Wind Turbine Nacelle Cooling System with Shared Duct
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Solution Overview
Problem
Existing wind turbine cooling systems inefficiencies arise from using warmed air from within the nacelle to cool components, which reduces the temperature gradient and thus the effectiveness of heat exchangers, and there is a need for a system that can efficiently heat and cool components while maintaining a comfortable working environment for maintenance personnel.
Innovation Solution
A heating and cooling system that draws cool external air into the nacelle through vents, filters it, and directs it through a single fan to both the gearbox and generator heat exchangers via a shared cooling duct, with an optional bypass door and nacelle warming radiator to manage temperature gradients and maintain interior warmth during cold weather.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate heat exchangers with individual fans and ductwork are used for gearbox and generator cooling, then each component can be cooled independently, but the system complexity increases and warmed air from the nacelle reduces cooling efficiency
Solution Approach 1:
The patent combines multiple separate cooling systems into a single integrated cooling system. Instead of having separate fans and ductwork for each heat exchanger, the invention uses one common fan and shared ductwork to serve multiple heat exchangers (gearbox and generator cooling systems), thereby reducing system complexity while maintaining effective cooling through a unified air intake from outside the nacelle.
Solution Approach 2:
The common fan and shared ductwork system performs multiple cooling functions simultaneously. A single fan supplies cooled air to multiple heat exchangers serving different components (gearbox, generator), making the cooling system multi-functional and reducing the number of redundant parts while improving overall cooling efficiency by using outside air for all components.
2Ease of manufacture
If air is drawn from within the nacelle for cooling heat exchangers, then the cooling system is simpler to implement, but the temperature gradient is reduced and cooling efficiency decreases
Solution Approach 1:
The invention extracts the air intake source from inside the nacelle environment and relocates it to outside the nacelle. By drawing cool outside air directly through vents in the nacelle structure rather than using air already warmed within the nacelle, the system maintains a larger temperature gradient across the heat exchangers, significantly improving cooling efficiency while requiring minimal additional complexity.
3Reliability
If multiple separate cooling systems are used for different components, then each component receives dedicated cooling, but the overall energy consumption increases
Solution Approach 1:
The patent merges multiple separate cooling systems into a single integrated system where one fan supplies air to multiple heat exchangers. This consolidation reduces the total number of fans and motors required, thereby lowering energy consumption while still providing dedicated cooling paths for each component (gearbox and generator) through the shared air supply system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system enhances the efficiency of heat exchangers by using cool external air, maintains optimal component temperatures, and provides a more comfortable working environment by regulating nacelle interior temperatures, improving both cooling and heating processes.
Implementation Method 1
a gearbox heat exchanger, generator heat exchanger
Implementation Method 2
transport air across both heat exchangers to cool the gearbox and generator
Implementation Method 3
cooling duct connected to the gearbox and generator heat exchangers, and used to transport air across both heat exchangers
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A heating and cooling system for a wind turbine (100) is provided and includes a gearbox (220), gearbox heat exchanger (222), generator (210), generator heat exchanger (212), and a cooling duct (320). The cooling duct (320) is connected to the gearbox and generator heat exchangers, and is used to transport air across both heat exchangers to cool the gearbox and generator.