Improved design of Savonius rotor for green energy production from moving Singapore metropolitan rapid transit train inside tunnel

2018 ◽  
Vol 233 (7) ◽  
pp. 2426-2441 ◽  
Author(s):  
Praveen Laws ◽  
Rajagopal V Bethi ◽  
Pankaj Kumar ◽  
Santanu Mitra
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Degrees Of Freedom ◽  
Fossil Fuels ◽  
Numerical Study ◽  
Electrical Energy ◽  
Daily Basis ◽  
Green Energy ◽  
Subway Tunnel ◽  
Savonius Wind Turbine

Nonrenewable fossil fuels are finite resources that will ultimately deplete in near future. Nature sheds colossal amount of renewable wind energy but humans harvest a morsel. Taking this into account a numerical study is proposed on wind energy harvesting from a speeding subway train. Subways trains generate a remarkable gust of wind that can be transferred to useful electrical energy on daily basis. To this aim, a numerical analysis is modeled by placing Savonius wind turbine in a subway tunnel to crop the wind energy produced from the speeding train. The passage of train in the tunnel generates very high velocity slipstreams along the length of the tunnel. The slipstream phenomena develop a boundary layer regime that will be absorbed by the Savonius wind turbine to self-start and generate power. In the present study, a two-dimensional numerical simulation with modified turbine blade design is carried out using open source tool OpenFOAM® with PimpleDyMFoam solver coupled with six degrees of freedom mesh motion solver sixDoFRigidBodyMotion and k–ɛ turbulence modeling, to measure the amount of torque predicted by the rotor from the gust of wind produced by the speeding train in the tunnel. Being a self-start turbine with no yaw mechanism required the turbine collects air from any direction and converts it into useful power.

Effect of Slotted Angle on Savonius Wind Turbine Performance

2021 ◽  
Vol 104 ◽  
pp. 83-88
Author(s):  
Rahmat Wahyudi ◽  
Diniar Mungil Kurniawati ◽  
Alfian Djafar
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Electrical Energy ◽  
Speed Ratio ◽  
Angle Variation ◽  
Wind Speeds ◽  
Turbine Performance ◽  
Savonius Wind Turbine ◽  
Low Wind Speeds

The potential of wind energy is very abundant but its utilization is still low. The effort to utilize wind energy is to utilize wind energy into electrical energy using wind turbines. Savonius wind turbines have a very simple shape and construction, are inexpensive, and can be used at low wind speeds. This research aims to determine the effect of the slot angle on the slotted blades configuration on the performance produced by Savonius wind turbines. Slot angle variations used are 5o ,10o , and 15o with slotted blades 30% at wind speeds of 2,23 m/s to 4,7 m/s using wind tunnel. The result showed that a small slot angle variation of 5o produced better wind turbine performance compared to a standard blade at low wind speeds and a low tip speed ratio.

A Numerical Study Toward Harvesting Power From Train Slipstream Using Savonius Rotor

2020 ◽  
Vol 142 (5) ◽  
Author(s):  
Praveen Laws ◽  
Ajit Kumar ◽  
Santanu Mitra
Keyword(s):  
Wind Turbine ◽  
Energy Production ◽  
Numerical Study ◽  
Production Method ◽  
Green Energy ◽  
Present Knowledge ◽  
Parametric Sensitivity ◽  
Turbine Performance ◽  
Moving Vehicles ◽  
Savonius Wind Turbine

Abstract A novel and strategic green energy production method that utilizes relative wind generated from moving vehicles is presented. A speeding train generates an enormous wake of wind around it, which stocks a substantial amount of kinetic energy. In this study, this freely accessible wind power is harvested by installing a modified savonius wind turbine within the slipstream region of the train. A computer-oriented fluid-solid integrate simulation of wind turbine propelled by train-induced wind is performed by executing all physically realistic boundary conditions. The numerical study is based on open-source CFD toolbox openfoam, and the results were validated against benchmark experimental study. Parametric sensitivity analysis such as optimal turbine performance within the slipstream regime, torque prediction from express trains, two opposite crossing trains, tunnel condition, and turbine wind turbine clusters arrangement has been reported. This study enhances the understanding of the power generation by the turbine from the train slipstream which is not reported in any open literature as far as the authors’ present knowledge goes.

scholarly journals A numerical study of the effect of a single cylinder and plate deflector toward the Savonius wind turbine performance

2020 ◽  
Vol 1477 ◽  
pp. 052010
Author(s):  
A Subekti ◽  
PA Setiawan ◽  
Bachtiar ◽  
N Ariwiyono ◽  
B Prasojo ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Numerical Study ◽  
Single Cylinder ◽  
Turbine Performance ◽  
Savonius Wind Turbine

Use of the Savonius Wind Turbine for the Needs of Public Lighting

2014 ◽  
Vol 1008-1009 ◽  
pp. 179-182
Author(s):  
Iveta Gressová
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Wind Energy ◽  
Wind Turbine ◽  
Energy Use ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Geothermal Heat ◽  
Current Generation ◽  
Savonius Wind Turbine

Our planet gives us many mineral sources, but they have a big disadvantage. They are finite. Non-renewable energy sources are enough only for decades, exceptionally for centuries. Current generation is aware of the importance of using other energy sources, such as sunlight, wind, rain, tides, waves and geothermal heat. These energy sources are renewable. It means that they come from sources, which are naturally replenished on a human timescale. One of these sources is wind energy. Use of this kind of energy source needs an initial investment, but it can reduce cost of running a household and other sectors. This article is about Savonius wind turbine and its use for the needs of public lighting.

Computational Investigation of a Shrouded Vertical Axis Wind Turbine

2016 ◽  
Author(s):  
K. Vafiadis ◽  
H. Fintikakis ◽  
I. Zaproudis ◽  
A. Tourlidakis
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Urban Areas ◽  
Numerical Study ◽  
Flow Analysis ◽  
Vertical Axis ◽  
Green Energy ◽  
Vertical Axis Wind Turbine ◽  
Wide Range ◽  
Small Wind Turbines

In urban areas, it is preferable to use small wind turbines which may be integrated to a building in order to supply the local grid with green energy. The main drawback of using wind turbines in urban areas is that the air flow is affected by the existence of nearby buildings, which in conjunction with the variation of wind speed, wind direction and turbulence may adversely affect wind energy extraction. Moreover, the efficiency of a wind turbine is limited by the Betz limit. One of the methods developed to increase the efficiency of small wind turbines and to overcome the Betz limit is the introduction of a converging – diverging shroud around the turbine. Several researchers have studied the effect of shrouds on Horizontal Axis Wind Turbines, but relatively little research has been carried out on shroud augmented Vertical Axis Wind Turbines. This paper presents the numerical study of a shrouded Vertical Axis Wind Turbine. A wide range of test cases, were examined in order to predict the flow characteristics around the rotor, through the shroud and through the rotor – shroud arrangement using 3D Computational Fluid Dynamics simulations. The power output of the shrouded rotor has been improved by a factor greater than 2.0. The detailed flow analysis results showed that there is a significant improvement in the performance of the wind turbine.

scholarly journals ANALISIS KELAYAKAN TURBIN ANGIN KECEPATAN RENDAH TIPE NT1000W DI WILAYAH TERPENCIL

2019 ◽  
Vol 10 (1) ◽  
pp. 84-93
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Renewable Energy ◽  
Wind Speed ◽  
Wind Energy ◽  
Wind Turbine ◽  
Electrical Energy ◽  
Remote Communities ◽  
Low Speed ◽  
Energy Needs ◽  
One Step ◽  
Research Studies

This research discusses the fulfillment of the electricity needs of remote communities that are closely related to electrification ratios. Electrification ratios in some isolated areas and scattered islands in Indonesia are still very low. To date, most of the electricity needs in Indonesia is still supplied by Diesel Power Electricity Generator (PLTD) which uses diesel as its fuel. Therefore, it is necessary the utilization of renewable energy as one step to fulfill the electrical energy needs. This research studies about the utilization of wind energy with PLTB by using low speed wind turbine to fulfill the electricity needs of remote communities and scattered islands in Indonesia. NT1000W is the latest technology of low speed wind turbine that can operate at wind speed of 1 m/d up to 60 m/d appropriate to the wind conditions in Indonesia. Testing conducted in west Sumatera particularly in Padang city and Kapo-Kapo Island provide a feasibility of PLTB NT1000W technically and financially.

scholarly journals A Review on Wind Turbine and Wind Generator Used in WECS

2019 ◽  
pp. 01-04
Author(s):  
Nitish Kumar Singh ◽  
Dashrath Kumar
Keyword(s):  
Energy Source ◽  
Wind Energy ◽  
Wind Turbine ◽  
Power Quality ◽  
Power Plants ◽  
Harmonic Distortion ◽  
Energy Resource ◽  
Electrical Energy ◽  
Wind Power Plants ◽  
Core Energy

The applications of wind energy develop much rapidly than the other renewable resources such as solar, geothermal and so on in the 21st century. It becomes the third core energy resource following non-conventional fuels as oil and chemical. Electrical energy generated by wind power plants is the best ever developing and most promising renewable energy source. The wind is a clean, free and limitless energy source. Wind Energy Generation Systems (WECS) are confront with increasing demands for power quality and harmonic distortion control. With the advance in power electronics technology, the fast growth of variable speed WECS is now witness. However, the power quality still remains an important issue to be addressed thoroughly by researchers. This paper presents a comparative study on grid connected WECS having two different Wind Turbine Generator Systems (WTGS) using DFIG and PMSG.

scholarly journals Perancangan dan Perhitungan Sudu Turbin Angin Horisontal NACA 4412 Variasi Sudut Serang Menggunakan Simulasi BEM

2020 ◽  
Vol 8 (2) ◽  
pp. 34-37
Author(s):  
Gian Roni Ignatius ◽  
Agus Sugiri ◽  
Ahmad Suudi
Keyword(s):  
Wind Energy ◽  
Wind Turbines ◽  
Fossil Fuels ◽  
Mechanical Energy ◽  
Angle Of Attack ◽  
Electrical Energy ◽  
Shaft Speed ◽  
A Value ◽  
Mechanical Rotation ◽  
Main Material

The need for electricity in Indonesia becoming increasingly part of people's needs. Fossil fuels suchas oil and coal used as the main material for producing electrical energy the more limitedavailability, especially in its use of fossil fuels that pollute the environment. Wind energy is arenewable energy source that could potentially be developed. Wind energy is clean and does notpollute the environment in utilization into mechanical or electrical energy. The conversion of windenergy into electrical energy by converting this energy into mechanical rotation. In the wind energyutilization process made a tool to convert wind energy into electrical energy, that is windturbines.Wind turbine or windmill is a tool for converting wind energy. Wind turbines transformkinetic energy into mechanical energy in the form of a round shaft. Shaft speed is then used to rotatethe dynamo or a generator which produces electricity. The research was carried out on a horizontalaxis wind turbine NACA 4412, diameter 1 m, the number of blades 3 pieces and variations in windspeed 2-8 m / s. Results showed the greatest lift (CL) at 14o angle of attack with a value of 1.583.The driving force of the smallest (CD) at an angle of attack -4o to 2o with a value of 0.008. Value CL/ CD was found in the angle of attack of 6o with a value of 93.057. The maximum power generatedby 484.63 Watt. Wind speed, the number of blades, angle of attack and the election of the airfoileffect on the generated power.Keywords : wind energy, wind turbines, airfoil NACA 4412.

scholarly journals A NUMERICAL STUDY OF THE TURBULENCE MODEL INFLUENCE ON A SAVONIUS WIND TURBINE PERFORMANCE BY MEANS OF MOVING MESH

2019 ◽  
Vol 42 (3) ◽  
pp. 91-93 ◽  
Author(s):  
Nopem Ariwiyono ◽  
Priyo A. Setiawan ◽  
Adi W. Husodo ◽  
Sudiyono . ◽  
Arief Subekti ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbulence Model ◽  
Numerical Study ◽  
Moving Mesh ◽  
Turbine Performance ◽  
Savonius Wind Turbine

scholarly journals Analisa Aliran Angin Pada Sudu Turbin Angin Savonius Tipe-U Berbasis Software

2018 ◽  
Vol 4 (2) ◽  
pp. 93
Author(s):  
Delffika - Canra ◽  
Meri Rahmi ◽  
Emin Haris
Keyword(s):  
Renewable Energy ◽  
Aspect Ratio ◽  
Wind Energy ◽  
Wind Turbine ◽  
Electrical Energy ◽  
Simulation Method ◽  
Renewable Energy Resources ◽  
Wind Speeds ◽  
Low Wind Speeds ◽  
Turbine Construction

Generally, wind energy sources in Indonesia's coastal areas is one of the potential sources of renewable energy (renewable energy resources) which are abundant, environmentally friendly and renewable. Savonius wind turbines can produce relatively high torque even at low wind speeds. Because it is very well developed to produce electrical energy. To get a large electric power, a large turbine construction is also needed which also certainly requires a large cost. For this reason, it is necessary to develop the dimensions of this wind turbine construction which is known as aspect ratio (Ar). The Ar that has been researched is the blade section, and other values. While the arch depth or the length of the blade arc in U -type is still likely to be researched. Therefore, it is necessary to do research on the U-type blade arc to get greater power than before. In addition to the experimental method with a prototype of the U type Savonius wind turbine with a number of 2 blades, a software-based simulation method will be carried out to analyze the air flow on the wind turbine blade. Parameters varied only with the aspect ratio of the arc length and blade cross section width, other parameters follow the previous research. This analysis will be a comparative data with experimental methods. The expected simulation results obtain the best aspect ratio (Ar) blade in capturing wind energy.

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