Output power, speed, and efficiency of water turbines are affected by the curvature angle of the ... more Output power, speed, and efficiency of water turbines are affected by the curvature angle of the blade; this is because the energy of water flowing is absorbed by the blade of turbine. In this paper, the curvature angle of the blade of Banki's water turbine model is investigated to obtain the highest output power, speed, and efficiency of the water turbine. The experimental model is used to investigate the curvature angle of the blade. The result shows that 15° provides a higher output of power, speed, and efficiency than 16°. This is even though 16° is commonly used for commercial production. In this research, “Banki's model produces a maximum of 132 RPM (Revolution Per Minute). The result of multiplying the diameter of the turbine with a generator pulley diameter is equal to 14.
The use of wind energy as an electric energy generator is increasing to overcome the limitations ... more The use of wind energy as an electric energy generator is increasing to overcome the limitations of conventional energy and reduce the greenhouse-effect pollution. Indonesia has considerable potential for wind energy but wind energy is very dependent on fluctuating wind speeds. To improve the efficiency of a wind energy conversion system (WECS), at each wind speed, the WECS must be able to extract the maximum power so that a controller is needed. This paper presents the Particle Swarm Optimization (PSO) algorithm to extract the maximum power on the Permanent Magnet Synchronous Generator (PMSG) standalone wind turbine system through controlling the duty cycle of the buck converter. Based on the simulation result, the PSO algorithm can follow rapid wind speed changes and extracted maximum power at each wind speed. In addition, the PSO algorithm can maintain the power conversion coefficient at the optimal value for rapid wind speed changes. Compared by WECS without power extraction, the PSO algorithm has better performance and bigger output power.
The characteristics of pressure and nozzle angle are an important aspect of the nest-lie turbine ... more The characteristics of pressure and nozzle angle are an important aspect of the nest-lie turbine in order to produce maximum RPM. The goal is to design a small-capacity turbine with high efficiency for the limited flow of water throughout the year. This research was carried out through the following stages: (1) designing a turbine, (2) creating a prototype turbine nest-lie, (3) taking measurements, and (4) analyzing the measurement data. At a water pressure of 20 psi, the nest-lie model turbine yielded a maximum RPM of 71.07 for pump A at a nozzle angle of 25.5°, an RPM of 65.50 for pump B at a nozzle angle of 27°, and an RPM of 119.21 for the combination of pumps A and B at a nozzle angle of 27°. At the nozzle 0° position against the turbine axis, the nozzle was set to 240, resulting in a maximum RPM of 170.52 at 28 psi pressure. This suggests that the higher the air pressure, the higher the resulting RPM from the volume of air held in the nest-lie.
These days technology has developed rapidly, almost covering all aspects in humas life for exampl... more These days technology has developed rapidly, almost covering all aspects in humas life for example is automation system. The automation system works without human intervension and complete all works independently. Existing technology can already be connected to each other via the internet network so that it can transmit or receive data automatically. The Internet of Things (IoT) can support automated systems by providing real-time information so that users can monitor the performance of these automated systems. This research was to develop rabbit cage by utilizing microcontroller as monitoring system. The system utilizing Internet of Things (IoT) as monitoring medium between users and devices to help users monitor their rabbit cage remotely. The design installed several sensors such as ultrasonic, temperature, load cell sensors, DS18B20 and water level sensors. This research used Arduino Mega 2560 as main microcontroller and NodeMCU ESP8266 as communication device between the tools ...
The limitation of fossil fuels for electricity generation is a very important problem faced today... more The limitation of fossil fuels for electricity generation is a very important problem faced today, so that the use of renewable energy is increasing. The photovoltaic system is an electrical energy generator that converts solar energy into electrical energy. The use of PV is increasing because it is pollution-free, free, and low maintenance. However, PV has low conversion efficiency and an increase in PV efficiency can be achieved if it works at the maximum power point (MPP). So it's needed a maximum power point tracking (MPPT) controller. In this article, a modified P&O (MP&O) MPPT controller is designed for a standalone PV system using a boost converter. MP&O finds the MPP by adjusting the duty cycle of the boost converter based on current and voltage measurements. Based on the simulation results, the MP&O MPPT algorithm has a better performance than P&O. MP&O can follow changes in irradiance and produce greater maximum power and faster tracking time than the P&O algorithm. For some irradiance conditions, MP&O can achieve an average efficiency of 92.65% while P&O is 83.45%.
The technology of wind turbines as electric power plants has developed very rapidly because renew... more The technology of wind turbines as electric power plants has developed very rapidly because renewable energy is environmentally friendly and has unlimited availability. The use of wind energy conversion systems for the grid non-connected areas has greatly benefits for the community, in which small scale standalone wind turbine systems are well suited to rural areas due to low investment costs and are easily controlled to improve efficiency. However, wind speed highly interfere the output power of the wind turbine. The efficiency of wind turbine can be improved by extracting the maximum power point to get optimal power. In this paper will propose an optimal power extraction control for small scale stand alone wind turbine using permanent magnet synchronous generator (PMSG) based on fuzzy logic controller (FLC) without mechanical sensors. Fuzzy logic determines the optimum power point through the duty cycle controlling on the dc/dc converter based on the uncontrolled rectifier output voltage and current. Based on the simulation results, FLC has better performance, where FLC can capture greater output power than perturb & observe (P&O) method. At wind speeds of 10 m/s, the use of FLC can extract wind power of 4200W while the P&O method is 3700W. In addition, FLC can extract optimum power to wind speeds variation and generate no oscillations.
Peningkatan suatu kualitas baik produk maupun proses dapat dilakukan dengan menerapkan proses aud... more Peningkatan suatu kualitas baik produk maupun proses dapat dilakukan dengan menerapkan proses audit. Salah satu proses audit yang dapat dilakukan adalah dengan mengidentifikasi adanya suatu pemborosan. Pemborosan itu sendiri merupakan suatu proses yang tidak bernilai tambah. Metode audit yang digunakan untuk mengidentifikasi terdapatnya pemborosan adalah Lean. Penentuan dan eliminasi suatu proses yang tidak memberikan suatu nilai tambah merupakan fokus utama dari Lean. Dalam penerapannya, Lean memiliki metode untuk mengidentifikasi suatu pemborosan, metode tersebut adalah Waste Assessment Model (WAM). Penerapan WAM difokuskan untuk mengidentifikasi pemborosan dalam proses perencanaan anggaran menggunakan sistem SILUNA pada Bagian Perencanaan di Biro Perencanaan dan Keuangan Universitas Udayana. Penelitian ini mendapatkan hasil berupa 2 (dua) pemborosan dengan nilai paling tinggi, yaitu : defect merupakan waste urutan pertama dengan persentase 19,79% dan waste yang berada pada urutan...
MHPP is a run of river hydroelectric power plant type, that does not require a large dam or water... more MHPP is a run of river hydroelectric power plant type, that does not require a large dam or water discharge, but rather diverts the flow rate of water into a channel. Vortex turbine utilizes whirlpool of water obtained from the spiral basin shape to push the turbine to rotate. The reason of this research was to decide the design of the MHPP prototype using a vortex turbine. This prototype is a miniature or laboratory scale. This research is designed to model the MHPP prototype using a Vortex turbine which is helpful for learning before it is implemented directly to the river. In this study, the prototype MHPP with vortex turbine was designed with a 0.3 m head, 1.5 dim input pipe, 4.5 L/s water flow, basin with an upper diameter of 40 cm, 40 cm height and 12 cm outlet and 41° cone angle. The runner blade design has 9 blades with a runner outer diameter of 15 cm, 5 cm neck diameter, and 5 cm runner width. This prototype is able to generate power of 0.387 Watt and has an efficiency of ...
Output power, speed, and efficiency of water turbines are affected by the curvature angle of the ... more Output power, speed, and efficiency of water turbines are affected by the curvature angle of the blade; this is because the energy of water flowing is absorbed by the blade of turbine. In this paper, the curvature angle of the blade of Banki's water turbine model is investigated to obtain the highest output power, speed, and efficiency of the water turbine. The experimental model is used to investigate the curvature angle of the blade. The result shows that 15° provides a higher output of power, speed, and efficiency than 16°. This is even though 16° is commonly used for commercial production. In this research, “Banki's model produces a maximum of 132 RPM (Revolution Per Minute). The result of multiplying the diameter of the turbine with a generator pulley diameter is equal to 14.
The use of wind energy as an electric energy generator is increasing to overcome the limitations ... more The use of wind energy as an electric energy generator is increasing to overcome the limitations of conventional energy and reduce the greenhouse-effect pollution. Indonesia has considerable potential for wind energy but wind energy is very dependent on fluctuating wind speeds. To improve the efficiency of a wind energy conversion system (WECS), at each wind speed, the WECS must be able to extract the maximum power so that a controller is needed. This paper presents the Particle Swarm Optimization (PSO) algorithm to extract the maximum power on the Permanent Magnet Synchronous Generator (PMSG) standalone wind turbine system through controlling the duty cycle of the buck converter. Based on the simulation result, the PSO algorithm can follow rapid wind speed changes and extracted maximum power at each wind speed. In addition, the PSO algorithm can maintain the power conversion coefficient at the optimal value for rapid wind speed changes. Compared by WECS without power extraction, the PSO algorithm has better performance and bigger output power.
The characteristics of pressure and nozzle angle are an important aspect of the nest-lie turbine ... more The characteristics of pressure and nozzle angle are an important aspect of the nest-lie turbine in order to produce maximum RPM. The goal is to design a small-capacity turbine with high efficiency for the limited flow of water throughout the year. This research was carried out through the following stages: (1) designing a turbine, (2) creating a prototype turbine nest-lie, (3) taking measurements, and (4) analyzing the measurement data. At a water pressure of 20 psi, the nest-lie model turbine yielded a maximum RPM of 71.07 for pump A at a nozzle angle of 25.5°, an RPM of 65.50 for pump B at a nozzle angle of 27°, and an RPM of 119.21 for the combination of pumps A and B at a nozzle angle of 27°. At the nozzle 0° position against the turbine axis, the nozzle was set to 240, resulting in a maximum RPM of 170.52 at 28 psi pressure. This suggests that the higher the air pressure, the higher the resulting RPM from the volume of air held in the nest-lie.
These days technology has developed rapidly, almost covering all aspects in humas life for exampl... more These days technology has developed rapidly, almost covering all aspects in humas life for example is automation system. The automation system works without human intervension and complete all works independently. Existing technology can already be connected to each other via the internet network so that it can transmit or receive data automatically. The Internet of Things (IoT) can support automated systems by providing real-time information so that users can monitor the performance of these automated systems. This research was to develop rabbit cage by utilizing microcontroller as monitoring system. The system utilizing Internet of Things (IoT) as monitoring medium between users and devices to help users monitor their rabbit cage remotely. The design installed several sensors such as ultrasonic, temperature, load cell sensors, DS18B20 and water level sensors. This research used Arduino Mega 2560 as main microcontroller and NodeMCU ESP8266 as communication device between the tools ...
The limitation of fossil fuels for electricity generation is a very important problem faced today... more The limitation of fossil fuels for electricity generation is a very important problem faced today, so that the use of renewable energy is increasing. The photovoltaic system is an electrical energy generator that converts solar energy into electrical energy. The use of PV is increasing because it is pollution-free, free, and low maintenance. However, PV has low conversion efficiency and an increase in PV efficiency can be achieved if it works at the maximum power point (MPP). So it's needed a maximum power point tracking (MPPT) controller. In this article, a modified P&O (MP&O) MPPT controller is designed for a standalone PV system using a boost converter. MP&O finds the MPP by adjusting the duty cycle of the boost converter based on current and voltage measurements. Based on the simulation results, the MP&O MPPT algorithm has a better performance than P&O. MP&O can follow changes in irradiance and produce greater maximum power and faster tracking time than the P&O algorithm. For some irradiance conditions, MP&O can achieve an average efficiency of 92.65% while P&O is 83.45%.
The technology of wind turbines as electric power plants has developed very rapidly because renew... more The technology of wind turbines as electric power plants has developed very rapidly because renewable energy is environmentally friendly and has unlimited availability. The use of wind energy conversion systems for the grid non-connected areas has greatly benefits for the community, in which small scale standalone wind turbine systems are well suited to rural areas due to low investment costs and are easily controlled to improve efficiency. However, wind speed highly interfere the output power of the wind turbine. The efficiency of wind turbine can be improved by extracting the maximum power point to get optimal power. In this paper will propose an optimal power extraction control for small scale stand alone wind turbine using permanent magnet synchronous generator (PMSG) based on fuzzy logic controller (FLC) without mechanical sensors. Fuzzy logic determines the optimum power point through the duty cycle controlling on the dc/dc converter based on the uncontrolled rectifier output voltage and current. Based on the simulation results, FLC has better performance, where FLC can capture greater output power than perturb & observe (P&O) method. At wind speeds of 10 m/s, the use of FLC can extract wind power of 4200W while the P&O method is 3700W. In addition, FLC can extract optimum power to wind speeds variation and generate no oscillations.
Peningkatan suatu kualitas baik produk maupun proses dapat dilakukan dengan menerapkan proses aud... more Peningkatan suatu kualitas baik produk maupun proses dapat dilakukan dengan menerapkan proses audit. Salah satu proses audit yang dapat dilakukan adalah dengan mengidentifikasi adanya suatu pemborosan. Pemborosan itu sendiri merupakan suatu proses yang tidak bernilai tambah. Metode audit yang digunakan untuk mengidentifikasi terdapatnya pemborosan adalah Lean. Penentuan dan eliminasi suatu proses yang tidak memberikan suatu nilai tambah merupakan fokus utama dari Lean. Dalam penerapannya, Lean memiliki metode untuk mengidentifikasi suatu pemborosan, metode tersebut adalah Waste Assessment Model (WAM). Penerapan WAM difokuskan untuk mengidentifikasi pemborosan dalam proses perencanaan anggaran menggunakan sistem SILUNA pada Bagian Perencanaan di Biro Perencanaan dan Keuangan Universitas Udayana. Penelitian ini mendapatkan hasil berupa 2 (dua) pemborosan dengan nilai paling tinggi, yaitu : defect merupakan waste urutan pertama dengan persentase 19,79% dan waste yang berada pada urutan...
MHPP is a run of river hydroelectric power plant type, that does not require a large dam or water... more MHPP is a run of river hydroelectric power plant type, that does not require a large dam or water discharge, but rather diverts the flow rate of water into a channel. Vortex turbine utilizes whirlpool of water obtained from the spiral basin shape to push the turbine to rotate. The reason of this research was to decide the design of the MHPP prototype using a vortex turbine. This prototype is a miniature or laboratory scale. This research is designed to model the MHPP prototype using a Vortex turbine which is helpful for learning before it is implemented directly to the river. In this study, the prototype MHPP with vortex turbine was designed with a 0.3 m head, 1.5 dim input pipe, 4.5 L/s water flow, basin with an upper diameter of 40 cm, 40 cm height and 12 cm outlet and 41° cone angle. The runner blade design has 9 blades with a runner outer diameter of 15 cm, 5 cm neck diameter, and 5 cm runner width. This prototype is able to generate power of 0.387 Watt and has an efficiency of ...
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