- Drive train concept
- Electrical system concept
- Nordex Control ™
- Grid compatibility
- Cold climate
- Standard operating temperature
- Rotor blade design
Meet the N149/4.0-4.5 onshore turbine for light and medium wind regions
The drive train is based on Nordex’s proven modular drive train concept that utilizes three-point suspension. Together with our qualified suppliers, we work to continuously improve our drive train components in order to maintain maximum availability while delivering the optimal energy output.
The N149/4.0-4.5 is equipped with a doubly-fed asynchronous generator and a partial converter. This is a proven and highly economical electrical system that we have employed since Nordex first introduced multi-megawatt turbines. With the launch of the N149/4.0-4.5, we rearranged the location of the converter and transformer from the base of the tower to the nacelle. This ensures a higher annual energy production and simplifies the tower internals.
More than 5,000 Nordex turbines have already been fitted with the tried and tested Nordex Control™ system. It handles the operational control, adjustment and monitoring of the turbine systems. Nordex Control offers permanent, protected access to turbine and wind farm data either on-site or remotely through a browser-based, interactive, secure platform. With its modular structure and standardised interfaces, Nordex Control™ can be flexibly configured to suit the customer’s SCADA requirements.
The turbines of Generation Delta meet the grid requirements of international markets. Thanks to their fault-ride-through capability our turbines can bridge voltage drops easily. In addition, the Nordex Wind Farm Management System also allows the grid operator to directly control the active and reactive power of the wind farm in the grid.
The tried and tested Nordex cold-climate package is designed to meet the challenges of especially cold locations. Turbines in the cold-climate version (CCV) can reliably operate down to an outside temperature of -30 degrees Celsius.
The standard operating temperature of the Generation Delta turbines is also applicable for the N149/4.0-4.5: the normal climate turbines can be operated even at -20 degrees Celsius – an advantage for generating the maximum annual yield.
The one-piece NR74.5 rotor blade developed in-house with a swept area of 17,460 square metres. Nordex essentially maintained the rotor blade structure and proven airfoil design used in previous turbine models while optimising the design for transport and production.
Nordex offers now a much larger rotor for the low to medium wind class. Extending the rotor diameter by 18 meters gives the N149/4.0-4.5 a 30 percent increase in swept area – producing significantly higher yields.
The N149/4.0-4.5 has a variable maximum output of between 4.0 and 4.5 MW, creating up to 28% higher yield compared to the N131/3600. This flexibility ensures a maximum turbine utilization across different sites.
Despite the considerable increase in nominal output and blade length, the design of the N149/4.0-4.5 achieves the low sound power levels expected from a much smaller turbine. This is a crucial factor for optimising windfarms and facilitating permitting especially in populated areas.
In addition, Nordex also offers a wide range of sound-optimised operating modes that make it possible to run WTGs at particularly sound-critical locations. The turbines still achieve optimal energy yield thanks to Nordex Flexible Sound Management functionality. Even at a maximum sound power level of 96.5 dB(A), the turbine is able to produce close to 3 MW nominal power.
Icing on the rotor blades can reduce the efficiency of a wind turbine generator and lower its availability. For the N149/4.0-4.5, Nordex has taken the next step for increased performance under icing conditions. The proven Nordex rotor blade anti-icing-system has been further developed to heat even more blade area and efficiently avoids or reduces icing on the rotor blades. Nordex customers can rely on their turbines for dependable yields and maximum availability in even the coldest locations.
Several different hub height options make it possible to optimally utilize the wind resources at diverse sites. Tall tower options up to 164 meters help to increase yield and make wind projects possible even at sites in forested areas or locations with complex topography.
The Delta4000 can take a large number of site-specific requirements into account using a single hardware variant. For this reason, it can be set exactly to the specific parameters of the grid operator, to local wind conditions and to the maximum permissible sound levels. This operational flexibility makes it possible to make use of different maximum ratings of individual turbines within a wind farm, thus exploiting the full potential of each turbine position.
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The drive train geometry of Generation Delta reduces the forces acting on the individual components, thereby reducing strain on the robust rotor bearing. On top of this, innovations in the cooling system design of the drive train ensure constant temperatures over a wide operating range, with lower internal energy consumption.
N149/4.0-4.5 provides rapid and protected access to the hub thanks to a complete rotor hub housing.
The nacelle of the Generation Delta is a safe and spacious workplace with well thought-out escape and rescue routes. Our design gives high priority to service-friendliness and reduction of maintenance downtimes.
All systems are easily accessible for maintenance.
On-board crane for components exchange (up to one ton).
The technical concept of the N149/4.0-4.5 minimises the service requirements over its entire working life; with each component designed for minimal maintenance. Furthermore, the turbine has been designed to cater to a mobile crane solution so that main components can be exchanged with minimal costs and effort.
The yaw drive system of the N149/4.0-4.5 was adapted to the increased nominal power and rotor size. Additional drives were added for a total of six yaw drives. However, should one drive break down, the turbine can continue to run temporarily on five drives, making it possible to plan any needed service work without interruption. This concept increases turbine availability and reduces service costs.
In order to further reduce electrical losses and simplify assembly of tower internals, the main converter and step-up transformer have been integrated into the nacelle. This ensures a higher annual energy production and simplifies installation on the construction site.