Review on Savonius Rotor for Harnessing Wind Energy

2012 ◽  
Vol 36 (6) ◽  
pp. 605-645 ◽  
Author(s):  
K. Golecha ◽  
M. A. Kamoji ◽  
S. B. Kedare ◽  
S. V. Prabhu
Keyword(s):  
Power Generation ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Vertical Axis ◽  
Performance Characteristics ◽  
Savonius Rotor ◽  
Water Pumping ◽  
Bladed Rotor ◽  
Rotor Shape ◽  
Starting Torque

Wind machines convert kinetic energy of the wind into usable form of mechanical energy or electrical energy. The Savonius rotor is a vertical axis wind machine which is simple in design. High starting torque characteristics make it suitable for standalone power generation as well as water pumping applications. This paper reviews the literature on the performance characteristics of the Savonius rotor. Multi-bladed rotor, multistage rotor, shape of the blade, use of deflecting plate, guide vanes and nozzle augmentation are several ways to enhance the performance characteristics. This review would help an engineer in building an improved Savonius rotor for a given application.

Application of Savonius Rotor for Hydrokinetic Power Generation

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Oying Doso ◽  
Sarsing Gao
Keyword(s):  
Power Generation ◽  
Energy Demand ◽  
Energy Requirement ◽  
Electrical Energy ◽  
Vertical Axis ◽  
Electricity Production ◽  
Water Current ◽  
Technological Advancement ◽  
Power Sources ◽  
Savonius Rotor

Abstract Technological advancement is specifically identified by the usage of energy. The energy requirement is increasing because of the exponential population rise, increased industrial activities, and subsequent accelerated economic activities in both urban and suburban areas. The traditional power sources are becoming unsustainable as energy demand and induction of new sources for augmenting the energy need are lopsided. Additionally, traditional energy sources cause pollution, natural hazards, and more importantly, it is uneconomical. Due to these reasons, it becomes compelling to look for alternative sources of energy. Hydropower generation is reliable, non-polluting to a large extent, and a cheaper source of electrical energy. However, the conventional large hydropower projects, especially with reservoir components, are being opposed worldwide for social, environmental, economic, and safety reasons. Therefore, electricity production from free-flowing water may present a viable choice. Here, the free-flowing river water current is used to drive vertical-axis turbines preferably, Savonius rotors which are ideally built for wind energy conversion systems (WECS). The rotor is directly coupled to electric generators, and the scheme presents a typical variable voltage and variable frequency system similar to that of WECS except that the working force is due to water rather than wind. The use of the Savonius rotor for hydrokinetic power generation is uncommon; however, increased exploitation of this methodology may help in augmenting future energy need. This paper reviews the Savonius rotor and its possible application for hydrokinetic power generation; the merits and demerits of such schemes are clearly outlined.

Optimum Design of Cantilevered Piezoelectric Harvester Based on Distributed Parameter Model

2011 ◽  
Author(s):  
Saad F. Alazemi ◽  
Ahmet S. Yigit ◽  
Khaled A. Alhazza
Keyword(s):  
Power Generation ◽  
Mechanical Energy ◽  
Broad Band ◽  
Average Power ◽  
Electrical Energy ◽  
Distributed Parameter ◽  
Fe Model ◽  
Physical Constraints ◽  
Distributed Parameter Model ◽  
Design Variables

In the past decade, there have been numerous studies which showed the feasibility of harvesting electrical energy from vibrating structures. The main goal of this study is first to generate a Finite Element (FE) model using ANSYS to verify an existing harvesting model. This FEM model can be used as a base for designing more complex harvesters. The second goal of this study is to optimize the parameters of a simple cantilever harvester to maximize the power generation from ambient mechanical energy. A distributed parameter model and its modal solution are used to identify the design variables through a parametric study. The results obtained using the distributed parametric model is compared with the results obtained using ANSYS. It is of interest to ensure adequate power generation under non-resonant conditions for a broad band excitation. The average power within a certain frequency range is used as the cost function to define optimization problem along with some geometric and physical constraints. We found that, in certain frequency ranges, the parameters can be optimized to generate maximum power. Having validated the methodology, work is in progress to design and optimize harvesters with complex geometries.

Power Generation Performance of a Spherical Robot With Pendulums in Amphibious Environment

2021 ◽  
Author(s):  
Yansheng Li ◽  
Meimei Yang ◽  
Bo Wei ◽  
Yi Zhang
Keyword(s):  
Power Generation ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Spherical Robot ◽  
Experiment Platform ◽  
Voltage Balance ◽  
Physical Prototype ◽  
Physics Experiment ◽  
New Generation ◽  
Power Generation Performance

Abstract The energy of mobile robots severely limits their range of motion and work capabilities. This paper proposes a method of capturing energy from the amphibious environment for a spherical robot with pendulums. The movement of pendulums is analyzed during amphibious movement, and a feasible scheme is proposed for a pendulum to capture environmental energy and convert mechanical energy into electrical energy. The mathematical model of the swing power generation is established based on the pendulum dynamic equation and voltage balance equation. The physics experiment platform and virtual experimental platform are built to analyse the power generation performance. Furthermore, the power generation mathematical models are established respectively for the spherical robot rolling on the slope and floating in the water, and the power generation performance is analyzed and summarized under different conditions. The results show that the proposed power generation method and scheme can effectively supply the energy to the spherical robot, can enhance the endurance of the movement in the amphibious environment, and provide theoretical guidance for the development of the physical prototype of the new generation of amphibious spherical robot.

scholarly journals Development of Piezoelectric Energy Harvester System through Optimizing Multiple Structural Parameters

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2876
Author(s):  
Hailu Yang ◽  
Ya Wei ◽  
Weidong Zhang ◽  
Yibo Ai ◽  
Zhoujing Ye ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Energy Harvester ◽  
Structural Parameters ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Cross Sectional ◽  
Accelerated Pavement Testing ◽  
Piezoelectric Energy ◽  
Pavement Testing

Road power generation technology is of significance for constructing smart roads. With a high electromechanical conversion rate and high bearing capacity, the stack piezoelectric transducer is one of the most used structures in road energy harvesting to convert mechanical energy into electrical energy. To further improve the energy generation efficiency of this type of piezoelectric energy harvester (PEH), this study theoretically and experimentally investigated the influences of connection mode, number of stack layers, ratio of height to cross-sectional area and number of units on the power generation performance. Two types of PEHs were designed and verified using a laboratory accelerated pavement testing system. The findings of this study can guide the structural optimization of PEHs to meet different purposes of sensing or energy harvesting.

scholarly journals Development of Flapping Panel Vertical Axis Wind Turbine

2019 ◽  
Vol 9 (1) ◽  
pp. 2119-2122
Keyword(s):  
Power Generation ◽  
Wind Turbine ◽  
Power Output ◽  
Renewable Energy Sources ◽  
Electrical Energy ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Considerable Part ◽  
Ansys Fluent ◽  
Generation Capacity

In a developing nation like India, electricity has become one of the most important basic needs nowadays. Coal and gasoline based power generation capacity stands at 71% in India, which contributes to a considerable part of air pollution. There are various renewable energy sources which are pollution free, one among them is the wind energy. So the main objective of the project is to facilitate pollution free power generation for individual purpose. In order to understand the problem and working, a flapping panel vertical axis wind turbine was designed. The main advantage of using a vertical axis wind turbine is that it need not pointed towards the wind and also vertical axis wind turbine is more comfortable to erect for domestic purposes. The flapping panel wind turbine is designed using solidworks software and analysed using Ansys Fluent. By making use of the wind, the flapping panels attached to the shaft rotate and the rotor is connected to the permanent magnet electricity generator (PMG). The PMG converts the Kinetic energy of the rotor shaft into electrical energy. The PMG we have used has the capacity of producing maximum power at 1200rpm. On calculating theoretically, the power output is found to be 8W for the rotation of 76.39 rpm and for 1200rpm the power output is calculated to be 125W. The entire wind turbine setup is compact in size and can be easily mounted and erected.

scholarly journals Numerical Analysis of Signal Response Characteristic of Piezoelectric Energy Harvesters Embedded in Pavement

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2770
Author(s):  
Hailu Yang ◽  
Qian Zhao ◽  
Xueli Guo ◽  
Weidong Zhang ◽  
Pengfei Liu ◽  
...  
Keyword(s):  
Power Generation ◽  
Numerical Study ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Response Characteristic ◽  
Asphalt Pavements ◽  
Horizontal Distance ◽  
Concrete Pavements ◽  
Energy Harvesters ◽  
Piezoelectric Energy

Piezoelectric pavement energy harvesting is a technological approach to transform mechanical energy into electrical energy. When a piezoelectric energy harvester (PEH) is embedded in asphalt pavements or concrete pavements, it is subjected to traffic loads and generates electricity. The wander of the tire load and the positioning of the PEH affect the power generation; however, they were seldom comprehensively investigated until now. In this paper, a numerical study on the influence of embedding depth of the PEH and the horizontal distance between a tire load and the PEH on piezoelectric power generation is presented. The result shows that the relative position between the PEH and the load influences the voltage magnitude, and different modes of stress state change voltage polarity. Two mathematic correlations between the embedding depth, the horizontal distance, and the generated voltage were fitted based on the computational results. This study can be used to estimate the power generation efficiency, and thus offer basic information for further development to improve the practical design of PEHs in an asphalt pavement.

Drag and Lift Characteristics of a Novel Elliptical-Bladed Savonius Rotor With Vent Augmenters

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
Nur Alom ◽  
Ujjwal K. Saha
Keyword(s):  
Identical Condition ◽  
Three Dimensional ◽  
Vertical Axis ◽  
Rotor Blades ◽  
Vertical Axis Wind Turbine ◽  
Ansys Fluent ◽  
Savonius Rotor ◽  
Bladed Rotor ◽  
Drag And Lift ◽  
Lift And Drag

Savonius rotor, a class of drag-driven vertical axis wind turbine, has been extensively investigated mainly to calculate the torque and power coefficients (CT and CP) by various investigators. Hitherto, studies related to lift and drag characteristics are very few and have mainly been restricted to a semicircular-bladed rotor. A deeper investigation into the drag and lift coefficients (CD and CL) can result in the better design of rotor blades leading to an increment in CT and CP. In view of this, in the present investigation, CD and CL of an elliptical-bladed rotor with vent augmenters have been studied numerically. Initially, two-dimensional (2D) unsteady simulations using an ansys fluent solver is carried out to estimate the instantaneous CD and CL. The shear stress transport (SST) k–ω turbulence model is selected to solve the Reynolds averaged Navier Stokes (RANS) equations. Finally, three-dimensional (3D) unsteady simulations are carried out for the vented elliptical-bladed rotor. The unsteady simulations are performed for the nonvented elliptical- and semicircular-bladed rotors at the identical condition in order to have a direct comparison. From the unsteady simulations, the average CD for the vented elliptical profile is found to be 1.45; whereas, the average CD for the nonvented elliptical and semicircular profiles is found to be 1.43 and 1.35, respectively.

A Review of Two Patents Relating to Novel Energy Harvesting Techniques to Provide Electrical Power On-Board Gun-Fired Projectiles

2010 ◽  
Author(s):  
Jahangir Rastegar ◽  
Richard Murray
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Mechanical Energy ◽  
Electrical Power ◽  
Electrical Energy ◽  
Harsh Environment ◽  
Logical Framework ◽  
Power Sources ◽  
Piezoelectric Elements ◽  
Harvesting Techniques

This is a review of two patents relating to electrical power generation on-board gun-fired munitions. The devices harvest mechanical energy from the motion of the projectile (e.g. the axial firing acceleration), and then convert the energy from mechanical to electrical using novel mechanisms and materials such as piezoelectric elements. The devices are particularly important for several reasons. Firstly, the devices are inherently safe because the root source of the electrical energy is the motion of the projectile; therefore no electrical energy can be produced until after the projectile is fired. Second, the devices have a much longer shelf-life than competing electrical power sources such as batteries. Finally, the devices are simple, rugged, and reliable making them ideal for the harsh environment on-board gun-fired projectiles. In addition to presenting the general approach, the logical framework of the patented embodiments is presented, especially with respect to the types of motion used for harvesting and the challenges presented by the varied magnitudes of those motions in different weapon platforms.

Design of Fitness Device with Power Generation and Multi-Function

2014 ◽  
Vol 624 ◽  
pp. 377-380
Author(s):  
Hai Fei Qiu ◽  
Jin Wei He ◽  
Long Gu
Keyword(s):  
Power Generation ◽  
Daily Life ◽  
Group Structure ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Test Results ◽  
Available Energy ◽  
Physical Prototype ◽  
Safe Load ◽  
Actual Test

In this paper, a fitness device which could generate electricity was designed into rod group structure based on theoretical calculation and experiment. The device could make mechanical energy into electrical energy in process of fitness, and the storage power could used to daily life lighting and small household electrical appliances power. Physical prototype of the device was developed successfully, the actual test results show that, the safe load of the device was 100kg, the charging voltage was 5V and 12V. People could generated available energy in process of fitness, positivity of fitness for people were removed, in results, the device contained certain practical value of popularization.

scholarly journals Footstep Power Generation Using Piezoelectric Material

2021 ◽  
Vol 9 (VII) ◽  
pp. 3623-3626
Author(s):  
Gaurav Thapliyal
Keyword(s):  
Power Generation ◽  
Mechanical Energy ◽  
Cost Effective ◽  
Electrical Energy ◽  
Energy System ◽  
Energy Resources ◽  
Piezoelectric Sensors ◽  
Shopping Malls ◽  
Railway Stations ◽  
Generation Technique

In the day-to-day life, the utilization of power turns of being necessary for each work. This paper focuses on designing a setup that leads to the generation of electrical energy which is going to waste when humans are walking. There are different methods used to produce energy like conventional and non-conventional methods. In this project, we are doing generation of power by walking or running. Power can be generated by walking on the stairs. The generated power will be stored and then we can use it for domestic purposes. The paper proposes a novel technique for the creation of power utilizing piezoelectric sensors kept along the footpaths which can be ready to charge the battery and ready to supply the force at whatever time of our prerequisite. The non-conventional energy system is very essential currently to our nation. Nonconventional energy using footstep is converting mechanical energy into Electrical Energy. Due to this a lot of energy resources have been exhausted and wasted. This system can be installed at homes, schools, colleges, where people move around the clock. The footstep power generation technique through piezoelectric sensors produces electrical force by changing piezoelectric force generation framework is that is sheltered and secure to utilize it does not make any issue or distress for the general population strolling through the footpath, and it is a free strategy. This project will be cost-effective and easy to be installed in populated areas like railway stations, bus stands, and shopping malls. Our project is cost-effective and easy to implement.

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