No core disc vertical axis wind turbines
001 使用ANSYS Fluent的Savonius涡轮机CFD分析
创新Sijal Ahmed Memon的三维URNS CFD分析使用ANSYS Fluent的Savonius涡轮机（VAWT）IntroductionMeshingSolution and Post Processing•风力涡轮机是将空气的动能转换为机械轴能，然后再转换为电能的装置。
•在本课程/研讨会中，您将了解叶轮机CFD 分析以及结果与可用数据的比较。
•叶轮机是创新型Savonius 垂直轴风力涡轮机（VAWT ）•我们将解决3D 瞬态情况，您将了解如何解决和后期处理3D 瞬态风机CFD 分析。
•在这种情况下，我们将采用非定常方法，即URNS （非定常雷诺平均纳维-斯托克斯方程）。
维URNS CFD 分析IntroductionMeshingSolution and Post Processing•Tulip turbines are innovative design of vertical axis wind turbines. •More efficient, produce less noise, takes less space and is safer for birds. •Since it is omni directional, therefore it can harness power from any direction.•Installed on rooftop along with solar system. It compliments solar as wind turbines produce more energy during night and winter months.行三维URNS CFD 分析Problem DescriptionThe data of this wind turbine is given below:•There are two blades of leaf shape.•TSR varies from 0.2-1.2•Maximum diameter is 0.46 m and blade height is 0.9144 m •We will solve at TSR = 0.6 using URANS for 3D case•Meshing will be done in ICEMCFD and geometry cleaning and domain creation is done in spaceclaim•Solution will be carried out in Fluent and post process in CFD-Post.Problem description Geometry and domain MeshingSolution and Post ProcessingD = 0.3556 mDmax = 0.46 mD = 0.1016 mRωV in = 5 m/secwindleaf-2blade-settingb2_asm.IGS使用ANSYS Fluent Sijal Ahmed Memon 对创新Savonius 涡轮机（VAWT ）进行三维URNS CFD 分析Finding out equivalent/average diameterProblem description Geometry and domain MeshingSolution and Post ProcessingCFD analysis of Darrieus VAWT Using ANSYS Fluent Sijal Ahmed Memon•For Savonius wind turbine, area is given by (facing wind):•But the problem is that diameter is varying along the height. So, we have two sections, and we will find out equivalent diameter by simple average .Diameter ×HeigℎtSection 10.3556 m Section 20.39852 m Section 30.43177 m Section 40.45233 m Section 50.45931 m Section 60.445.08 m Section 70.40793 m Section 80.34748 m Section 90.28598 m Section 100.21816 m Section 110.1661 m Section 120.1016 mAverage Dia 0.3295Swept area =H ×D A =0.9144×0.3295A =0.3012948m 2DiameterHeight = 0.9144 mTurbine PerformanceMeshingSolution and Post ProcessingSijal Ahmed MemonSome important formulasMeshingSolution and Post ProcessingSijal Ahmed MemonTip Speed ratio TSR =ω∙RV in ω=rotational speed of turbine rad/sR =Raduis of turbine =D2V in =Velocity of incoming air to turbineCoefficienit of performance C p =P actualP air P air=12ρAV 3P actual =T ∙ωT =Torque of turbineWhere,Where,Note:1. TSR varies from 0 to 1.2 for Savonius turbine.2. Relatively Cp is very low for Savonius turbine, specially for unoptimized designs. Their low Cp values are justified with inexpensive and simplified manufacturing process.Betz Limit:C p,max=1627=59.3%Some important formulasMeshingSolution and Post ProcessingSijal Ahmed MemonConversion between rad/s and rpmω1revolution =2πRadians =360deg 1revolution minute =2πRadians 60seconds 1rpm =2π60ൗrads Example 1: convert 60 rpm into rad/s. 60rpm =60×2π60ൗrads =2πൗrad s Example 2: Convert 30 rad/s into rpm. 60rpm =6.28ൗrad s1ൗrad s =602πrpm 30ൗrad s =30×602πrpm =286.6rpmBoundary conditions and material propertiesMeshingSolution and Post ProcessingSijal Ahmed MemonV in =5Τm sTurbine Radius R =D 2in =0.32952=0.16475mA =0.3012948m 2TSR =0.6TSR =ω∙RV in0.6=ω∙0.164755⟹ω=13.043ൗrad s =124.6192rpmP air=12ρAV 3=12×1.225×0.3012948×53=23.0682watt TSR = 0.6Velocity = 5 m/se RPM = 173.89TSR = 1Velocity = 5 m/se RPM = 289.95Time step calculationMeshingSolution and Post ProcessingSijal Ahmed MemonGeometry cleaningMeshingSolution and Post ProcessingSijal Ahmed MemonO r i g i n a l m o d e l w i t h r i b s a n d s h a f t (I G E S )M o d e l c l e a n e d i n S p a c e c l a i m (W i t h o u t r i b s a n d s h a f t )Domain creationMeshingSolution and Post ProcessingSijal Ahmed MemonD = 460 mm600 mm D60 mm60 mmInner domainH =0.9144mGap between bottom interface and ground = 295.5 mmTurbineInterfaceF r e e s t r e a m f l o wOuter domainInner domainInterfaceNamed selectionMeshingSolution and Post ProcessingSijal Ahmed MemonMeshing in ICEMCFDMeshingSolution and Post ProcessingSijal Ahmed Memon• 6.9 million cells in fine mesh•21 prism layer for capturing boundary layer •Refined mesh in critical areas such as wake. •Two other meshes were also created for mesh independence study (coarse and medium). •Y+ < 2Wake regionmeshingNote:We will use coarse mesh for unsteady simulation as it saves time. But for accuracy make meshindependence study and choose mesh accordingly.21 prism layers for boundary layerMeshing in ICEMCFD (Mesh sizing for all three meshes)MeshingSolution and Post ProcessingSijal Ahmed MemonDensity box = 0.08Global size =0.08Size function :0.02 10 20No of Prism layers :3→9Density box = 0.04Global size =0.06Size function :0.01 10 20No of Prism layers :5 →15Density box = 0.02Global size =0.02Size function :0.06 10 20No of Prism layers :7 →21Meshing in ICEMCFD (Mesh sizing for all three meshes)MeshingSolution and Post ProcessingSijal Ahmed MemonMedium MeshAll outer boundaries = 0.4Interface face = 0.04Density box = 0.08, 1.2Prism layers = 7Coarse MeshPrism layers on ground 3 →9Fine MeshAll outer boundaries = 0.4Interface face = 0.04Density box = 0.06, 1.2Prism layers = 7Mesh independence studyIntroductionProblem descriptionGeometry and domain MeshingSolution and Post Processing3D URANS CFD analysis of Innovative Savonius Turbine (VAWT) Using ANSYS Fluent Sijal Ahmed MemonCoarse MeshMedium Mesh Fine Mesh1020930cells2779297cells 6919714cellsBoundary conditions and time stepMeshingSolution and Post ProcessingSijal Ahmed MemonBoundary condition Parameter Inlet (Velocity inlet) 5 m/sec (TSR = 0.6) Outlet (Pressure outlet) 0 gauge pressure Top and two sides Symmetry Bottom Wall Blades WallInterfacesInterfaces (used for Mesh motion)Inner domain rotational speed 13.043 rad/s or 124.6192 rpm Time step0.006687 s for 5 deg per time step 0.001337 s for 1 deg per time stepProblem Setup and solution in Fluent (General settings)MeshingSolution and Post ProcessingSijal Ahmed Memon•Import both meshes using import/read and append command. •Set interfaces in both zones.•Define velocity at inlet as 5 m/s.•Set frame motion as 13.043 rad/sec or 124.6192 rpm .•Bottom boundary is defined as wall, while all other outer boundaries (top, side1, side2)are defined as symmetry.•SST turbulence model•SIMPE for velocity pressure coupling •Frame motion and mesh motionOuter DomainInner DomainTSR = 0.6Setting up transient simulationMeshingSolution and Post ProcessingSijal Ahmed Memon•Use SIMPLE as this reduces memory requirements and also time per iteration as compared to coupled solver. •Solve case as steady state using frame motion with 1st order flow and turbulence schemes. •After 100-150 iterations, switch to unsteady and mesh motion. •Solve first for 5 deg rotation of blades for each time step. (solve for atleast one to two cycles)•Then change it to 1 deg rotation for each time step (time step calculation is given in next slide) (solve for 1-2 cycles)•Then use 2nd order schemes for all flow and turbulence parameters. Also change time formulation to 2nd order implicit.(run for 2-5 cycles to stabilize)•Now setup report definition for torque (moment n-m) and run case for 5 cycles(1800 time steps).•Also save data for post processing in CFD-Post using calculations activities or from file menu.•Open torque data from files in working directory using excel. Take average data and get power from it and then CpEffect of domain extend on simulation results Meshing Solution and Post Processing Sijal Ahmed MemonD = 460 mm6DStrong reflection atdomain boundariesModified outer domain MeshingSolution and Post Processing Sijal Ahmed Memon19D (8760 mm)No reflection at domainboundariesD = 460 mmSolution convergence for transient caseEffect of time step and 1st & 2nd upwind scheme on solution convergence Meshing Solution and Post Processing Sijal Ahmed MemonAfter this, record torque values (new fresh graph from report definition) for 5 cycles i.e. 5 * 360 = 1800 time steps.∆t =0.06687s for 5deg∆t =0.001337s for 1degExporting transient data for post processing in CFD-PostMeshingSolution and Post Processing Sijal Ahmed MemonAnimation from 3D transient caseMeshingSolution and Post ProcessingSijal Ahmed MemonAnimation from 3D transient caseMeshingSolution and Post Processing Sijal Ahmed MemonVelocity vectors at different sectionsMeshingSolution and Post Processing Sijal Ahmed MemonPath linesMeshing Solution and Post Processing Sijal Ahmed MemonTurbine performance (Time averaged Torque i.e. mean torque)Meshing Solution and Post Processing Sijal Ahmed MemonComplete torque history Torque history for 5-6 cyclesPeriodically converged Torque for last 5 cycles (1800 time step)Periodically converged Torque for last 5 cycles (take last 1800 time steps from report file )Data averaging for finding out mean torque(Time Averaged) in Excel ∆t =0.001337s for 1degTurbine Performance and comparison to known dataIntroductionProblem description Geometry and domainMeshing Solution and Post Processing 3D URANS CFD analysis of Innovative Savonius Turbine (VAWT) Using ANSYS Fluent Sijal Ahmed MemonAverage Torque for five cycles = 0.204245 N-MAverage Power = T.ω=0.204245×13.043=2.66WC p = 2.6623.068=0.1151.The cp is around 0.12 which is within performance band for savonius turbine2.Although maximum Cp is 0.15 for this type of turbine but this can be due to many reasons.a)Might be we get it at some other TSR b)For this design may be Cp range is changed and can only be confirmed by running at various TSRs.c)It can also be due to mesh, so you are encouraged to use two more meshes i.e. medium and fine and run the case as described earlier and see the effect on Cp value d)Run case at other TSR such at 0.4, 0.8, 1 and 1.2 and see what you get! P air =23.0682watt×Taking average torque from five cycles vs one cycle (SA model)MeshingSolution and Post ProcessingSijal Ahmed Memon-0.050.050.10.150.20.250.30.350.40.45-20030080013001800T o r q u eTime stepTime step vs Torque for five cycles-0.050.050.10.150.20.250.30.350.40.4504080120160200240280320360T o r q u eTime stepTime step vs Torque for one cycleAverage torque = 0.21329 N-mAverage torque = 0.21327N-mTurbulence model Study (Coarse mesh, time step = 0.00133 1 deg = 1 time step)MeshingSolution and Post ProcessingSijal Ahmed MemonTorquePower CP SST (SIMPLE)0.204245 2.660.115SA (SIMPLE)0.2133 2.7820.121SA (Coupled)0.21482.8020.1214RKE (Coupled)0.2075 2.7070.117•It was not possible to run RKE with SIMPLE. Therefore coupled was used with RKE turbulence model •I have checked coupled and SIMPLE for SA model and results are almost similar.•For RKE model, torque is averaged for one cycle. As it was very expensive to run coupled solver for many cycles.Turbulence model Study (comparison of SA and RKE model)MeshingSolution and Post ProcessingSijal Ahmed Memon-0.10.10.20.30.40.560068076084092010001080116012401320T o r q u eTime stepTime step vs Torque for two cyclesSA RKETurbulence model Study (Y+ Contours)MeshingSolution and Post ProcessingSijal Ahmed MemonMesh Independence Study (SST , SIMPLE, time step = 0.00133, 1 deg = 1 time step)MeshingSolution and Post ProcessingSijal Ahmed MemonMesh countTorque Power C P % change (C P )Coarse Mesh1.02million 0.20422.660.115-Medium Mesh2.78 million0.21192.760.11984%TSR = 0.6•Wind turbines are devices to convert kinetic energy of air to mechanical shaft energy and subsequently to electrical energy.•In this Course/Workshop you will learn about Leaf turbine CFD analyses and comparison of results with available data.•Leaf turbine is innovative Savonius vertical axis wind turbine (VAWT)We will solve 3D transient case,and you will understand how to solve and post process 3D transient wind turbine CFD analysis.For this case ,we will unsteady method i.e.URANS (Unsteady Reynolds Averaged Navier Stokes Equations).3D URANS CFD analysis of Innovative Savonius Turbine (VAWT) Using ANSYS Fluent by Sijal Ahmed MemonWake region meshingTorquePowerCPSST 0.204245 2.660.115SA 0.2133 2.7820.121RKE (Coupled)0.20752.7070.117。
Wind Turbines
– Noise issues with the local community
Schematic of Wind Turbines
Basics of Wind Turbine Design
• Wind turbines are designed to exploit the wind energy that exists at a location. • Aerodynamic modeling is used to determine the optimum tower height, control systems, number of blades and blade shape. • Wind turbines convert wind energy to electricity for distribution. • Conventional horizontal axis turbines can be divided into three components. • The rotor component, which is approximately 20% of the wind turbine cost, includes the blades for converting wind energy to low speed rotational energy. • The generator component, which is approximately 34% of the wind turbine cost, includes the electrical generator, the control electronics, and most likely a gearbox component for converting the low speed incoming rotation to high speed rotation suitable for generating electricity. • The structural support component, which is approximately 15% of the wind turbine cost, includes the tower and rotor yaw mechanism.
英语PPT：风电
Traditional energy and electricity generation
Although there are many different sources of energy available, more than three-quarters of the energy used in developed countries comes from oil, gas and coal. Currently the thermal power plants of our country, which take up more than 70% of the installed capacity of China’s electrical power system, use coal as fuel.
发动机箱 Engine box 包含：
变速箱
Transmission 发电机
Generator 电子控制装置
Electronic control 偏航控制器
Yaw controller 制动装置
Brake Device
高空风能发电High-altitude wind power
发动机箱
Engine box 变速箱
The shortcomings of hytro- power
Water to drown large areas of land, may lead to __________ destruction aencdoliof gthiceallarge _________ once collapse, the consequences wreosueldrvboeirdsisastrous. In addition, a country's water resources are limited, but also by the impact of the season.
Wind_Turbine_Technology
Lift vs Drag VAWTs
Lift idity, aerofoil blades – More efficient than drag device
Drag Device “Savonius”
– High solidity, cup shapes are pushed by the wind – At best can capture only 15% of wind energy
Tip-Speed Ratio
Tip-speed ratio is the ratio of the speed of the rotating blade tip to the speed of the free stream wind. There is an optimum angle of attack which creates the highest lift to drag ratio. Because angle of attack is dependant on wind speed, there is an optimum tip-speed ratio
• Components can be mounted at ground level
– Ease of service – Lighter weight towers
• Can theoretically use less materials to capture the same amount of wind
α = High Stall!!
Apparent Wind & Angle of Attack
ΩR Ωr
α V V
VR = Relative Wind
α = angle of attack = angle between the chord line and the direction of the relative wind, VR . VR = wind speed seen by the airfoil – vector sum of V (free stream wind) and ΩR (tip speed).
风力发电技术概述作文英语
风力发电技术概述作文英语Wind power, as a renewable energy source, has garnered significant attention in recent years due to its potential to mitigate climate change and reduce dependence on fossil fuels. In this essay, we will provide an overview of wind power technology, its development, current status, and future prospects.1. Introduction to Wind Power:Wind power involves harnessing the kinetic energy of wind to generate electricity. This process typically involves wind turbines, which consist of blades mounted on a rotor connected to a generator. As the wind blows, it causes the rotor to spin, generating electricity through the generator.2. Development of Wind Power Technology:The concept of using wind energy dates back centuries,with early windmills used for tasks like grinding grain or pumping water. However, modern wind power technology began to emerge in the late 19th and early 20th centuries with the development of electricity generation. The first electricity-generating wind turbine was built in Scotland in 1887 by Professor James Blyth.3. Evolution of Wind Turbines:Over the years, wind turbine technology has advanced significantly. Early turbines were small and inefficient compared to modern designs. Today, wind turbines come in various sizes and configurations, ranging from small turbines used for residential applications to largeutility-scale turbines found in wind farms.4. Types of Wind Turbines:There are two primary types of wind turbines:horizontal-axis turbines (HAWTs) and vertical-axis turbines (VAWTs). HAWTs are the most common type and feature blades that rotate around a horizontal axis. VAWTs, on the otherhand, have blades that rotate around a vertical axis. Each type has its advantages and disadvantages, and the choice depends on factors like wind conditions and application.5. Current Status of Wind Power:Wind power has experienced rapid growth in recent decades, driven by factors such as technological advancements, government incentives, and increasing environmental awareness. According to the Global Wind Energy Council, the cumulative installed capacity of wind power reached over 700 gigawatts by the end of 2021, with significant contributions from countries like China, the United States, and Germany.6. Advantages of Wind Power:Renewable: Wind energy is renewable and abundant, making it a sustainable alternative to fossil fuels.Clean: Wind power generates electricity without emitting greenhouse gases or other pollutants, helping tomitigate climate change and improve air quality.Cost-effective: The cost of wind energy has declined significantly in recent years, making it increasingly competitive with conventional energy sources.Job creation: The wind industry creates jobs in manufacturing, installation, maintenance, and other sectors, contributing to economic growth.7. Challenges and Limitations:Despite its many advantages, wind power also faces challenges and limitations. These include:Intermittency: Wind is inherently variable, and electricity generation from wind turbines fluctuates depending on wind speeds.Land use: Wind farms require large areas of land, which can raise concerns about land use conflicts and environmental impacts.Visual and noise impacts: Wind turbines can be visually and audibly intrusive, leading to opposition from local communities.Infrastructure requirements: Wind power infrastructure, such as transmission lines, may require significant investment and planning.8. Future Prospects:Despite these challenges, the future looks promisingfor wind power. Continued advancements in technology, such as larger and more efficient turbines, improved energy storage solutions, and smarter grid management, will help overcome many of the current limitations. Additionally, supportive government policies and growing public demandfor clean energy are expected to drive further expansion of wind power worldwide.In conclusion, wind power technology has made significant strides in recent years and has emerged as akey player in the transition to a more sustainable energy future. With ongoing innovation and investment, wind power will continue to play a crucial role in reducing carbon emissions and ensuring energy security for generations to come.。
新能源英语词汇
新能源英语词汇风电词汇中英文对照表abrasive 研磨料abrasive disc 磨料盘accumulator 储压罐acetone 丙酮activation 活动，赋活，激活，活化，激励，启用acute angle 锐角adhesive 带粘性的, 胶粘, 粘合剂 adjustable spanner 活动扳手admixture 混合, 混合物adversely 逆地, 反对地adze 扁斧aerial 航空的, 生活在空气中的, 空气的, 高耸的,天线aerosol 浮质,气溶胶, 气雾剂, 烟雾剂 aggregate 合计, 总计, 集合体aggressively 侵略地, 攻势地air inlet 通风口air-cushion vehicle 气垫船air gap 气隙align 对准，校直，定位;调,排列, 使结盟, 使成一行alkali-sensitive 碱性感测allen key 六方allen wrench 六方扳手alloy 合金alteration 变更, 改造alternator 交替符;交流发电机 ammeter 安培计，电流表anaerobic 没有空气而能生活的, 厌氧性的 anchor 锚, 抛锚, 锚定aneroid barometer 无液气压表, 无液晴雨 angle grinder 角锉angle plate 角盘annealing 退火annulus 环面anode 阳极, 正极anodization 阳极氧化antenna 天线;触角antifriction 减低或防止磨擦之物, 润滑剂 anvil 铁砧approximate 近似, 接近, 约计 adj arbor 树阴;凉亭;藤架〈机〉柄轴;心轴arc 弧, 弓形, 拱,电弧中华人民共和国国家标准电工术语风力发电机组Electrotechnical terminology Wind turbine generator systems 1 范围本标准规定了风力发电机组常用基本术语和定义。
升力型风力机与升阻型风力机气动性能分析
升力型风力机与升阻型风力机气动性能分析杨从新;史广泰;李振朋【摘要】为深入研究升阻型风力机与升力型风力机的气动性能，基于CFD软件，采用k-w SST湍流模型，利用双滑移网格技术对2者的启动风速和切入风速进行流场计算，研究在低风速下2种风力机的气动性能。
结果显示：升阻型风力机具有较大的启动力矩、较小的切入风速以及较小的启动风速；升阻型风力机在低风速下比升力型风力机更容易启动，且在失速之前升阻型风力机的输出功率较大，但在失速之后升阻型风力机输出功率低于升力型风力机。
%In order to deeply research aerodynamic performance for lift wind turbine and lift-drag wind turbine , based on the CFD software this article used k-ωSST turbulent model ,adopted double moving mesh technology ,carried out field calculation on lift wind tur-bine and lift-drag wind turbine, calculated their start-up wind speed and cut-in wind speed, research their aerodynamic performance under low wind speed .The result showed that lift-drag wind turbine had the larger starting torque , smaller cut-in wind speed and smal-ler start-up wind speed ;lift-drag wind turbine was easier to start-up than lift wind turbine at low wind speed while the lift-drag wind tur-bine’s output power was larger before stall , but its output power was lower than that of lift wind turbine after stall .【期刊名称】《西华大学学报（自然科学版）》【年(卷),期】2014(000)001【总页数】4页(P104-107)【关键词】升阻型风力机;双滑移网格;流场计算;启动风速;切入风速【作者】杨从新;史广泰;李振朋【作者单位】兰州理工大学风能技术研究中心，甘肃兰州 730050;兰州理工大学风能技术研究中心，甘肃兰州 730050;兰州理工大学风能技术研究中心，甘肃兰州 730050【正文语种】中文【中图分类】TK8传统的垂直轴风力机主要分为2类，一类是利用翼型的升力做功的风力机，称为升力型风力机，最典型的结构是达里厄式(Darrieus)风力机[1]。
风电专业术语中英文对照
36、 下风向 down wind
实用标准
59、 冻雨 freezing rain
37、 上风向 up wind
60、 雾凇;霜 rime
38、 阵风 gust
61、 雾 fog
39、 粗糙长度 roughness length
62、 盐雾 salt fog
40、 湍流强度 turbulence intensity
17、 风轮转速（风力机）rotor speed (for wind 33、 平均风速 mean wind speed
turbine)
34、 极端风速 extreme wind speed
18、 控制系统（风力机）control system (for wind
文档
35、 风切变 wind shear
功率特性测试
55、 空气湿度 air humidity
75、 功率特性 power performance
56、 绝对湿度 absolute humidity
76、 功率系数 power coefficient
57、 相对湿度 relative humidity
77、 扫掠面积 swept area
112、 风轮 wind rotor
94、 基准高度 reference height
113、 风轮直径 rotor diameter
95、 基准粗糙长度 reference roughness length 114、 风轮扫掠面积 rotor swept area
96、 基准距离 reference distance
159、 叶尖速比 tip-speed ratio
181、 增速齿轮副 speed increasing gear pair
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垂直轴无铁芯盘式风力发电机
垂直轴无铁芯盘式风力发电机是我公司新开发的一种具有国际领先科技的发
电机产品，产品远销欧州、美州、澳州东南亚等地区，其突出的优点越来越受到
用户的好评：
1、 启动风速低。垂直轴无铁芯盘式风力发电机由于采用了无铁芯技术，降低了
转子的转动惯量，并不存在永磁与铁芯间的磁阻力，因而在微风状态下即可
启动，经测试可在风速为1—1.5m/s时启动发电；
2、 体积小，重量轻。此发电机依靠独特巧妙的设计和本身的无铁芯技术，重量
为一般发电机的一半；
3、 发电效率高。 此发电机无铁芯导磁，我们经过上千次的试验和计算，从结
构和选材上攻克了无导磁所带来的发电效率低的缺点，同时其发电机也不存
在铁芯所带来的铁损现象，最终测试表明：此发电机发电效率比同类发电机
高出20%—35%；
4、 噪声低,寿命长。此发电机为直驱电机，所以不存在齿轮等传动机构的磨损现
象，再加上垂直轴风力发电机其发电时转速低，受力均匀等优点，使得此发
电机的寿命为普通发电机的2倍，而且噪声约为零，最适合居民区使用；
5、 安装简单。由于此发电机为垂直轴风力发电机，所以安装时无需考虑风向问
题，再加上无动态联接的输电接头，在安装时尤为方便。
网址：http://yeguobing20088.cn.alibaba.com/
No core disc vertical axis wind turbines
No core disc vertical axis wind turbine is our company developing a new
generation of international leading technology products,
Products are
exported to Europe, America, Australia ,Southeast Asia
and so on.it well
received by more and more users with its outstanding advantages
1 start low wind speed. vertical axis wind turbine as non-core disc using a
non-core technology, reducing the rotational inertia of the rotor magnet and the
core does not exist between the magnetic resistance, so you can start state in
the breeze , tested in wind speed for 1-1.5m / s when you start the power
generation;
2 small size, light weight. because the generator with unique design and
ingenious no-core technology, the weight as half of the general generators;
3, power generation efficiency. The non-core magnetic generator, we passed
thousands of tests and calculations on the structure and the capture of non-magnetic
material selection brought about by the low efficiency of power generation, while its
core brought generators did not exist to the iron loss phenomena, the final test
showed that: the power generation efficiency higher 20%- 35% than comparable
generators;
4, low noise. Long life. The generator for the direct drive motor, so there is no
transmission gears and other wear and tear phenomenon, coupled with the vertical
axis wind turbine power generation when its speed is low, the advantages of the
balanced force, making the life of this generator for the common generator 2 times,
but the noise is about zero, the most suitable residential use;
5 easy to install. we no need to consider wind direction when installed on
the issue because of the vertical axis wind turbine generator, once again the
non-dynamic link in the transmission connection, so installation is particularly
easy.