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All Journal Rekayasa Mesin JMPM (Jurnal Material dan Proses Manufaktur) Jurnal Ilmiah Universitas Batanghari Jambi Infotekmesin Scientific Journal of Mechanical Engineering Kinematika G-Tech : Jurnal Teknologi Terapan Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) Jurnal Teknologi dan Manajemen Journal of Community Services in Sustainability Journal Serambi Engineering (JSE) Majalah Teknik Mesin J-Proteksion : Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin
Abdul Wahid Arohman
Politeknik STMI Jakarta
Agriculture, Biological Sciences & Forestry 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 Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Other

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DESIGN COOLING TOWER OF THE MECHANICAL DRAFT TYPE COUNTER FLOW TO ACHIEVE AMBIENT TEMPERATURE Setiawan, Angga Tegar; Fahrul, Fahrul; Arohman, Abdul Wahid; Anugrah, Fahmi
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i3.1939

Abstract

The application of cooling towers in various industries has been widely used to meet needs. The main purpose of this study is to create an effective cooling tower in the water-cooling process by using the counter flow principle to meet the need to reduce the water temperature of the cooling system in transformers and holders of electric arc furnaces. The method used in the design and construction of the Cooling tower Mechanical draft Type Counter Flow tool includes the stages of planning, designing, making trials, and processing data. The planning stage involves gathering literature, searching for the best design, and determining the design plan. The design stage includes the design of the tool using Computer Aided Design (CAD) and the selection of materials to be used. The manufacturing stage involves assembling machine components into the desired design machine. Heat transfer analysis is also carried out to discover the heat transfer phenomenon. The test results show that the temperature data on the Thot, water cooling tower is 65,9 oC, Tcavity is 48 oC, Twater column is 28 oC, and Tcold is 26,8 oC. So that the design of the tool shows a decrease in temperature at each stage, including Tcavity is 21 oC, T water column is 20 oC, and T tank is 1,2 oC. The mini cooling tower achieved a high cooling range of 35,9 oC and a low approach of 3,2 oC. It can reduce the water temperature from the cooling process in the transformer and holder electric arc furnace. The design has released the hot water temperature from 65,9 oC to 26,8 oC. The design of the tool has succeeded in releasing heat as much as 61,4 kJ/s. Thus, the water from the cooling process can be effectively reused as a cooling medium, offering a practical and efficient solution for enhancing sustainability in small to medium-scale industrial cooling processes.
Effect of SiO₂ Nanoparticle Dispersion on The Stability and Thermal Conductivity of Polyvinyl Ether-Based Nanolubricant Safril Safril; Edwin Sahrial Solih; Ridho Hans Gurning; Adinda Rahmah Shalihah; Abdul Wahid Arohman
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8987

Abstract

Heat transfer efficiency in lubrication systems can be achieved by utilising nanolubricants by dispersing nanoparticle additives into pure lubricants to increase nanolubricant stability and thermal conductivity. This study aims to investigate the effect of silicon dioxide (SiO₂) nanoparticle dispersion in polyvinyl ether (PVE)-based lubricants on the stability and thermal conductivity characteristics of nanolubricants. SiO₂/PVE nanolubricant was prepared using a two-step method with a volume concentration of 0.007%. Stability evaluation was carried out through UV–Vis spectrophotometry testing over a period of 30 days. Thermal conductivity was measured using KD2-Pro at a temperature range of 30 ℃ to 80 ℃. The results of the study showed that SiO₂/PVE was declared stable after 144 hours with an absorbance of 80%. Thermal conductivity characteristics decreased with increasing temperature, and the nanolubricant increased compared to PVE lubricants. The maximum increase in thermal conductivity was 2.72% compared to the pure lubricant, and at a test temperature of 30 °C, SiO₂/PVE was compared to SiO₂/corn oil, SiO₂/paraffin oil, SiO₂/sunflower SiO₂/oil, and SiO₂/soybean oil; the results showed an increase in thermal conductivity of 66.69%, 80.63%, 67.70%, and 46.45%, respectively. The thermal conductivity behaviour tends to increase when SiO₂ nanoparticles are dispersed into the pure lubricant, compared to the pure PVE lubricant and previous studies. These findings indicate that SiO₂/PVE nanolubricant produces a significant increase in thermal conductivity, resulting in accelerated heat transfer, reduced friction and wear, and ultimately leading to increased energy efficiency and improved overall system performance.
Numerical Method-Based Study on Deformation and Fatigue Life of SKD 11 Dies and Punches Fadhil Fadhlurrohman Nurhadi; Abdul Wahid Arohman; Desy Agustin; Hikari Qurrata’ain Nurhadi
G-Tech: Jurnal Teknologi Terapan Vol 10 No 3 (2026): G-Tech, Vol. 10 No. 3 July 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i3.10170

Abstract

Progressive die stamping is critical in automotive component manufacturing, yet fatigue failure of dies and punches remains a key challenge that directly impacts tool life and production continuity. This study aims to evaluate the structural integrity and comparative fatigue life of four steel for cold die (SKD) 11 compound progressive die components: die button, punch pierce, die blank, and punch blank, to translate the findings into practical maintenance scheduling criteria. This study presents a sequential finite element analysis (FEA) framework, comprising static structural analysis followed by stress-life fatigue assessment to evaluate the structural integrity and cyclic service life of SKD 11 tool steel components in a compound progressive die for automotive hanging bracket stamping. Three-dimensional models were analyzed in ANSYS Workbench using tetrahedral meshing with convergence verified at <5% variation in peak von Mises stress. Cutting forces were derived from the formulation P = L × t × σB, with mean stress correction applied via the Goodman approach using empirical SKD 11 S-N data. Static analysis confirmed all components satisfy structural safety criteria, with von Mises stresses ranging from 286 MPa to 979 MPa, all below the SKD 11 yield strength of 1,540 MPa and maximum deformation within 0.023 mm. Fatigue analysis revealed a pronounced life disparity: the die blank exhibited a minimum cycle life of 69,215 cycles, while the punch pierce showed the most critical behavior at 827 cycles. The punch pierce requires inspection every 500–800 cycles, while future research should investigate fillet geometry optimization and surface coating effects to further extend punch service life.
Reduction Cost in Material Spring-type Coil for Heavy-duty Oil Filter By-pass System with Redesigning Adam Satria; Edwin Sahrial Solih; Sanurya Putri Purbaningrum; Abdul Wahid Arohman; Ridho Hans Gurning
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2665

Abstract

The bypass system in oil filters plays a crucial role in maintaining engine cleanliness and performance by allowing oil to flow through the filter when the pressure exceeds set limits. A critical component of this system is the coil spring that controls the bypass valve. In this study, an experimental approach was applied to reduce material cost while preserving performance. We redesigned the spring from four coils of 3.5 mm diameter to three coils of 3 mm diameter, using the same standard hard steel wire SW‑C. The redesigned springs were subjected to a standard impulse test of 250,000 cycles under 7 kgf/cm² pressure and a loading test with deflections from 1 to 10 mm at pressures up to 11 kgf. Results show that the new three‑coil SW‑C spring meets all performance criteria: impulse life and load‑deflection characteristics fall within standard tolerances. A direct comparison with the original design demonstrates negligible differences in functional behavior, confirming that material usage and costs can be reduced without sacrificing reliability. These findings offer valuable guidance for the cost‑efficient production of oil filter components in automotive engineering.
Co-Authors Adam Satria Adinda Rahmah Shalihah Ahmad Arif Aji, Reza Melliyanno Putra Al Kautsar Permana Andi Muhammad Hanif Tjoppo Angga Tegar Setiawan Anugrah, Fahmi B. Handoko Purwojatmiko Desy Agustin Desy Agustin Dewi Auditiya Marizka Dianasanti Salati Edwin Sahrial Solih Fadhil Fadhlurrohman Nurhadi Fadhil Fadhlurrohman Nurhadi Fahrul Fahrul Hasan Sudrajat Hasan Sudrajat Hendi Lilih Wijayanto Hikari Qurrata’ain Nurhadi Ibnu Syihab Indah Kurnia Mahasih Lianny Indra Rizki Pratama Irma Agustiningsih Imdam Lai, Kenny Muhamad Agus Muhamad Agus Mustofa Mustofa Putra, Adhitya Nugraha Duwan Ridho Hans Gurning Ridho Hans Gurning Ridho Hans Gurning Safril Safril Sanurya Putri Purbaningrum Satiman , Bayu Satria, Adam Shalihah, Adinda Rahmah Simajuntak, Felizia Gabriella Solahhudin Solih, Edwin Sahrial Solihin Solihin Sumasto, Fredy Suwandy Suwandy