cair.
PENGARUH QUENCHING MEDIA PENDINGIN MINYAK GORENG BEKAS TERHADAP KEKERASAN BAJA S45C YANG TELAH DI PACK CARBURIZING Putri, Fenoria; Gumay, Muhammad Fadel; Effendi, Sairul; Sampurno, Rachmat Dwi
AUSTENIT Vol. 13 No. 2 (2021): AUSTENIT: Oktober 2021
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Material baja seringkali digunakan dalam dunia otomatif yang menuntut material tersebut harus memiliki kekuatan yang tangguh, handal dan ekomonis. Salah satu material yang digunakan yaitu S45C, dimana material tersebut diberikan perlakuan permukaan dengan cara Pack Carburizing    dengan    temperatur  870°C   dan   variasi    media    pendingin    cepat    (quenching) berupa   oli   bekas,   oli   baru,   dan   minyak   goreng   bekas. Selanjutnya dilakukan pengujian menggunakan alat kekerasan Rockweel   Hardness   Tester dan dilakukan analisa   data hasi    uji    menggunakan    analysis    of    varians    (ANOVA). Hasil yang didapat nilai kekerasan untuk material S45C dengan pendingin oli bekas, oli baru dan mnyak goring bekas yaitu 101,9 HRC; 98,4 HRC dan 102,8 HRC.
KARAKTERISTIK PERMUKAAN PATAH DAN KETAHANAN LELAH PADA MATERIAL BEJANA TEKAN BAJA ASTM A36 Azhari, Ikbal; Chandra, Hendri; Homzah, Ozkar F.; Ramadhoni, Tri Satya; Sampurno, Rachmat Dwi
AUSTENIT Vol. 16 No. 1 (2024): AUSTENIT: April 2024
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v16i1.7219

Abstract

Pressure vessels are equipment in the industrial field to hold pressurized fluids, such as gas, oil and chemicals, ASTM A36 steel is one type of material that can be used in pressure vessels, this steel has good mechanical properties but still has limitations in its fatigue resistance. Pressure vessels receive internal and external loads, this pressure difference results in stress on the wall (shell). This stress can cause material damage, therefore the author conducted fatigue repeated bending and Scanning electron microscopy (SEM) testing to analyze fatigue resistance and fracture surface characteristics. Fatigue testing of 4 specimens with angle variations of 4Ëš, 8Ëš, 11Ëš and 13Ëš resulted in a cycle count of 1490200 cycles, 400050 cycles, 234200 cycles and 99000 cycles respectively. SEM results of the fracture surface of the 4Ëš and 13Ëš testing angles of ASTM A36 steel showed striation and microvoid coalescence and crack propagation indicating that the fatigue failure that occurred was ductile fracture. Based on the conclusions obtained, it shows that the number of cycles is influenced by the testing stress, which means that at high stresses, the life time of the pressure vessel will be smaller and vice versa.
OPTIMIZATION ROUGHNESS LEVEL OF TURNING FROM ALUMINUM SCRAP SMELTING RESULT USING SAND CASTING METHOD Gunawan, Indra; Muarif, M. Awal; Fadilah, Muhammad Arif; Sani, Almadora Anwar; Sampurno, Rachmat Dwi; Apandi, Khairul; Achva, RA. Jihan Ulima; Ayuni, Riski
AUSTENIT Vol. 15 No. 2 (2023): AUSTENIT: October 2023
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v15i2.7590

Abstract

The Production Machinery Workshop at the Sriwijaya State Polytechnic are producing a lot of aluminum scrap left over from turning, where this waste is still thrown away. This will cause pollution to the environment and will be detrimental to the Sriwijaya State Polytechnic workshop. Casting is one way to deal with aluminum scrap, scrap be melted and then reshaped into a practical material that can be reused. The use of sand as a printing medium in recycling scrolls is not recommended because it is less effective and efficient in terms of long-term use. After research has been carried out, the resulting aluminum shaving waste can be reused as practical material provided that the shavings must be separated from other waste such as iron and steel. In the optimization process, the best value is obtained at the spindle speed factor of 900 rpm (A1), then the feeding depth at 0.5 mm (B1), and the feeding speed at 0.08 mm/put.  
Co-Authors Achva, RA. Jihan Ulima Alexander, Willy Alimedi, Alimedi Anwar, Zainuri Apandi, Khairul Arnoldi, Dwi Ayuni, Riski Azhari, Ikbal Dodi Tafrant Effendi, Sairul Fadilah, Muhammad Arif Fitriani, Devita Dinda Gumay, Muhammad Fadel Hendradinata, Hendradinata Hendri Chandra Hidayat, Randy HIDAYATI, BAITI Imam Akbar, Imam Indra Gunawan Ismail, Iskandar Karmin Karmin, Karmin Khoirullah, Ananda Thomas Lily Rahmawati, Lily Muarif, M. Awal Mulyadi Mulyadi Muzafar, M. Agil Okviyanto, Toni Ozkar F. Homzah, Ozkar F. Pangestu, Wahyu Adjie Paramadhony Putri, Fenoria Rachman, Fadhiil Fuad Ramadhan, Surya Ramadhoni, Tri Satya Rasid, Muhammad Rifa'i, Ahmad Imam Safei Safei Sailon, Sailon Sani, Almadora A. Sani, Almadora Anwar Setiati, Tri Woro Sumarna, Herlin Sundari, Ella Suryana, Didi Syamsul Rizal Tafrant, Dodi Turnip, Parngongo Utama, Kodri Hudiya Utami, Ogi Meita Yuliandi, Rizky Brillian