ASKA Energy CZ-250 Wind Turbine Specification

ASKA Energy CZ-250 Wind Turbine Specification

ASKA Energy CZ-250 Wind
Turbine Specification
Roger Beecroft
ASKA Energy Services
September 6, 2012
CONTENTS
1.
Introduction .................................................................................................................................................... 3
2.
System Protection ........................................................................................................................................... 3
3.
Power Curve and Annual Output .................................................................................................................... 4
4.
Noise emmissions ........................................................................................................................................... 5
5.
General Specification ...................................................................................................................................... 5
5.1.
Rotor Assembly ..................................................................................................................................... 5
5.2.
Tower..................................................................................................................................................... 5
5.3.
Blade ...................................................................................................................................................... 5
5.4.
Generator .............................................................................................................................................. 6
5.5.
Gearbox ................................................................................................................................................. 6
5.6.
Brake Unit .............................................................................................................................................. 6
5.7.
Operational Data ................................................................................................................................... 6
5.8.
Inverter .................................................................................................................................................. 6
5.9.
Elevation ................................................................................................................................................ 7
5.10. Foundation ............................................................................................................................................ 8
1. INTRODUCTION
The CZ -250 Vertical Axis Wind Turbine (VAWT)is a natural evolution of the established CZ – 10 50kw range of VAWTs which have been in production since 2007.
The VAWT range includes a number of unique patented design features that give them exceptional
performance incorporated in a relatively simple design. These include:
•
A very low start-up speed of just 1.8 m/s and a very low rated wind speed of 7-10 m/s which
combined with the patented blade system contribute to a turbine that produces exceptional
energy output while being easy to maintain.
•
The turbines also include a number of remote monitoring features via the Scada link
including:
o Remote Performance monitoring
o Vibration Monitoring
o Visual Monitoring via a tower mounted camera
In the UK the turbines will be installed by Windtechnics UK Ltd and serviced every three months
using a supply of spare parts held at Windtechnics Warrington warehouse.
The turbines carry an optional 10 year warranty programme.
2. SYSTEM PROTECTION
Voltage Overload
Yaw Protection
Current Overload
Yaw Protection
High Wind Speed
Yaw Protection
High Rotational Speed
Yaw Protection
Brake System
Manual
3. POWER CURVE AND ANNUAL OUTPUT
Power curve CZ-250
Annual Output kWh
4. NOISE EMMISSIONS
Hub height wind speed [m/s]
Total noise level L Aeq,total [dB(A)]
Background noise level L Aeq,BG [dB(A)]
Margin (L Aeq,total - L Aeq,BG [dB(A)]
Apparent sound power level L WA,k [dB(A)]
4
59.3
32.2
27.1
87.3
5
61.2
33.6
27.6
89.2
6
63.2
35.0
28.2
91.2
7
65.1
36.4
28.7
93.1
8
67.0
37.7
29.3
94.9
9
68.9
39.1
29.8
96.8
10
70.7
40.5
30.2
98.7
Test certificates are provided in Appendix A
5. GENERAL SPECIFICATION
5.1. ROTOR ASSEMBLY
Diameter;
22m
Swept area;
380 sq. m
Rotational Speed;
40 RPM
Rotational Direction;
Clockwise
No. of blades;
3 sets of 3
Airbrake;
Yaw Protection
5.2. TOWER
Material
Hot-dip galvanised steel
Height
18m
Weight
4340kg
Bottom Diameter
1100mm
Top Diameter
900mm
Material;
Aircraft aluminum or Reinforced Fibreglass
Length;
12m
Width;
1000mm
Weight;
700kg
5.3. BLADE
11
72.7
41.9
30.8
100.7
5.4. GENERATOR
Vertical
Permanent Magnetic
DC480
Weight;
3000kg
5.5. GEARBOX
Planetary
Ratio 9:1
5.6. BRAKE UNIT
Manual drum brake
5.7. OPERATIONAL DATA
Cut-in wind speed;
1.8 m/s
Rated wind speed;
10 m/s
Cut-off wind speed;
28 m/s
Survival wind Speed;
38 m/s
5.8. INVERTER
CZ-250
Capacity
250kw
Input voltage
480VDC
Input voltage range
360V-560V
Transfer time
≤ 4ms Automatic transfer
Transfer efficiency
87-92%
Invert frequency
50Hz or 60Hz
Output voltage
Four steps AVR, 220V± 3% or 380V± 3%
Current
250A
Output wave form
Pure sine wave
Protections
Protection against short-circuit, over load, high-voltage, reverse
polarity protection and low-voltage protection
5.9. ELEVATION AND PLAN
5.10.
FOUNDATION
6. APPENDICES
6.1. APPENDIX A – NOISE CERTIFICATES
Noise certificates have been provided as supplied from the Test house in China