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Contact Name
Heru Suryanto
Contact Email
jmest.journal@um.ac.id
Phone
+62341588528
Journal Mail Official
jmest.journal@um.ac.id
Editorial Address
3rd floor of H5 Bulding, Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Malang Jl. Semarang 5 Malang, Jawa Timur, 65145 Telp 0341-588528 / 0341-551312 ext 298
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Kota malang,
Jawa timur
INDONESIA
Journal of Mechanical Engineering Science and Technology
ISSN : 25800817     EISSN : 25802402     DOI : 10.17977
Journal of Mechanical Engineering Science and Technology (JMEST) is a peer reviewed, open access journal that publishes original research articles and review articles in all areas of Mechanical Engineering and Basic Sciences
Articles 6 Documents
Search results for , issue "Vol 3, No 2 (2019)" : 6 Documents clear
SYNTHESIS AND APPLICATIONS OF HEMATITE α-FE2O3 : A REVIEW Muhajir, Muhamad; Puspitasari, Poppy; Abdul Razak, Jeefferie
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 2 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (739.115 KB) | DOI: 10.17977/um016v3i22019p051

Abstract

This article reviewed the hematite ?-Fe2O3, which focuses on its material properties, nanostructures, synthesis techniques, and its numerous applications. Researchers prepared the hematite nanostructure using the synthesis methods, such as hydrothermal, and, further, enhanced it by improving the techniques to accommodate the best performance for specific applications and to explore new applications of hematite in humidity sensing.
CHARACTERISTIC ANALYSIS OF HORIZONTAL AXIS WIND TURBINE USING AIRFOIL NACA 4712 Susilo, Bili Darnanto; Jatisukamto, Gaguk; Kustanto, Muh Nurkoyim
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 2 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6018.754 KB) | DOI: 10.17977/um016v3i22019p096

Abstract

Wind energy has been developed and used as a source of electrical energy by converting wind energy into electrical energy using a generator. There are some wind turbine parameters that important for wind turbines design and model, includes the size of the rotor radius, airfoil selection, chord length, and pitch angle. The study aims to characterize the performance of a horizontal axis wind turbine using computational methods. The methods used a design and simulation of NACA 4412 and NACA 4712 airfoil using QBlade software using wind conditions in the region of Pancer, Jember.  Results show that the maximum Cl value of NACA 4712 is higher than in NACA 4412. NACA 4712 has a maximum Cl value = 1.696 at ? = 14o while NACA 4412 airfoil has a maximum value of Cl = 1.628 at ? = 15o. NACA 4712 has the maximum value of Cl/Cd = 153 at ? = 2o , while the NACA 4412 has a maximum value of Cl/Cd = 133.5 at ? = 5.5o. The maximum value of Cl/Cd 4712 is higher than the NACA 4412. At 7.66 m/s of wind speed with 10% turbulence conditions, wind turbines with NACA 4712 airfoil have Cp turbine performance parameters of 0.49929 and obtain a power of 1.15 kW, while wind turbines with NACA 4412 have Cp turbine performance parameters of 0.395365 and obtained power of 0.889 kW at the same wind speed.
THE EFFECT OF CHLOROPHYLL CONCENTRATION FROM PAPAYA LEAVES ON THE PERFORMANCE OF DYE SENSITIZED SOLAR CELL Rizali, Dede; Suryanto, Heru; Sukarni, Sukarni
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 2 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (934.282 KB) | DOI: 10.17977/um016v3i22019p059

Abstract

Dye-Sensitized Solar Cell (DSSC) is the third generation solar cell that has sandwich structure consisted of organic dye material and other components such as titanium dioxide (TiO2) semiconductor, electrolyte, and substrates (counter electrode and working electrode). The dye in the device was made from green plant chlorophyll such as papaya. This research aimed to find the influence of dye concentration from papaya leaves chlorophyll on the performance of DSCC. The discussion covered the output power (Pout), Fill Factor (FF), and efficiency (?). The method in this research was explorative experimental with independent variables such as direct and indirect sunlight. The dependent variables were output power (Pout), Fill Factor (FF), and efficiency (?) from the DSSC. The procedures in this research consisted of substrates preparation, TiO2 paste production, dye solution preparation, electrolyte preparation, counter electrode preparation, and DSSC assembly. The tests on chlorophyll concentration were conducted using spectrophotometry method while the DSSC performance test used 1,000 W/cm2 halogen lamp. The results showed that 100% chlorophyll concentration resulted in 3.1295 mg/m3 chlorophyll content type a. The best DSSC performance was obtained by the DSSC sample that had 100% chlorophyll concentration and 1.1294 mg/m3 chlorophyll content. The direct light of DSSC achieved Pout of 0.9557 mW, FF of 0.07282, and efficiency of 1.499137%. The DSSC with indirect light obtained Pout of 0.00455 mW, FF of 0.01535, and efficiency of 0.049863%.
THE FLAME CHARACTERISTICS OF DIESEL FUEL BLEND WITH KEPUH (STERCULIA FOETIDA) BIODIESEL Prasetiyo, Dani Hari Tunggal; Ilminnafik, Nasrul; Junus, Sallahudin
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 2 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (542.467 KB) | DOI: 10.17977/um016v3i22019p070

Abstract

Kepuh biodiesel fuel (sterculia foetida) is an alternative fuel that can be used to replace fossil fuel. Diesel fuel is performed to determine the laminar flame speed of combustion and high flame by adding biodiesel kepuh volume of 10%, 20%, 30%. The purpose of this study was to study the effect of biodiesel and the effect of bunsen burners on the laminar flame speed of combustion and flame height. Bunsen burner is made of copper and stainless steel. Testing of flame characteristics were carried out by heating the mixture of fuel and air at temperature of 200oC. The purpose of heating the air is to prevent cooling when mixed with fuel. The mixture of fuel and air flowed into the mixing chamber and bunsen burner. The mixture of fuel and water flows into the mixing chamber and bunsen burner to form a fire. Flame images were recorded using a high speed fuji film camera with a speed of 480 fps with a resolution of 224x168. The test results were analyzed by measuring the angle and height of the flame using the freeware imageJ program. The results of the B10 (diesel oil without the addition of biodiesel) fuel mixture test using copper bunsen burner produced a maximum laminar flame speed of 23.6264 cm / s at ? = 0.8. The highest value of the B30 fuel mix flame (30% full biodiesel + 70% diesel oil) produces a maximum flame value using a stainless steel bunsen burner with a value of 25,417 mm at ? = 1.2. The results showed that B10 in copper bunsen burner had the highest laminar burn rate. The composition of the fuel and bunsen burner affects the combustion characteristics and flame height.
CRITICAL SOLID FRACTION POINT ANALYSIS: CASE STUDY ON CEMENT MILL MACHINE DIAPHRAGM Achyarsyah, Mochamad; Puspitasari, Poppy
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 2 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (507.943 KB) | DOI: 10.17977/um016v3i22019p081

Abstract

During the solidification process, metal liquids turn into solid geometry units including the riser and gating system. The disruption in the liquid flow often causes shrinkage in the object. Critical Solid Fraction Point is a critical point where the continuous liquid supply turned solid and unable to pour to some sections. Simulation software can predict the critical solid fraction time of an object and the liquid supply behavior. The simulation helps the designer in the casting design. The application of low steel alloys in the cement industry, e.g., the Diaphragm, needs development to minimize the shrinkage. This research aimed to analyze the critical solid fraction point in the diaphragm steel casting products. The primary objective of this research was to predict the critical solid fraction point during solidification, started from the longest time in the riser/feeder using SOLIDCast 8.1.1 casting software and provided improvement recommendation to minimize the shrinkage.
FAILURE ANALYSIS ON TITEN PROTO-XX CAR CHASIS Jatisukamto, Gaguk; Qoryah, Rika Dwi Hidayatul; Mulyadi, Santoso
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 2 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1697.185 KB) | DOI: 10.17977/10.17977/um016v3i22019p088

Abstract

The car chassis as a skeleton supports all loads and is the most important component. Car chassis requirements must be rigid, twisting resistant, vibration resistant and resistant to fatigue. This study aims to find the cause of the failure of the Titen Proto-XX car chassis connection. The research methodology was conducted by testing the composition of materials and structural analysis using Ansys Workbench Release 15.0 software. The conclusion of the research is that the skeletal structure material uses Aluminum AA series 1XXX with Al content greater than 99.5%, the welding ability is low, causing a failure in the welded joint. The rivet connection failure is caused by the stress concentration in the rivet holes in the plates so that the connection crack propagation occurs.

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