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Jurnal Teknik Mesin Indonesia

jtmi
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Published by Badan Kerja Sama Teknik Mesin

ISSN : 1907350X EISSN : 25977563 DOI : -

Aerospace Engineering Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering

Jurnal Teknik Mesin Indonesia “JTMI” " adalah jurnal ilmiah sains dan teknologi yang diterbitkan oleh Badan Kerjasama Teknik Mesin Indonesia. JTMI meliputi bidang konversi energi, material, desain mekanikal, manufaktur dan otomasi

Arjuna Subject : Teknik (semua kategori) - Teknik Mesin

Articles 217 Documents

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Analisa pemakaian energi listrik dan cop pada AC split 900 watt menggunakan refrigeran hidrokarbon MC-22 dan R-22 Harsono .; Bambang Santosa
Jurnal Teknik Mesin Indonesia Vol 12 No 1 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

To know the efficiency of work one AC equipment needs to know electricenergy consumption , the effect of performance and those obtained fromrefrigeration and ( cop ) .Most air conditioning system synthetic / ac wearinga refrigerant .The use of synthetic a refrigerant were forbidden to thegovernment of the republic of indonesia no. 1 according to the decisionmenperindag 79/mpp /kep/12 /2002 because they include ozone as depletingsubstance ( ods ) , That is a substance that can result in damage to the ozonelayer , in addition to the still have the potential as the substance which cancause the effects of global warming because it has global warming potentialgwp ( ) that is significant .On this thesis a refrigerant kept on a constantreview the use of environmentally friendly , namely a refrigerant musicoolhydrocarbon / 22 r-22 mc-22 as a substitute for .A refrigerant mc-22compatible with air conditioner use r-22 components .From the research acsplit by using r-22 , electric power usage 726 watts , the effect ofrefrigeration 149.07 kj / kg and cop 4.9 .Then maybe you an use mc-22 653wat electricity power usage.

Pengaruh pack carburizing media arang tempurung kelapa terhadap ketahanan aus baja komersial dengan variasi pelumas.pdf Wahyu Richard Nugraha; Muhammad Iqbal; Sri Chandrabakty
Jurnal Teknik Mesin Indonesia Vol 13 No 1 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Penelitian ini dilakukan untuk mengetahui pengaruh pack carburizing media arang tempurung terhadap ketahanan aus baja komersial dengan variasi pelumas. Media karbon yang digunakan yaitu arang tempurung kelapa. Proses pack carburizing dilakukan pada temperatur 950oC dengan quenching media air dan tempering dengan suhu 200oC, setelah proses pack carburizing kemudian dilakukan pengujian keausan dengan variasi pelumas SAE 40, SAE 90, SAE 140 dan juga tanpa pelumas (TP). Laju keausan pada spesimen yang mengalami proses pack carburizing untuk pengujian SAE 40 dan SAE 90 sebesar 0,08% dengan faktor keausan sebesar 0,00193 mm3/N.km dan 0,00202 mm3/N.km, kemudian untuk pengujian SAE 140 laju keausan sebesar 0,05% dan faktor keausan sebesar 0,00128 mm3/N.km, serta untuk pengujian tanpa pelumas (TP) sebesar 0,31% dan faktor keausan sebesar 0,00807 mm3/N.km. Sedangkan pengujian raw material pada pengujian SAE 40 laju keausan dan faktor keausan sebesar 0,19% dan 0,00504 mm3/N.km, untuk hasil pengujian SAE 90 sebesar 0,21% dan 0,00541 mm3/N.km, serta hasil laju keausan pengujian SAE 140 sebesar 0,0,18% dengan faktor keausan sebesar 0,00459 mm3/N.km kemudian pengujian tanpa pelumas (TP) sebesar 3,59% dengan faktor keausan sebesar 0,09537 mm3/N.km

Analisa pengaruh variasi kuat arus, media pendingin, dan merk elektroda terhadap kekuatan tarik dan distorsi sudut sambungan baja st 37 Hesti Istiqlaliyah; Am Mufarrih
Jurnal Teknik Mesin Indonesia Vol 11 No 1 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

The purpose of this research is to know the influence of variation of current strength, cooling medium, and brand of electrode to tensile strength and distortion connection angle of st 37. SMAW welding using E6013 electrode having 2 mm diameter. The test specimens use st 37 plate with a thickness of 5 mm. Furthermore, distortion testing and tensile tests were performed. In determining the result of the variance of tensile strength and distortion, the experimental design of the Taguchi method is used. The tensile strength response characteristic is the larger is better, while the distortion response characteristics are the smaller is better. The results showed that the optimum condition for tensile strength was a factor of A strong current at level 2 of 65 ampere, C brand factor electrode at level 2 using brand RB electrode, while cooling factor B at level 2 using water type refrigerant. While the optimum condition for the distortion response of factor B cooler with level 2 using air conditioner, brand C factor electrode using RB brand electrode, and factor A strong current level 2 using 65 ampere. Based on ANOVA, the two responses of these three factors have no significant effect on the response.

Design of heat exchanger for cooling fluid used on magnetic induction welder Ekadewi A Handoyo; Lita Puspitasari
Jurnal Teknik Mesin Indonesia Vol 14 No 1 (2019): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Magnetic induction welding is a common process in pipe production. The impeder used in the welding machine needs to be cooled to maintain its temperature below 35oC. The cooling fluid is water with 2% cutting oil and called coolant. It should enter the impeder at 15oC. The required flow rate is as much as 30 lt/min. To ensure the impederâ€™s temperature be kept lower than required temperature, then the heat exchanger shall be designed to cool the coolant from 40oC to 15oC. Air-cooled water chiller type UWAP750AY3 is used to produce chilled water needed by the heat exchanger. The 5/8-inch-finned-copper pipes are used as tubes in the heat exchanger. The coolant is divided in four equally tubes from a header. To meet the heat transfer area needed, each tubes will be bent to make 10 passes (or rows). At the end of the last row, four flow will be gathered in a header. Then, the coolant will circulate to impeder with the required temperature. Numerical simulation was conducted to get the velocity vector and temperature distribution of flow inside the tube, and also the pressure drop of the flow across the tubes and header. Velocity vector of flow around return bend, flow in entrance and exit are interesting. They give understanding that the pressure drop will be higher in such accessories than in straight pipe. The pressure drop of coolant flowing inside tubes of heat exchanger is 5143.2 Pa from analytical solutions and 4611.4 Pa from numerical simulation using Fluent. Temperature of coolant at outlet got from numerical simulation is almost the same with the designed temperature, i.e. 15oC. So, the numerical simulation reinforces the design of the heat exchanger.

Performansi aktual modul photovoltaik dengan pengarah matahari Jalaluddin .; Baharuddin Mire
Jurnal Teknik Mesin Indonesia Vol 12 No 2 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Actual performance of photovoltaic module with solar tracking is presented. Solar radiation can be converted into electrical energy using photovoltaic (PV) modules. Performance of polycristalline silicon PV modules with and without solar tracking are investigated experimentally. The PV module with dimension 698 x 518 x 25 mm has maximum power and voltage is 45 Watt and 18 Volt respectively. Based on the experiment data, it is concluded that the performance of PV module with solar tracking increases in the morning and afternoon compared with that of fixed PV module. It increases about 18 % in the morning from 10:00 to 12:00 and in the afternoon from 13:30 to 14:00 (local time). This study also shows the daily performance characteristic of the two PV modules. Using PV module with solar tracking provides a better performance than fixed PV module.

Pengaruh geometri penampang kampas rem cakram terhadap getaran dan indikasi squeal yang muncul saat pengereman pada molina uns Rifai Prima Alazhar; Didik Djoko S; Eko Prasetyo Budiana
Jurnal Teknik Mesin Indonesia Vol 11 No 1 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Mechanical Engineering Department of Sebelas Maret University participated on the development of a national electric car (Molina UNS). One of the main components of this car is the brake system. Molina UNS use disc brakes type for all wheels. In this brake type, squeal can arise in the form of disturbance. Therefore, this study aims to determine the dynamic characteristic of disc brake during braking and the effect of brake lining cross-section geometry to brake squeal occurrence. Analysis were performed with the finite element simulation using ANSYS 14.5 software. The pressure of 0,6 MPa is given on lining, disc rotation at 5 rad/s, and friction coefficient is 0,405. Geometry variation of this simulation are brake lining without slot, single slot, double slot, and chamfered. Eigenvalues of simulation results extracted on the frequency between 0 and 13 kHz. The results show the unstable vibration mode that potentially squeal on the configuration I, II, III, IV sequentially occurs at frequencies 8769 Hz, 8713 Hz, 11737 Hz and 11460 Hz. Most of the unstable vibration modes became twisting and bending moment on the lining. Brake lining with chamfered configuration has the smallest squeal potential.

Analisa botol plastik yang dapat digunakan sebagai bata penyusun bangunan dengan metode elemen hingga Muhammad Ikhsan; Muhammad Iqbal Mudzakky; Daniel Dwi Putra Wibowo
Jurnal Teknik Mesin Indonesia Vol 14 No 1 (2019): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v14i1.108

In this paper, writers create a new design of reusable plastic bottle, which can reuse as building bricks called Rubicks v. 2.1 with some upgrade of the design that can reinforce static strength when the body of bottle applied by a force. The purpose of this research are to find and to analyze the magnitude of force that can make the design of bottle will be fail or damage. The method that used in this paper is Finite Element Method (FEM). In this paper, the bottle given ten of variation magnitude of forces from 200 N to 2000 N. The result and analyze that the lowest total deformation value is 0.22 mm and the highest total deformation value is 2.25 mm. For Maximum Shear Stress, the lowest maximum shear stress is when the bottle applied 200 N each is 3.66 MPa. Meanwhile, the highest maximum shear stress is when the bottle is applied 2000 N each is 36.65 MPa. The most effective of safety factor is chosen when the bottle have a value of safety factor equal or more than 1. The magnitude of force that can applied on the Rubicks v. 2.1 plastic bottle design is 1700 N.

Analisa dynamics of handling kendaraan reverse trike ditinjau dari pergeseran centre of gravity (cg) Bhanu Putra Bumi; Wibowo .; Raymundus Lullus Lambang G
Jurnal Teknik Mesin Indonesia Vol 12 No 2 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

The purpose of this research is to get the dynamics behavior of the Reverse Trike vehicle handling based on testing and calculation analysis using Newton's first law principle. Reverse Trike has a length of Wheelbase (L) 1.14 m, Trackwidth width (tf) 0.81 m, front wheel suspension (bf), and Ground Clearance 0.11 m. Testing starts from vehicle weighing to get the average weight of the front wheel (Wf), rear wheel weight (Wr), and total vehicle weight (Wt). Then do U-Turn maneuver testing with variations in speed from 20 km / h to 50 km / hour. Calculation analysis is done by considering the Load Transfer that occurs on the vehicle that is doing the maneuver. Braking results in rolling moments, centrifugal force due to vehicle maneuver resulting in pitching moments, and vehicle acceleration results in a drag force. The results showed that Reverse Trike vehicle design experienced Oversteer behavior when performing maneuver motion. This is indicated by the value of Index Understeer (Kus). The average value of Kus at 20 km/h speed is -4.33. At 30 km/h speed is -2.68. At 40 km/h speed is -2.04. And at 50 km/h speed is -1.58.

Pengaruh laju aliran coolant campuran air dengan ethylene glycol terhadap laju perpindahan panas dan penurunan tekanan radiator otomotif Bernadus Nanang Dwi Nuryanto; Tri Istanto; Wibawa Endra Juwana
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

This experimental study was conducted to examine the heat transfer rate and pressure drop on corrugated louver fin with triangular channel radiator. Radiator tube and fin were made of aluminium. Cold fluid flows verticaly from top side to bottom while air flows horizontaly (crossflow heat exchanger). Water and 20% Ethylene glycol were used as hot fluid (coolant) and maintained at constant temperature of 80 oC and varied at flow rate of 25 lpm, 30 lpm, 35 lpm, dan 40 lpm. Where as air was used as cold fluid having its velocity varied at 1.5 m/s, 2 m/s, 2,5 m/s and 3 m/s. And air intake temperature was maintained around 30 oC. The result shows the higher water flow rate in the radiator tube, resulting in higher value of heat transfer rate, and coolant pressure drop. Ethylene glycol mixing composition into the coolant, affects on decreasing the heat transfer rate. The highest heat transfer rate enhancement was obtained at water coolant usage. Ethylene glycol mixing affects the increasing coolant-side pressure drop.

Inovasi Desain dan Simulasi Model Prostesis Bawah Lutut Berdasarkan Antropometri Orang Indonesia Donny Suryawan; Muhammad Ridlwan; Ari Setiadi
Jurnal Teknik Mesin Indonesia Vol 14 No 1 (2019): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Data kesehatan tahun 2012 menunjukkan bahwa 2,45 % dari jumlah penduduk Indonesia merupakan penyandang disabilitas. Penderita tuna daksa menempati posisi kedua setelah gangguan pada penglihatan. Amputasi bawah lutut adalah salah satu bentuk tuna daksa yang banyak terjadi di Indonesia. Pasien amputasi bawah lutut akan kesulitan berjalan karena ketiadaan organ akibat amputasi. Prostesis bawah lutut merupakan alat pengganti organ bawah lutut. Prostesis bawah lutut akan membantu penderita amputasi bawah lutut agar dapat berdiri dan berjalan. Saat ini, produk prostesis bawah lutut yang ada di Indonesia masih memiliki banyak kekurangan. Pembuatan prostesis masih menggunakan metode custom sehingga membutuhkan proses pembuatan yang lama dan harga yang relatif mahal. Produksi massal tentu dapat menjadi solusi untuk menekan harga dan waktu pembuatan. Desain prostesis bawah lutut yang dapat mengakomodasi rentang antropometri orang Indonesia diperlukan agar prostesis bawah lutut dapat diproduksi secara massal. Hasil pembuatan desain kemudian diuji melalui simulasi sesuai standar ISO 10328 sebelum pembuatan prototipe dan produksi. Prostesis bawah lutut tersebut dirancang untuk mampu menahan beban 100 kg dengan safety factor 4. Selain itu, prostesis bawah lutut yang telah dirancang dapat digunakan untuk penderita yang memiliki rentang tinggi badan antara 150 cm hingga 180 cm.

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