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All Journal JSAI (Journal Scientific and Applied Informatics) Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin
Bismantolo, Putra
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Computer Science & IT Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Analisis Manajemen Layanan TI pada Kebangkrutan E-commerce jd.id Menggunakan Kerangka Kerja Infrastructure Technology Information Library (ITIL v3) Anggriani, Kurnia; Ferzha Putra Utama; Okta Piani, Sri; Vatresia, Arie; Bismantolo, Putra
JSAI (Journal Scientific and Applied Informatics) Vol 7 No 2 (2024): Juni
Publisher : Fakultas Teknik Universitas Muhammadiyah Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36085/jsai.v7i2.6348

Abstract

E-commerce has recently become a place that is in great demand by consumers to shop. In general, e-commerce is a term used to describe the sale of goods and services via the internet. Among the many e-commerce services in Indonesia, one of them is JD.id. This research aims to look at the IT services used by JD.id previously by looking at the processes of domain service operations with the ITIL V3 framework and finding out the extent of management of the IT services used by JD.id before JD.id closed. The method used in this research is a quantitative descriptive method and the assessment of the results of this research is based on the answers to the questionnaire given to respondents using a Likert scale. The sample taken was 100 people who were JD.id users. The data sources obtained in this research are primary data and secondary data. The data analysis carried out was calculating the Maturity Level of the Service Operation subdomain. The results of the research obtained the lowest value, namely the problem management variable with a value of 3.70, meaning that the JD.id marketplace is still not very optimal in terms of preventing incidents from occurring and there is no permanent improvement process and is not very optimal in terms of continuous service improvement. However, the overall maturity level (Maturity Level) on average is at level 4 with a score of 3.97 this means that the IT service processes in the JD.id marketplace have been planned and implemented well and consistently, but automation with the information technology tools used is limited.
PROSES REBENDING MENGGUNAKAN ROLL FORMING PADA PLAT SS 400/ JIS G3101 DI DALAM PEMBUATAN CORRUGATION STEEL PLATE MODEL 47J9-1C Bismantolo, Putra; Helmizar, Helmizar; Wiranto, Imam; Hoten, Hendri Van; Nurbaiti, Nurbaiti
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 1 (2020): April 2020
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v4i1.13276

Abstract

Roll Forming Machine adalah produk teknis yang mengintegrasikan teknologi mekanik. Mesin ini menggunakan teknologi canggih dan sangat meningkatkan efisiensi produk. Alat ini dapat secara otomatis melokalisasi, menjepit, menyesuaikan, mengeroll, mengangkut hingga menyelesaikan pekerjaan. Mode otomatis dari jalur ini sangat menghemat biaya pembuatan, dan mesin ini menggunakan metode bending Roll Forming. Metode ini adalah proses bending yang menggunakan Up Roller dan Driven Roller yang berputar menggulirkan plat sehingga terbentuklah profil dan kelengkungan benda kerja. Dari metode Roll Forming akan didapatkan hasil dengan radius yang masih cukup besar. Standar radius pada alat ini yaitu dengan ukuran 9000mm.Jika ingin memperkecil ukuran radius maka diperlukan proses pengulangan bending (Rebending). Dengan proses Rebending maka diperlukan lagi waktu untuk pengecilan ukuran radius yang diinginkan.Cepat lambatnya proses Rebending tergantung dari bebrapa langkah yang akan dilakukan dalam menurunkan radius yang diinginkan.dengan variasi jarak penurunan up roller 3mm dan 4mm tentu akan membuat waktu pengerjaan yang berbeda. Dari variasi jarak penurunan up roll tersebut menghasilkan kurva perbandingan pengerjaan waktu total. Jarak penurunan up roller 3mm meghasilkan waktu 16,01 menit sedangkan jarak penurunan up roller 4mm lebih cepat yaitu 13,59 menit.
MAINTENANCE KOMPRESOR SENTRIFUGAL CENTAX CC 700 MX 3HP Nurbaiti, Nurbaiti; Hoten, Hendri Van; Helmizar, Helmizar; Bismantolo, Putra; Sulistrionio, Sulistriono
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 2 (2020): Oktober 2020
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v4i2.18400

Abstract

PT. Pertamina (Persero) Refinery Unit III (RU III) is one of the Refinery Unit Pertamina that it main activity is process crude oil and intermediate product (Alkylfeed, HSDC,slop oil, LOMC, Long residue, Raw PP) into finished product. One of the important tools is Centrifugal Compressor (CENTAX CC 700 MX 3HP). The problem in the compressor is temperature of the fluida is increase but it pressure is decrease.To solve this problem, sandblasting and coating is used in inspection stage. The result from the inspection was compressor had a leak because the O ring was not functioning optimally and the surface was eroded To overcome this matter, coating is done to prevent the compressor surface from corrosion and replacing the O ring according to size.
Analisis Konsumsi Bahan Bakar Pada Alat Berat Volvo ADT A35C 45 Ditinjau Dari Pengaruh Kerusakan Nozzle Di PT Firman Ketaun TIMUR, RIZKY; BISMANTOLO, PUTRA
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 5 No. 1 (2021): April 2021
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v5i1.18612

Abstract

Analysis of Fuel Consumption in Volvo ADT A35C Heavy Equipment 45 In terms of the effect of nozzle damage at PT Firman Ketaun. One of the components contained in the Volvo ADT A35C 45, which affects the combustion system is the injector, the purpose of this study is to determine the factors that cause damage to the Volvo ADT A35C 45 nozzle on fuel consumption. This study uses an injector tester to check fuel fogging, then to calculate fuel consumption where data collection is carried out before the nozzle component is replaced and after the replacement is made. For good fogging of the nozzle components where changes have been made, the pressure is 260-270 bar but In the data from the results of the condensation process, it was found that at the lowest pressure on the old 4 nozzle test, where the pressure was 220-230 bar and bad fogging occurred thirst for the nozzle components, and the highest pressure was obtained in the old 6 nozzle test, where the holes were clogged due to crust on nozzle surface. From these data, it is also found that the difference in fuel consumption of 0.64 liters, multiplied by the length of time operating in ± 250 months (working hours) x Rp. 7,680.00 (costs saved per hour) is Rp1,920,000.00. If multiplied by one year / 12 months, the company will save IDR 23,040,000.00. Then if it is multiplied by the total Volvo ADT A35C units operating at pt Firman per year as many as ± 23 units, the company can save fuel consumption costs for one year, namely Rp.529,920,000.00
Maintenance on the Combustion Section Gas Turbine of Unit 2 Gas & Steam Power Plant PLTGU Prasetiyo, Rafi; Bismantolo, Putra; Suandi, Agus
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 5 No. 2 (2021): Oktober 2021
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v5i2.20174

Abstract

Gas and Steam Power Plant (PLTGU) is a power plant that utilizes heat from the exhaust gas turbine gas to produce steam which is used as the working fluid of the steam turbine. The components of the PLTGU need to be maintained regularly so that the components can work properly and reduce the risk of damage to these components. Maintenance is an activity carried out to prevent things that are not desirable, such as damage too quickly to the components at the plant. Maintenance of the gas turbine PLTGU shampooing unit is carried out on a time-based basis consisting of combustion inspection (CI), hot gas path inspection (HGPI), and major inspection (MI). Combustion inspection is carried out when the unit has been operating for 8,000 hours. From the results of the inspection carried out on the gas turbine unit of the PLTGU, it was found that several components of the combustion section were damaged. These components are fuel nozzle, cross fire, and combustion liner.
ANALISA PERFORMA KERJA STERILIZER OF CRUDE PALM OIL Abdul Latif Mubarok; A. Sofwan; Bismantolo, Putra
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 1 (2022): April 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v6i1.25455

Abstract

Boiling is one of the main factors that determine the success of the palm oil production process. Palm oil processing mills obtain Crude Palm Oil (CPO) through a boiling process at the sterilizer station to separate loose fruit and empty fruit, which will then be pressed into CPO. Boiling at the sterilizer station used is saturated steam with a pressure of 1.5-3 bar which is injected from the back pressure vessel (BPV). The selected boiling system is always adjusted to the ability to provide steam at the boiler station that produces steam. In this case, the supply of steam is considered sufficient, so that the boiling system used is the Triple Peak system, and the boiling time is ± 90 minutes.
ANALISA KOROSI PADA TANGKI REAKTOR TRIGA 2000 MENGGUNAKAN METODE INSPEKSI ULTRASONIK DAN INSPEKSI VISUAL (UNDERWATER CAMERA) Shafira; Hendri Hestiawan; Bismantolo, Putra
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 2 (2022): Oktober 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v6i2.25457

Abstract

A reactor is a process device where a reaction takes place, be it a chemical or nuclear reaction and not physically. Nuclear reactors are used for various purposes, namely to create, regulate, and maintain a nuclear chain reaction at a constant rate. One method of monitoring corrosion is using an ultrasonic device to measure the thickness of the tank wall and an underwater camera tool to visually see the damage that has occurred and will provide a quantitative estimate of the corrosion rate that occurs in the system by comparing the initial weight and weight after a certain time. The corrosion rate value on the TRIGA 2000 reactor wall is obtained through the weight reduction method, and has an average corrosion value of 0.10 mmpy, while the type of corrosion that occurs on the TRIGA 2000 reactor wall is the type of intergranular corrosion. protective coating by coating organic compounds (lubricant) and controlling humidity and temperature.
ANALISIS PERFORMANCE POMPA FEED SENTRIFUGAL Erwinsyah, Mochamad Dava Erwinsyah; Bismantolo, Putra; Witanto, Yovan
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 7 No. 1 (2023): April 2023
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v7i1.30103

Abstract

To support the optimization of operations at a refinery, a tool is urgently needed that can help process crude oil into a product. The centrifugal feed pump P-100/4 is a pump that operates in a distillation unit where the distillation unit functions to process oil from crude oil into products such as residue, diesel ph, diesel, kerosene, naptha and petrasol. The centrifugal feed pump P-100/4 aims to pump crude oil from tanks 101 and 102 to provide feed to furnace 5, before entering the crude oil furnace which is preheated in heat exchangers 1,2,3 to 4. The P-100/4 feed centrifugal pump is driven by a motor. In this paper more focused on the operation and maintenance of centrifugal pump P-100/4 feed. This data collection method is carried out by conducting interviews with field supervisors, and observing the pump unit directly, and other supporting books. The results obtained are: With a good and correct pump operator system and with capable and skilled operators, the pump operation will always be in good condition, and the life of the pump will be longer. The NPSHa value of the P. 100/4 mash pump meets the operating specifications, which is greater than the NPSHr. So the P.100/4 pump does not experience cavitation so the pump work is very stable. The efficiency price of the P. 100/4 feed pump is 68.40%
PROSES PRODUKSI KOMPONEN DUDUKAN WINCH KENDARAAN KHUSUS TAKTIS MAUNG 4X4 Sitinjak, Heryanto; Supardi, Nurul Iman; Bismantolo, Putra
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 7 No. 2 (2023): Oktober 2023
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v7i2.34058

Abstract

In accelerating production, the manufacturing process uses modern equipment such as machines and implements a structured program to carry out production. This study aims to determine the process of making winch mount components for Maung 4x4 special tactical vehicles. The manufacturing process begins with designing the product, determining the specifications of the material from which the product is made. After that, the raw material is modified through a manufacturing process to be formed into the required parts. To speed up and simplify the production process, a CNC (Computer Numerical Control) machine is used which works automatically according to the program made. To produce a desired product, of course, must go through several stages. In production the manufacturing process requires machining stages. This is because the desired product cannot be produced through only one machining process. Manufacturing steps, namely, making component designs, material verification (material verification) cutting processes, bending processes, and welding processes.
ANALISA ALIGNMENT SHAFT TURBIN GAS Ramadani, Dwi; Suryadi, Dedi; Bismantolo, Putra
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 1 (2024): April 2024
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v8i1.36548

Abstract

In the gas turbine system there is a section that functions as a place for combustion between a mixture of air and gas called the combustion section. The components of the alignment of the shaft need to be maintained regularly so that the resulting combustion is good. In the process of the turbine producing electrical energy there are many obstacles that occur which result in a reduction in the productivity of the turbine work, one of the causes is misalignment of the shaft. Misalignment on the shaft can be overcome by carrying out an alignment process which aims to make the shaft return to its initial position so that it is parallel to the other shaft. The alignment process is carried out to get the axial and radial values on the shaft which is then carried out by the adjusting process. The adjusting process is carried out so that the position of the shaft that is out of tolerance returns to the tolerance position and the work of the turbine can return to normal.
Co-Authors A. Sofwan Abdul Latif Mubarok Agus Suandi, Agus Arie Vatresia Dedi Suryadi Erwinsyah, Mochamad Dava Erwinsyah Helmizar Hendri Hestiawan Hendri van Hoten Kurnia Anggriani, Kurnia Nurbaiti Nurbaiti Nurul Iman Supardi Okta Piani, Sri Prasetiyo, Rafi Ramadani, Dwi Ramadhan, M. Fajar Shafira Sitinjak, Heryanto Sulistrionio, Sulistriono Tarigan, Daniel Elieser TIMUR, RIZKY Utama, Agus Bayu Utama, Ferzha Putra Wiranto, Imam Yovan Witanto Zuliantoni, Zuliantoni