scholarly journals Determining Optimum Rotary Blade Design for Wind-Powered Water-Pumping Systems for Local Selected Sites

2021 ◽  
Vol 67 (5) ◽  
pp. 214-222
Author(s):  
Abdulbasit Mohammed ◽  
Hirpa G. Lemu ◽  
Belete Sirahbizu
Keyword(s):  
Wind Energy ◽  
Performance Optimization ◽  
Rotor Blade ◽  
Rotor Blades ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Blade Design ◽  
Pumping System ◽  
Water Pumping ◽  
And Performance

The design of a windmill rotor is critical for harnessing wind energy. In this work, a study is conducted to optimize the design and performance of a rotor blade that is suitable for low wind conditions. The windmills’ rotor blades are aerodynamically designed based on the SG6043 airfoil and wind speed data at local selected sites. The aerodynamic profile of the rotor blade that can provide a maximum power coefficient, which is the relation between real rotor performance and the available wind energy on a given reference area, was calculated. Different parameters, such as blade shapes, chord distributions, tip speed ratio, geometries set angles, etc., were used to optimize the blade design with the objective of extracting maximum wind power for a water pumping system. Windmill rotor of 10.74 m, 7.34 m, and 6.34 m diameter with three blades were obtained for the selected sites at Abomsa, Metehara, and Ziway in south-east Ethiopia. During the rotary blades performance optimization, blade element momentum (BEM) theory and solving iteration by MATLAB® coding were used.

scholarly journals Determining Optimum Rotary Blade Design for Wind-Powered Water-Pumping Systems for Local Selected Sites

2021 ◽  
Vol 67 (5) ◽  
pp. 214-222
Author(s):  
Abdulbasit Mohammed ◽  
Hirpa G. Lemu ◽  
Belete Sirahbizu
Keyword(s):  
Wind Energy ◽  
Performance Optimization ◽  
Rotor Blade ◽  
Rotor Blades ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Blade Design ◽  
Pumping System ◽  
Water Pumping ◽  
And Performance

The design of a windmill rotor is critical for harnessing wind energy. In this work, a study is conducted to optimize the design and performance of a rotor blade that is suitable for low wind conditions. The windmills’ rotor blades are aerodynamically designed based on the SG6043 airfoil and wind speed data at local selected sites. The aerodynamic profile of the rotor blade that can provide a maximum power coefficient, which is the relation between real rotor performance and the available wind energy on a given reference area, was calculated. Different parameters, such as blade shapes, chord distributions, tip speed ratio, geometries set angles, etc., were used to optimize the blade design with the objective of extracting maximum wind power for a water pumping system. Windmill rotor of 10.74 m, 7.34 m, and 6.34 m diameter with three blades were obtained for the selected sites at Abomsa, Metehara, and Ziway in south-east Ethiopia. During the rotary blades performance optimization, blade element momentum (BEM) theory and solving iteration by MATLAB® coding were used.

Performance of a HAWT Rotor with a Modified Blade Configuration

2021 ◽  
Vol 30 (1) ◽  
pp. 201-220
Author(s):  
Tabrej Khan ◽  
Balbir Singh ◽  
Mohamed Thariq Hameed Sultan ◽  
Kamarul Arifin Ahmad
Keyword(s):  
Wind Energy ◽  
Wind Turbines ◽  
Open Loop ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Second Phase ◽  
Blade Design ◽  
Horizontal Axis Wind Turbine ◽  
Wind Speeds ◽  
And Performance

As the world focuses more on clean and green Earth, wind energy plays a significant role. Wind energy is a renewable source of energy that can cope with the ongoing global fossil fuel crisis. The wind energy converters like wind turbines have been studied a lot in terms of design and performance. The current work includes analyzing the output effects of a horizontal axis wind turbine (HAWT) with a modified blade configuration at specific wind speeds. A numerical investigation is carried out using two different numerical software on the chosen airfoil used in blade design validated with the analysis carried out in open-loop wind tunnels. The study is divided into two phases: first, the selected airfoil is tested experimentally and using CFD, and then the findings are compared to those of the University of Illinois Urbana Champaign wind tunnel tests at low Reynolds numbers. The second phase includes the numerical analysis based on the blade element momentum method and non-linear lifting line simulations of modified blade design at high Reynolds number. The numerical results of rotor performance analysis have been compared to existing experimental results. The findings of all numerical investigations agree with those of the experiments. An optimal value of the power coefficient is obtained at a particular tip speed ratio close to the desired value for large wind turbines. For maximum power, this study investigates the optimum pitch angle. The work demonstrated the improved HAWT rotor blade design to produce better aerodynamic lift and thus improve performance.

Development of a Scaled Rotor Blade for Tank Tests of Floating Wind Turbine Systems

2018 ◽  
Author(s):  
Paul Schünemann ◽  
Timo Zwisele ◽  
Frank Adam ◽  
Uwe Ritschel
Keyword(s):  
Wind Turbine ◽  
Rotor Blade ◽  
Turbine Rotor ◽  
Full Scale ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Model Scale ◽  
Floating Wind Turbine ◽  
Hydrodynamic Effects ◽  
Wind Turbine Rotor

Floating wind turbine systems will play an important role for a sustainable energy supply in the future. The dynamic behavior of such systems is governed by strong couplings of aerodynamic, structural mechanic and hydrodynamic effects. To examine these effects scaled tank tests are an inevitable part of the design process of floating wind turbine systems. Normally Froude scaling is used in tank tests. However, using Froude scaling also for the wind turbine rotor will lead to wrong aerodynamic loads compared to the full-scale turbine. Therefore the paper provides a detailed description of designing a modified scaled rotor blade mitigating this problem. Thereby a focus is set on preserving the tip speed ratio of the full scale turbine, keeping the thrust force behavior of the full scale rotor also in model scale and additionally maintaining the power coefficient between full scale and model scale. This is achieved by completely redesigning the original blade using a different airfoil. All steps of this redesign process are explained using the example of the generic DOWEC 6MW wind turbine. Calculations of aerodynamic coefficients are done with the software tools XFoil and AirfoilPrep and the resulting thrust and power coefficients are obtained by running several simulations with the software AeroDyn.

Optimization of Aerodynamic Parameters of an Elliptical-Bladed Savonius Wind Rotor Using Multi-Objective Genetic Algorithms

2019 ◽  
Author(s):  
Nur Alom ◽  
Ranjan Das ◽  
Ujjwal K. Saha
Keyword(s):  
Genetic Algorithms ◽  
Lift Coefficient ◽  
Optimization Technique ◽  
Geometric Parameters ◽  
Rotor Blades ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Direct Optimization ◽  
Multi Objective ◽  
Augmentation Techniques

Abstract The Savonius wind rotor, a drag-based machine, despite having lesser efficiency has got several advantages such as low price, easy installation, better starting capability independency to wind direction. In order to enhance the performance of such rotor, several design modifications have been built by changing the geometric parameters such as overlap ratio, aspect ratio, tip speed ratio, number of rotor blades and effect of shaft and end plates. Apart from the various geometric parameters, several rotor blades and augmentation techniques has evolved to improve the performance of the Savonius rotor. This has been achieved by using a host of numerical and experimental methods. In the present investigation, the multi-objective genetic algorithms have been used to optimize the incoming velocity, and the torque and lift coefficient for a novel elliptical-bladed profile for maximizing the rotor power coefficient. The multi-physics solver ANSYS direct optimization technique has been used to implement the genetic algorithms. The results obtained from the genetic algorithms have been compared with the established results under identical conditions.

A Study on Water Pumping by Using a Small Multi-Blades Windmill for Used in a Remote Area

2013 ◽  
Vol 724-725 ◽  
pp. 527-530
Author(s):  
Yuttachai Keawsuntia
Keyword(s):  
Wind Velocity ◽  
Life Time ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Pump System ◽  
Tip Speed Ratio ◽  
Water Pumping ◽  
Overall Efficiency ◽  
Water Base ◽  
Rotor Model

The objective of this research is to study the small multi-blades windmill for water pumping by using a studying performance of windmill which has a curvature plate ratio of 0.07 and determine overall efficiency and evaluate economic of the system. The results from the test run of windmill rotor model in the wind tunnel at a wind velocity of 3 m/s, the windmill give maximum power coefficient of 0.296 at a tip speed ratio of 1.18. The results from the test run of the windmill-pump system at 2 m head have an overall efficiency of 0.239 at the wind velocity of 1.2 m/s. The output of 2.38 L/min, which implies a rate of return for water pumping at 0.038 USD per cubicmetre of water base on 10 year-life time of windmill.

scholarly journals Design and Analysis of the Multi Blade Angle Centrifugal Pump Impeller by Using CFX Tool

2021 ◽  
Vol 9 (VII) ◽  
pp. 2350-2356
Author(s):  
M.U. Ravindranath
Keyword(s):  
Centrifugal Pump ◽  
Flow Analysis ◽  
Internal Flows ◽  
Pump Impeller ◽  
Pumping System ◽  
Pressure Distributions ◽  
Water Pumping ◽  
Performance Point ◽  
Fluent Software ◽  
And Performance

This project investigates the study of complex internal flows in centrifugal pump impellers with the aid of Computational Fluid Dynamics software thus facilitating the design of pumps. Here three different types of Pump impellers had been taken, the pump specifications considered for investigation are discharge and speed. A design of centrifugal pump is carried out and analyzed to get the best performance point. The design and performance analysis of centrifugal pump are chosen because it is the most useful mechanical rotodynamic machine in fluid works which widely used in domestic, irrigation, industry, large plants and river water pumping system. These specifications have been varied toper form a comparative study of these pump impellers. The impeller was modeled and the blade to blade plane of the impellers was taken for the detailed study purpose because the flow occurs through this passage only. The blade-to-blade plane is modeled and the flow analysis is carried out using FLUENT software. Thus the valid results regarding the velocity distribution and pressure distributions were predicted for different blade angles.

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