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

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

INFO-TEKNIK ◽

10.20527/jit.v19i2.153 ◽

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

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Pengaruh diameter dan jumlah sudu turbin angin savonius tipe L terhadap unjuk kerja yang dihasilkan

ARMATUR : Artikel Teknik Mesin & Manufaktur ◽

10.24127/armatur.v1i2.333 ◽

2020 ◽

Vol 1 (2) ◽

pp. 61-67

Author(s):

Mohammad Rizqi Saputra ◽

Nur Kholis ◽

Mohammad Munib Rosadi

Keyword(s):

Energy Source ◽

Wind Turbine ◽

Wind Turbines ◽

Mechanical Energy ◽

Simulation Method ◽

Wind Speeds ◽

Turbine Efficiency ◽

Analysis Technique ◽

Low Wind Speeds ◽

Wind Source

Abstract Wind is a renewable mechanical energy source that can be used as an energy source because the energy from the wind can be used to drive wind turbines. Savonius wind turbine type L is a tool to convert wind energy into electricity with a simple construction and can work with low wind speeds. The purpose of this study was to determine the effect of differences in diameter and number of blades on the power produced. The method used is a simulation method with an artificial wind source. With a wind speed of 8 m/s. The data analysis technique used is 2-way ANOVA using the SPSS application. Variations used are 20 cm and 40 cm in diameter and the number of blades 2 and 4 . The result is a wind turbine with a variation of 40 cm and 4 blades capable of producing the best output which produces 350.98 RPM voltage of 11.64 volts current of 0.144 amperes and power of 1,676 watts. As for BHP, torque, and turbine efficiency with a variation of 40 cm and 4 blades capable of producing the best output where the generated BHP is 3.352 watts, torque 0.091 N / m efficiency 2.17. For the results of calculations with SPSS wind turbines with a diameter variation of 40 cm and 4 blades, the biggest power is 1,744 watts and for BHP produces 3.3520 watts and the efficiency reaches 2.17%. Keyword : Diameter, number of blade, Performance Abstrak Angin adalah sumber energi mekanik yang bisa diperbaharui sehingga dapat dimanfaatkan sebagai sumber energi karena dapat digunakan untuk menggerakkan turbin angin. Turbin angin savonius tipe L merupakan alat untuk mengubah energi angin menjadi listrik dengan konstruksi yang sederhana dan dapat bekerja dengan kecepatan angin yang rendah. Tujuan penelitian ini untuk mengetahui pengaruh perbedaan diameter dan jumlah sudu terhadap unjuk kerja yang dihasilkan. Metode yang digunakan adalah metode simulasi dengan sumber angin buatan. Dengan kecepatan angin 8 m/s. Teknik analisis data yang digunakan adalah ANOVA 2 arah dengan menggunakan aplikasi SPSS. Variasi yang digunakan adalah diameter 20 cm dan 40 cm serta jumlah sudu 2 dan 4. Hasilnya turbin angin dengan variasi 40 cm dan 4 sudu mampu menghasilkan output terbaik yang dimana menghasilkan RPM 350,98 tegangan 11,64 volt arus 0,144 ampere dan daya 1,676 watt. Sedangkan untuk BHP, torsi, dan efisensi turbin dengan variasi 40 cm dan 4 sudu mampu menghasilkan output yang terbaik dimana BHP yang dihasilkan adalah 3,352 watt, torsi 0,091 N/m efisisensi 2,17. Untuk hasil perhitungan dengan SPSS turbin angin dengan variasi diameter 40 cm dan 4 sudu menghasilkan daya terbesar yakni 1,744 watt dan untuk BHP menghasilkan 3,3520 watt dan efisiensinya mencapai 2,17 % untuk torsi tertinggi dicapai turbin variasi 40 cm 2 sudu dengan torsi 0,116. Kata kunci : diameter, jumlah sudu, unjuk kerja

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Wind Catcher Technology: The Impact of Tower Cross Section and Turbine on Wind Power Harnessing

ASME 2019 Power Conference ◽

10.1115/power2019-1947 ◽

2019 ◽

Cited By ~ 1

Author(s):

Jonathan C. Corbett ◽

Navid Goudarzi ◽

Mohammadamin Sheikhshahrokhdehkordi

Keyword(s):

Wind Power ◽

Wind Turbines ◽

Cross Sections ◽

Natural Ventilation ◽

Performance Metrics ◽

Urban Environments ◽

Ducted Turbine ◽

And Performance ◽

Turbine Design ◽

The Impact

Abstract This research explores utilizing distributed wind turbines in the built environment computationally. The targeted wind turbine design is an unconventional ducted turbine, called Wind Tower technology that its operation and performance metrics have been studied in earlier works in the team. Wind Tower is an established architectural technology that operates by catching wind and directing it into buildings, providing natural ventilation to support HVAC systems, and thus reducing cooling costs in urban environments. Wind power has long struggled to meet expectations in built (urban) environments. By combining wind towers at different cross sections with wind turbines, one might develop a device which provides natural ventilation and produces power in spite of a hostile wind environment. The preliminary results suggest that the maximum potential for a wind tower-turbine combination appears to be 700-1.46 kW under idealized conditions with a 4 m/s site dominant wind speed. This suggests that wind towers might be viable for power harvesting in both remote and grid connected regions. Further analysis suggested that additional turbine performance enhancements are needed to bring the turbine real power production closer to that ideal.

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Numerical Modeling of the Effects of Leading-Edge Erosion and Trailing-Edge Damage on Wind Turbine Loads and Performance

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.4048451 ◽

2020 ◽

Vol 142 (11) ◽

Author(s):

Francesco Papi ◽

Lorenzo Cappugi ◽

Sebastian Perez-Becker ◽

Alessandro Bianchini

Keyword(s):

Wind Turbine ◽

Wind Turbines ◽

Prolonged Exposure ◽

Leading Edge ◽

Future Generation ◽

Operating Conditions ◽

Wind Speeds ◽

And Performance ◽

Lift And Drag ◽

The Impact

Abstract Wind turbines operate in challenging environmental conditions. In hot and dusty climates, blades are constantly exposed to abrasive particles that, according to many field reports, cause significant damages to the leading edge. On the other hand, in cold climates similar effects can be caused by prolonged exposure to hail and rain. Quantifying the effects of airfoil deterioration on modern multi-MW wind turbines is crucial to correctly schedule maintenance and to forecast the potential impact on productivity. Analyzing the impact of damage on fatigue and extreme loading is also important to improve the reliability and longevity of wind turbines. In this work, a blade erosion model is developed and calibrated using computational fluid dynamics (CFD). The Danmarks Tekniske Universitet (DTU) 10 MW Reference Wind Turbine is selected as the case study, as it is representative of the future generation wind turbines. Lift and Drag polars are generated using the developed model and a CFD numerical setup. Power and torque coefficients are compared in idealized conditions at two wind speeds, i.e., the rated speed and one below it. Full aero-servo-elastic simulations of the turbine are conducted with the eroded polars using NREL's BEM-based code OpenFAST. Sixty-six 10-min simulations are performed for each stage of airfoil damage, reproducing operating conditions specified by the IEC 61400-1 power production DLC-group, including wind shear, yaw misalignment, and turbulence. Aeroelastic simulations are analyzed, showing maximum decreases in CP of about 12% as well as reductions in fatigue and extreme loading.

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Circulation Controlled Airfoil Analysis Through 360 Degrees Angle of Attack

ASME 2009 3rd International Conference on Energy Sustainability, Volume 1 ◽

10.1115/es2009-90341 ◽

2009 ◽

Cited By ~ 1

Author(s):

Henry Z. Graham ◽

Meagan Hubbell ◽

Chad Panther ◽

Jay Wilhelm ◽

Gerald M. Angle ◽

...

Keyword(s):

Power Generation ◽

Wind Turbines ◽

Electrical Power ◽

Vertical Axis ◽

Reynolds Numbers ◽

Experimental Investigations ◽

Circulation Control ◽

Wind Speeds ◽

Wide Range ◽

Turbine Shaft

Wind turbines are a source of renewable energy with an endless supply. The most efficient types of wind turbines operate by utilizing the lift force of its blades to create a rotational force. The power capabilities of a wind turbine are tied to the blades’ ability to convert the aerodynamic forces into rotational energy. Vertical axis wind turbines (VAWT), unlike the more common horizontal axis (HAWT) type, do not need to be directed into the wind and can place the transmission and electrical power generation components at the bottom of the turbine shaft, near the ground. Currently VAWTs cannot feather or pitch the blades, in the same fashion as a HAWT, for a lift change to control power generation and/or rotational speed at different or changing wind speeds. A method of increasing the lift of a blade without physically moving the blade is to use circulation control (CC), via a blowing slot over a rounded trailing edge. The CC air flow entrains the air around the blade to create more lift. Adding an actuated valve for the blowing slot allows a CC-VAWT to control the amount of lift generated, as well as the location of the augmentation relative to the wind direction, resulting in augmented power generation. In order to study the performance capabilities of a CC-VAWT, a NACA0018 blade was modified to incorporate circulation control. This modified shape was analyzed using computational fluid dynamics at two Reynolds numbers and a wide range of angles of attack. The lift to drag ratio of the CC-VAWT blade shows benefits at low Reynolds numbers over a NACA0018 blade for post stall angles of attack, but there is a decrease in the lift to drag before stall due to a significant increase in drag of the circulation control models. Further CFD refinement and experimental investigations are recommended to validate the predicted effects circulation control will have on the performance of a VAWT.

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

Iraqi Journal of Industrial Research ◽

10.53523/ijoirvol8i1id20 ◽

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.

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Design and Performance Evaluation of Low-Speed Vertical Axis Wind Turbines with Wind Boosters using CFD Analysis

SMART MOVES JOURNAL IJOSCIENCE ◽

10.24113/ijoscience.v7i12.448 ◽

2021 ◽

pp. 34-45

Author(s):

Sardar Karanjeet Singh ◽

Shravan Vishwakarma

Keyword(s):

Wind Turbines ◽

Mechanical Energy ◽

Vertical Axis ◽

Rotor Blades ◽

Coefficient Of Performance ◽

Vertical Axis Wind Turbine ◽

Vertical Axis Wind Turbines ◽

Cad Modelling ◽

Mechanical Durability ◽

And Performance

The use of wind based energy is quickly expanding over the planet. The goal of this study is to use computational methods of fluid dynamics to develop a novel model of VAWT including Windbooster for various rotor blades like two, three, and four blades in order to enhance effectiveness. CAD modelling approaches of vertical axis wind turbines including and excluding booster are created. Including all vertical axis wind turbine blade designs including and excluding booster, torque, power, and Coefficient of performance are compared.The performance of three blades on the basis of mechanical properties includingi wind amplifier is 29.9% greater than two blades using wind amplifier, and four blades using wind amplifier is 21.5 percent greater than three blades using wind amplifier, according to the findings. Because the mechanical energy created by a four-blade wind booster wasn't as great as it is including three blades, VAWT employing three-blade wind booster seems to be more effective than VAWT with a two- or four-blade wind booster. For improved mechanical durability, VAWT with three-blade wind amplifier is recommended.

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Load Calculation on Wind Turbines: Validation of Flex5, Alaska/Wind, MSC.Adams and SIMPACK by Means of Field Tests

Volume 7: 2nd Biennial International Conference on Dynamics for Design; 26th International Conference on Design Theory and Methodology ◽

10.1115/detc2014-34670 ◽

2014 ◽

Cited By ~ 5

Author(s):

János Zierath ◽

Roman Rachholz ◽

Christoph Woernle ◽

Andreas Müller

Keyword(s):

Wind Turbine ◽

Wind Turbines ◽

Electrical Power ◽

Great Influence ◽

Field Tests ◽

Early Application ◽

Iterative Development ◽

Measurement Results ◽

Simulation Results ◽

Turbine Design

Load calculations on wind turbines are an essential part of its development. In the preliminary design phase simplified multibody models are used for the estimation of the interface loads. The interface loads are used within an iterative development loop to design the components of the wind turbine such as gearbox, blades, tower and so on. Due to the early application of load calculations within the development process, the quality of the simulation results has a great influence on the wind turbine design. In this contribution the simulation results of the multibody codes alaska/Wind, MSC.Adams and SIMPACK are compared with measurements obtained from a prototype of a 2.05 MW wind turbine developed by W2e Wind to Energy. Furthermore, simulation results of the special wind turbine design code Flex5, developed at the Technical University of Denmark Copenhagen, are taken into account. A statistical and dynamical evaluation of the simulation and measurement results has been done. Due to the use of the same controller procedures as used on the physical wind turbine, the wind turbine models show almost the same behaviour (electrical power, pitch angle, rotor speed) as the wind turbine in the field. Differences occur during the evaluation of the interface loads due to the different kinds of wind turbine modelling.

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

ROTOR ◽

10.19184/rotor.v11i2.9338 ◽

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

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

Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) ◽

10.20961/prosidingsnfa.v3i0.28502 ◽

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

Abstract: 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.Abstrak: Lembaga Penerbangan dan Antariksa Nasional (LAPAN) per 18 Juli 2017 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.

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