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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 7 Documents
 1 
Search results for , issue "Vol 4 No 2 (2019): Desember 2019" : 7 Documents clear
Experimental Study of Artificial Solar Air Heater Using Trapezoidal Wave Plate Lohdy Diana; Arrad Ghani Safitra; Muhammad Syarifuddin Firmansyah; Mishbaakhus Prana Zinedine
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 4 No 2 (2019): Desember 2019
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v4i2.806

Abstract

A solar air heater is needed for the drying process, especially in Indonesia. It means the researches to produce a solar air heater that had high performance is necessary. This research analyses the performance of solar air heater using trapezoidal absorber plate with variation of folded angle 83˚, 85˚, and 87˚. The research carry out artificial experimentally using halogen lamp as a solar simulator. The working principle of solar air heating begins with an induction fan sucking air to enter through the honeycomb then flowing into the air heating duct. The process of heat transfer occurs in a halogen heat lamp passed by the transparent glass and then absorbed by the absorbent plate. This heat will heat the air flowing in the air heating pipe to be transmitted into the drying cupboard. The experiment used several variations of the mass airflow rate 0.022 until 0.051 kg/s and intensity 850, 900, dan 950 W/m2. Temperature measurement is carried out by installing a thermocouple at several points that have been determined. The best performance produced by the wave plate-shaped trapezoidal wave heaters 83˚ when I = 950 W/m2 air mass flow rate 0.022 kg/s with the temperature of the absorbent plate 87 ˚C, the temperature of the exit air 43.2 ˚C, the difference in the rise in air temperature 15.2 ˚C, and when I = 950 W/m2 air mass flow rate 0.051 kg/s the useful heat generated by the air heater 527 Watt, and thermal efficiency 96.8%.
Characteristics of Peanut Skin Briquettes and Rice Husk Using the Torefaction Method in a Microwave Oven Kuntang Winangun; Fauzan Masykur; M. Malyadi; Rendy Cahyono
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 4 No 2 (2019): Desember 2019
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v4i2.807

Abstract

Biomass briquettes are an alternative to fossil energy. Biomass briquette material has a large capacity and is easily available in the surrounding environment. The purpose of this study was to determine the value of water content, value of ash content, value of volatile matter content, value of bound carbon content and calorific value of mixed briquettes of peanut shell and rice husk with three different percentages. First a mixture of 30% peanut shell and 70% rice husk, second a mixture of 50% peanut shell and 50% rice husk, third a mixture of 70% peanut shell and 30% rice husk. From the results of the research data, it can be seen that the lowest water content is in a mixture of 70% peanut shells and 30% rice husks of 14.225. The lowest value of ash content was found in a mixture of 70% peanut shell and 30% rice husk at 13.873%. The lowest value of volatile substances was found in a mixture of 30% peanut shell and 70% rice husk at 36.712%. The highest value of bound carbon content was found in a mixture of 30% peanut shell and 70% rice husk at 27.028% and the highest calorific value was found in a mixture of 70% peanut shell and 30% rice husk at 5834.60 cal / g.
Static Analysis of Frame Structure of Post-Stroke Tricycle Design Based on Solidworks Software 2012 with Material Type Variations Eko Siswono; Mulyadi Mulyadi
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 4 No 2 (2019): Desember 2019
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v4i2.808

Abstract

The body weight of post-stroke patients varies from one another, this can affect material selection. In this study, the researchers designed a three-wheeled frame using various types of material and the same material size including: galvanized pipe, stainless pipe (AISI 304), mild steel pipe (ASTM A36), Alloy Steel pipe to obtain a safe design for sufferers post-stroke, the skeletal design was analyzed statically using Soliworks 2012 software to obtain the results of analysis in the form of: Von Mises Voltage, Safety Factor (Strain) and Strain (Displacement). Static analysis of Post-Stroke Tricycle Design results obtained the greatest Von Mises Voltage value on ASTM A36 type material with a stress value of 154.5 N/mm2 (MPa) and the smallest stress value in Galvanized type material with a stress value of 150.8 N/mm2 ( MPa). Based on the results of the analysis of Safety Factors (Safety of Factor) so that the design can be said to be safe for patients after stroke, the type of material that must be used is Alloy Steel with a value of Safety Factor (Safety of Factor) of 5.49.
Design of Hydraulic Puller for Releasing Crankshaft Bearings on Motorcycle Junggie Guko Armfirst; Arasy Fahruddin
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 4 No 2 (2019): Desember 2019
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v4i2.809

Abstract

The bearing puller on the market today still has a way of working using a gripper with a screw working system. The time required is relatively long and can allow damage to the crankshaft during the bearing release process as well as reduced work performance of the crankshaft. This study aims to design a tool that works with a hydraulic system to release crankshaft motorbike bearings. This tool makes it easy for everyone to do the job of removing bearings. The outer bearing hydraulic tracker or puller uses the working principle of the lever that is pumped with calculated pressure and load and the fluid pressure on the tracker can be known ie at 1X the tracker pump requires 41 kg / cm2 fluid pressure, 2X fluid pressure tracker pump 45 kg / cm2 and 3X pump tracker requires 72 kg / cm2 fluid pressure. As well as the time needed to remove the crankshaft bearing motor especially on the A and B motorbike. To release the crankshaft bearing A motor takes 19.78 s and removing the crankshaft bearing the B motor takes 31.95 s.
Comparison of Predicted Obstacle Prediction for ALPO Type Catamaran Transport Vehicle Wibowo Harso Nugroho; Abdul Kadir; Nanang JH Purnomo; M. Syaiful; Ahmad Yasim
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 4 No 2 (2019): Desember 2019
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v4i2.810

Abstract

With the increase of the Decommisioning Offshore Platform in Indonesia water, a decommisioning vehicle is needed to dismantle and transport the offshore platform. Because of the operation of this vehicle to disassemble offshore platform in various offshore platform locations in Indonesian water, it is necessary to consider the vehicle main engine power by predicting the ship resistance when traveling to the offshore platform location. This paper discusses the results of several numerical prediction methods of resistance that applied on the catamaran ship type. The prediction method used for resistance calculation which based on satistical data and analytical methods from the cylindrical body theory. The resistance prediction on the decommisioning vehicles using maxsurf resistance with various methods at 12 knots service speed shows that Holtrop method produces a resistance value of 250.7 kN, the Van Oortmerssen method produces a resistance value of 955 kN, the Series60 method produces a resistance value of 210.5 kN, the Compton method produces a resistance value of 295.8 kN, the Fung method produces a resistance value of 540.6 kN, method Slender body produces a resistance value of 7036.4 kN, the Wyman method produces a resistance value of 603.2 kN and finally the last method of KR Barge produces a resistance value of 1258.5 kN. This study show that the differences of the result are significant from each of the prediction methods so that testing of the hydrodynamic model is highly recommended.
Effect of Stator Vane on the Performance of the Savonius Wind Turbine Yoga Arob Wicaksono
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 4 No 2 (2019): Desember 2019
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v4i2.811

Abstract

The turbulent air flow conditions in the urban area have a large effect on the performance of Savonius rotor wind turbines. To overcome this problem, a new design of the stator vane needs to be made. the stator vane has the ability to direct wind to the turbine rotor and increase air speed by utilizing throttling effects. Thus, the performance of the Savonius wind turbine can increase. In this study, the Savonius type vertical wind turbine is configured with three stator vane designs that have slope angles: 60o, and 70o. Performance testing is carried out at angles: 0o, 30o, and 60o towards the midpoint of the stator vane to find the direction of direction coming from the best wind on each stator vane design. All configurations are analyzed using an experimental wind tunnel open testing scheme with a wind speed range of 3-5 m/s. The parameters produced from the experiment include: power coefficient (Cp), torque coefficient (Ct) and Tip Speed ​​Ratio (TSR). The results showed that the stator vane with 60o inclination angle was able to increase Cp 35.66% in the 60o incoming wind direction.
Effect of Heat Treatment on Physical and Mechanical Properties of Cemented Carbide and Carbon Steel Brazed Joints Yoyok Winardi
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 4 No 2 (2019): Desember 2019
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v4i2.812

Abstract

Cemented carbides are joined with steel to be used as a cutting tool. Brazing is one of a method joinning metals that has the potential to combine different types of materials such as cemented carbide and steel. This study aimed to investigate the effect of heat treatment on the microstructure and the distribution of the hardness value brazed joint between cemented carbide and carbon steel. The heat treatment was carried out at a temperature of 700oC, 725oC, and 750oC for 30 minutes. The joint area is observed using SEM equipped with EDS. The distribution of hardness value ​​was tested using a micro vickers testing machine. Microstructure observations and SEM-EDS analysis show that the junction region consists of 3 parts, part I is the phase of Cu solution enriched solid, part II phase of the solid solution with the highest percentage of Ag, and part III is the eutectic phase of Ag-Cu-Zn . EDS test results in each section show that the value of element C increases when the treatment temperature is increased. The hardness test results show that the distribution of the hardness value increases when the treatment temperature is added. The hardness of the test specimen without treatment reached 112.73 VHN. The highest hardness value is 131.88 VHN at 750oC. Thus the heat treatment affects the microstructure and the rate of diffusion of metal elements. The higher the temperature, the diffusion rate of the metal element increases, so that it affects mechanical.

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