scholarly journals PENGARUH JUMLAH SUDU TERHADAP KINERJA TURBIN ANGIN SUMBU VERTIKAL TIPE DARRIEUS-H NACA 3412 DENGAN SUDUT PITCH 00

INFO-TEKNIK ◽  
2018 ◽  
Vol 19 (2) ◽  
pp. 195
Author(s):  
Arif Rochman Fachrudin
Keyword(s):  
Renewable Energy ◽  
Wind Speed ◽  
Electric Power ◽  
Wind Turbines ◽  
Mechanical Energy ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Wind Speeds ◽  
Turbine Performance ◽  
The Given

Potential and utilization of renewable energy in Indonesia is still very small. Oneof the renewable energy sources is wind energy. The use of wind turbines, windenergy is converted into mechanical energy and can then generate electricitythrough a generator. Wind turbines are environmentally friendly, inexpensive,easy to operate and easy to maintain. The purpose of this study was to determinethe effect on the performance of the number of blades and wind speed for thevertical axis wind turbine type darrieus H with the NACA profile 3412 with apitch 0o angle. This study uses an experimental method, with a number of bladesand varying wind speeds. The number of blades given is 2 units, 3 units and 4units. The speed of the given wind is 3.3 m / s, 3.5 m / s, 3.7 m / s, and 3.9 m / s.Performance is obtained from the electrical power produced by a generatormounted on the turbine axis. The results showed that the turbine performance wasinfluenced by the number of blades. The highest power in the number of bladeswas 4 units at a wind speed of 3.3 m / s which resulted in electric power of 5.166Watt. The lowest electric power is produced on turbines with a number of units of2 units at a wind speed of 3.3 m / s, which is 3.0173 Watts. The blade is 2 unitsand 3 units, at a wind speed of 3.3 m / s; 3.5 m / s; 3.7 m / s and 3.9 m / s, theelectrical power produced is relatively the same, while in blades 4 units, thedifference in wind speed (3.3 m / s; 3.5 m / s; 3.7 m / s and 3.9 m / s) produce adifference in the electrical power produced

scholarly journals Features of operation of wind power stations as an supplementary source of electricity for non-traction consumers of railway electric mains

2019 ◽  
pp. 36-41
Author(s):  
Kachan Yu ◽  
Kuznetsov V
Keyword(s):  
Renewable Energy ◽  
Wind Speed ◽  
Wind Power ◽  
Wind Turbines ◽  
Power Supply ◽  
Renewable Energy Sources ◽  
Wind Farms ◽  
Energy Sources ◽  
Railway Transport ◽  
Supply Systems

Purpose. Identify the features of operation of wind farms as an auxiliary supplier of electricity for non-traction consumers of railway networks and analyze the main factors that directly affect the use of wind farms due to the random nature of wind flow and additional factors due to the above conditions in different climates. The research methodology is based on modern methods of computational mathematics, statistics and information analysis using modern computer technology. Findings. The need to use renewable energy sources in the power supply systems of non-traction consumers of railway transport is obvious. Given the constant growth of prices and tariffs for electricity in Ukraine, more and more attention is paid to its savings and the search for the cheapest and most affordable alternative sources. The authors consider issues related to the possibility of using additional generation of electricity in the power supply systems of railway transport through the use of wind turbines, including for non-traction consumers. The analysis of wind flow features in some regions of Ukraine was carried out, and the measurement of wind speed in Zaporizhia and Dnipropetrovsk regions was obtained with the help of a compact wind speed sensor manufactured by Micro-Step-MIS LLC (Russia). The obtained values of wind speed were recorded and stored digitally. The received information of the above device was processed. The authors conclude that in the case of using wind turbines as an additional power source in the networks of non-traction consumers of railway power supply systems it is economically advantageous to connect them directly to these networks and fully use all electricity produced by them, reducing its consumption from this power supply system. The originality is that the use of renewable energy sources in the power supply systems of non-traction consumers of railway transport, in particular wind turbines, is proposed. Practical implications. Introduction of wind power plants as an auxiliary supplier of electricity for non-traction consumers of railway power grids in order to minimize electricity costs. Keywords: renewable energy sources, quality of electric energy, wind power plant, power supply networks of railway transport, non-traction consumers of railway electric networks, electricity production, wind speed.

scholarly journals Evaluation of the Effect of Blades Number on the Performance of Pico Wind Turbines

2021 ◽  
Vol 8 (1) ◽  
pp. 29-39
Author(s):  
Yasir Abood ◽  
Tariq A. Ismail ◽  
Omar A. Abdulrazzaq ◽  
Haider S. Hussein
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Electrical Power ◽  
Internal Resistance ◽  
Power Coefficient ◽  
Sharp Reduction ◽  
Wind Speeds ◽  
Air Blower

In this paper, the influence of blades number on the performance of pico wind turbine was investigated by using a small-motorized axial DC fan with a rated power of 4W. Fixed streaming air blower was used as a source of wind. Varying in wind speed was accomplished by changing the distance from the blower. A resistor equals to the turbine internal resistance was utilized as a load to collect the electrical power across the load at various wind speeds and for fans of different blades (1, 2, and 5). Values of the cut-in and cut-out speeds were extracted from the power plot. Rated power was recorded, as well. The results have shown that the rated power generated by turbine has decreased due to the reduction of blades number (i.e., reduction in solidity) from 2.6W for a 5-bladed turbine to 0.665W for a 2-bladed turbine and to 0.13W for a 1-bladed turbine. Moreover, the cut-in speed (initial electrical generating speed) has increased from 4.9m/s for 5-bladed to 8m/s for 2-bladed, then to 19.15m/s for 1-bladed. These results are explained by the balancing problems during rotation (polar asymmetrical rotor), and it is seen that the reduction of blades has made a sharp reduction in power coefficient.

scholarly journals Potential of Shrouded Micro Wind Turbine

2017 ◽  
Vol 7 (2 (S)) ◽  
pp. 340
Author(s):  
Kishor Sontakke ◽  
Samir Deshmukh ◽  
Sandip Patil
Keyword(s):  
Renewable Energy ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Renewable Energy Sources ◽  
Turbine Blades ◽  
Weather Conditions ◽  
Power Coefficient ◽  
Solar Panels ◽  
Wind Speeds ◽  
Low Wind Speeds

The growing demand for electrical energy for industrial and domestic use, coupled with the limited amount of available fossil fuel reserves and its negative effects on the environment, have made it necessary to seek alternative and renewable energy sources. The use of renewable energy is promoted worldwide to be less dependent on conventional fuels and nuclear energy. Therefore research in the field is motivated to increase efficiency of renewable energy systems. This study aimed to study potential of micro wind turbine and velocity profile through shroud for low wind speeds. Although there is a greater inclination to use solar panels because of the local weather conditions, there are some practical implications that have place the use of solar panels in certain areas to an end. The biggest problem is panel stealing. Also, in some parts of the country the weather is more appropriate to apply wind turbines. Thus, this study paying attention on the design of a new concept to improve wind turbines to be appropriate for the low wind speeds in India. The concept involves the implementation of a concentrator and diffuser to a wind turbine, to increase the power coefficient. Although the wind turbine was not tested for starting speeds, the realization of the shroud should contribute to improved starting of the wind turbine at lower wind speeds. The configuration were not manufactured, but simulated with the use of a program to obtain the power production of the wind turbine over a range of wind speeds. These values were compared to measured results of an open wind turbine developed. The most important topic at hand when dealing with a shrouded wind turbine is to find out if the overall diameter or the blade diameter of the turbine should be the point of reference. As the wind turbine is situated in a shroud that has a larger diameter than the turbine blades, some researchers believe that the overall diameter should be used to calculate the efficiency. The benefits of shrouded wind turbines are discussed.

Wind is an alternative source of energy

2019 ◽  
Vol 2 (1) ◽  
pp. 40-49
Author(s):  
J. S. Gribach ◽  
O. O. Egorychev ◽  
E. V. Kurguzova
Keyword(s):  
Carbon Dioxide ◽  
Renewable Energy ◽  
Wind Power ◽  
Wind Turbines ◽  
Carbon Dioxide Emissions ◽  
Alternative Energy ◽  
Mechanical Energy ◽  
Renewable Energy Sources ◽  
Economic Benefits ◽  
Energy Sources

Introduction: today, one of the most important problems of the world economy is a limited amount of traditional fuels, due to the consumption of which the needs of humanity for energy are being met. The chapter “Introduction” contains the definition of the term “alternative energy”, which is a set of ways to generate energy when using renewable energy sources. This chapter presents the need to search for renewable energy sources that will increase the ecological potential of the territories, as well as the energy and economic component. The prospects for the use of renewable energy sources have been highlighted, among which one of the most common alternative energy sources is wind. Methods: the chapter “Methods” describes the principles of operation of wind turbines. This chapter describes in detail the process of converting wind energy into mechanical energy. Also in the chapter “Methods” is a classification of existing installations along the axis of rotation with a description of the operation of each of them and highlighted four main ways to transfer wind power to the consumer. Results and discussions: the chapter “Results and Discussions” contains information on the economic benefits of using wind turbines in Russia, as well as a list of favorable regions for the creation of wind power stations. The structure of this chapter includes information on the environmental feasibility of the use of wind power plants, since wind generators compensate for carbon dioxide emissions. Conclusion: in the “Conclusion” presents conclusions that allow you to determine the positive aspects of the use of wind turbines, which include environmental friendliness, efficiency and affordability. It should be emphasized that the wind generator compensates for carbon dioxide emissions associated with its production, so that the use of this type of installation will create the most clean environment.

ANALISA PERFORMA TURBIN ANGIN SUMBU HORISONTAL BERSUDU AIRFOIL MELALUI VARIASI JUMLAH SUDU

ROTOR ◽  
2018 ◽  
Vol 11 (2) ◽  
pp. 18
Author(s):  
Wabang A Jhon ◽  
Abanat D.J Jufra ◽  
Hattu Edwin
Keyword(s):  
Wind Speed ◽  
Kinetic Energy ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Mechanical Energy ◽  
Coefficient Of Performance ◽  
Research Activity ◽  
Average Wind Speed ◽  
Wind Speeds ◽  
Average Wind

Indonesia is an area that has the potential for sufficient wind resources to be utilized for kinetic energy into other energy such as mechanical energy and electrical energy through its generators (generators). The way to utilize wind kinetic energy into other energy is through a device called a wind turbine. Wind turbines have been around since ancient times, and are called airfoil angled wind turbines. This airfoil wind turbine is designed only for areas with average wind speeds above 6m / s. While in Indonesia not all regions have the same wind speed. In certain seasons, the average wind speed is below 6 m / s. This has become a major problem in regions that have average wind speeds below 6 m / s. Seeing this condition, there is a need for scientific research to obtain wind turbines that can be used in areas with average wind speeds below 5m / s. For this reason, the research I want to do is get a wind turbine that can be used as a power plant in areas that have wind speeds below 6m / s. This research was conducted on the basis of scientific theory in fluid mechanics regarding the sweeping area of wind turbines and the performance of variations in the number of blades in the wind. In addition, the research in several scientific journals was used as the basis of this research This research method is an experimental method, in the form of testing a wind turbine axis prototype horizontal and airfoil axis. The details of the research activity are the design and manufacture of laboratory scale horizontal airfoil axis turbines. Next, testing with a fan as a source of wind. The fan used has three variations of speed, all of which are used to determine the lowest average wind speed that can be applied. The results of the research are where wind turbines with the greatest torque and power and the Coefficient of Performance (CP) with the highest value will be used as a result to be applied to the community. Based on experimental data, it can be concluded that the greatest torque and power occur in turbines with 4 blades with details at speed 1, the largest torque and power are 0.201 Nm and 4.5 W; at speed 2, the biggest torque and power are 0.25 Nm and 7.21 W; at speed 3, the biggest torque and power are 0.28 Nm and 8.35 W Keywords: wind turbine, airfoil, nozzle, diffuser

Study of the Flow Over Wind Turbine Blade

2010 ◽  
Author(s):  
R. S. Amano ◽  
R. J. Malloy
Keyword(s):  
Renewable Energy ◽  
Wind Speed ◽  
Wind Energy ◽  
Cross Sections ◽  
Low Cost ◽  
Renewable Energy Sources ◽  
Optimization Technique ◽  
Direct Result ◽  
Wind Speeds ◽  
Computational Fluid Dynamics Cfd

Recently there has been an increase in the demand for the utilization of clean renewable energy sources. This is a direct result of the volatility in oil prices and an increased awareness of human induced climate change. Wind energy has been shown to be one of the most promising sources of renewable energy. With current technology, the low cost of wind energy is competitive with more conventional sources of energy such as coal. Most blades available for commercial grade wind turbines incorporate a straight span-wise profile and airfoil shaped cross sections. These blades are found to be very efficient at lower wind speeds in comparison to the potential energy that can be extracted. However as the oncoming wind speed increases the efficiency of the blades decreases as they approach a stall point. This paper explores the possibility of increasing the efficiency of the blades at higher wind speeds while maintaining efficiency at the lower wind speeds. The design intends to maintain efficiency at lower wind speeds by selecting the appropriate orientation and size of the airfoil cross sections based on a low oncoming wind speed and given constant rotation rate. The blades will be made more efficient at higher wind speeds by implementing a swept blade profile. The torque generated from a blade using only the first optimization technique is compared to that generated from a blade using both techniques as well as that generated by NTK500/41 turbine using LM19.1 blades. Performance will be investigated using the computational fluid dynamics (CFD).

scholarly journals OPTIMALISASI PEMANFAATAN DATA ARAH DAN KECEPATAN ANGIN POLA MONSUNAL UNTUK KAJIAN PEMETAAN POTENSI ENERGI ANGIN DI WILAYAH NUSA TENGGARA BARAT

2019 ◽  
Vol 3 ◽  
pp. 14
Author(s):  
Abdul Hamid Al Habib ◽  
Kholis Nur Cahyo ◽  
Prasetyo Umar Firdiyanto ◽  
Paulus Agus Winarso
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Wind Turbines ◽  
Electrical Power ◽  
The West ◽  
Wind Speeds ◽  
Wind Potential ◽  
High Winds ◽  
Turbine Installation ◽  
Potential Area

<p class="AbstractEnglish"><strong>Abstract:</strong>  The National Institute of Aeronautics and Space (LAPAN) as of July 18 2017 released data that from 166 locations studied, there were 35 locations that had good wind potential with wind speeds above 5 meters per second at a height of 50 meters. Regions that have good wind speeds, one of which is West Nusa Tenggara (NTB). West Nusa Tenggara is an area that is crossed by monsunal wind patterns and is an island surrounded by beaches so that the West Nusa Tenggara region receives high winds. This can potentially be installed by wind turbines to be able to convert wind energy into electricity. Wind direction and speed data obtained from satellites are processed into average data then adjusted to the wind speed threshold that can rotate wind turbines. The results obtained are mapped using the GrADS application to determine the potential area for horizontal axis type wind turbine installation at a height of 10 meters based on monsunal pattern direction and wind speed. This study will provide recommendations on potential areas of wind energy and predictions of electrical power that will be generated from the use of these maps. The results of the study show that the West Nusa Tenggara region by utilizing wind energy can create electricity in a year totaling 14067.4026 kWh.</p><p class="KeywordsEngish"><strong>Abstrak:</strong> Lembaga Penerbangan dan Antariksa Nasional (LAPAN) per <strong><em>18 Juli 2017</em></strong> merilis data bahwa dari 166 lokasi yang diteliti, terdapat 35 lokasi yang mempunyai potensi angin yang bagus dengan kecepatan angin diatas 5 meter perdetik pada ketinggian 50 meter. Daerah yang mempunyai kecepatan angin bagus tersebut, salah satunya adalah wilayah Nusa Tenggara Barat (NTB). Nusa Tenggara Barat merupakan wilayah yang dilintasi oleh pola angin monsunal dan merupakan pulau yang dikelilingi oleh pantai sehingga wilayah Nusa Tenggara Barat menerima hembusan angin yang cukup tinggi. Hal ini dapat berpotensi untuk dipasang turbin angin untuk dapat mengkonversi energi angin menjadi energi listrik. Data arah dan kecepatan angin yang diperoleh dari satelit diolah menjadi data rata-rata kemudian disesuaikan ke dalam batas ambang kecepatan angin yang dapat memutar turbin angin. Hasil yang diperoleh tersebut dipetakan dengan menggunakan aplikasi GrADS guna menetukan wilayah yang berpotensi untuk pemasangan turbin angin jenis sumbu horizontal pada ketinggian 10 meter berdasarkan arah dan kecepatan angin pola monsunal. Penelitian ini akan memberikan rekomendasi wilayah potensi energi angin serta prediksi daya listrik yang akan dihasilkan dari pemanfaatan peta tersebut. Hasil penelitian menunjukan wilayah Nusa Tenggara Barat dengan memanfaatkan energi angin dapat menciptakan energi listrik dalam setahun berjumlah 14067.4026 kWh.</p>

scholarly journals Analysis of the Wind Turbine Selection for the Given Wind Conditions

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7740
Author(s):  
Waldemar Kuczyński ◽  
Katarzyna Wolniewicz ◽  
Henryk Charun
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Wind Farm ◽  
Medium Size ◽  
Wind Speeds ◽  
The North ◽  
Wind Measurements ◽  
Hourly Distribution ◽  
The Given

The aim of the current paper is to present an approach to a wind turbine selection based on an annual wind measurements. The proposed approach led to a choice of an optimal device for the given wind conditions. The research was conducted for two potential wind farm locations, situated on the north of Poland. The wind measurements pointed out a suitability of the considered localizations for a wind farm development. Six types of wind turbines were investigated in each localization. The power of the wind turbines were in the range of 2.0 to 2.5 MW and with a medium size of the rotor being in the range of 82 to 100 m. The purpose of the research was to indicate a wind turbine with the lowest sensitivity to the variation of wind speed and simultaneously being most effective energetically. The Weibull density distribution was used in the analyses for three values of a shape coefficients k. The energy efficiency of the considered turbines were also assessed. In terms of the hourly distribution of the particular wind speeds, the most effective wind turbines were those with a nominal power of 2 MW, whereas the least effective were those with the nominal power of 2.3–2.5 MW. The novelty of the proposed approach is to analyze the productivity for many types of wind turbines in order to select the one which is the most effective energy producer. The analyses conducted in the paper allowed to indicate a wind turbine which generates the highest amount of energy independently on the wind speed variation.

scholarly journals Turbin angin poros vertikal tipe Savonius bertingkat dengan variasi posisi sudut

2016 ◽  
Vol 6 (2) ◽  
Author(s):  
I.B. Alit ◽  
Nurchayati Nurchayati ◽  
S.H. Pamuji
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Wind Turbine ◽  
Electric Power ◽  
Rotor Blade ◽  
Rotation Speed ◽  
Simple Construction ◽  
Wind Speeds ◽  
Turbine Performance ◽  
Low Wind Speeds

Wind turbine is a technology that converts wind energy to electric power. A Savonius type rotor blade is a simple wind turbine that operates on the concept of drag. The turbine has a potential to be developed as it has a simple construction and it is suitable for low wind speeds. Savonius rotor can be designed with two or three blades in single level or multi-levels. This research was conducted to obtain two levels wind turbine performance characteristics with variations in wind speed and different positions of angle on each level. The variations of the angle position of the wind turbine were 0°, 30°, 45°, 60°, and 90° in each stage. The result shows that the performance of the wind turbine is inversely to the degree of the angle position. The maximum rotation speed of the rotor was about 150.6 rpm that was generated at the wind speed of 5 m/s and the angle position of 0°. 

scholarly journals Comparative Analysis of Taper and Taperless Blade Design for Ocean Wind Turbines in Ciheras Coastline, West Java

Kapal ◽  
2020 ◽  
Vol 18 (1) ◽  
pp. 8-17
Author(s):  
Madi Madi ◽  
Tuswan Tuswan ◽  
Ilham Dwi Arirohman ◽  
Abdi Ismail
Keyword(s):  
Wind Turbines ◽  
Mechanical Energy ◽  
Electrical Power ◽  
Mechanical Power ◽  
Wind Speeds ◽  
Sea Wind ◽  
And Performance ◽  
Performance Results ◽  
Turbine Design ◽  
Ocean Wind

The blade is the most critical part of turbine design because it is used to convert kinetic to mechanical energy. In general, the blade types used for ocean wind turbines are taper and taperless blades, like those operated at Ciheras Coastline. Previous research has been analyzed the type of airfoil used in designing taper blades for ocean wind turbines using NACA 4412, which was selected as the optimal foil configuration at sea wind speeds of 12 m/s. In this study, the comparison of taper and taperless blade designs using NACA 4412 at a wind speed of 12 m/s is analyzed. The comparative study with previous research has been carried out and resulted in the same graphical patterns and performance results. In this study, the focus is on investigating the performance coefficient of power, mechanical power, and electrical power. The final result shows that taper blade designs are highly recommended for use in ocean wind turbines compared to taperless blades. In general, the performance produced by taper blades is more significant than taperless blades at relatively high wind speeds. The maximum performance coefficient of power, mechanical power, and electrical power generated by the taper blades in sequent are 0.47, 1535 watts, and 786 watts, while the taperless blades have 0.44, 1437 watts, and 736 watts.

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