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Hamdan Akbar Notonegoro
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FLYWHEEL : Jurnal Teknik Mesin Untirta
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 24077852     EISSN : 25977083     DOI : https://doi.org/10.36055/fwl.v0i0.
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
The journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 222 Documents
 10   11   12   13   14 
The Effect of Temperature and Time of Gasification Process and The Addition of Catalyst to The Composition of The Combustible Gas from The Wastes of Tobacco Leaves With Gasifier Updraft Fatah Sulaiman; Endang Suhendi; Nindya Prastuti; Okta Abdul Choir
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume V Nomor 1, April 2019
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.4821

Abstract

The increasing industrial production is causing more of energy consumption needed. Tobacco leaves are waste from cigarette production that can be use as alternative biomass energy  to solve the problems of the energy crisis in the near future. Gasification is the conversion of solid carbon raw materials from biomass by the partial oxidation to be combustible gas (CO, H2, and CH4) as an energy source. This research uses the fixed-bed reactor with capacity of 300 grams by the flow of updraft and raw material of waste tobacco leaves that have a size -14 + 18 mesh. The influence of temperature was research on 700 oC, 800 oC, and 900 oC with the reaction time for 20 minutes and the addition of a catalyst K2CO3. gasification medium used air and steam with the constant flow rate 0.504 m3/hour air and 0.0555 kg/minutes steam. Step of the process with the preparation of raw materials, the gasification process, and analysis of gas products. The result of the gasification process analysed using the gas chromatography, and the best results were obtained on the temperature 700 oC in the process time for 10 minutes produced combustible gas are CO = 22.82 % v, H2 =  26.82 % v, CH4 = 7.09 % v. increasing production gas happened when a catalyst K2CO3 is added, the producting  of combustible gasses are CO = 52.76 % v, H2 = 23.46 % v, CH4, = 3.23 % v
Produksi Hidrogen Melalui Reaksi Hasil Canai Dingin Paduan Al-Sn-Zn Dengan Larutan NaOH Ali Alhamidi; Esky Yanurdin; M Fitrulloh
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume V Nomor 1, April 2019
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.4823

Abstract

Hidrogen merupakan salah satu dari energi terbarukan yang banyak dikembagkan sekarang ini, karena jumlahnya yang melimpah dialam dan ramah lingkungan. Reaksi hidrolisis antara aluminium (Al) dengan air murni dapat menghasilkan gas hidrogen. Namun, lapisan passive pada permukaan Al menghalangi jalannya reaksi. Penelitian ini bertujuan untuk mengetahui pengaruh salah salah satu unsur seperti timah (Sn) dan seng (Zn) terhadap reaksi hidrolisis pada larutan NaOH serta penambahan deformasi canai dingin pada paduan Al–Sn–Zn yang diharapkan mampu melindungi dan merusak lapisan passive pada Al. Pada penelitian ini, sampel dibuat dengan memadukan Al dengan Sn dan Zn dengan teknik pengecoran pada paduan Al-3Sn-Zn (wt.%) dengan variasi komposisi Zn (wt.%): 0%; 2%; 4% dan 6% serta paduan Al–Sn–3Zn (wt.%): dengan variasi komposisi Sn (wt.%): 0%; 2%; 4% dan 6%. Paduan kemudian dilakukan homogenisasi selama 24 jam. Sampel dilakukan canai dingin dengan reduksi sebesar 60%. Reaksi hidrolisis paduan dilakukan dengan larutan NaOH 0,9 M. Hasil menunjukan bahwa produksi volume hidrogen yang didapat sangat rendah dengan konversi efisiensi (%) terbesar yaitu 3,3 % pada sampel paduan 91 Al–3Sn–6 Zn (wt.%) dan terendah pada sampel paduan 97Al–0Sn–3 Zn (wt.%) yaitu sebesar 1,08%. Hasil analisa XRD pada sampel paduan sebelum reaksi menunjukan bahwa tidak terbentuk fasa intermetalik dan hanya terbentuk fasa tunggal Al dan Sn, kemudian setelah sampel direaksikan dengan larutan NaOH 0,9 M terbentuk senyawa Al(OH)3 dan AlOOH yang mempengaruhi laju reaksi hidrolisis paduan Al–Sn–Zn.
Fitness For Service Assessment of Bulged Sewage Tank kasda kasda; Hari Din Nugraha; Rachman Setiawan
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 2, October 2020
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.9142

Abstract

Based on the visual inspection and measurement, bulging was found on the Sewage Tank. There are cracks found in some areas of welded joint on the tank wall. The suitable recommendation needs to be found in order the equipment to be operated safely and reliably. The finite element simulation is aimed at estimating the loading experienced by the tank prior to the damage, and providing recommendation for repair,  replacement or other suitable options. In order to estimate the cause of bulging, several  steps have been carried out. The sewage tank is modelled using a finite-element based software, under a normal up to the maximum allowable loading condition, using a linear-static analysis. Based on finite element simulation, under normal loading  of 0.15 bar with 6 mm thickness, the tank is considered safe with a safety factor is 2.87, compared with a minimum specified Yield Strength of material of 267 MPa. Whereas, under the high loading of 0.4 bar, the safety factor drops to 1.50. Due to estimated loading case that caused the permanent deformation, some of the tank walls experience tensile residual stress. This condition is considered unsafe. Therefore, removal of the residual stress is required.
Gas Hidrogen Pada Proses Elektrolisis Terhadap Emisi Dan Konsumsi Bahan Bakar yudi, yudi; Salam, Fajrus
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume IV Nomor 1, April 2018
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.3216

Abstract

Meningkatnya  penggunaan  kendaraan  sepada  motor  maka  terjadi peningkatan polusi udara yang disebabkan oleh hasil pembakaran yang akan berdampak pada kesehatan. Emisi gas buang merupakan gas beracun yang dikeluarkan oleh kendaraan bermotor, dengan itu perlu adanya penurunan emisi gas buang dengan menggunakan zat tambahan yang dihasilkan dari proses elektrolisis dan akan menghasilkan gas hidrogen. Tujuan dari penelitian ini adalah mengetahui pengaruh penambahan gas hidrogen hasil dari proses elektrolisis air dengan campuran natrium hidogsida tehadap bahan bakar premium.Pada penelitian ini proses elektrolisis air ditambahkan katalis natrium hidrogsida dengan variasi 10 gram (OB1), 20 gram, (OB2) dan 30 gram(OB3). Kemudian prosedur pengujian dibagi menjadi dua tahap yaitu uji emisi gas buang dan uji konsumsi bahan bakar, pengujian konsumsi bahan bakar dengan jarak 1,4 km pada setiap putaran mesin 1500 rpm, 2000 rpm, 2500 rpm.Hasil penelitian di dapat dengan penambahan gas hidrogen hasil elektrolisis air terhadap kendaraan sepeda motor dengan variasi campuran air dengan NaOH memberi pengaruh terhadap emisi gas buang kendaraan. Penambahan gas hidrogen beserta campuran NaOH akan membuat bahan bakar premium semakin irit. Semakin tinggi campuran NaOH maka gas hidrogen yang dihasilkan semakin banyak dan emisi semakin berkurang.
THE APPLICATION OF VIBRATION SYSTEM on DRYER MACHINE to DRY RDF and AGRICULTURAL PRODUCTS by using GREEN INCINERATOR La Ode M. Firman
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume V Nomor 1, April 2019
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.4588

Abstract

Increasing heat and vapor transfer between air and product to be dried is an important issue in drying of Refuse Derived Fuel (RDF) and agricultural products.  Generally, manual mixing is used in order to increase the contact area between air and product to be dried. The applications of vibration system on dryer machine can be used to dry RDF and agricultural products. Even if the use of dryer machines has been widely used to dry RDF and agricultural products with avoiding the heat loss needs to be verified. The observations shown that the using of vibration system for moving RDF and agricultural products were on the shelf could not be moved optimally. The previous study found that the spring load on dryer machine was too large and most of the surface of RDF and agricultural products were on the shelf could not get hot air flow. That’s why the spring used as pedestal of shelves would be broken fast and on a specific moment RDF and agricultural products must be taken out of the drying chamber to be manually moved. To solve the problems and to develop the results of previous study, then it needs to do the study about analysis, simulation and experimental of vibration. In this study, vibration was analyzed to having an insight on suitable condition of the dryer machine for use in drying RDF and agricultural products.  Beside that the study only uses an unbalance mass and it does not use a piston engine, so spring load would be smaller. The objectives of the study is to perform analysis, simulation and experimental of vibration in order that the RDF and agricultural products are on the each shelf can be dried fast and moved optimally. The study use observation, literature study, analysis, simulation and experimental methods and cashew nuts as the material tested on the each shelf. The study results show that the condition of vibration approached resonance cause cashew nuts placed on the each shelf could be moved optimally, therefore the surface of RDF and agricultural products were on the shelf could get hot air flow. The final moisture content of vibrated samples was lower than the samples without vibration.
Partial Discharge of Polyurethane/ Organoclay Composite Coated on Aluminum Conductor Overhead Lines Bambang Soegijono; Ova Kurniawan; Hamdan Akbar Notonegoro; Arief Syarifuddin Fitrianto
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 2, October 2020
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.9233

Abstract

Aluminum conductor have been used worldwide as the primary conductive materials for high voltage electrical transmission lines. The partial discharge behavior of the aluminum conductor have been obeserved during operation due to the transmission line's performance to serve electricity. The partial discharge of aluminum alloy coated by polyurethane/organoclay (PClay) composite material was studied. PClay composites were prepared by adding organoclay with different content in polyurethane as a matrix then coated on an aluminum conductor sample. A partial discharge test was conducted to obtain the behavior of partial discharge versus voltage. It was found that an escalation of organoclay content in the polyurethane reduce partial discharge appears.
GAS HIDROGEN PADA PROSES ELEKTROLISIS TERHADAP EMISI DAN KONSUMSI BAHAN BAKAR Yudi Setiawan; Fajrus Salam
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume IV Nomor 1, April 2018
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.3350

Abstract

Meningkatnya  penggunaan  kendaraan  sepada  motor  maka  terjadi peningkatan polusi udara yang disebabkan oleh hasil pembakaran yang akan berdampak pada kesehatan. Emisi gas buang merupakan gas beracun yang dikeluarkan oleh kendaraan bermotor, dengan itu perlu adanya penurunan emisi gas buang dengan menggunakan zat tambahan yang dihasilkan dari proses elektrolisis dan akan menghasilkan gas hidrogen. Tujuan dari penelitian ini adalah mengetahui pengaruh penambahan gas hidrogen hasil dari proses elektrolisis air dengan campuran natrium hidogsida tehadap bahan bakar premium.Pada penelitian ini proses elektrolisis air ditambahkan katalis natrium hidrogsida dengan variasi 10 gram (OB1), 20 gram, (OB2) dan 30 gram(OB3). Kemudian prosedur pengujian dibagi menjadi dua tahap yaitu uji emisi gas buang dan uji konsumsi bahan bakar, pengujian konsumsi bahan bakar dengan jarak 1,4 km pada setiap putaran mesin 1500 rpm, 2000 rpm, 2500 rpm.Hasil penelitian di dapat dengan penambahan gas hidrogen hasil elektrolisis air terhadap kendaraan sepeda motor dengan variasi campuran air dengan NaOH memberi pengaruh terhadap emisi gas buang kendaraan. Penambahan gas hidrogen beserta campuran NaOH akan membuat bahan bakar premium semakin irit. Semakin tinggi campuran NaOH maka gas hidrogen yang dihasilkan semakin banyak dan emisi semakin berkurang
PERANCANGAN SEPEDA STATIS PENGHASIL ENERGI LISTRIK YANG ERGONOMIS Suwandi, Agri; Maulana, Eka; Rhapsody, Febrian Dio
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume III Nomor 2, Oktober 2017
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v2i1.2304

Abstract

Kebutuhan akan energi listrik di Indonesia saat ini sebesar 55.000 MW, sementara energi listrik yang mampu disuplai oleh pemerintah sebesar 32.000 MW dan sisanya disuplai oleh perusahaan swasta. Pemenuhan kebutuhan energi listrik oleh pemerintah tersebut masih banyak mengalami kendala, maka dibutuhkan sumber energi listrik baru yang ramah lingkungan. Proses perancangan sepeda statis penghasil energi listrik yang ergonomis menggunakan kombinasi metode perancangan, yaitu: Quality Function Deployment (QFD) dan Pahl and Beitz. Hal terpenting dari metode QFD adalah matriks House of Quality (HoQ) yang merupakan konversi dari kebutuhan pelanggan secara langsung terhadap spesifikasi teknis produk yang akan dihasilkan. Sepeda statis penghasil energi listrik merupakan salah satu cara dalam menghasilkan sumber energi listrik baru yang ramah lingkungan. Energi listrik yang dihasilkan oleh sepeda statis ini disimpan ke dalam aki kering yang dimanfaatkan kemudian sebagai energi listrik untuk penerangan rumah. Berdasarkan hasil HoQ dan seleksi konsep diperoleh dimensi rancangan sepeda dengan panjang 1632,6 mm, lebar 569,5 mm dan tinggi 1315 mm. Sedangkan hasil perhitungan energi yang dilakukan, bahwa energi listrik yang tersimpan dalam aki kering dengan kapasitas 120 Ah digunakan untuk penerangan rumah selama ±10 jam dengan syarat penggunaan tiga buah lampu LED 7 Watt dan dua buah lampu LED 5 Watt.
Measurement of Geometric And Functional Accuracy With ISO 1710 Standard on Feasibility of Welding Bending Test Equipment Hardi Arya Pratama
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 2, October 2020
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.9013

Abstract

The bending test tool is a machine used for the bending strength testing process to determine the mechanical properties of metal materials and welded joints. Therefore a machine needs to have machine elements with ideal functional and geometric characteristics. The frame, hydraulics, and specimen mounts are examples of important machine elements in bending test machines. The ISO 1710 standard which is applied in functional and geometric testing of bending test equipment is expected to help analyze the test so that the bending test tool becomes more accurate the test results. The expected accurate category is the size, shape, and pressure applied to the specimen as desired. The accuracy of bending test equipment performance is very important in the manufacturing process to produce high-quality products. Testing includes functional on the frame by comparing actual dimensions and design, welding strength by comparing manual calculations and actual welding tests, and testing cylinder strength by comparing manual calculation of cylinder selection with the actual operation of cylinders on bending test equipment, and geometric testing, namely measuring flatness with deviations. permissible straightness 0.02mm per 1000mm, straightness with an allowable deviation of 0.025mm per 300mm and straightness 85 ° -90 ° in welded joint bending test equipment. The geometrical test results of flatness measurement at datum A using a waterpass are stated not to exceed the permitted limits with a flatness result of 0 °, the alignment test of the frame against datum A using a waterpass is still in accordance with the allowable deviation limits with the test results of the right side 89.7 ° and the left side 89.8 °, the test the alignment of the cylinder with the dial gauge is stated to be still in accordance with the permissible deviation with the results of the X-axis 0 mm and Y-axis 0 mm. measuring ruler with the results of each predetermined measurement point is 800 mm, geometric deviations were found on the flatness test of the specimen jig holder in the longitudinal and transverse directions, namely 0.2 ° or 0.88 mm on the backside of the stand or the third measurement, this is probably due to because the thickness of the diameter welded mount, it is highly recommended to re-weld so that the test results are in accordance with the permitted deviation. The results of the functional testing of the bending test equipment are stated to be able to carry out tests with an accuracy of 95-99% with details of the comparison of the dimensions of the frame with the actual test, the functional testing of the frame based on the strength of the welding and the functional testing of the cylinder is still below the allowable limit.
Analisa Gaya Tekan dan Delaminasi pada Penggurdian KFRP Komposit Mohammad Muslimin Ilham; Am Mufarrih
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume IV Nomor 2, Oktober 2018
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v2i1.3721

Abstract

Penggurdian merupakan proses pemesinan yang terpenting di bidang industri otomotif dan manufaktur. Kinerja dari penggurdian pada material KFRP komposit bisa diukur dengan karakteristik kualitas seperti kekasaran permukaan, burr height, kebulatan, konsumsi daya, gaya tekan dan delaminasi. Penelitian ini bertujuan untuk mengetahui pengaruh variasi variabel proses penggurdian terhadap respon gaya tekan dan delaminasi. Rancangan percobaan menggunakan metode faktorial yang berupa orthogonal array L9 dengan replikasi sebanyak tiga kali. Variabel proses penggurdian yang divariasikan adalah sudut ujung pahat (100°, 118°, 140°) dan kecepatan makan (50 mm/menit, 115 mm/menit dan 180 mm/menit). Variabel respon yang diamati adalah gaya tekan dan delaminasi. Pahat yang digunakan adalah twist drill HSS Nachi. ANOVA digunakan untuk mengetahui variabel-variabel proses yang memiliki pengaruh signifikan terhadap variabel respon yang diamati. Hasil penelitian menunjukkan bahwa sudut ujung pahat dan kecepatan makan berpengaruh signifikan terhadap respon gaya tekan dan delaminasi. Peningkatan sudut ujung pahat akan meningkatkan gaya tekan dan delaminasi. Begitu pula peningkatan kecepatan makan juga akan meningkatkan gaya tekan dan delaminasi.

Page 12 of 23 | Total Record : 222

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