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Mesin
Published by Institut Teknologi Bandung
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Core Subject : Engineering,
Mechanical Engineering
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Articles 6 Documents
 1 
Search results for , issue "Vol 29 No 1 (2023)" : 6 Documents clear
Perancangan Anticlimber sebagai Perangkat Crashworthiness untuk Kereta Penumpang Indonesia Rachman Setiawan; Faza Ahmad; Dodi Dodi; I Wayan Suweca
Mesin Vol 29 No 1 (2023)
Publisher : Faculty of Mechanical and Aerospace Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/MESIN.2023.29.1.5

Abstract

Anticlimber merupakan komponen pengaman untuk meningkatkan aspek crashworthiness, yang berfungsi khusus mencegah terjadinya fenomena overriding (tumpang tindih) saat tumburan kereta api yang dapat menyebabkan dampak jatuhnya korban jiwa yang signifikan. Sebagai rangkaian riset dan pengembangan untuk menerapkan teknologi crashworthiness pada kereta penumpang nasional, dikembangkan rancangan anticlimber yang sesuai dengan kereta penumpang produk industri nasional saat ini. Rancangan menggunakan konsep ribs terpisah yang dipasang pada kedua ujung kereta tepat di kanan dan kiri coupler. Anticlimber dirancanga sehingga dapat diintegrasikan dengan mudah tanpa terlalu lama mengganggu operasional KA, dan dapat diproduksi di dalam negeri dan tentunya efektif menahan gerakan vertikal (climbing) antar kereta. Analisis keefektifan rancangan anticlimber ini diuji dengan simulasi beban statik maupun beban dinamik berdasarkan kriteria standar internasional, yaitu BS EN 13227 yang dinilai paling lengkap mengatur aspek crashworthiness di perkeretaapian. Dari analisis kekuatan statik yang telah dilakukan, terbukti bahwa rancangan mampu menahan beban gaya longitudinal 60 tonf (177,6 kN) dan gaya angkat vertikal 12 tonf (588 kN) dan saat terjadi tumburan. Sedangkan dari simulasi dinamik pada kecepatan tumburan 10 m/s (36 km/jam), sesuai kriteria BS EN, dan kecepatan tinggi 20 m/s (72 km/jam), keberadaan anticlimber terbukti memenuhi standar dan mampu menurunkan kemungkinan terjadinya tumpang tindih, dibandingkan jika tanpa antilimber. Dengan hasil ini, dapat disimpulkan bahwa rancangan memiliki prospek yang baik untuk dikembangkan ke purwarupa dan pengujian lapangan, yang menjadi tahap berikutnya dari penelitian ini.
Study of Geometric Modification of Calciner in Cement Plant Prihadi Setyo Darmanto; Muhammad Isroffi
Mesin Vol 29 No 1 (2023)
Publisher : Faculty of Mechanical and Aerospace Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/MESIN.2023.29.1.1

Abstract

Suspension preheater is a raw mix pre-heating equipment used in a cement plant. The heat is used to raise raw mix temperature up to 800 0C -900 0C. The process results in an 80-90% degree of calcination. In this project, an increasing percentage of calcination in suspension preheater and reducing the load in the kiln is attempted, by including the calciner in suspension preheater. This project will focus on a suspension preheater system with a separate line calciner (SLC) at Cement Plant with 5000 ton per day (TPD) capacity. Calciner in existing conditions will be modified by extending its length by 2.5 m. Computational fluid dynamics (CFD) method was chosen to simulate the performance of the calciner. The results show that the alternative design can increases calcination percentage up to 76,32%, from the original value of 71%. The heat transfer on the alternative design also increases by 9%. As a result, the temperature output of the cyclone 5 also decreases, reducing the heat consumption. Another consequence of the alternative design is the possibility to increase the production capacity while maintaining the outlet temperature of cyclone 5, by increasing raw mix feeding without additional fuel consumption. Thus, clinker production can be increased by 8%.
Study of an Indirect Injection Diesel Engine Using Pure Coconut Oil, Pure Tamanu Oil and B-20 as Fuel for Smart Microgrid Applications. Part I: Laboratory Testing Iman Kartolaksono Reksowardojo; Aji Ardiansyah; Tobat Martin Leonardo; Dini Permatasari; Yuli Setyo Indartono; Fariza Almira Ghany
Mesin Vol 29 No 1 (2023)
Publisher : Faculty of Mechanical and Aerospace Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/MESIN.2023.29.1.2

Abstract

Smart Microgrid (SMG) is a hybrid system based on renewable energy which can use biofuel, taking advantage of local resources, as one of its energy sources. This study was conducted to determine the effect of using pure tamanu oil and pure coconut oil on engine performance, emissions, as well as their effects on particular components before and after endurance testing. The experiments were done using a diesel engine at speeds of 2200 rpm. In this study, engine performance and emission tests were done before and after the accelerated endurance tests, with loads of 800 W to 4000 W. The dimensions of the fuel injector nozzle needle and plunger pump were also measured. The fuel performance and emissions results showed slight differences between, before, and after endurance testing. The emissions tests also showed that the two biofuels, especially tamanu, are cleaner than B-20 and have better dimensional measurement results, compared to B-20. Therefore, these biofuels are feasible for replacing B-20, as shown in laboratory testing
Study of an Indirect Injection (IDI) Diesel Engine Using Pure Coconut Oil, Pure Tamanu Oil and B-20 for Smart Microgrid Applications Part II: Pilot Testing Iman Kartolaksono Reksowardojo; Aji Ardiansyah; Tobat Martin Leonardo; Dini Permatasari; Yuli Setyo Indartono; Fariza Almira Ghany
Mesin Vol 29 No 1 (2023)
Publisher : Faculty of Mechanical and Aerospace Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/MESIN.2023.29.1.3

Abstract

The Smart Microgrid (SMG) can be used as a solution to overcome problems with electrical distribution on remote islets. The SMG system allows for a combination of conventional and renewable energy for power generation. Biofuel was chosen as a renewable energy source because of its abundant availability and ease of mobilization. This study examined the performance of B-20, Pure Tamanu Oil (PTO), and Pure Coconut Oil (PCO) in an IDI diesel engine that acts as a backup for SMG systems in the Karimunjawa Islands. The entire SMG system consists of: diesel engine, stabilizer, inverter, PV, batteries, ice maker, and a channel to the electrical grid. The results show that PTO has the highest value of thermal efficiency, that of 17.38%, but with a higher BSFC of 0.54 kg/kWh when compared to B-20 usage (14.69% and 0.51 kg/kWh). According to performance test results, their performance can be compared to the first part of this twin paper, which is laboratory testing, with a range of 2400-3200 W loads. Therefore, it can be said that biofuels are feasible for replacing B-20, as shown in pilot testing.
Kajian Material Komposit Sandwich pada Floor Panel Pesawat Terbang Muhammad Labib Adyavit; Larasati Irischa Ramadhani; Mardiyati Mardiyati; Steven Steven
Mesin Vol 29 No 1 (2023)
Publisher : Faculty of Mechanical and Aerospace Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/MESIN.2023.29.1.4

Abstract

Sandwich composites have been used as lightweight materials in aircraft manufacturing for a long time, from balsa wood sandwich in the 1930s to honeycomb and fiber-reinforced polymers sandwich. Its characteristics are considered as a 'perfect' material for aircraft, which has high strength with low density. Sandwich composites are the common materials for aircraft floor panels. The core is usually made of Nomex or aluminum honeycomb, while the skin is made of 1 "“ 2 ply of carbon/glass fiber in epoxy resin composite. The core is usually constructed using the corrugating or expansion method, whilst the skins are usually constructed using the prepreg lay-up method. Both materials are combined together by a simple adhesive bonding. Being the most strictly regulated transportation method on the planet, floor panel manufacturers must abide by aircraft manufacturing companies and local aviation authority standards and specifications to ensure the product's safety. The purpose of this study is to determine the most used materials for aircraft floor panels and why is it widely used, to understand the manufacturing process, and to know the specifications and standards that need to be fulfilled.
Kajian Penggunaan Baja Tahan Karat 316L sebagai Implan Sendi Panggul Muhammad Aldy Hassan; Luhadi Satriawan; Jhonsen Taharuddin; Mardiyati Mardiyati; Steven Steven
Mesin Vol 29 No 1 (2023)
Publisher : Faculty of Mechanical and Aerospace Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/MESIN.2023.29.1.6

Abstract

Implant is one of the most important innovations in medical devices to help people with disabilities or injuries, one of them is the hip-joint implant. The hip-joint implant must-have properties such as good corrosion resistance, good biocompatibility, and good wear resistance. These properties are important for maintaining safety during surgery and future use. Nickel-free 316L stainless steel is one of the materials that is commonly used as implants and meets all the requirements for a material to be used as an implant. 316L stainless steel also has an advantage, a lower price than titanium and cobalt. However, 316L stainless steel has low wear resistance and needs to be coated in order to improve its wear resistance. Recent research reported that the metallic glass FeCrMoCB was able to cover cronidur30 and improved its wear resistance. This study discussed the properties of 316L stainless steel implants, the testing process, the manufacturing process, and the sustainability aspects of the manufacturing process. 

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