Making of wind turbine and related calculation
Sponsored Links
This presentation is the property of its rightful owner.
1 / 43

風力發電機製作 及 相關物理計算 MAKING OF WIND TURBINE AND RELATED CALCULATION PowerPoint PPT Presentation


  • 77 Views
  • Uploaded on
  • Presentation posted in: General

風力發電機製作 及 相關物理計算 MAKING OF WIND TURBINE AND RELATED CALCULATION. 香港理工大學 應用物理學系學生 翟振亨 HKPU Applied Physics Student Chka Chun Hang. 目錄. 引言 理論 發電機的設計 製作過程 相關計算 演示. Where do winds come from? 風從哪裡來 ?. Because of the temperature differences( 溫差 ) around the world. Surface Wind.

Download Presentation

風力發電機製作 及 相關物理計算 MAKING OF WIND TURBINE AND RELATED CALCULATION

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


風力發電機製作

相關物理計算

MAKING OF WIND TURBINE

AND RELATED CALCULATION

香港理工大學

應用物理學系學生

翟振亨

HKPU

Applied Physics Student

Chka Chun Hang


目錄

  • 引言

  • 理論

  • 發電機的設計

  • 製作過程

  • 相關計算

  • 演示


Where do winds come from?風從哪裡來?

  • Because of the temperature differences(溫差) around the world

Surface Wind

Convection updraft of rising warm Air


What is wind turbine(風力發電機)?

Wind’s kinetic energy(動能)

->electrical energy(電能)


Theory理論

  • By Lenz’s Law (冷次定律)

    Induced current(感生電流) opposes(對抗)the change of the magnetic force

    Heinrich Lenz

    海因里希·冷次


Theory理論


Theory理論


Induced emf-感生電壓

Where ,

  • N is the number of turn of coil,

  • B is the magnetic field strength

    (磁場強度)

  • A is the area(面積) of the coil


Design-設計


Design-設計 (3D View)


Design-設計 (3D View)

Brace 支架


Design-設計 (3D View)

Axle 軸


Design-設計 (3D View)

Turbine 渦輪


Design-設計 (3D View)

Rotor 轉片


Design-設計 (3D View)

Coil 電線圈


Design-設計 (3D View)

Supporting Base

支撐底部


Design-設計 (3D View)

Magnet 磁鐵


Material-物料

  • Screw(螺絲) x 8Bearing(滾珠軸承)x 2

  • Wooden borad(5”x10”) Wooden board(2”x10”)

  • Copper wire(漆皮銅線) Chopstick(筷子) x 3

  • Water bottle(水樽)Magnet (磁石)x 4

  • LED 燈x 1CD case x 1

  • )


Making Process-製作過程

  • 1. Preparing the material


Making Process-製作過程

  • 2.making the frame(骨架) and base

1

2

3


Making Process-製作過程

Finished product


Making Process-製作過程

  • 3. Assembly(集合) the CD case and the base

1

3

4

2


Making Process-製作過程

  • 4. making the coil by the copper wire


Making Process-製作過程

  • 5. assembly to the CD case


Making Process-製作過程

  • 5. assembly to the CD case


Making Process-製作過程

  • 6. making the rotor(轉片)


Making Process-製作過程

  • 6. making the rotor (轉片)

2

3

1


Making Process-製作過程

  • 7. making the turbine(渦輪)

1

3

2

4


Making Process-製作過程

  • 7. making the turbine (渦輪)

5

7

6


Making Process-製作過程

  • 8. assembly all the component(部件)


Final Product-製成品

Finish!!


Calculation

相關計算


Power(功率) of Wind turbine

  • kinetic energy of a mass in motions is:

  • The power in the wind is given by the rate ofchange of energy:

  • As mass flow rate is given by:


Power (功率) of Wind turbine

  • Also, the rate of change of distance is given by:

  • we get:

  • Hence, the power can be defined as:


Power (功率) of Wind turbine

Power coefficient(功率系數),

Cpmax= 0.59

Therefore, the extractable power:

No wind turbine can convert(轉換)more than 16/27 (59.3%) of the kinetic energy of the wind into mechanical energy turning a rotor.

German physicist

Albert Betz

Picture captured from http://www.eoearth.org/article/Betz,_Albert


Power (功率) of Wind turbine

  • For this turbine,

    假設 ,

  • Power Coefficient(功率系數), Cp = 0.5

  • Air density(密度), ρ = 1.23 kg/m3

  • Area of blades(扇葉), A= 0.04*0.2 = 0.008 m2

    Wind speed(風速), v = 20km/h = 5.56 m/sec

    所以,

  • P = ½*0.5*1.23*0.008*5.563

    = 0.423 W


Induced voltage-感生電壓

  • Since,

    Thus,


Induced voltage-感生電壓

  • Normally, an AAbattery(電池) is having 1.5V


Applications(應用)


Factor (影響因素)

Factor(影響因素) of output voltage:

  • Wind speed(風速)

  • Strength of magnet(磁石強度)

  • *The number ofturns of coil, N(線圈圈數)

  • *Internal resistance of wire, r(電線內阻)

  • Since因為 N->r,Iout


延伸探究

  • 內阻同圈數對於輸出電流的連帶關係

  • 計算輸出功率

  • 計算效率


Demonstration-演示



  • Login