TECHNICAL SPECIFICATIONS


Contents:

 



Helix-Windturbine Wind of Change
Height without mast: 2100mm,
Diameter: 1400 mm







Above: Nature as a Template.
The Helix design of the wind turbine!

Below: Functional Diagram
The wind permeable vertical Savonius Rotor

Innovative Technology – Tried and Tested!

Extensive wind tunnel tests and numerical flow calculations were used to develop and optimize an ultra-lightweight slow speed vertical small wind turbine system, using the highest possible levels of efficiency and based on the Savonius rotor.

For months, we developed, calculated and optimized this innovative rotor form which enables a higher yield of the oncoming wind. The new wind turbine follows the classic Savonius idea, but has a new innovative rotor geometry, which thanks to an intelligent flow design, avoids pressure differences, outages and turbulence. The wind turbine Wind of Change with its characteristic helical shape has an increase in output of more than 28 percent in complex 3D aerospace engineering flow analysis tests, when compared with conventional vertical resistance runners.

Ultra-lightweight rotor made from modern high-performance composites, consisting of two horizontal lens discs, attached to a vertical rotor axis, between which two or more semicircular curved blades are vertically mounted.

The blades are arranged offset from one another, so that a part of the wind is diverted from the right and left openings to the scooped sides of the blades and can therefore act on the reverse side of one of the concave blades. The action is based both on aerodynamic lift as well as resistance induced tunneling.

A vertical axis turbine (VAWT: Vertical Axis Wind Turbine) functions regardless of the wind direction.

The spiral structure of the helix design ensures that even during turbulence, the wind can have an effect on every part of the surface area. The shape of the helix was inspired by nature (Bionics) and resembles the human DNA structure. 210 to 280 Watts of electrical power can be generated per square meter of windswept rotor surface area.

 



 

 

 

 

3KW-Turbine

Helix-Windturbine Wind of

Change with 4200 mm Height and 3 KW Power

 

 

Video abspielen

Video: Flow mechanics calculations and analysis of the wind flow velocities in the Savonius rotor.

Video abspielen

Video: Flow  mechanics calculations and analysis of the stress flow in the Savonius rotor.

 

High efficiency, even at low wind speeds!

Outstanding features of the Helix Wind Turbine WIND OF CHANGE.

The developed vertical axis helical rotors have the following advantages over conventional systems with a horizontal axis:

  • The wind is permanently accessed from all directions, without the requirement of a yaw mechanism
  • High output even at a low wind speed of 2.8 m/s (10 km/h)
  • Strong wind gusts are easily managed and eliminates the need for complex adjustable blades
  • The system does not require a shut down even during a storm (other turbines are at shut down at  wind speeds in excess of 24-27 m/s)
  • Constant uninterrupted output in high winds
  • The system is robust, shows little wear, it is maintenance-free, has low operating costs and the mechanical structure is not complex
  • Use of permanent magnet generators with long life and low speed
  • High uptime
  • Practically silent operation
  • There are no dynamic shadows, as is with horizontal wind turbines.
  • Extremely low starting torque and therefore good electromechanical conversion of the kinetic energy
  • No special foundations are required, a simple bracing is in most cases sufficient. Easy installation on the ground, roof and wall mounted
  • The use of advanced fiber composites ensures an ultra-lightweight construction with maximum strength and UV resistance and therefore high efficiencies
  • Modular and highly flexible construction (equal part-modular principle). Individual components can be replaced at any time. A power increase via retrofitting is possible at any time
  • The helical structure provides the wind with sufficient engagement surface at all times and at every angle of rotation
  • Ultra-modern, rational and cost-effective production
  • Performance optimization using the latest power electronics
  • Uniform rotary motion
  • No mechanical losses, since the system operates without gearing (direct transmission)
  • Extremely profitable due to low cost, easy installation and maintenance-free operation with a virtually unlimited lifetime
  • Excellent aerodynamic efficiency
  • Superior optical effect
  • Can be used as an advertising medium

Flachdachmontage
Helix Wind Turbine Wind of Change installed on an office building

Practically Silent!

Our Helix Wind Turbine WIND OF CHANGE is a very quiet working unit.
The aim of our investigations was to determine the noise level from the generator and the Helix Wind turbine relative to the wind speed, for individuals who live or work in the immediate vicinity.
Even at more than 10 m / s wind speed no meaningful value could be determined, since the ambient sounds of the surroundings were louder than the helix wind turbine.

km/h

m/s

Generator

dB

dBin

1 mDistanz

dBin

5 mDistanz

dBin

10mDistanz

3,60

1

0

0

0

0

7,20

2

0

0

0

0

10,80

3

0

0

0

0

14,40

4

0

0

0

0

18,00

5

0

0

0

0

21,30

6

10

0

0

0

25,20

7

16

0

0

0

28,80

8

22

12

0

0

32,40

9

30

16

0

0

36,00

10

38

21

15

0

43,20

12

46

26

20

0

50,40

14

49

31

24

0

57,60

16

50

37

29

0

64,80

18

54

42

34

0

Type list and technical data.

Technical data of the HELIX Windturbine WIND OF CHANGE.

No.

Description

Characteristics

Comments

 

 

Wind of Change 1400

Wind of Change3500

 

1

Application

Homes

Commercial Property

 

2

Rotor diameter

1750 mm

1750 mm

 

3

Turbine height

2450 mm

4650 mm

Modular adjustable

4

Wind load area

5,6 m²

11,2 m²

Modular adjustable

5

Helix angle

Helix 0-45 ° expandable to 180 °

Modular adjustable

6

Start wind speed

1,4 m/s

1,4 m/s

 

7

First electrical output

2,8 m/s

2,8 m/s

 

8

Rated wind speed

7-9 m/s

7-9 m/s

 

9

Rated speed per minute

100 RPM

100 RPM

 

10

Rated capacity

1 kW

3 kW

Depending on
Generator, height
and diameter

11

Rated output at

12 m/s Wind speed

12

Maximum Electrical Performance

1,4 kW

3,5 kW

Depending on
Generator, height
and diameter

13

Storm shutdown

No

No

Max. 40 m/s

14

Yaw

Tracking is not necessary, Wind direction Independently

 

15

Type drive

Direct drive without Gear, no mechanical losses

 

16

Total turbine weight

98 kg

210 kg

 

17

Generator type

Permanent magnet 3-phase Alternating current generator, a direct drive, Protection IP 54

18

Working temperature range

- 35 °C bis + 80 °C

 

19

Use for home power supply

Voltage Selector 12 VDC, 24 VDC, 230 VAC 50 Hz, Protection class IP33

 

20

Use public power supply

Grid connection with inverters

 

21

Noise emission

Natural wind noise, no intrinsic noise

 

22

VAWT Wind turbine optics

Suitable as advertising space, Wind turbine according to color desire

 

 

 

The most modern power electronics:
Helix Wind Turbine WIND OF CHANGE.

In cooperation with Grass Power Electronics GmbH, ib process control engineering GmbH and the University of Nuremberg, power electronics have been specifically developed for Helix Wind Turbine Wind of Change, which control the optimum interplay of wind power, speed and power feed. A special low-speed generator is integrated in the lower lens body of the wind turbine system, to produce a direct connection from the wind turbine to the generator.

The specially developed for HELIX Wind Turbine WIND OF CHANGE power converter converts the energy generated by the small wind turbine system so that this can be fed into the household consumer unit.
The electricity produced by the newly developed generator, is fed 3-phase with 400 VAC into the power converter. The generator power converter then switches the power to 600 VDC, which flows into an intermediate voltage circuit. The intermediate circuit voltage of 600 VDC is transformed into 400 VAC / 50 Hz / 16 A by the power converter and can therefore be fed as 3 - phase into the household consumer unit.

Communication interfaces enable the connection and transfer of the data to PC via Ethernet and remote system access via the Internet.

 

General plan of the power converter:

 

Product Specifications


Intelligent power electronics with safety features.
In normal use the power electronics convert the current so that it can be fed into the household consumer unit or the national grid.

In case of error, the power electronics act intelligently:

  • If the maximum speed of the generator is exceeded, a load resistor (heating element) is automatically activated by the system and slowly brakes the generator including the helix wind turbine to the rated speed.
    If the house or the public network are overloaded, the grid monitoring reacts and ensures that neither network nor plant are damaged.

  • If feeding into both networks is not possible, then the power electronics couple out. The generator turns freely. Voltage is induced but there is no flow of current. As no current flows, the generator is therefore not charged and is just idling. Speed ​​and voltage are both monitored by the power electronics. If there is too high a speed and / or too high a voltage in the generator, then the heating element is activated.

  • If there is a total power failure and the power electronics have no power supply, the heating element is activated and remains active until the power supply of the power electronics is restored.

  • If the generator creates more power than the household network consumes, the electronics respond and the excess energy is dissipated into the national grid.
    Example: The generator produces 600 W, but the household network consumes only 200 W. In this case, the excess 400 W is transferred to the national grid. Should this lead to a power overload, the grid monitoring system responds.

Connecting a wind sensor:

The connection of a wind sensor is possible. There are two analogue options to connect the wind sensor:

  • DSP controller board
  • Communication Board

The DSP controller board has two free current inputs. These are designed to a level of ± 20 mA. The level can be adjusted via a small operational amplifier circuit at the input. The communication board has an input level of 0-1.8 V. Here, the input level can be adjusted from 0-10 V via a switch. The wind sensor requires an analogue output. Alternatively, this can also be connected via a bus (RS232, RS485, CAN).

Operating with a battery:

The power electronics enables two options:

  • DC - voltage output from the intermediate DC circuit. This is possible via connection of the battery and the charge controller to the intermediate DC circuit and a software adaptation. The charge controller and the battery management system (BMS) have to provided by the user. In this case, the charge controller requires a 600 VDC input.

  • Feeding into the network and charging the battery with 230 VAC or connecting the battery or accumulator to a 400 VAC power supply. Charge controller and (BMS) have to be provided by the user.


Connection for grid feed:


A 5-pole, 16 A (400 VAC) connector is provided. The customer just requires a 5-pole, 16 A (400 VAC) wall socket.

Technical Specifications:

Operating principle of an overall system: