Jurnal MEKANIKAL
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PENGARUH KECEPATAN SPINDEL TERHADAP KEKUATAN BENDING ALUMINIUM 6063 T5 PADA PROSES FRICTION WELDING
No full textThe purpose of this study is to determine the effect of spindle rotation on bending strength, hardness value and knowing the microstructure formed from aluminum 6063 T5 after the friction welding process. The spindle rotation speed used is 560 rpm, 800 rpm and 1260 rpm. The test used is bendingtesting. This research was carried out at the Material Testing Laboratory of the Department of Mechanical Engineering, Faculty of Engineering, Tadulako University. The highest bending test results were at a speed of 1260 rpm with a value of 459.31 Mpa, followed by a speed of 800 rpm with a value of 437.67 Mpa and the lowest at 560 rpm with a value of 408.54 Mpa. The highest hardness value is found in the friction welding process specimen at a speed of 1260 rpm with a hardness value of 37,282 kg/2then followed at a speed of 800 rpm with a hardness value of 36,622 kg / kg/2, and the lowest hardness value is at a speed of 560 rpm with a hardness value of 35,354 kg/2. The result of observation of microstructures is that the higher the speed of spindles used, the more smooth and densely formed grain structures
DEFLEKSI VERTIKAL POROS TURBIN ANGIN MULTI BLADE DI DAERAH PEDESAAN JENEPONTO - BAGIAN I: KAJI TEORITIK
Full text linkThe multi-blade wind turbine is a type of wind turbine that has been used by salt farmers in Paccelang Village, Jeneponto Regency, South Sulawesi Province. In operation, turbines often experience damage due to excessive vertical deflection of the shaft. This article examines and identifies the parameters that cause the vertical deflection of the shaft. The research was carried out theoretically and numerically. Theoretically, the research was carried out by entering the corresponding parameters into the described shaft vertical deflection equation. Numerically, the research was conducted using software inventor. In part I of this article only shows the results of theoretical studies. The parameters that cause excessive vertical deflection of the shaft and sorted by the magnitude of the contribution are reduction in shaft diameter, shaft elongation, and enlargement of external load
PENGARUH VARIASI KEDALAMAN PEMOTONGAN DAN KECEPATAN PEMOTONGAN TERHADAP KEKASARAN PERMUKAAN ALUMINIUM 7075
Full text linkThis research intends to determine the effect of variations in cutting depth and cutting speed on the surface roughness value of aluminum 7075. Based on the results of data analysis, it can be concluded that cutting speed has an effect on the surface roughness value of the specimen. The higher the cutting speed used, the lower the quality results (smooth). The high cutting depth causes a decrease in the cutting force and the shear cross-sectional area, each cutting depth used has a difference in the surface roughness of the specimen. The greater the depth of cutting used will cause an increase in surface roughness, when the combination of cutting speed and depth of cut is found to have the lowest roughness (fine) at a cutting speed of 14.7 m/min and 0.5 mm, while the highest roughness (coarse) at a cutting speed of 11.3 m/min and a cutting depth ratio of 1. mm. The higher the cutting speed, the lower (fine) the level of roughness and the greater the depth of cutting, the higher the roughness value obtained (coarse)
PENGARUH JARAK NOZEL PADA EVAPORATIVE COOLING SYSTEM TERHADAP KINERJA MESIN PENGKONDISIAN UDARA TIPE TERPISAH (SPLIT)
No full textThe use of an air conditioning machine or Air Conditioning (AC) is very plays an important role in obtaining a comfortable room temperature for its users. The largest use of electrical energy is in the air conditioning system This research examines the effect of the addition of Water Mist Nozzle with a distance variation of 1, 10, and 20cm on electricity savings and Coefisien of Perfomance. electricity and Coefisien Of Perfomance (COP). The method used in this This research is to conduct experiments on a 1 PK split air conditioner for 1 hour for one experiment. hour for one experiment. The results showed the use of Water Mist Nozzle variation distance gives a different influence on the performance of the air conditioning machine, where testing without a Water Mist Nozzle has a COP of 3.37 with an electric consumption of 1.5 PK. Water Mist Nozzle has a COP of 3.37 with electricity consumption of 0.817 kWh, with the addition of Water Mist Nozzle distance of 1 cm, electricity consumption electricity consumption decreased by 17.27% and the COP was 4.39 and at a distance of 10 cm, the percentage of electricity consumption decreased by 15.44% and COP 4.07. then at a distance of 20 cm peresntase decrease in electricity consumption by 14.11% and a COP value of 3.80
PENGARUH KECEPATAN SPINDEL DAN MEDIA PENDINGIN PADA PROSES PENGGURDIAN ALUMINIUM AA6061 TERHADAP BURR FORMATION
No full textThe results of data analysis in this study indicate that at 443 rpm spindle rotation with air cooling media the smallest average value of burr formation is 4.34 mm and the largest value occurs at 970 spindle rotation with oil cooling media with an average value of burr formation as much as 10.98 mm. This is caused by the cooling medium which has different viscosity values so that it can affect the size of the burr formation value and the low spindle rotation also affects thesmall value of the resulting burr formation. The formation of burr formation is better by using a low spindle rotation and using a cooling medium that has a low viscosity value
ANALISIS TEORITIS DAN EKSPERIMENTAL DEFLEKSI PADA KAYU DENGAN VARIASI JENIS DAN POSISI PERLETAKAN
Full text linkThis study aims to determine the value of the deflection of the wood theoretically and experimentally. This study used wood as a test materil with variations in the types of malapoga, teak and palapi. Variations in the position of the placement, A1 = 30 mm x 20 mm, A2 = 25 mm x 24 mm, A3 = 20 mm x 30 mm, using staples at a distance of L/2 mm from the pedestal. The research was conducted at the Mechanical Engineering Laboratory, Faculty of Engineering, Tadulako University. The results showed that the modulus of elasticity of malapoga wood was 630.63 N/mm², teak 1165.36 N/mm², and palapi wood with a value of 1412.00 N/mm². While the maximum deflection value occurs in Malapoga wood with 30 mm x 20 mm placement with a value of 41.32 mm (theoretical), 6.77 mm (experimental), 25 mm x 24 mm placement 28.69 mm (theoretical), 4.91 mm (experimental), 20 mm x 30 mm placement 18.36 mm (theoretical), 4.22 mm (experimental), for teak wood placing 30 mm x 20 mm with a value of 22.35 mm (theoretical), 5.77 mm (experimental), placing 25 mm x 24 mm 15.52 mm (theoretical), 4.57 mm (experimental), placement of 20 mm x 30 mm 9.93 mm (theoretical), 3.77 mm (experimental), while for palapi wood with a position of 30 mm x 20 mm with a value of 18.44 mm (theoretical), 5.13 mm (experimental), placement of 25 mm x 24 mm 12.81 mm ( theoretical), 4.48 mm (experimental), 20 mm x 30 mm placement 8.20 mm (theoretical), 3.39 mm (experimental). Based on the results of this study, it can be explained that as the moment of inertia increases, the deflection value decreases
PENGARUH SUDUT ELEVASI PANEL FOTOVOLTAIK TERHADAP CAHAYA AC BOHLAM SEBAGAI SUMBER ENERGI FOTON
Full text linkThe most optimal elevation angle for the PV module in this study depends on the type and power of the given bulb and the area of light received by monocrystalline photovoltaic panels, for the 3 types of bulbs used the most optimal elevation angle is 0°. The highest efficiency of the PV module is at an elevation angle of 0° with a 20 Watt CFL bulb, which has an efficiency of 1.49%. The maximum output power generated from the PV module is 0.044 W which occurs in the 15 Watt Hannochs LED bulb. This can happen because it is influenced by the light source that points directly to the surface of the monocrystalline photovoltaic panel so that the light received by PV is not wasted much compared to the amount of light received at angles of 15°, 30°, and 90°
PENGARUH PERENDAMAN CYROGENIC TERHADAP SIFAT KEKERASAN DAN STRUKTUR MIKRO PADA FCD-45
Full text linkFCD-45 nodular cast iron is a type of cast iron. to improve the mechanical properties of FCD-45 iron can be done through a direct cooling process. In direct cooling of liquid nitrogen -1930C it can be seen the effect on the increase in hardness properties and changes in microstructure (ferrite, pearlite, graphite). The process of direct cooling of liquid nitrogen -1930C which was carried out included cyrogenic immersion for 72 hours and 120 hours (holding time). The results showed that the effect of direct cooling increased the hardness of the specimen and gave changes to ferrite, pearlite and graphite on the FCD-45 iron microstructure. an increase of 6.83 HRB for a holding time of 120 hours. For the FCD-45 microstructure, it underwent a change where there was addition of ferrite, pearlite and graphite and it was more evenly distributed than the As-cast specimen
PENGARUH JUMLAH PELARUT ASETON DENGAN PEWARNA DAUN KELOR TERHADAP PENINGKATAN ARUS DAN TEGANGAN PADA SOLAR SEL DSSC
Full text linkDye sensitization solar cell is a circuit that works by converting light energy into electrical energy. This research aims to determine the effect of acetone solvent with Moringa leaf dye on the performance of dye-sensitized solar cells. A prototype dye-sensitized solar cell (DSSC) using anthocyanin from Moringa leaves mixed with acetone solvent has been successfully created for the first time. The DSSC prototype was made in the form of a sandwich structure, using the doctor blade method for TiO₂ deposition. The output produced from the DSSC prototype in the form of current and voltage is a current of 0.00000190 A in 100 ml solvent and a voltage in 200 ml solvent of 0.491 Volt. in 100 ml of Moringa leaf dye mixed with 200 ml of acetone solvent for a soaking time of 24 hour
STUDI EKSPERIMEN PV POLYCRYSTALLINE YANG DIPASANG SECATUNGGAL DAN SERI PADA KANOPI DAN DINDING BANGUNAN
Full text linkThis study aims to calculate the difference in power and efficiency resulting from the installation of PV panels both in series and singly placed on the west side wall of the building, and calculate the difference in power and efficiency resulting from the installation of PV panels both in series and singly placed on the west side window canopy of the building. The research was conducted on the dinidng and roof of the window canopy on the west side of the Mechanical Engineering library building, Faculty of Engineering, Tadulako University. The PV panel circuit is divided into two, namely for series power of 20 and 30 Wp and for single 50 Wp. The panel placement was varied in 3 parts, single-series on the wall, single-series on the window canopy and single on the canopy-series on the wall. The results show that the placement of PV on the window canopy produces high output power with the maximum power in the single circuit of 15.90Watt, while the series circuit is 10.10Watt, compared to the placement on the wall. Then the highest efficiency value in a single circuit is obtained in the placement of PV on the wall of 10.86%, while the highest efficiency value in the series circuit is obtained in the window canopy of 6.24%, while the efficiency on the wall is 3.81