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All Journal Jurnal Rekayasa Mesin Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif
Novita Sari, Eli
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Aerospace Engineering Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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STUDI PENGARUH VARIASI KOMPOSISI BIORESIN EPOKSI- MINYAK KELAPA SAWIT UNTUK APLIKASI CORE SANDWICH MATERIAL LAMBUNG KAPAL Novita Sari, Eli; M Fauzi Soulton; Duratun Nasiqiati Rosady, Siti; Kusnandar
Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif Vol. 1 No. 1 (2022): Jurnal Inovasi Teknologi Manufaktur, Energi, dan Otomotif
Publisher : Politeknik Negeri Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57203/jinggo.v1i1.2022.11-20

Abstract

Vegetable oil is biodegradable, non-toxic, environmentally friendly, and renewable so that it becomes an alternative to replace mineral oil and chemicals. This research will develop a bioresin which is a mixture of epoxy with natural polymer such as palm oil. The homogenization method uses a hot plate so that the mixing reaches miscible materials. The results of bioresin testing with variations in the composition of palm oil showed that the optimal composition variation was E-MS (10%) because it had a low tensile strength value of 53.111Mpa. While the highest elongation value is 14.04767%, and has a low hardness value of 86.3 on the shore D scale. The highest density value is 1.25254(g/cm3). Judging from the standard L'loyd Register and BKI (Indonesian Classification Agency) that the values ​​of all tensile strength test results meet the standards and all variations in the composition of the test results and elongation values ​​meet the minimum criteria.
STUDI NUMERIK KARAKTERISTIK DISTRIBUSI ALIRAN DAN TEMPERATUR PADA PENDINGIN OLI PELUMAS DENGAN VARIASI MULTI-STEP BLOCKER Duratun Nasiqiati Rosady, Siti; Novita Sari, Eli; Maknunah, Jauharotul
Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif Vol. 1 No. 1 (2022): Jurnal Inovasi Teknologi Manufaktur, Energi, dan Otomotif
Publisher : Politeknik Negeri Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57203/jinggo.v1i1.2022.21-36

Abstract

Lube oil cooler serves to lower the temperature of the lub eoil in the gas turbine lubrication system. The problem that often occurs is the oil exit temperature is still high. This causes process failure in the lubrication system because the working temperature exceeds the allowable temperature. This failure is caused by non-uniformity flow distribution of the lube oil cooler. Therefore, further studies are needed to improve the uniformity of flow distribution. To increase the uniformity of flow, modification of the shape of the inlet header and variations of the lubricating oil capacity on the performance of the lubricating oil cooler were carried out. The research method used is numerical simulation with ANSYS FLUENT software. The simulation is carried out in 3 dimensions with a turbulence model in the form of k-ε RNG using a pressure based solution solver. Making geometry and design specifications using GAMBIT software. Geometric data is the dimensions of the lubricating oil cooling system and data from previous studies. The simulation is carried out in the form of a base line header with a modification of the inlet header, namely a multi-step blocker with variations of the Reynolds Number of 3088, 5146, and 7616. Based on the results of numerical simulations that have been carried out, the lowest Non-uniformity flow rate is at Re = 3088 sebesar, Ф = 0.01594, Exit Temperature 76.620 oC, and Pressure Drop 639.265 N/m2.
PENGARUH VARIASI PUTARAN SPINDLE TERHADAP WAKTU DAN BIAYA PROSES PRODUKSI PENINGGI SHOCK BREAKER DEPAN PADA MESIN CNC TU-2A DENGAN MATERIAL ALUMINIUM 6061 Novita Sari, Eli; Ihza Rizaldi, Yusfi; Duratun Nasiqiati Rosady, Siti; Soulton, M Fauzi
Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif Vol. 1 No. 2 (2023): Jurnal Inovasi Teknologi Manufaktur, Energi, dan Otomotif
Publisher : Politeknik Negeri Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The development of science and technology is in balance with the development of industrial technology. The development of this technology is evidenced by the invention of the CNC machine which is a machine tool that is controlled using a numerical control system. The purpose of this study was to find the effect of variations in spindle rotation on the time and cost of the production process for increasing the front shock breaker on a TU-2A CNC machine with 6061 aluminum material. and conclusion. From the results of this study it can be concluded that: (1) There is an influence of variations in spindle rotation, namely at 1,700, 2,200 and 2,700 rpm the resulting production time for increasing the front shock breaker is 25.87, 25.9 and 26.03 minutes/product, respectively. (2) There is an effect of variations in spindle rotation, namely at 1,700, 2,200 and 2,700 rpm, the production cost of increasing the front shock breaker respectively is Rp. 230,347,-; Rp. 230.368,-; Rp. 230,388, - / product. (3) Variation of spindle rotation that results in the lowest production time and costs is work with a spindle rotation of 1,700 rpm, which is 25.87 minutes/product and costs Rp. 230,347,- / product. Keywords: Heightening shock breaker, spindle rotation, total time and cost
Analisis Pengaruh Kedalaman Potong terhadap Getaran dan Kekasaran Permukaan pada Proses Bubut Material Baja Karbon ST37 Rafi Malik, Abdur; Anam, Chairul; Wahid, M Abdul; Muzaka, Khairul; Novita Sari, Eli
Jurnal Rekayasa Mesin Vol. 24 No. 2 (2024): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v24i2.553

Abstract

Machine tools play an integral role in the industrial production process, including the manufacturing and repair of components. One of the commonly used machines in the manufacturing industry is a lathe, which is used to cut a rotating workpiece using a tool. One type of steel that is often used is ST 37 steel, which has a carbon content of less than 0.3%. Although highly ductile, the surface hardness of the steel is low and requires modification before being used for certain applications such as the construction of machinery that rubs against each other. Vibration in machinery can cause discomfort, lack of accuracy in measurement, or even damage to the machine. The surface roughness characteristics of the workpiece are also influenced by cutting conditions and cutting tool geometry. Therefore, this study aims to analyze the effect of variations in depth of cut on vibration and surface roughness in the lathe process of carbon steel material ST 37. The results of the research on vibration testing obtained the vibration speed value is influenced by the depth of cut. The greater the depth of cut, the higher the vibration speed, while the smaller the depth of cut, the lower the vibration speed, While the surface roughness test at a depth of cut variation of 0.4 mm, 0.5 mm, and 0.6 mm is obtained with the average value of the HSS tool surface roughness of 2.128 µm, 3.841 µm, and 4.032 µm, respectively.
Analisis Manajemen Termal LiFePO4 (Lithium Iron Phosphate) dengan Pendinginan Bubble Generator dan Tanpa Bubble Generator Ilmi Maulana, Muhammad; Catrawedarma, IGNB.; Novita Sari, Eli; Satria Prasetya DY, IGNA; Ridlo Pamuji, Dian
Jurnal Rekayasa Mesin Vol. 24 No. 2 (2024): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v24i2.554

Abstract

Lithium Iron Phosphate (LiFePO4) batteries are known for their long life, low self-discharge rate, and stable performance. However, LiFePO4 batteries are prone to thermal problems when operating outside the optimal temperature range of 25-40°C [12], which can threaten the performance, safety, and lifetime of the battery. Previous research has shown cooling systems to be a solution to these thermal issues. However, the use of an internal cooling system risks changing the voltage and causing the battery to overheat. Therefore, an approach using an external cooling system is recommended to maintain the performance of Li-ion batteries without changing their internal components. In an effort to improve the thermal management of LiFePO4 batteries, this study proposes to analyze the use of cooling with bubble generator and without bubble generator. The bubble generator here is intended to increase the random movement of water in the cooling system so that heat absorption becomes more optimal. This study uses a circulating cooling system with water pump media, airator, bubble generator and cooling using water, for the flow container that circulates in the battery cells we use acrilyc mica. The results of the influence of variations in bubble generator testing average temperature values on LiFePO4 batteries of 16.26ºC to 23.94ºC. and the influence of variations in testing without bubble generators average temperature values on LiFePO4 batteries of 17.62ºC to 25.57ºC, From this study it can be concluded that the bubble generator is able to cool 90% of the operational temperature 25-40 °C.
Studi Eksperimental Pemisah Minyak-Air Menggunakan Hidrosiklon-Bubble Generator berdasarkan Variasi Diameter Underflow Rimbita, Trismi; Catrawedarma, IGNB.; Novita Sari, Eli; Wahid, M. Abdul; Fiveriati, Anggra
Jurnal Rekayasa Mesin Vol. 24 No. 2 (2024): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v24i2.555

Abstract

Oil and water are two liquids that are often usedby both the public and industrial companies. Mixing oil and water need to be separated in various industries such as waste processimg, oil and gas production, and other industrial processes. Hydrocyclone is a separation method with the principle of sparation based on specific gravity which utilizes centrifugal fore by adding a bubble generator to the input section and adding variations in the underflow diameter. This research aims to analyze the performance of a hydrocyclone bubble generator based on underflow variations as oil-water separation. This bubble generator is used to make it easier to suck in air. The variations in underflow diameter used are 10mm, 15mm and 20mm. This research was carried out inject a mixture of oil and water into a hydrocyclone system as a sparation medium. The air flow injeted into the bubble generator uses air flow variations of 0.1, 0.6 and 1.2 lpm (liters/minute). From the research that has been carried out, the results show that the larger the underflow opening, the greater the pressure in the underflow, so that the underflow pressure drop is greater. The smaller the underflow opening, the greater the overflow pressure, so the overflow pressure drop is greater. The greater the input air flow, the greater the difference in underflow and overflow pressure drop. The smaller the valve opening, the lower the efficiency of oil separation in overflow and the greater the efficiency in underflow. The highest efficiency results on overflow are 88.6%.
Co-Authors Anggra, Fiveriati Chairul Anam, Chairul Duratun Nasiqiati Rosady, Siti IGNB. Catrawedarma Ihza Rizaldi, Yusfi Ilmi Maulana, Muhammad Kusnandar M Fauzi Soulton Maknunah, Jauharotul Muzaka, Khairul Rafi Malik, Abdur Ridlo Pamuji, Dian Rimbita, Trismi Satria Prasetya DY, IGNA Soulton, M Fauzi Wahid, M Abdul Wahid, M. Abdul