DEFLEKSI VERTIKAL POROS TURBIN ANGIN MULTI BLADE DI DAERAH PEDESAAN JENEPONTO - BAGIAN I: KAJI TEORITIK

The 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

UJI EXPERIMENTAL RATIO OVERLAP SUDU SPLIT SAVONIUS TERHADAP UNJUK KERJA TURBIN WATER VORTEX

Utilization of low-lying areas is an option in developing hydroelectric power plants with low head. This study uses a split savonius rotor with 2 blades, Aspect ratio 1.2, Tip Clearance 5 mm, total head 0.649438 m, water level in the inlet 25 cm, the test was carried out on a whirlpool turbine with a spiral basin, aiming to determine the resulting performance. savonius split rotor on a vortex turbine by varying the Overlap Ratio. There are 4 rotors that have different overlap ratios which are tested at a flow rate of 0.0021 m³/s with loading treatment until the turbine stops. The results showed that the 0.15 Overlap Ratio resulted in the best performance with torque, power, and efficiency values of 0.14620 N.m, 1.7853 watts, and 13.392%, respectively. While the one that produces the lowest value is 0.45 Overlap with each value of 0.08240 N.m, 0.8411 watts, 6.310%

ANALISIS KINERJA ALAT BANTU PENGUKURAN PANJANG INSERT DALAM PEMBUATAN ULIR UNTUK PULLEY SHAFT

Every activity of producing goods is likely to result in defective products and damaged products caused by several factors. Supervision of production results is needed to reduce the number of defective and damaged products. In addition, the quality control analysis process will have an impact on the company's reputation and increase consumer confidence in the company's performance, the manufacture of pulley shafts must be produced with great care to produce excellent product quality. To avoid the number of defective and damaged products that occur, an analysis of each process must be carried out, which aims to quickly find the root causes of product defects and make improvements to eliminate or minimize ongoing defective products. The analysis was carried out using the Fishbone diagram method, namely analyzing the Man, Machine, Method, Material sections. Based on the results of the analysis of the research data, product defects that occur in the effective diameter of the thread occur due to differences in the length of the insert cutting edge for the screw feeding process in the manufacture of pulley shafts. So an improvement was made by making production aids to measure the length of each insert. The measurement results refer to the master insert that was made before, so that the deviation value is obtained which will be input into the program. Performance analysis is carried out on measurement tools so that they can assist in an effective and efficient production process. From the results of analysis and research, it was found that this measurement tool is very helpful in the insert replacement process so that it can reduce the number of defective products produced after replacing the insert eye or a new insert

SIMULASI CFD PADA TRUK STANDAR DENGAN BAK TERBUKA DAN TERTUTUP

The aerodynamic load in the vehicle will affect the stability and fuel consumption in operation. One way to overcome this is to reduce the coefficient drag, which is correlated with the aerodynamic drag force on the vehicle. This study aims to determine the drag coefficient and the airflow characteristics of standard trucks using open and closed boxes. The results show that the truck with a closed box produces a lower drag coefficient than the open box truck. The Closed boxtruck has an average drag coefficient, 20.1% lower than the open box. The flow visualization of the streamline that formed on the two trucks shows that the dominant turbulence and flow separation in the open box truck affects the drag coefficient results

PENGARUH MEDIA AIR LINDI TPA GUNUNG KUPANG DAN AIR LINDI TPA CAHAYA KENCANA TERHADAP LAJU KOROSI DAN JENIS KOROSI PLAT BAJA SPCC-SD JIS G3141

Media studies to study the effect of different leachate media on corrosion rate and type of corrosion with variations of time 1 week and 2 weeks were removed, 2 weeks soaking and 1 week were removed, and 3 weeks soaking. The research data was obtained from the results of research with heavy methods and micro photographs. The successful variable is JIS G3141 spcc-sd steel plate, variable control is leachate from Gunung Kupang TPA and Cahaya Kencana TPA. From the results of the corrosion rate research obtained by leachate media taken from Mount Kupang landfill has the fastest corrosive properties the corrosion rate has an average of 0.718154 millimeters per year (mm / y) with soaking time of 2 weeks and 1 week removed. And the lowest corrosion rate at Cahaya Kencana TPA with an average corrosion rate of 0.131159 millimeters per year (mm / y) with a 3-week immersion time. The form of corrosion in the Gunung Kupang Landfill and Cahaya Kencana media is evenly corrosion

ANALISIS TEORITIS DAN EKSPERIMENTAL DEFLEKSI PADA KAYU DENGAN VARIASI JENIS DAN POSISI PERLETAKAN

This 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

The 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°

ANALISIS LAJU KOROSI BAJA ST-60 PADA MEDIA AIR GAMBUT DAN AIR HUJAN

The use of metals become an integral part of human life. Iron and steel is one material that is very widle used for the purposes of human life. All life segments, ranging from kitchen equipment, transportation and building skeletons using steel. The steel that is often used is inthe form of low carbon steel such as Baja ST 60. This study uses the method of weight loss or weight loss is a method that can be used to obtain the corrosion rate. The principle of this method is to calculate the amount of material lost or heavy loss after testing immersion in accordance with ASTM G 31-72 standards. Based on the analysis of the data carried out can be obtained conclusions Corrosion with variations in immersion time 3 weeks without being exposed to greater corrosiveness compared to 2 weeks with 1 week exposed because in the variation of 3 weeks without being exposed to steel longer interact with corrosion media compared to 2 weeks with presented 1 week while the corrosion rate of peat water is greater than rainwater because the pH in peat water is lower than rainwater

PENGARUH KECEPATAN LAS TERHADAP DISTORSI HASIL PENGELASAN SMAW DENGAN SIMULASI NUMERIK

This study aims to determine the effect of welding speed on the distortion of SMAW welding results. Using a welding speed of 5.21mm/s, 4mm/s, with a v seam of 60° and a welding current of 80 Amperes, using a 120 mm x 100 mm specimen. This research was conducted experimentally and in simulation at the Tadulako University Mechanical Engineering Computing and Simulation Laboratory. And simulation testing using ANSYS Workbench 15.0 with transient thermal and static structural analysis models.  The results of the welding speed test for the distortion of SMAW welding results. Shows that, the faster the welding time, the smaller the increase in the distortion value in the material, conversely, the longer the welding time, the greater the increase in the distortion value, this occurs due to the effect of welding speed. bigger and vice versa. The biggest distortion value is at a welding speed of 3.4 mm/s of 0.0125° in the experimental and 0.0095° in the numerical simulation, while the smallest distortion value is at a welding speed of 5.21 mm/s of 0.0052° in the experimental and 0.0037° in numerical simulations

PENGARUH KECEPATAN SPINDLE TERHADAP TINGKAT KEKASARAN PERMUKAAN HASIL PENGERJAAN FRAIS

The roughness value on a metal surface is one of the considerations in determining the quality of a product. In some companies the level of surface roughness is very influential to produce good assembly products. The purpose of this study was to determine the effect of spindle speed on the surface roughness of the ST-70 material through the ANOVA test method and a surface roughness measurement tool (Surface Roughness Taster). For specimens in the form of a beam with dimensions of 100 mm in length, 20 mm in width and 25 mm in height. Using a spindle speed of 300 rpm, 400 rpm, and 500 rpm. Testing using the Ammitari AR-132 tool, this research was conducted at the Mechanical Technology Laboratory, Department of Mechanical Engineering, Faculty of Engineering, University of Tadulako. In the results of milling machining with spindle speeds of 300 rpm, 400 rpm, and 500 rpm with all variables outside the main variable constant, it shows that the results of the roughness test have the highest value in the milling process of 300 rpm with an average roughness of 6.063 µm, then in the milling process of 400 rpm the average roughness value is 5.352 µm, and the lowest roughness value is in the 500rpm milling process with a roughness value of 4.901 µm. Thus, the greater the value of the spindle speed used, the lower the surface roughness value of the milling process and the finer the surface of the specimen. The results of the ANOVA analysis used are Fcount <Ftable. This means that there is a difference between the average surface roughness values at spindle speeds of 300 rpm, 400 rpm and 500 rp