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INDONESIA
Journal of Energy, Mechanical, Material and Manufacturing Engineering
Published by Universitas Muhammadiyah Malang
ISSN : 25416332     EISSN : 25484281     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Journal of Energy, Mechanical, Material and Manufacturing Engineering Scientific (JEMMME) is a scientific journal in the area of renewable energy, mechanical engineering, advanced material, dan manufacturing engineering. We are committing to invite academicians and scientiests for sharing ideas, knowledges, and experiences in our online publishing for free of charge. It would be our pleasure to accept your manuscripts submission to our journal site.
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol. 7 No. 1 (2022)" : 7 Documents clear
Effect of pack carburizing and viscosity of quenching media on AISI 1010 steel Agris Setiawan; Anggar Dipogusti
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 7 No. 1 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i1.20743

Abstract

Pack carburizing is a method of surface hardening of steel which is carried out by diffusing carbon into the material where the carbon is initially solid. This study aims to determine the effect of pack carburizing treatment on the microstructure and hardness of AISI 1010 steel. The material was then cooled slowly in the oven to a temperatur of 150oC which was then followed by air cooling. Single Quenching is then carried out by reheating the carburizing material to a temperature of 870oC and then holding it at that temperature for 60 minutes. Quenching is done by cooling the material quickly using a cooling medium of varying viscosity. The results of the composition test showed an increase in carbon content to 4.1159%. The results of microstructure observations showed that a massive pearlite structure was formed to a depth of ± 0.794 mm on the surface of the carburizing specimen. The results of the hardness test using the Vickers method showed that the hardness value of the raw material increased after carburizing to 217.88±5.13 HV due to the formation of a pearlite structure. With this increase in hardness, the application of AISI 1010 Steel material becomes wider. Keywords: Carburizing, Quenching, Viscosity, Hardness, Microstructure
Effect of roof and wall material on energy usage for house cooling system in hot-humid climate Izzah A Wardah; Niken Adriaty Basyarach
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 7 No. 1 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i1.22574

Abstract

A model of a typical townhouse in Surabaya is simulated using building energy simulation software to analyse the energy consumption for cooling due to a severe climate. The assessment focused on the internal heat effects caused by the wall and roof material to meet the thermal comfort in a hot-humid climate region. A baseline building was a one-story building for one family with the typical load profile in Surabaya applied. The insulation thickness and material composition of the wall and roof were varied, whereas the internal cooling system was maintained at 25.5oC by the air-conditioning system. Results are presented and compared in terms of the annual energy consumption to meet the Indonesian standards for buildings. The best optimisation shows that the implementation of the insulation in the model can lower the annual energy consumption and conserve the energy by 37%.
The Study Analysis of Car Rim Design and Mechanical Properties Using Catia Bayu Pranoto; Gunawan Chandra; Fakhruddin Muhammad; Trifiananto Muhammad; Purwanto
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 7 No. 1 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i1.18369

Abstract

This study discusses the design of a car rim and analyzed its mechanical properties using three different basic materials: aluminum, steel, titanium. The purpose of this study is to reduce production time and to minimize the risk of design failure. In this study using the Catia software to design a rim, then simulate the effect of applying force on a component, applying a certain working pressure, then able to perform calculations and display the results for analysis. The analytical method used is the FEM method of static analysis. The mesh type uses a linear tetrahedron mesh. Provision of clamps or fixed constraints is carried out on the surface of the bolt hole, where this surface is in contact with the wheel holder of car drive system. Then given a circumferential loading of 200 kN/m2. It was found that aluminum material is the best for the manufacture of car rims, which has a low density so it is lighter than steel and titanium. However, alloys such as lead and magnesium are needed to increase their hardness, and chromium alloys are needed to protect the rims from corrosion due to use in a polluted environment and contain impurities that can trigger corrosion.
Effect of Thermoelectric Power and Air Flow on Air Temperature and Relative Humidity Arasy Fahruddin; Prantasi Harmi Tjahjanti; Mulyadi
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 7 No. 1 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i1.21761

Abstract

A dehumidifier is a device for drying air by releasing moisture. A dehumidifier with a thermoelectric cooler has the advantage of being more compact and has the potential to be combined with an air heater. This study aimed to determine the effect of thermoelectric power and airflow on air temperature and relative humidity. The research method uses direct experiments with six pieces of thermoelectric as a coolant. The data taken are the cooler surface temperature, the air temperature that is dried, and the humidity of the air. The test results show that the dried air temperature can reach 25.6oC with 78% humidity in environmental conditions with an ambient air temperature of 31oC.
On Vehicle Stabilization Under Saturation Constraints by Linear Quadratic Regulator Mulia Vania Katherine; Djamari Djati Wibowo; Veza Ibham; Ignatius Pulung Nurprasetio
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 7 No. 1 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i1.23225

Abstract

The stability of a four-wheel vehicle is an issue widely discussed. As an effort to reduce accidents involving four-wheel vehicles, many studies have been conducted to develop a vehicle stability control system. So far, all studies utilize vehicle lateral dynamics model as the reference to derive the desired states. However, defining the desired states using steady-state cornering values may yield instability due to changes in tire cornering stiffness. This paper proposes a simple vehicle stability control system that could stabilize the vehicle and allow tracking of a desired state under the case of vehicle instability due to reduced rear tire cornering stiffness. The controllers are designed using Linear Quadratic Regulator (LQR) technique and combined with the servo control system to track a reference state. Simulations are performed in MATLAB to validate the controller’s performance with and without controller constraint. Results show that the controller successfully stabilizes the vehicle and tracks the desired state.
Economical sustainability of integrated photo voltaic and hydroponic systems for rural areas Conny K Wachjoe; Hermagasantos Zein; Annisa Syafitri Kurniasetiawati; Teguh Sasono; Yanti Suprianti; Fitria Yulistiani
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 7 No. 1 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i1.22938

Abstract

Hydroponic plantations are an effort of future agricultural technology, and this is due to population growth and increasingly saving agricultural land. Besides that, hydroponics can trigger rural economic development by opening employment opportunities for rural areas. The realization of hydroponics in rural areas that are not connected to the grid can use solar energy to circulate water continuously. The components of photo voltaic systems have been designed to the needs of the hydroponic system. Photo voltaic technology has been used for a long time for lighting in remote areas. Integrating the photo voltaic system with hydroponics is a synergistic effort to use energy productively. The case the demand for vegetables in rural areas is minimal, with limited land and the level of land productivity that depends on the availability of fertilizers. The economical method for analyzing the integrating system of photovoltaic and hydroponic systems is based on PBP, CCP, and ROROI. The results obtained for kale based on the PV-hydroponic integration system have a return on investment (PBP) of 13.5 months, cumulative cash posit (CCP) of 1.84, and Rate of Return on Investment (ROROI) of 8.01%. Adding the second and third hydroponic plant modules can reduce PBP to 6.2 months and 5.2 months, respectively. Likewise, CPP increased from 1.84 to 3.68 and 5.21, respectively. Meanwhile, ROROI rose from 8.01% to 11.43% and 13.34%, respectively.
Identification of the fracture surface of thermoset polyester due to bending load Nusyirwan; Mutya Rani; Rully Pratama
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 7 No. 1 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i1.23086

Abstract

In this research, an attempt was made to improve the brittle nature of the Unsaturated Polyester (UP) polymer which cannot undergo plastic deformation to be improved to become more resilient by adding Thermoset Vinyl Ester and Methyl Methacrylate (MMA). To show the change in the toughness of the polyester material, a test is carried out to provide a tensile load and a flexural load until the material breaks This work reports the successful fabrication of polyester blends by mixing vinyl esters with different percentages. The test shows that there is a linear relationship between the shape of the fracture surface due to bending loads and observations through SEM which are directly related to the flexural stress properties with the fracture surface morphology. The mixture of polyester with 40% vinyl ester showed the highest flexural stress of 126.88 MPa while for pure polyester of 49.71 MPa this showed an increase of 255.24% compared to pure polyester. This shows that the addition of vinyl ester to polyester resulted in an increase in the toughness of the polyester, but for 100% vinyl ester the return stress decreased by 56.50 MPa. This indicates that due to the breaking of some of the polyester chain networks causes a decrease in the structural stiffness, which results in an increase in the plastic deformation zone fraction.

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