Andrew Defanto

Resume About Design and Analysis of Archimedes Aero-Foil Wind Turbine Blade For Light and Moderate Wind Speed

Wind is an abundant resource and its utilization cannot be affected by climate and weather. Futhermore, it is a resource of the renewable power. The device (wind turbine) are act as the converter from wind kinetic energy into power which can provide electricity for the home, etc. and also large scales. The device itself consist of several parts such as the rotor, generator, control system, and so on. The rotor itself driven by the wind and predefined speeds in term of the wind speed. The orientation of the shaft and rotational axis which are mounted to the turbine define the type of the turbine.

In early ages, shape of the aeroplane wings were used for the model of the turbine blades. Selection of aerofil shape is the most crucial as it is the important variable to deteremine the maximum conversion of the kinetic energy into rotational energy. The journal focused on the Archimedes wind turbine new design. Futhermore, the design are consisting of three circular blade, wrapped around one another which act as coils and then expanded creating a three-dimensional conical turbine. Thus, this design both use the lift and drag force and also guaranteed that wind is drawn into the turbine with an effective angle of 90 degrees by the coils. The image below shows a diagram of Archimedes wind turbine having three blades connected to each other at 120 degrees and symmetric arrangement to the shaft

The outer diameter of the Archimedes Spiral wind turbine is 1500 mm, the thickness is 5mm and the length is 1500mm. The design fuction are using the selction of aerofil and the shape aerodynamics are selected for the blade performance. The choice is based on the compairing lift and drag over different aerofils. The dimensions are scaled from the NACA 6409 aerofil shape and scaled to AAWT dimension by using MATLAB. The final design is rather complex.

The analysis of the result is using some methodology such as computational method, mesh generation and boundry setup. From the analysis, we can conclude that using aerofil to and Archimedes wind turbine can increase the torque at a lower speed nearly 15% that AWT, it also shows that the Archimedes wind turbine can extract more power in low and moderate- wind speed than other wind turbine. Futhermore, the design requires less cost which is caused by none of electronic yawning needed because the usage of drag and lift force and also the Archimedes aerofil wind turbine mlooks getting more promising power thand other wind turbine.

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Personal Journal on Designing and Design Preference of Archimedes Airfoil Wind Turbine Blades

Abstract

Wind turbine are one of many technologies which supports the renewable energy. The wind turbine itself are applicated as electricity generator from large grid-connected production. With the increased power grid and reduced of electricity scarce area, smaller wind turbines are being produced. Futhermore, it applied in many fields for instance on city road lighting, mobile communication base station, offshore aquaculture and more. Some studies show, energy generation in urban area are being performed in the United Kingdom. Some of the urban energy generators are using small scaled wind turbine. There are two types of wind turbine one of it is horizontal axis wind turbine. The Archimedes wind turbine itself are adopting the horizontal axis wind turbine as the axis preference. The design formula of the blades itself are came from the law of the angular momentum conservation law and derived using a variety of shaped factors. Futhermore, the aerodynamics and performance characteristic of the blades are examined using the computational fluid dynamics (CFD) simulation. In general, from literature it says that the Archimedes Wind Turbine produce the power coefficient (Cp) of approximately 0.25, which are higher than other types of urban wind turbine. In order to find the trend and maximal efficiency and output, our research team are using the variables of the blade revolution and the number of blades as the first analysis. Then we we combined it with various types of airfoil, and founded the trend of the variable itself. Futhermore, we calculate the variables manually with some formula inorder to compare the value and combine it with the calculation analysis from the CFD simulation in order to find the best power output and efficiency it can produced.

Keywords: Archimedes Wind Turbine, efficiency, CFD simulation, blades variable, airfoil, manual calculation, simulation analysis calculation.

Introduction

Archimedes screw are one of the oldest machines being use, a device which used to lifting water for irrigation and drainage purposed. The device however, very helpful for people in that era to take water form downhill and transfer it to uphill in ease. Futhermore, the instrument keep being used in Roman civilitation as Vitruvius gave the detail of Archimedes Screw itself on his book De Architectura on the first century B.C. The design itself begins with a tree trunk shaped into a cyclindrical core whose length is 16 times its diameter. Nowdays, the design of Archimedes pump is taken for other purposes, such as turbine. In this semester on the design assigntment class, writer and his team are assigned to create the turbine based by the Archimedes screw design. Writer and his team are aiming for the maximum output of energy and the best efficiency from the turbine. Futhermore, design itself are being implemented as the turbine blades design.Thus, we are using airfoil as the profile design. Based on the article Design and Analysis of Archimedes Aero-Foil Wind Turbine Blade for Light and Moderate Wind Speeds, “In the early stage, the aerofoil shapes of aeroplane wings were used for wind turbine blade design. Selection of aerofoil shape is the most crucial of the wind turbine design as ultimate responsibility for the maximum conversion of kinetic energy into rotational energy” means that the blades design itself are crucial to gain the maximum output and the best efficiency from the turbine. In addition, writers and his teams are searching the optimal blades design which are based on the literature reading and interview. Writer and his team are designing the turbine and turbine system using hand drawing and also the CAD software which is Solidworks. While designing the turbine, writer and his team are encounter several problems which is including technical failure and human error. Futerhmore, in order to solve the problem, writer and his team are watching some youtube tutorials and interviewing some source.