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R.E.M (Rekyasa Energi Manufaktur) Jurnal
Published by Universitas Muhammadiyah Sidoarjo
ISSN : 25275674     EISSN : 25283723     DOI : https://doi.org/10.21070/r.e.m
Core Subject : Engineering,
Engineering
Focus and Scope Aim: to facilitate scholar, researchers, and teachers for publishing the original articles of review articles. Scope: Mechanical Engineering include: Energy Conversion Renewable Energy Manufacturing Materials and Design Engineering Mechatronics
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 155 Documents
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Kajian Eksperimental Koefisien Redaman Akustik Bahan Pelapis Plat Dek Kapal Wibowo Harso Nugroho; Nanang J H Purnomo; Hardi Zen; Andi Rahmadiansah
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 3 No 1 (2018): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v3i1.1511

Abstract

With the increasingly strict requirements of the ship classification bureau for permissible noise limits to allow passengers and crew to be more comfortable and secure a technical assessment is required to address the characteristics of the noise. A noise beyond the standard allowed in the vessel can be a problem to the ship operators. This noise problem will greatly affects the crews' comfort and passengers. One method to reduce the noise on a ship is to use sound insulation. This paper describes the method for determining the absorption coefficient α and the transmission loss (TL) through an acoustic test of a concrete insulation in the laboratory. The test was conducted by using the method of impedance tube where a speciment response measured by a microphone. In general, the properties of this insulation material remains as the main base material which is concrete. it has been found that the transmission loss value (TL) is in the range of 10 - 50 dB whereas for the base material the concrete is around 22 - 49 dB but the absorption coefficient α of the specimen material is much higher than the material of the base material especially in high frequency, which ranges from 0.15 to 0.97, whereas for concrete base materials have absorbent coefficient α ranges from 0.01 to 0.02.
REMOVED: Prediksi Hambatan Kapal Ferry Ro-Ro 750 GT Berbasis Pengujian Hidrodinamika Ahmad Syafiul Mujahid
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 3 No 2 (2018): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v3i2.1856

Abstract

This article was removed at the request of the authors due to developments in the reported case. Removed article: https://doi.org/10.21070/rem.v3i2.1856 Removal notice: https://doi.org/10.21070/rem.v4i2.3011
Pengaruh Flux Elektroda AWS 5.1 E 6013 Dicelup Oli pada Pengelasan Besi Cor Kelabu FC-25 Terhadap Kekuatan Tarik Aris Hermanto; Iswanto Iswanto
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 3 No 2 (2018): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v3i2.1857

Abstract

In this study using specimens of gray cast iron Fc-25 (grade 2500). The test specimen is needed there 12 specimens include three test specimen material (base metal), 3 specimen variety of welding electrodes cast CI-A1, 3 specimen variety of welding using welding electrodes AWS 5.1 E6013 without immersion oil, three specimens variation welding using welding electrodes 5.1 AWS E6013 with immersion oil. The results of testing specimens welding electrodes cast CI-A1 in the amount of 16.63 MPa with 0.84% strain and a variety of welding electrode AWS E6013 5.1 with immersion oil also has the highest ultimate tensile strength of welding another variation in the amount of 17.98 MPa with a strain of 0.48% , While the lowest was tensile strength using a variety of welding electrode AWS E6013 5.1 without immersion oil that is 16.28 MPa with a strain of 0.49%.
Pengaruh Temperatur dan Waktu Etching Terhadap Karakeristik Fisik dan Mekanik Pelapisan Nikel pada Plastik ABS dengan Metode Elektrolessplating Muhammad Budi Nur Rahman; Sunardi Sunardi; Muh Budhi Erlangga; Muh Finza Pratama
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 3 No 2 (2018): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v3i2.1790

Abstract

ABS Plastic (Acrylonitrile Butadiene Stiren) is one type of plastic that is often used because of the many properties that are beneficial to humans. ABS plastic is widely used in engineering, for example in the electronics and automotive fields. But there are still disadvantages of ABS plastic, including low hardness, no friction resistance, and no heat resistance, so surface treatment is needed. Electrolessplating is a coating process that does not use electricity in the coating process. This study aims to determine the effect of temperature and time variation of nickel electrolessplating etching on roughness, wear, hardness, and thickness. The variation in etching temperature is 30; 40; 50; 60; and 70oC and the etching time is 15, 20, 25, 30 and 35 minutes followed by electrolesplating using nickel for 10 minutes. The tests carried out were surface roughness test, disk on block method wear test, hardness using Shore Durometer tool, and layer thickness using micro photos and scanning electron microscopy (SEM). The results showed that the etching process from electrolyplating affected the specimen surface to be coated with nickel metal. The longer the etching time causes the surface to become coarser from 0.435 μm at 15 minutes to 0.949 μm in 35 minutes. The temperature addition of the etching process will increase the surface surface to a temperature of 50oC at 0.499 μm and then drop. Increasing etching time from 15 minutes to 35 minutes will reduce specific wear, from 1.268 x 10-4 mm2 / kg to 0.465 x 10-4 mm2 / kg. Likewise, the etching temperature from 30oC to 70oC decreases the specific wear from 2.10 x 10-4 mm2 / kg to 0.255 x 10-4 mm2 / kg. The addition of etching and temperature etching time does not significantly increase the hardness value of electrolessplating results. Hardness of raw material is 83.5 shore D after coating the hardness value to 84.7 shore D. The electrolessplating process for 10 minutes produces a layer thickness of 1 μm to 2 μm.
Analisa Kinerja Aliran Fluida dalam Rangkaian Seri dan Paralel dengan Penambahan Tube Bundle pada Pompa Sentrifugal Muhammad Marzuky Saleh; Edi Widodo
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 3 No 2 (2018): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v3i2.1884

Abstract

Pump is a device used to move fluid from one place to another through the pipe media as a channel. The pump has 2 important components in its performance, namely: Impeller and pump house (casing). When the pump cannot meet the required capacity it can use series and parallel pump circuits to increase it. When moving the fluid to a high surface or high pressure it will have the specifications of the head and discharge. Fluid flow is a liquid that flows in a pipe. In flow there is fluid pressure and also flow type. There are 3 flow types, namely laminer, transition, turbulent. To reduce turbulence in the flow can be used Tube bundle which is a device consisting of several pipes that are tied together that are attached to a cross section in the pipe. This research was conducted in 4 testing stages, namely series circuit with additional tube bundle, series circuit without additional tube bundle, parallel circuit with additional tube bundle, parallel circuit without additional tube bundle. Each test takes fluid pressure, discharge, flow type. From the results of this study it was found that the parallel circuit pump with an additional tube bundle produces fluid pressure, discharge, flow velocity smaller than the series circuit, whereas when without additional the parallel tube pump bundle produces a fluid pressure, discharge, flow velocity greater than the circuit series, while for the flow type of this study is turbulent flow.
Pengaruh Daya Motor Bensin Terhadap Kapasitas Produksi Mesin Pemipil Jagung Nasmi Herlina Sari; Nurhasanah Nurhasanah
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 3 No 2 (2018): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v3i2.1681

Abstract

The demand for corn kernels is increasing in developing countries. This study focuses to investigated the effect of power engine on the production capacity of corn sheller machine. The power of engine has been varied i.e 4 HP, 5,5 HP and 8 HP. The methods of this research using by empirisly calculated. The results shows that the maximum production capacity obtained on power engine at 8 HP, 5,5 HP and 4 HP are 14 kg/minutes, 10 kg/min, and 7 kg/min, respectively. The conclusion of this research is the production capacity of corn sheller machine affected by power engine, shaft diameter, pegs length, bearing number and spin sheller.
Pendekatan Eksperimen Karakteristik Respon Getaran Sistem Two Degree of Freedom dengan Penambahan Independent Dual Dynamic Vibration Absorber Susastro Susastro; Novi Indah Riani
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 3 No 2 (2018): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v3i2.1729

Abstract

Vibration is one of the problems that must be reduced in a vehicle. There are many ways to reduce vibration in vehicles, one of them is by adding Dynamic vibration absorber (DVA). While Dual Dynamic vibration absorber (dDVA) is a DVA period that is able to move in the translational direction given to the system to reduce translation vibration and when there is resonance. Translation DVA is an additional type of time used to reduce the vibration of the translation direction. So far there is not much research related to the use of translational DVA to reduce rotational vibrations as well as translation. In this study, a study was conducted related to the use of independent double translational DVA (dDVA) to reduce translation vibrations as well as rotation of the beam. The research was conducted by modeling the system obtained into mathematical equations and simulations were carried out to determine the characteristics of vibrations that arise. In the simulation, one of the DVA periods is placed at the center of the main system period, while the other DVA period is given a change between the center period and the end of the system. The results of the study show that the maximum reduction in translational vibration is 95.51% and occurs when the absorber is placed at the center of the system, while the maximum rotation vibration reduction is 56.62% and is obtained when the system is given with an arm ratio of 1 and zero.
Sintesis Komposit Kampas Rem Bebas Asbes Berpenguat Serbuk Kulit Singkong Widya Emilia Primaningtyas; Rahma Rei Sakura; Amir Biqi; Chamim Handoyo
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 3 No 2 (2018): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v3i2.1614

Abstract

An agricultural waste production in Indonesia is increasing as well as the growth of agricultural production. This has become a serious problem in Indonesia. A massive waste will have a negative impact on the health of living things. Therefore, this study aims to provide solutions for the utilization of agricultural waste for the needs of the industry in the automotive sector. In addition, the use of agricultural waste, especially cassava peel waste, can be used as a substitute for brake pads in the form of composite reinforced natural fibers. There are two conditions for cassava peel waste, carbonized and uncarbonized. 50,80,100 Mesh particle size of cassava peel powder used. The composition of the ratio of volume fraction between cassava peel powder and composite epoxy resin used are 20:80; 30:70; and 40:60. The results show that variations in the composition of fibers and resins have an impact on wear values. The best wear resistance shown from the added of 20% cassava peel powder in 100 mesh sizes of particle with 0,00061 ± 0,00039.
Pengaruh Putaran Spindel dan Cairan Pendingin terhadap Kekasaran Permukaan Baja AISI 4140 pada Proses Pembubutan Angga Hari Setyawan; Iswanto Iswanto
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 4 No 1 (2019): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v4i1.2629

Abstract

The purpose of this paper discusses how the effect of different spindle spin speeds on surface roughness, how the effect of different coolant fluid on surface roughness and is there an interaction between rotation speed of spindle and coolant to surface roughness in conventional lathe process. In this study the variable varied is the spin speed of the spindle that is is 630 rpm, 920 rpm, and 1250 rpm and the variation of coolant used is coolant, used cooking oil, and used SAE 40 oil. Then the surface roughness test was done. From the results of surface roughness test previously done the lathe process with variations of rotation speed of spindle and coolant, it can be concluded that: the highest surface roughness value was obtained during the turning process using used cooking oil coolant and spindle rotation used at 920 rpm. While the lowest value of surface roughness of the workpiece is obtained when using used SAE 40 oil coolant using a spindle rotation of 1250 rpm.
Peningkatan Performansi Cooling Tower Tipe Induced Draft Counter Flow Menggunakan Variasi Bentuk Filler Eky Novianarenti; Gatot Setyono
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 4 No 1 (2019): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v4i1.1766

Abstract

This study aims to build and test a cooling tower. Cooling tower is a heat exchanger that functions to cool the hot water from the condenser and throw heat into the atmosphere at a power plant. This is done so that the temperature of the hot water from the condenser can cool as the original condition. One component of the cooling tower compiler is filler. Filler is a component that is very influential on cooling tower performance, where the contact surface between water and air is expanded and the contact time is extended. The study was conducted experimentally using the NTU (Number of Transfer Unit) method. The variations made in this study are straight filler, zig zag, and wavy shape. The parameters observed are the rate of heat transfer, cooling tower capacity and the effectiveness of the cooling tower.

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